Shape coexistence effects and quasiparticle alignment in /sup 81/Sr
Creators
- 1. Department of Physics, Florida State University, Tallahassee, Florida 32306
Description
High spin states in /sup 81/Sr were investigated in the reactions /sup 56/Fe(/sup 28/Si,2pn) at 103.6 MeV and /sup 55/Mn(/sup 29/Si,p2n) at 95.2 MeV using the techniques of in-beam γ-ray spectroscopy. Measurements were made of γ-γ coincidences and γ-ray directional correlations from oriented nuclei. The lifetimes of 12 states and lifetime limits of 10 others were determined with the Doppler shift attenuation method. The data have been analyzed in terms of the Woods-Saxon cranking model. The first crossing observed in the yrast band is attributed to the alignment of a pair of g/sub 9/2/ protons. The irregularities observed in the J/sup (2)/ moment of inertia in the K/sup π/ = (5/2- and 1/2/sup (+)/ bands are interpreted as evidence for the alignment of a g/sub 9/2/ proton pair as well. The coexistence of prolate and oblate configurations at low spin is discussed in terms of the polarization of the soft even-even core by the odd neutron
Additional details
Publishing Information
- Journal Title
- Phys. Rev., C
- Journal Volume
- 38
- Journal Issue
- 2
- Series
- Phys. Rev., C.
- Journal Page Range
- 696-711
- ISSN
- 0556-2813
- CODEN
- PRVCA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 19098367
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- CRANKING MODEL; GAMMA SPECTROSCOPY; HEAVY ION FUSION REACTIONS; HIGH SPIN STATES; IN-BEAM SPECTROSCOPY; IRON 56 REACTIONS; LIFETIME; MANGANESE 55 REACTIONS; MEV RANGE 10-100; MEV RANGE 100-1000; NEUTRONS; PROTONS; SILICON 28 TARGET; SILICON 29 TARGET; STRONTIUM 81
- Descriptors DEC
- BARYONS; BETA DECAY RADIOISOTOPES; BETA-PLUS DECAY RADIOISOTOPES; CATIONS; CHARGED PARTICLES; ELECTRON CAPTURE RADIOISOTOPES; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY RANGE; EVEN-ODD NUCLEI; FERMIONS; HADRONS; HEAVY ION REACTIONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INTERMEDIATE MASS NUCLEI; IONS; ISOTOPES; MATHEMATICAL MODELS; MEV RANGE; MINUTES LIVING RADIOISOTOPES; NUCLEAR MODELS; NUCLEAR REACTIONS; NUCLEI; NUCLEONS; NUCLEOSYNTHESIS; RADIOISOTOPES; SPECTROSCOPY; STRONTIUM ISOTOPES; SYNTHESIS; TARGETS