RISINGRISING Project ProjectAdam MajAdam Maj (IFJ PAN Kraków)

NEEN meeting in KrakowSeptember 14/15 2004

Rare Isotopes Investigation at GSI

Rare isotopes production: projectile fragmentation and

fission9Be targetexotic nuclei (also neutron deficient)fragments nearly retain the projectile direction and velocity

208Pb target, heavy beam (238U)neutron rich nucleifragments can be faster than the projectile

Interaction zone

Coulomb field

RISING@GSIThe Accelerators:

UNILAC (injector) - E<15 AMeV

SIS - E <2 AGeV

Beams:HI ranging up to 238U Currents:

238U - 2* 108 ppsmedium mass nuclei- 109

pps (A~130)

In beam-spectroscopy

Rare isotope selection at FRS

( technique)20m secondary beam

78Ni ~ 100 AMeV

primary beam86Kr ~700 AMeV

production target9Be

fmagnetic dipoles degrader

fully striped fragments

Transmission : • 20-70 % for

fragmentation• < 2 % for fission

PlannedPlanned RISING campaignsRISING campaigns2003-20062003-2006

Fast beam campaignFast beam campaign1.1. Relativistic Coulomb excitations (E2 and E1)Relativistic Coulomb excitations (E2 and E1)

2.2. Break-up reactionsBreak-up reactions

3.3. Isomeric beamsIsomeric beams

4.4. g-factors of short lived states (transient fields)g-factors of short lived states (transient fields) Stopped beam campaignStopped beam campaign1.1. g-factor measurementsg-factor measurements of long lived isomers of long lived isomers

2.2. Decay of isomersDecay of isomers ? ? Slowed down beam campaignSlowed down beam campaign

RISING setup for fast beamsRISING setup for fast beams

FRS

HECTOR8 BaF2 scintillators

CATECATE: : Position Position Sensitive Sensitive

CaCalorimeter lorimeter TeTelescopelescope

HECTOR: time spectrum

Comissioning exp.: Coulomb excitation in 84Kr @ 100 MeV/n (A. Maj et al.)

Relativistic CoulombE2 or E1 excitation of projectile

Break-up

EUROBALL15 cluster Ge-detectors(each having 7 capsules)

The design of -arrays at RISING

Ge Cluster detectors

BaF2 HECTOR detectors

beambeam

Target Target chamberchamber

CATE

5 Clusters at 15.90, d = 700mm5 Clusters at 330, d = 1295mm (700mm to 1400mm)5 Clusters at 360, d = 1372mm (700mm to 1400mm)For 1% energy resolution

eff = 1.52% at 1.3 MeV (66% from first ring)

15 clusters at GSI

15 Clusters at 700mm

eff = 2.92%, at 1.3 MeV, resolution 1.44%

Subjects to be studied with RISING

n-rich NucleiShell structure around 132SnNew shell closures at N=32Soft dipole modesNucleosynthesis

N ≈ Z NucleiShell structurepn pairingIsospin symmetryGT and Fermi decay

Nuclear ShapesShape CoexistenceShape transitionsK-isomerism

Heavy NucleiShell stabilizationShell evolution

The international collaborationThe international collaboration

•CEA Saclay •CSNSM Orsay •GANIL Caen•IPN Orsay

•CLRC Daresbury•Univ. Keele•Univ. Liverpool•Univ. Manchester•Univ. Paisley•Univ. Surrey•Univ. York

•FZ Juelich•FZ Rossendorf•GSI Darmstadt•HMI Berlin•LMU Muenchen•MPI Heidelberg•TU Darmstadt•Univ. Bonn•Univ. Koeln

•Univ. Leuven

•Univ. Demokritos

•INFN Genova•INFN Legnaro•INFN/Univ. Napoli•INFN/Univ. Padova•Univ. Camerino•Univ. Firenze•Univ. Milano

•KTH Stockholm•Univ. Lund•Univ. Uppsala

•NBI Copenhagen

•IFJ Krakow•IPJ Swierk•Univ. Krakow•Univ. Warszawa

•Australian Nat. Univ., Canberra

RISING Project duration 2003-2006

B D DK F I PL S UK

2.5% 22.5% 2.5% 15% 20% 7.5% 10% 20%

Memorandum of Understanding (2002)

„Countries will bid for the running costs in the following proportion”

10k10k€€

46k46k€€

?? -- 40k40k€€

?? 16k16k€€

?k€?k€2004

Application for SPUBM

Experiments performed so far

DatesDates Primary Primary

BeaBeammNucleus of Nucleus of

InterestInterestExperiment Experiment

typetype

2003 /5 weeks/2003 /5 weeks/

Aug 05 – Aug 11 Aug 05 – Aug 11

Sep 13 – Sep 22Sep 13 – Sep 22

132132Xe,Xe,8484Kr, Kr, 4040ArAr

132132Xe,Xe,8484Kr, Kr, 4040ArAr

CommissioninCommissioning;g;

CoulexCoulex

Sep 22 – Sep 29Sep 22 – Sep 29 8686KrKr 5656CrCr CoulexCoulex

Oct 11 – Oct 20Oct 11 – Oct 20 5858NiNi 5353Mn, Mn, 5353NiNi FragmentatioFragmentationn

Oct 21 - Oct 27Oct 21 - Oct 27 124124XeXe 112112Sn, Sn, 108108SnSn CoulexCoulex

2004 /2 weeks/2004 /2 weeks/

May 6- May 12May 6- May 12 8686KrKr 6868NiNi Coulex; GDRCoulex; GDR

May 13 May 19May 13 May 19 8686KrKr 54,56,5854,56,58CrCr CoulexCoulex

Two-step FragmentationTwo-step Fragmentation Highest yield when intermediate fragment is Highest yield when intermediate fragment is 1 or 2 1 or 2

nucleons awaynucleons away from final fragment of interest from final fragment of interest Expect to populate a few states Expect to populate a few states near ground state spinnear ground state spin

((yrastyrast or or non-yrastnon-yrast?)?) Mirror nuclei produced by “mirrored” intermediate Mirror nuclei produced by “mirrored” intermediate

fragments in “mirrored” reactions…fragments in “mirrored” reactions…

5×108 s-155Ni27

55Co2858Ni

53Ni25

53Mn28

52Co25

52Mn27

44V21

44Sc23

etc.

28

27 25

28

25

27 23

21

Neutron richNeutron rich

Proton richProton rich

Primary targetPrimary target Secondary targetSecondary target

2n p2n 5p6n

2p 2pn 6p5n

4×105 s-1 5000 s-1

RIB intensity

Nuclei of interest (e.g. 53Ni) produced via two-step fragmentation of 58Ni(RISING exp., M.A. Bentley et al.., October 2003 (on-line spectra)

Evidence of Mirror State Population – G. Hammond, Zakopane2004

5454Ni recently seen with Ni recently seen with EUROBALL (A. Gadea EUROBALL (A. Gadea et. al.et. al.))

States populated by particle States populated by particle alignmentsalignments

Positive & negative energy Positive & negative energy differencesdifferences

More evidence of “More evidence of “JJ=2 anomaly”=2 anomaly”

A. Gadea A. Gadea et. al.et. al. (p.c.) (p.c.)

99Be(Be(5555Ni,n)Ni,n)5454NiNi

99Be(Be(5555Co,p)Co,p)5454FeFe

1131 keV 2+ - 0+

1408 keV 4+ - 2+

1227 keV 2+ - 0+

1392 keV 4+ - 2+

http://www.lnl.infn.it/~annrep/read_an/2003/http://www.lnl.infn.it/~annrep/read_an/2003/contrib_2003/pdfs/A113TTS.pdfcontrib_2003/pdfs/A113TTS.pdf

LNL Annual Report 2003

New Shell Structure at N>>Z New Shell Structure at N>>Z Relativistic Coulex in N=28-34, N=40-50 Relativistic Coulex in N=28-34, N=40-50

NucleiNuclei

M.Honma et al, Phys. Rev. C65(2002)061301

E.Caurier et al, Eur.Phys.J. A 15, 145 (2002)

56Cr

58Cr

Preliminary

A. Bürger, A. Bürger, Zakopane 2004Zakopane 2004

Future improvements:MINIBALL at RISING

MINIBALL-Cluster detector

• 3 encapsulated, 6-fold segmented Ge detectors• digital electronics: XIA – DGF cards• pulse shape analysis

8 detectors around the target

Stopped beam campaign: setup for g-factor measurement

GSI, DarmstadtGSI, Darmstadt

H.-J. Wollersheim A. Banu, T. Beck, F. Becker, H.-J. Wollersheim A. Banu, T. Beck, F. Becker, P. BednarczykP. Bednarczyk, , PP..Doornenbal, J. Gerl, M. GDoornenbal, J. Gerl, M. Góórska, rska, J. GrJ. Gręęboszbosz, M. Hellstr, M. Hellströöm, m, I.Kojouharov, N. Kurz, R. Lozeva, S. Mandal, S. Muralithar, I.Kojouharov, N. Kurz, R. Lozeva, S. Mandal, S. Muralithar, W.ProkopowiczW.Prokopowicz, N. Saito, T.R. Saito, H. Schaffner, C. Wheldon, N. Saito, T.R. Saito, H. Schaffner, C. Wheldon

IFJ PAN, KrakówIFJ PAN, Kraków

A. A. MajMaj, , J. Styczeń, P. Bednarczyk, J. Grębosz, M. J. Styczeń, P. Bednarczyk, J. Grębosz, M. Kmiecik, M. Ziębliński, W. MęczyńskiKmiecik, M. Ziębliński, W. Męczyński,,

IF UJ, KrakówIF UJ, KrakówR. Kulessa, W. ProkopowiczR. Kulessa, W. Prokopowicz

UW Warszawa UW Warszawa (T. Rząca-Urban, M. Palacz) IPJ, Świerk IPJ, Świerk (M. Moszyński)