DubnaRadioaciveIonBeamsDRIBsIII: STATUS and PROSPECTS

S. Sidorchuk (JINR, Dubna)

9-16 May 2013, Varna, Bulgaria1

2

Chart of Nuclides

Halo nuclei; Nucleon stability borders; New types of radioactivity; Shell structure evolution; Astrophysical applications; Lightest dripline nuclei - “playground” for testing theoretical models.

Stability island:Physical and chemical properties of the heaviest elements.

Neutron drip-line

Proton drip-line

D.I. Mendeleev’s Periodic Table of the Elements (2012)

Structure of exotic nuclei near and beyond the drip-lines

Beam Energy,MeV/u

Intensity, pps Purity, %

6Не 20 - 45 1106 998Не 15 - 30 5104 989Li 15 - 45 1106 9811Li 15 - 35 1104 9512Be 15 - 40 1106 9014Be 15 - 35 3103 8010C 30 - 40 1 104 7516C 15 - 45 3105 80

18C 15 - 40 3103 8012N 30 - 40 2x104 2513O 35 - 45 4x103 514O 30 - 45 2x105 5015O 20 - 45 5x106 60

17Ne 20 - 35 3x103 518Ne 20 - 40 2x106 50

Cryogenic tritium/deuterium target, transfer reactions:4,5H, 5-10He, 10-13Li, 12-16Be…

Shell structure evolution – 9,10He; Two-proton radioactivity, rare decays:

Optical Time Projection Chamber ; Lightest dripline nuclei - “playground” for testing theoretical models.

0

2

4

6

n p n p n p n p

shell population scheme

1

2+

1s-0d0p1/2

0p3/20p

1

1

1

2+

2+

2+1

Exci

tatio

n en

ergy

E *

(MeV

)

18Ne 16O 14C 12Be 10He

2+

N = 8 isotone

0+ ground state

0sn p

6

What next?EXOTIC NUCLEI:

Mass range of secondary beams; Intensity of secondary beams; Beam purity;

SHE: Heaviest target: 249Cf → Zmax= 118 Heavier projectiles (50Ti, 54Cr, 58Fe, 64Ni) Heavier targets (251Cf, 254Es -???); Symmetric reactions: 136Xe+136Xe, 136Xe+150Nd,

150Nd+150Nd; Nucleon transfer reactions (136Xe+208Pb, 238U+248Cm).

Sufficient increasing of overall experiment efficiency is needed!

Project DRIBs-III (2010 – 2016)

The purpose of the project is expansion of a set of accelerated ions, both of stable, and radioactive isotopes, essential increase of intensity and quality of beams.

Realization of project DRIBs-III provides:creation of the high-intensity universal accelerator of heavy

ions (A≤ 100, E ≤ 10 MeV ·A , I ≤ 10 pµA),creation of a new experimental hall (2600 m2),completion of modernization of cyclotrons U400 and U400М, creation of new generation experimental set-ups.

Funds: 60,000,000 $.

Full-scale realization off the DRIBs-III

U400M

DRIBs

MT25

U200

IC100

Nuclear physics with stable & RI-beams

U400M &SC ECR

Nano/Lab1500m2

1500m21000m2

DC-280 new

SHE Factory

Production & study of exotic nuclei

Appliedresearch

U400Rupgraded

Schedule of the SHE factory creation

DC280-cyclotron – stand-alone SHE-factory

Synthesis and study of properties of superheavy elements.

Search for new reactions for SHE-synthesis.

Chemistry of new elements.

DC280 (expected)E=4÷8 MeV/A

Ion Ion energy[MeV/A]

Output intensity

7Li 4 1×1014

18O 8 1×1014

40Ar 5 6×1013

48Ca 5 0,6-1,2×1014

54Cr 5 2×1013

58Fe 5 1×1013

124Sn 5 2×1012

136Xe 5 1×1014

238U 7 5×1010

Manufacturing of DC280 has been started.

SHE Factory construction area

0

1

2

3

4

Targetwheel Quadrupole

lens I

Quadrupolelens II

Beam

Recoil stoppingchamber

carrier gas

to detectors

Magneticdipole

Distance in metres

“physical” “chemical”

Reaction Transmission 244Pu(48Ca,3n)289114 60 %244Pu(58Fe,4n)298120 75 %

New FLNR gas-filled separator PAC for NP 32nd Meeting, 17-18 June 2010

Mass-spectrometer MASHA PAC for NP 31st Meeting, 25-26 January 2010

Fragment-separator ACCULINNA-2

Manufacturing has been started

Flerov Laboratory of Nuclear Reactions (JINR)

THANK YOUFOR YOUR

ATTENTION !

High transmission for asymmetric combinations (beams of 12C, 14N,16O, 22Ne)Availability for symmetric combinations (136Xe + 136Xe → 272Hs*)

Velocity filter for asymmetric combinationsVASSILISSA-GABRIELLA

PAC for NP 31st Meeting, 25-26 January 2010

ACC / ACC-2FLNR JINR

RIPS / BigRIBSRIKEN

A1900MSU

FRS / SuperFRSGSI

LISE3GANIL

DW, msr 0.9 / 5.8 5.0 / 8.0 8.0 0.32 / 5.0 1.0Dp/p, % ± 2.5 / ± 3.0 ± 3.0 / 6.0 ± 5.5 ± 2.0 / 5.0 ± 5.0Rp/Dp 1000 / 2000 1500 / 3300 2915 8600 / 3050 2200Br, Tm 3.2 / 3.9 5.76 / 9.0 6.0 18 / 18 3.2 - 4.3

Length, m 21 / 38 27 / 77 35 74 / 140 19(42)E, AMeV 10÷40 / 6÷60 50÷90 / 350 110÷160 220÷1000/1500 40÷80

AdditionalRIB Filter

No / RF-kicker RF-kicker / S-form S-form & RF- kicker

S-form / Preseparator

Wien Filter

Characteristics of existing and new inflight RIB separators (DW and Dp/p are angular and momentum acceptances, Rp/Dp is the first-order

momentum resolution when 1 mm object size is assumed)

Joint Institute for Nuclear ResearchDubna

S yn thes is o f new e lem en ts;

an d spec tro scopyo f h ea vy nuc le i;

C hem ica l a nd ph ysica l p ro perties o f heavy a nd superhea vy nuc lides;

A p p lied s tud ies;

S tru c tu re o f ligh t nuc le i nea r and b eyond the d rip lines;

L ab ora tory o f H igh E n ergy P h ysics

L abo ra tory o f N u clear P rob lem s

L abora tory o f T h eore tica l P h ysics

L ab ora tory o f N eu tron P h ysics

L ab o f In form ation Tech n o log ies

L abo ra tory o f R ad ia tion B io logy

F lero v L a b o f N u clear R ea c tion s

18

U400MU400

DRIBs

MT25

U200

IC100

FLNR - 2011

Nanotechnology

SHEExotic NucleiE = 30 ÷ 50 MeV/nA < 20

Structure of exotic nuclei near and beyond the drip-lines

Beam Energy,MeV/u

Intensity, pps Purity, %

6Не 20 - 45 1106 998Не 15 - 30 5104 989Li 15 - 45 1106 9811Li 15 - 35 1104 9512Be 15 - 40 1106 9014Be 15 - 35 3103 8010C 30 - 40 1 104 7516C 15 - 45 3105 80

18C 15 - 40 3103 8012N 30 - 40 2x104 2513O 35 - 45 4x103 514O 30 - 45 2x105 5015O 20 - 45 5x106 60

17Ne 20 - 35 3x103 518Ne 20 - 40 2x106 50

Cryogenic tritium/deuterium target, transfer reactions:4,5H, 5-10He, 10-13Li, 12-16Be…

Shell structure evolution – 9,10He; Two-proton radioactivity, rare decays:

Optical Time Projection Chamber ; Lightest dripline nuclei - “playground” for testing theoretical models.

0

2

4

6

n p n p n p n p

shell population scheme

1

2+

1s-0d0p1/2

0p3/20p

1

1

1

2+

2+

2+1

Exci

tatio

n en

ergy

E *

(MeV

)

18Ne 16O 14C 12Be 10He

2+

N = 8 isotone

0+ ground state

0sn p

45

Fe

CCD