bogdan fornal institute of nuclear physics, polish academy of sciences, krakow, poland

Bogdan Fornal

Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland

D.Guillemaud-Mueller et al.,Nucl. Phys. A (1984)ISOLDE

A. Huck et al.,Phys. Rev. C (1985)ISOLDE

N=28

N=50

Ca

Ti

Cr

Ar

Fe

Ni

S

N=32

Deep-inelastic reactions as a tool for nuclear spectroscopy

R. Broda et al., Phys.Lett. B 251,245 (1990)

48Ca + 238U (thick target)

48Ca

66Ni

N/Z(208Pb)=1.54

N/Z(64Ni)=1.29

48Ca

208Pb238UN/Z=1.54

N/Z=1.59

N/Z=1.4

N=28

N=50

Ca

48Ca + 238U

Ti

Cr

Ar

Fe

Ni

S

N/Z equilibratio

n

line

N=32

ATLAS & Gammasphere at Argonne NL

48Ca (330 MeV) + 238U (thick)

54

Beta-decay of the 54Sc parent measured at MSU following fragmentation of a Kr beam

Deep-inelastic reaction data48Ca + 208Pb, Gammasphere, Argonne

f7/2 p3/2 p1/2 f5/2

fp shell4 single-particle energies

195 two-body matrix elements (TBME)

40Ca

fp

KB3G interaction:

A. Poves, J. Sanchez- Solano, E. Caurier, F. Nowacki Nucl. Phys. A (2001).

M. Honma, T. Otsuka, B.A. Brown, T. Mizusaki Phys. Rev. C (2002); Eur. Phys. J. A (2004).

GXPF1A interaction:

34

54Ca

34

52Sc

51Ca

CLARA

PRISMA

48Ca (330 MeV) + 238U at LNL Legnaro with PRISMA+CLARA

48Ca

F. Perrot et al., Phys.Rev.C 74, 14313 (2006) ISOLDE

52Sc

f7/2p3/2f5/22

(8+)

51Ca

p3/2f5/2(9/2-) 2

51Ca

53Ti

52Sc

51Ca

f7/2p3/2f5/22

f7/2p3/2f5/22

2

p3/2f5/22

34

T. Otsuka et al. Phys. Rev. Lett (2005)

Tensor interaction VT = (2) Y(2 Z(r)

couples j> and j< orbitals and favors charge exchange processesf7/2 f5/2

40 48 52 ?

Summary

We performed gamma-ray spectroscopic studies of deep-inelastic reaction products by combining the coincidence thick target technique with the CLARA+PRISMA identification method. Such approach turned out to be very successful in locating yrast structures in hard-to-reach neutron-rich nuclei.

By identifying high spin states in 52Sc and 51Ca, we were able to get information on the evolution of the neutron p3/2, p1/2 and f5/2 single particle states down to Z=20. This evolution seems to be consistent with the predicted monopole effect of the tensor force.

Phys. Lett. B 546, 22 (2002) Phys. Rev. C. 70, 064304 (2004)

D. Bazzacco, S. Beghini, L. Corradi, G. de Angelis, F. Della Vedova, E. Farnea, E. Fioretto, A. Gadea, S. M. Lenzi, S.Lunardi, G. Montagnoli, N. Marginean, D. R. Napoli, F. Scarlassara, A. M.Stefanini, S. Szilner, M. Trotta, C. A. Ur

R. Broda, W. Krolas, T. Pawlat, J. Wrzesinski, B.F. IFJ PAN Krakow, Poland

R.V.F. Janssens, S. Zhu, M.P. Carpenter, D. Seweryniak et al. ANL Argonne, USA

P. Mantica, B.A. Brown et al. MSU East Lensing, USA

M. Honma University of Aizu, JapanT. Otsuka University of Tokyo, Japan

PRISMA-CLARA group, Legnaro-Padova