IBM2 study on band crossing in the Ba region
- 1. Departament of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033 (Japan)
- 2. Institut fuer Kernphysik der Universitaet zu Koeln, D-50937 Koeln (Germany)
- 3. Faculty of Informatics, Kansai University, Ryozenji, Takatsuki 569-1095 (Japan)
- 4. House of Councilors, Chiyoda-ku, Tokyo 100-8962 (Japan)
Description
The band crossing in the Ba region is studied in the interacting boson model 2 (IBM2) in which two neutrons and two protons are coupled to a boson core. Energy levels, E2 branching ratios and g-factors of the band-crossing states are analyzed. An interesting feature is the three-band mixing in 128 Ba, which is reasonably explained by the mixing of the pure-boson band, the boson + neutron pair band, and the boson + proton pair band. In the analysis of 132 Ba, the isomeric 10+ state is well described. The consistency of the boson-fermion interaction is systematically investigated over even-even and odd-A isotopes in the region. For example, it turns out that the same quadrupole interaction between the odd neutron hole and bosons can account for the negative-parity states in 131 Ba and the high-spin states in 132 Ba. (authors)
Availability note (English)
Available from author(s) or Documentation Office, Horia Hulubei Institute of Physics and Nuclear Engineering, PO Box MG-6, RO-76900 Bucharest (RO)Additional details
Publishing Information
- Publisher
- IFIN-HH
- Imprint Place
- Bucharest (Romania)
- Imprint Title
- ADVANCES IN NUCLEAR PHYSICS. International Symposium Dedicated to the 50th Anniversary of Institutional Physics Research in Romania. Abstracts of invited talks, oral contributions and posters
- Imprint Pagination
- 113 p.
- Journal Page Range
- p. 37
Conference
- Title
- Advanced in nuclear physics. International symposium dedicated to the 50th anniversary of Institutional Physics Research in Romania
- Dates
- 9-10 Dec 1999
- Place
- Bucharest (Romania)
INIS
- Country of Publication
- Romania
- Country of Input or Organization
- Romania
- INIS RN
- 31010984
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Conference, Non-conventional Literature
- Descriptors DEI
- BARIUM 128; BARIUM 131; BARIUM 132; E2-TRANSITIONS; ENERGY LEVELS; GYROMAGNETIC RATIO; INTERACTING BOSON MODEL; ISOMERIC TRANSITIONS
- Descriptors DEC
- ALKALINE EARTH ISOTOPES; BARIUM ISOTOPES; BETA DECAY RADIOISOTOPES; DAYS LIVING RADIOISOTOPES; ELECTRON CAPTURE RADIOISOTOPES; ENERGY-LEVEL TRANSITIONS; EVEN-EVEN NUCLEI; EVEN-ODD NUCLEI; INTERMEDIATE MASS NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MATHEMATICAL MODELS; MINUTES LIVING RADIOISOTOPES; MULTIPOLE TRANSITIONS; NUCLEAR MODELS; NUCLEI; RADIOISOTOPES; SHELL MODELS; STABLE ISOTOPES
Optional Information
- Notes
- Short communication. 1 fig.