New band structures and an unpaired crossing in 78Kr
Creators
- 1. Department of Physics, Florida State University, Tallahassee, Florida 32306 (United States)
- 2. Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556 (United States)
- 3. Department of Chemistry, Washington University, St. Louis, Missouri 63130 (United States)
- 4. Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
- 5. Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- 6. Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, Pennsylvania 15260 (United States)
- 7. Department of Mathematical Physics, Lund Institute of Technology, S-22100 Lund (Sweden)
Description
High-spin states in 78Kr were studied using the 58Ni(23Na,3p) reaction at 70 MeV and the 58Ni(28Si,α4p) reaction at 130 MeV. Prompt γ-γ coincidences were measured using the Pitt-FSU detector array and the GAMMASPHERE-MICROBALL array. Results from these experiments have led to 26 new excitation levels, some of which have been grouped into 3 new bands. Spins were assigned based on directional correlations of oriented nuclei. Two of the new negative-parity bands appear to form a signature-partner pair based on a two-quasineutron structure, in contrast to the previously known two-quasiproton negative-parity bands. A forking has been observed at the 24+ state in the yrast band, which calculations suggest may result from an unpaired crossing. The available evidence suggests oblate shapes in the yrast band coexist with prolate shapes in the negative-parity bands. copyright 1999 The American Physical Society
Additional details
Publishing Information
- Journal Title
- Physical Review. C, Nuclear Physics
- Journal Volume
- 59
- Journal Issue
- 2
- Journal Page Range
- p. 655-664
- ISSN
- 0556-2813
- CODEN
- PRVCAN
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 30021534
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS; S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- GAMMA SPECTRA; HIGH SPIN STATES; KRYPTON 78; NICKEL 58 TARGET; SILICON 28; SODIUM 23; SPIN; YRAST STATES
- Descriptors DEC
- ANGULAR MOMENTUM; ENERGY LEVELS; EVEN-EVEN NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; KRYPTON ISOTOPES; LIGHT NUCLEI; NUCLEI; ODD-EVEN NUCLEI; PARTICLE PROPERTIES; SILICON ISOTOPES; SODIUM ISOTOPES; SPECTRA; STABLE ISOTOPES; TARGETS