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In-Gas Laser Ionization and Spectroscopy of Ac
A quest for the atomic and nuclear structure of heavy elements
Rafael Ferrer
KU Leuven Instituut voor Kern- en StralingsfysicaBelgium
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
In-Gas Laser Ionization and Spectroscopy of RIBrsquos
Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401
excimer 1
excimer 2
dye
reference cell
He-Ne
λ-meter gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
tape station windmill
collector plates
SHG
SEM
Ionization chamber
Laser Hut
dye
~ 15 m
measuring station
Max rep 200 Hz
λ1
λ2
Leuven Isotope Separator On-Line facility
In-gas-cell laser spectroscopy of neutron deficient Cu Ag and Ac
isotopes T E Cocolios et al PRL 103 (2009) 102501 T E Cocolios et al PRC 81 (2010) 014314 R Ferrer et al PLB 728 (2014) 191
R Ferrer ECT August 24-27 2015
Production amp First Spectroscopy of Ac212-215Ac
Blaum Dilling NoertershaeuserPhys Scr T152 (2013) 014017
etotal~1
IP 4339445 cm-1
2D32
4P52
418312 nm
43921 nm
gs
continuum
2389886 cm-1
466606 cm-1
J Rossnagel et al PRA 85 (2012) 012525
197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac
0
50
100
150
238990 238995 239000 239005 239010 239015 239020 239025
0
25
50
75
100 213Ac
212Ac
Alp
ha c
ount
s in
100
s
Wavenumbers (cm-1)
X
2D32
4P32 52
43858 nm
4347 nm
gs
continuum
22801 1cm-1
46810cm-1
IP 4339445 cm-1
228010 228015 228020 228025 228030 228035 228040 228045 228050
50
100
150
200
Alp
ha c
ounts
in 2
00 s
Wavenumbers (cm-1)
212Ac T12
= 920 ms I= (6+)
R Ferrer ECT August 24-27 2015
100
200
300
400
100
200
300
400
25
50
75
100
125
228015 228020 228025 228030 228035 228040 2280450
25
50
75
T12
= 093 s
T12
= 08 s
T12
= 82 s
T12
= 017 s
Alph
a co
unts
in 1
00 s
Alph
a co
unts
in 2
00 s
212Ac
213Ac
214Ac
Wavenumbers (cm-1)
215Ac
HFS of 212-215Ac - 438 nm transition -Pressure shift and broadening
228036 228037 228038 228039 228040 228041 228042 2280430
50
100
150
200
250 550 mbar 360 mbar 280 mbar 210 mbar
Alp
ha c
ount
s in
50
s
Wavenumbers (cm-1)
200 250 300 350 400 450 500 550 600
2280388
2280390
2280392
2280394
centr
oid
(cm
-1)
pressure (mbar)
sh
= 42(8) MHzmbar
200 250 300 350 400 450 500 550 600010
015
020
025
030
035
coll
= 122(2) MHzmbar
wid
th (
cm-1)
pressure (mbar)
227Ac
226Ac
225Ac
215Ac
214Ac
213Ac
212Ac
TRIU
MF
Coun
ts (a
rb U
)
Wavenumbers
R Ferrer ECT August 24-27 2015
m Odd-A Nuclei and Isotope Shifts
In order to determine mean charge radii
- Calculate electronic factor and specific mass shift
- Use King plot to test calculations
- Proton g-factors of 213215Ac consistent with observed trend for spin 92
- Spin 32 for 225Ac only possibility according to observed hfs
- Spin 1 for 226Ac according to observed hfs
PhD Thesis Camilo Granados
-30 -25 -20 -15 -10 -5 0
-30
-25
-20
-15
-10
-5
0
5
(214215)
(215227)
(213214)
Mod
IS
418
nm
1
08 (
MH
z am
u)
Mod IS 438 nm 108 (MHz amu)
(212213)
bull Resolution insufficient to determine spectroscopic quadrupole moment
bull Spin determination relies on trends
Higher resolution needed
R Ferrer ECT August 24-27 2015
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
In-Gas Laser Ionization and Spectroscopy of RIBrsquos
Yu Kudryavtev et al NIM B 114 (1996) 350 M Facina et al NIM B 226 (2004) 401
excimer 1
excimer 2
dye
reference cell
He-Ne
λ-meter gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
tape station windmill
collector plates
SHG
SEM
Ionization chamber
Laser Hut
dye
~ 15 m
measuring station
Max rep 200 Hz
λ1
λ2
Leuven Isotope Separator On-Line facility
In-gas-cell laser spectroscopy of neutron deficient Cu Ag and Ac
isotopes T E Cocolios et al PRL 103 (2009) 102501 T E Cocolios et al PRC 81 (2010) 014314 R Ferrer et al PLB 728 (2014) 191
R Ferrer ECT August 24-27 2015
Production amp First Spectroscopy of Ac212-215Ac
Blaum Dilling NoertershaeuserPhys Scr T152 (2013) 014017
etotal~1
IP 4339445 cm-1
2D32
4P52
418312 nm
43921 nm
gs
continuum
2389886 cm-1
466606 cm-1
J Rossnagel et al PRA 85 (2012) 012525
197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac
0
50
100
150
238990 238995 239000 239005 239010 239015 239020 239025
0
25
50
75
100 213Ac
212Ac
Alp
ha c
ount
s in
100
s
Wavenumbers (cm-1)
X
2D32
4P32 52
43858 nm
4347 nm
gs
continuum
22801 1cm-1
46810cm-1
IP 4339445 cm-1
228010 228015 228020 228025 228030 228035 228040 228045 228050
50
100
150
200
Alp
ha c
ounts
in 2
00 s
Wavenumbers (cm-1)
212Ac T12
= 920 ms I= (6+)
R Ferrer ECT August 24-27 2015
100
200
300
400
100
200
300
400
25
50
75
100
125
228015 228020 228025 228030 228035 228040 2280450
25
50
75
T12
= 093 s
T12
= 08 s
T12
= 82 s
T12
= 017 s
Alph
a co
unts
in 1
00 s
Alph
a co
unts
in 2
00 s
212Ac
213Ac
214Ac
Wavenumbers (cm-1)
215Ac
HFS of 212-215Ac - 438 nm transition -Pressure shift and broadening
228036 228037 228038 228039 228040 228041 228042 2280430
50
100
150
200
250 550 mbar 360 mbar 280 mbar 210 mbar
Alp
ha c
ount
s in
50
s
Wavenumbers (cm-1)
200 250 300 350 400 450 500 550 600
2280388
2280390
2280392
2280394
centr
oid
(cm
-1)
pressure (mbar)
sh
= 42(8) MHzmbar
200 250 300 350 400 450 500 550 600010
015
020
025
030
035
coll
= 122(2) MHzmbar
wid
th (
cm-1)
pressure (mbar)
227Ac
226Ac
225Ac
215Ac
214Ac
213Ac
212Ac
TRIU
MF
Coun
ts (a
rb U
)
Wavenumbers
R Ferrer ECT August 24-27 2015
m Odd-A Nuclei and Isotope Shifts
In order to determine mean charge radii
- Calculate electronic factor and specific mass shift
- Use King plot to test calculations
- Proton g-factors of 213215Ac consistent with observed trend for spin 92
- Spin 32 for 225Ac only possibility according to observed hfs
- Spin 1 for 226Ac according to observed hfs
PhD Thesis Camilo Granados
-30 -25 -20 -15 -10 -5 0
-30
-25
-20
-15
-10
-5
0
5
(214215)
(215227)
(213214)
Mod
IS
418
nm
1
08 (
MH
z am
u)
Mod IS 438 nm 108 (MHz amu)
(212213)
bull Resolution insufficient to determine spectroscopic quadrupole moment
bull Spin determination relies on trends
Higher resolution needed
R Ferrer ECT August 24-27 2015
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
Production amp First Spectroscopy of Ac212-215Ac
Blaum Dilling NoertershaeuserPhys Scr T152 (2013) 014017
etotal~1
IP 4339445 cm-1
2D32
4P52
418312 nm
43921 nm
gs
continuum
2389886 cm-1
466606 cm-1
J Rossnagel et al PRA 85 (2012) 012525
197Au(20Ne-145 MeV4-5n)212213Ac 197Au(22Ne-143 MeV4-5n)214215Ac
0
50
100
150
238990 238995 239000 239005 239010 239015 239020 239025
0
25
50
75
100 213Ac
212Ac
Alp
ha c
ount
s in
100
s
Wavenumbers (cm-1)
X
2D32
4P32 52
43858 nm
4347 nm
gs
continuum
22801 1cm-1
46810cm-1
IP 4339445 cm-1
228010 228015 228020 228025 228030 228035 228040 228045 228050
50
100
150
200
Alp
ha c
ounts
in 2
00 s
Wavenumbers (cm-1)
212Ac T12
= 920 ms I= (6+)
R Ferrer ECT August 24-27 2015
100
200
300
400
100
200
300
400
25
50
75
100
125
228015 228020 228025 228030 228035 228040 2280450
25
50
75
T12
= 093 s
T12
= 08 s
T12
= 82 s
T12
= 017 s
Alph
a co
unts
in 1
00 s
Alph
a co
unts
in 2
00 s
212Ac
213Ac
214Ac
Wavenumbers (cm-1)
215Ac
HFS of 212-215Ac - 438 nm transition -Pressure shift and broadening
228036 228037 228038 228039 228040 228041 228042 2280430
50
100
150
200
250 550 mbar 360 mbar 280 mbar 210 mbar
Alp
ha c
ount
s in
50
s
Wavenumbers (cm-1)
200 250 300 350 400 450 500 550 600
2280388
2280390
2280392
2280394
centr
oid
(cm
-1)
pressure (mbar)
sh
= 42(8) MHzmbar
200 250 300 350 400 450 500 550 600010
015
020
025
030
035
coll
= 122(2) MHzmbar
wid
th (
cm-1)
pressure (mbar)
227Ac
226Ac
225Ac
215Ac
214Ac
213Ac
212Ac
TRIU
MF
Coun
ts (a
rb U
)
Wavenumbers
R Ferrer ECT August 24-27 2015
m Odd-A Nuclei and Isotope Shifts
In order to determine mean charge radii
- Calculate electronic factor and specific mass shift
- Use King plot to test calculations
- Proton g-factors of 213215Ac consistent with observed trend for spin 92
- Spin 32 for 225Ac only possibility according to observed hfs
- Spin 1 for 226Ac according to observed hfs
PhD Thesis Camilo Granados
-30 -25 -20 -15 -10 -5 0
-30
-25
-20
-15
-10
-5
0
5
(214215)
(215227)
(213214)
Mod
IS
418
nm
1
08 (
MH
z am
u)
Mod IS 438 nm 108 (MHz amu)
(212213)
bull Resolution insufficient to determine spectroscopic quadrupole moment
bull Spin determination relies on trends
Higher resolution needed
R Ferrer ECT August 24-27 2015
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
100
200
300
400
100
200
300
400
25
50
75
100
125
228015 228020 228025 228030 228035 228040 2280450
25
50
75
T12
= 093 s
T12
= 08 s
T12
= 82 s
T12
= 017 s
Alph
a co
unts
in 1
00 s
Alph
a co
unts
in 2
00 s
212Ac
213Ac
214Ac
Wavenumbers (cm-1)
215Ac
HFS of 212-215Ac - 438 nm transition -Pressure shift and broadening
228036 228037 228038 228039 228040 228041 228042 2280430
50
100
150
200
250 550 mbar 360 mbar 280 mbar 210 mbar
Alp
ha c
ount
s in
50
s
Wavenumbers (cm-1)
200 250 300 350 400 450 500 550 600
2280388
2280390
2280392
2280394
centr
oid
(cm
-1)
pressure (mbar)
sh
= 42(8) MHzmbar
200 250 300 350 400 450 500 550 600010
015
020
025
030
035
coll
= 122(2) MHzmbar
wid
th (
cm-1)
pressure (mbar)
227Ac
226Ac
225Ac
215Ac
214Ac
213Ac
212Ac
TRIU
MF
Coun
ts (a
rb U
)
Wavenumbers
R Ferrer ECT August 24-27 2015
m Odd-A Nuclei and Isotope Shifts
In order to determine mean charge radii
- Calculate electronic factor and specific mass shift
- Use King plot to test calculations
- Proton g-factors of 213215Ac consistent with observed trend for spin 92
- Spin 32 for 225Ac only possibility according to observed hfs
- Spin 1 for 226Ac according to observed hfs
PhD Thesis Camilo Granados
-30 -25 -20 -15 -10 -5 0
-30
-25
-20
-15
-10
-5
0
5
(214215)
(215227)
(213214)
Mod
IS
418
nm
1
08 (
MH
z am
u)
Mod IS 438 nm 108 (MHz amu)
(212213)
bull Resolution insufficient to determine spectroscopic quadrupole moment
bull Spin determination relies on trends
Higher resolution needed
R Ferrer ECT August 24-27 2015
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
m Odd-A Nuclei and Isotope Shifts
In order to determine mean charge radii
- Calculate electronic factor and specific mass shift
- Use King plot to test calculations
- Proton g-factors of 213215Ac consistent with observed trend for spin 92
- Spin 32 for 225Ac only possibility according to observed hfs
- Spin 1 for 226Ac according to observed hfs
PhD Thesis Camilo Granados
-30 -25 -20 -15 -10 -5 0
-30
-25
-20
-15
-10
-5
0
5
(214215)
(215227)
(213214)
Mod
IS
418
nm
1
08 (
MH
z am
u)
Mod IS 438 nm 108 (MHz amu)
(212213)
bull Resolution insufficient to determine spectroscopic quadrupole moment
bull Spin determination relies on trends
Higher resolution needed
R Ferrer ECT August 24-27 2015
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
0
50
100
150
200
Wavenumbers (cm-1)
Alp
ha c
ount
s in
50
s
215Ac
In-Gas-Jet Spectroscopy
Yu Kudryavtsev et al NIM B 297 (2013) 7
T Sonoda et al NIM B267 (2009) 2918R Ferrer et al NIM B 291 (2012) 29
Tisa
λ-meter
gas cell
CYCLONE 110cyclotron beam
SPIG
target
acceloptics
dipole magnet
detector station
collector plates
SEM
SHG
Nd
YA
G
Dio
de
Tisa SHG
ionization volume
Rep rate 10 kHz
Figures of merit
Resolution ~ 5e-7 (FWHM~ 400 MHz)
Selectivity ~ 200
Efficiency ~ 05
R Ferrer ECT August 24-27 2015
0
50
100
150
200
250
300
350
400
450
In gas jet in gas cell
Alp
ha c
ount
s in
50
s
100
s
Wavenumbers (cm-1)
215Ac
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
bull Observed spectral widths jet T and jet divergence and laser power
bull Reduction energy up to 80 nJ singlet FWHM~300 MHz mainly Gaussian contribution
In-Gas-Jet Spectroscopy of 214215AcDoppler Broadening (MHz) Velocity (ms)
y (m
m)
X (mm)
y (m
m)
Improve spatial overlap to increase efficiency 110 to 1010
Design of a better nozzle and characterization of gas jets off-line HELIOS lab at KU Leuven
In-jet spectroscopy results in
bull an improvement in uncertainties of isotope shifts and magnetic hf constant A
bull access to B quadrupole moments
0
25
50
75
Alph
a co
unts
in 5
0 s
Wavenumbers (cm-1)
hfs triplet in 214Ac
R Ferrer ECT The interplay between atomic and nuclear physics to study exotic nuclei August 24-27 2015
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
0
25
50
75
100
125
- 6835597814 MHz (MHz)
c
ou
nts
in 5
0 s
214AcT12= 82 s
Data Analysis 214Ac
CoG
bull 25-fold improved uncertainties in CoG and hf constant A wrt gas cell results
bull 10 times smaller quadrupole moment than that in 227Ac
R Ferrer ECT August 24-27 2015
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
0
50
100
150
200
c
ount
s in
50
s
- 6835597814 MHz (MHz)
Data Analysis 215Ac
215AcT12= 170 ms
CoG
bull Isotope shift dn215214 = 2998(8) MHz
bull Small quadrupole moment N=126 good magic number
error in m dominated by error of 227Ac input from theory is required
R Ferrer ECT August 24-27 2015
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
05
06
07
08
09
10
SM (H Grawe et al) Experiment
g p
Bi At Fr Ac
Situation for N= 126 Isotones
M R Pearson et al J Phys G 26 (2000) 1829
Bi At Fr Ac
-04
-02
00
02
SM (H Grawe et al) Experiment
Q (
b)
bull Shell model predictions are in good agreement with experimental quadrupole moments
bull Proton g-factor of 215Ac might indicate core polarization effect
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
Acknowledgments
AND THANK YOU ALL FOR YOUR ATTENTION
Collaborators
JYFL University of Jyvaumlskylauml I Moore V Sonnenschein
GANIL- IPN Orsay ndash LPC CaenB Bastin D Boilley Ph Dambre P Delahaye P Duchesne X Fleacutechard S Franchoo L
Hijazi N Lecesne H Lu F Lutton Y Merrer B Osmond J Piot O Pochon H Savajols J C Thomas E Traykov
RILIS-ISOLDE S Rothe TRIUMF P Kunz J Lassen A Teigelhoefer
University of Mainz R Heinke T Kron P Nauberreit P Schoenberg K Wendt
GSI M Block M Laatiaoui
P Creemers R de Groote LP Gaffney L Ghys C Granados M Huyse Yu Kudryavtsev Y Martiacutenez E Mogilevskiy S Raeder S Sels P Van den Bergh P Van Duppen
A Zadvornaya
KU Leuven
