1. Low-lying isovector 2+ valence-shell excitations of 212Po.
- Author
-
Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Stahl, C., Petkov, P., Blazhev, A., Hennig, A., Astier, A., Braunroth, Th., Cortés, M. L., Dewald, A., Djongolov, M., Fransen, C., Gladnishki, K., Karayonchev, V., Litzinger, J., Müller-Gatermann, C., Scheck, M., and Scholz, Ph.
- Subjects
- *
NUCLEAR shell theory , *EXCITED states , *COULOMB barriers (Nuclear fusion) , *QUASIPARTICLES , *DOPPLER effect , *NEUTRON-proton interactions , *NUCLEAR quadrupole resonance spectroscopy - Abstract
We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of 212Po. This nucleus was studied in an α-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF