TY  - JOUR
AU  - Montanari, D. et al
AU  - Gadea, A.
PY  - 2011
DA  - 2011//
TI  - Probing the nature of particle-core couplings in Ca-49 with gamma spectroscopy and heavy-ion transfer reactions
T2  - Phys. Lett. B
JO  - Physics Letters B
SP  - 288
EP  - 293
VL  - 697
IS  - 4
PB  - Elsevier Science Bv
KW  - Multi-nucleon transfer
KW  - Gamma spectroscopy
KW  - Magnetic spectrometer
KW  - Particle-core coupling
AB  - Neutron rich nuclei around Ca-48 have been measured with the CLARA-PRISMA setup, making use of Ca-48 on Ni-64 binary reactions, at 5.9 MeV/A. Angular distributions of gamma rays give evidence, in several transfer channels, for a large spin alignment (approximate to 70%) perpendicular to the reaction plane, making it possible to firmly establish spin and parities of the excited states. In the case of Ca-49, states arising from different types of particle-core couplings are, for the first time, unambiguously identified on basis of angular distribution, polarization and lifetime measurements. Shell model and particle-vibration coupling calculations are used to pin down the nature of the states. Evidence is found for the presence, in the same excitation energy region, of two types of coupled states, i.e. single particle coupled to either Ca-48 or Ca-50 simple configurations, and particle-vibration coupled states based on the 3- phonon of Ca-48.
SN  - 0370-2693
UR  - https://doi.org/10.1016/j.physletb.2011.01.046
DO  - 10.1016/j.physletb.2011.01.046
LA  - English
N1  - ISI:000288300400005
ID  - Montanari+Gadea2011
ER  -