Embed Size (px)
Citation preview
JYVÄSKYLÄN YLIOPISTO
Chemical selectivity of the
IGISOL/JYFLTRAP system
Heikki Penttilä
The IGISOL group
University of Jyvaskyla, Finland
JYVÄSKYLÄN YLIOPISTO
Fission ion guide technique
19.5.2016
Target
SPIG
electrode
Beam
Extractor
Based on survival of primary ions from nuclear reaction in helium buffer gas
Fast extraction of ions is required to prevent neutralisation
Charge state concentration: (0), +1, (+2)
Produces ions of any element
All elements can be studied
All ions come directly from fission Ion rate in the formed beam corresponds
to the independent fission yield
JYVÄSKYLÄN YLIOPISTO
Mass dependency of the stopped ions
19.5.2016
http://arxiv.org/abs/1409.0714
Simulations made by
Uppsala Universitet
collaboration
JYVÄSKYLÄN YLIOPISTO
Counting ions with JYFLTRAP
19.5.2016
JYVÄSKYLÄN YLIOPISTO
Counting ions with JYFLTRAP
19.5.2016
SPLAT
1.5
JYVÄSKYLÄN YLIOPISTO
Charge distributions
19.5.2016
1000
800
600
400
200
0
1280700128060012805001280400
Reference file: 2014-05-29 19:25:28C:MyTemp:data:A84_A85:m84_1:bunches.dat
84As 1280393, 1280391.8 Area = 696.000
84Se 1280558, 1280556.7 Area = 4093.000
84Br 1280588, 1280584.8 Area = 700.000
84Kr 1280664, 1280662.8 Area = 4693.000
JYVÄSKYLÄN YLIOPISTO
6000
5000
4000
3000
2000
1000
0
As Se Br SrKr
a =315.66 ± 18x0 =29.987 ± 0.0301w =0.6638 ± 0.0216
A = 84Stable isotopeImpurity in helium57 % natural abundance
a =5632.6 ± 0.00863 x0 =33.925 ± 52.2 w =0.79643 ± 68.7
Charge distributions
19.5.2016
1000
800
600
400
200
0
1280700128060012805001280400
Reference file: 2014-05-29 19:25:28C:MyTemp:data:A84_A85:m84_1:bunches.dat
84As 1280393, 1280391.8 Area = 696.000
84Se 1280558, 1280556.7 Area = 4093.000
84Br 1280588, 1280584.8 Area = 700.000
84Kr 1280664, 1280662.8 Area = 4693.000
JYVÄSKYLÄN YLIOPISTO
Charge distributions
19.5.2016
JYVÄSKYLÄN YLIOPISTO
Yu. Kudryavtsev, et al
NIMB 266, 4368–4372 (2008)
http://dx.doi.org/10.1016/j.nimb.2008.05.037
(Ar ionisation potential ~16 eV)
Efficiency from a known yield distribution
Yield distribution
from 252Cf source
JYVÄSKYLÄN YLIOPISTO
Way around the chemical dependencies
19.5.2016
Element-dependent (chemical) effects
in transmission same for all isotopes
of the same element
120
100
80
60
40
20
0
120 118 116 114 112 110 108
Fit results for Pd c
2 = 0.36343
<A> = 114.8 ± 0.072003 W = 2.8086 ± 0.058443 Y = 100 ± 0.38865
JYVÄSKYLÄN YLIOPISTO
From isotopic yields …
19.5.2016
140
120
100
80
60
40
20
0
9290888684
Fit results for Br
c2 = 0.13871
<A> = 86.829 ± 0.06904 W = 2.7066 ± 0.11047 Y = 100 ± 4.6643
140
120
100
80
60
40
20
0
989694929088
Fit results for Rb
c2 = 3.7498
<A> = 92.114 ± 0.046949 W = 2.6151 ± 0.056959 Y = 100 ± 4.6665
140
120
100
80
60
40
20
0
1021009896949290
Fit results for Y
c2 = 1.5109
<A> = 96.841 ± 0.082338 W = 2.778 ± 0.085224 Y = 100 ± 2.3414
140
120
100
80
60
40
20
0
114112110108106104
Fit results for Ru
c2 = 1.5816
<A> = 109.59 ± 0.050538 W = 2.5371 ± 0.050741 Y = 100 ± 0.95159
140
120
100
80
60
40
20
0
120118116114112110108
Fit results for Pd
c2 = 0.36343
<A> = 114.8 ± 0.072003 W = 2.8086 ± 0.058443 Y = 100 ± 0.38865
140
120
100
80
60
40
20
0
128126124122120118116
Fit results for In
c2 = 0.30896
<A> = 123.49 ± 0.077068 W = 2.6972 ± 0.063651 Y = 100 ± 1.3324
JYVÄSKYLÄN YLIOPISTO
…to absolute yields?
19.5.2016
60
55
50
45
40
35
30
100908070605040
25 MeV p + 238U
JYVÄSKYLÄN YLIOPISTO
Mass yields
19.5.2016
Eur. Phys. J. A (2016) 52: 104
http://dx.doi.org/10.1140/epja/i2016-16104-4
JYVÄSKYLÄN YLIOPISTO
Independent absolute yields
19.5.2016
140
120
100
80
60
40
20
0
9290888684
Fit results for Br
c2 = 0.13871
<A> = 86.829 ± 0.06904 W = 2.7066 ± 0.11047 Y = 100 ± 4.6643
140
120
100
80
60
40
20
0
989694929088
Fit results for Rb
c2 = 3.7498
<A> = 92.114 ± 0.046949 W = 2.6151 ± 0.056959 Y = 100 ± 4.6665
140
120
100
80
60
40
20
0
1021009896949290
Fit results for Y
c2 = 1.5109
<A> = 96.841 ± 0.082338 W = 2.778 ± 0.085224 Y = 100 ± 2.3414
140
120
100
80
60
40
20
0
114112110108106104
Fit results for Ru
c2 = 1.5816
<A> = 109.59 ± 0.050538 W = 2.5371 ± 0.050741 Y = 100 ± 0.95159
140
120
100
80
60
40
20
0
120118116114112110108
Fit results for Pd
c2 = 0.36343
<A> = 114.8 ± 0.072003 W = 2.8086 ± 0.058443 Y = 100 ± 0.38865
140
120
100
80
60
40
20
0
128126124122120118116
Fit results for In
c2 = 0.30896
<A> = 123.49 ± 0.077068 W = 2.6972 ± 0.063651 Y = 100 ± 1.3324
JYVÄSKYLÄN YLIOPISTO
Independent absolute yields
19.5.2016
140
120
100
80
60
40
20
0
9290888684
Fit results for Br
c2 = 0.13871
<A> = 86.829 ± 0.06904 W = 2.7066 ± 0.11047 Y = 100 ± 4.6643
140
120
100
80
60
40
20
0
989694929088
Fit results for Rb
c2 = 3.7498
<A> = 92.114 ± 0.046949 W = 2.6151 ± 0.056959 Y = 100 ± 4.6665
140
120
100
80
60
40
20
0
1021009896949290
Fit results for Y
c2 = 1.5109
<A> = 96.841 ± 0.082338 W = 2.778 ± 0.085224 Y = 100 ± 2.3414
140
120
100
80
60
40
20
0
114112110108106104
Fit results for Ru
c2 = 1.5816
<A> = 109.59 ± 0.050538 W = 2.5371 ± 0.050741 Y = 100 ± 0.95159
140
120
100
80
60
40
20
0
120118116114112110108
Fit results for Pd
c2 = 0.36343
<A> = 114.8 ± 0.072003 W = 2.8086 ± 0.058443 Y = 100 ± 0.38865
140
120
100
80
60
40
20
0
128126124122120118116
Fit results for In
c2 = 0.30896
<A> = 123.49 ± 0.077068 W = 2.6972 ± 0.063651 Y = 100 ± 1.3324
60
55
50
45
40
35
30
100908070605040
JYVÄSKYLÄN YLIOPISTO
”Absolute” and experimental yield ratios
19.5.2016
108Tc
108Ru
JYVÄSKYLÄN YLIOPISTO
”Absolute” and experimental yield ratios
19.5.2016
130Sb 130Te
130Sn
JYVÄSKYLÄN YLIOPISTO
Efficiency ratios between elements
19.5.2016
JYVÄSKYLÄN YLIOPISTO
Efficiency ratios between elements
19.5.2016
JYVÄSKYLÄN YLIOPISTO
Charge distribution modification
19.5.2016
1000
800
600
400
200
0
1280700128060012805001280400
Reference file: 2014-05-29 19:25:28C:MyTemp:data:A84_A85:m84_1:bunches.dat
84As 1280393, 1280391.8 Area = 696.000
84Se 1280558, 1280556.7 Area = 4093.000
84Br 1280588, 1280584.8 Area = 700.000
84Kr 1280664, 1280662.8 Area = 4693.000
JYVÄSKYLÄN YLIOPISTO
19.5.2016
Relative efficiency fluctuation
JYVÄSKYLÄN YLIOPISTO JYVÄSKYLÄN YLIOPISTO
19.5.2016
IGISOL group and
relevant collaboration:
JYFL-IGISOL: H. Penttilä, A. Jokinen, I.D.Moore, J. Äystö, V.A. Rubchenya, S. Rinta-Antila, V.S. Kolhinen, T. Eronen, A. Kankainen, A. Voss, D. Gorelov, J. Hakala, V. Simutkin, V. Sonnenschein, I. Pohjalainen, J. Koponen, J. Reinikainen
This work has been supported by Academy of Finland via several projects and the Centre of Excellence program, as well as by EU via ERINDA (2010-2013) and CHANDA (2013-2017) projects.
JYVÄSKYLÄN YLIOPISTO
25 MeV p + natU fission : centroids
AUNC = Z × 𝐴(𝑝+𝑈)
𝑍(𝑝+𝑈)
H. Penttila et al, Eur. Phys. J. A (2016) 52: 104
http://dx.doi.org/10.1140/epja/i2016-16104-4
JYVÄSKYLÄN YLIOPISTO
60
55
50
45
40
35
30
100908070605040
Independent absolute yields
19.5.2016
140
120
100
80
60
40
20
0
9290888684
Fit results for Br
c2 = 0.13871
<A> = 86.829 ± 0.06904 W = 2.7066 ± 0.11047 Y = 100 ± 4.6643
140
120
100
80
60
40
20
0
989694929088
Fit results for Rb
c2 = 3.7498
<A> = 92.114 ± 0.046949 W = 2.6151 ± 0.056959 Y = 100 ± 4.6665
140
120
100
80
60
40
20
0
1021009896949290
Fit results for Y
c2 = 1.5109
<A> = 96.841 ± 0.082338 W = 2.778 ± 0.085224 Y = 100 ± 2.3414
140
120
100
80
60
40
20
0
114112110108106104
Fit results for Ru
c2 = 1.5816
<A> = 109.59 ± 0.050538 W = 2.5371 ± 0.050741 Y = 100 ± 0.95159
140
120
100
80
60
40
20
0
120118116114112110108
Fit results for Pd
c2 = 0.36343
<A> = 114.8 ± 0.072003 W = 2.8086 ± 0.058443 Y = 100 ± 0.38865
140
120
100
80
60
40
20
0
128126124122120118116
Fit results for In
c2 = 0.30896
<A> = 123.49 ± 0.077068 W = 2.6972 ± 0.063651 Y = 100 ± 1.3324
![Recent experiments at the JYFLTRAP Penning trap · 2021. 1. 11. · JYFLTRAP [5–7] is a cylindrical double Penning trap mass spectrometer located inside a 7 T superconducting solenoid](https://img.pdfslide.us/doc/110x75/61199a260d2737404639e25c/recent-experiments-at-the-jyfltrap-penning-trap-2021-1-11-jyfltrap-5a7.jpg)
