Shell-model calculations for the energy levels of the /ital N/=50 isotones with /ital A/=80--87

Journal Article · Sat Jul 01 04:00:00 EDT 1989 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.40.389· OSTI ID:6012662

Ji, X; Wildenthal, B H

The detailed features of the calculated energy-level schemes and of thesingle-particle, orbit-occupancy properties of the low-lying levels of the/ital N/=50 isotones /sup 80/Zn, /sup 81/Ga,/sup 82/Ge, /sup 83/As, /sup 84/Se,/sup 85/Br, /sup 86/Kr, and /sup 87/Rb arepresented and discussed. These results are obtained with a new effectiveHamiltonian operator obtained empirically from an iterative fit to experimentalenergies taken from all experimentally studied (/ital A/=82--96)/ital N/=50 nuclei. The model space for the calculations consists ofactive 0/ital f//sub 5/2/, 1/ital p//sub 3/2/,1/ital p//sub 1/2/, and 0/ital g//sub 9/2/ proton orbits relativeto a nominal /sup 78/Ni core. This space is truncated internally byrestricting the number of particles excited from the negative-parity orbitsinto the /ital g//sub 9/2/ orbit to be no greater than four. The typicalstructures predicted for these lighter /ital N/=50 isotones are found tobe dominated by well-mixed combinations of /ital fp/-orbit configurations, withthe /ital g//sub 9/2/ orbit playing a minor role in all but a few specialcases. The model energy-level spectra are compared with existing experimentalinformation, as are calculated spectroscopic factors for single-protonstripping and pickup reactions.

• Research Organization: Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91109(US); Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131
• OSTI ID: 6012662
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 40:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ANGULAR MOMENTUM
ARSENIC 83
ARSENIC ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BROMINE 85
BROMINE ISOTOPES
DIRECT REACTIONS
ENERGY LEVELS
EVEN-EVEN NUCLEI
GALLIUM 81
GALLIUM ISOTOPES
GERMANIUM 82
GERMANIUM ISOTOPES
HAMILTONIANS
INTERMEDIATE MASS NUCLEI
ISOTONIC NUCLEI
ISOTOPES
KRYPTON 86
KRYPTON ISOTOPES
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
MILLISEC LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NICKEL 78
NICKEL ISOTOPES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
PARTICLE-CORE COUPLING MODEL
PICKUP REACTIONS
QUANTUM OPERATORS
RADIOISOTOPES
RUBIDIUM 87
RUBIDIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SELENIUM 84
SELENIUM ISOTOPES
SHELL MODELS
SPECTROSCOPIC FACTORS
SPIN
STABLE ISOTOPES
STRIPPING
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES
ZINC 80
ZINC ISOTOPES