Interacting boson-fermion model analysis of beta decay in A = 195 and 197 nuclei
The interacting boson-fermion model is used to analyze beta decay. The beta transition operator in the boson-fermion space is constructed with the parameters obtained from microscopic considerations. The ft values are calculated for the first nonunique forbidden transitions between states based on natural parity orbitals in the decays of /sup 195/Ir..-->../sup 195/Pt, /sup 195/Au..-->../sup 195/Pt, /sup 195/Hg..-->../sup 195/Au, /sup 197/Pt..-->../sup 197/Au, and /sup 197/Hg..-->../sup 197/Au. The structure of the odd-neutron nuclei is described in the U(6)xU(12) boson-fermion symmetry limit. For the odd-proton nuclei, three different approaches, in particular the U(6)xU(4) symmetry, the U(6)xU(20) symmetry, and the perturbed U(6)xU(4) scheme, are compared. The calculated ft values are very sensitive to details of nuclear wave functions, the best results being obtained with the perturbed U(6)xU(4) scheme. Phase ambiguities in nuclear wave functions can be disentangled from beta decay analysis. The exchange terms in the boson-fermion transition operator, which take into account the Pauli principle between the odd-nucleon and nucleons forming the even-even collective core, proved to be quite important.
- Research Organization:
- Institute of Nuclear Physics, Czechoslovak Academy of Sciences, 250 68 R-italic-hacekez-italic-hacek, Czechoslovakia
- OSTI ID:
- 5122394
- Journal Information:
- Phys. Rev. C; (United States), Vol. 37:5
- Country of Publication:
- United States
- Language:
- English
Similar Records
In-beam gamma-ray spectroscopy of states in /sup 197/Au and /sup 199/Au populated by the (t,2n) reaction
Cross sections for the formation of {sup 195}Hg{sup m,g}, {sup 197}Hg{sup m,g}, and {sup 196}Au{sup m,g} in {alpha} and {sup 3}He-particle induced reactions on Pt: Effect of level density parameters on the calculated isomeric cross-section ratio
Related Subjects
BETA DECAY
INTERACTING BOSON MODEL
GOLD 195
IRIDIUM 195
MERCURY 195
MERCURY 197
PLATINUM 197
FORBIDDEN TRANSITIONS
FORM FACTORS
FT VALUE
GOLD 197
MATRIX ELEMENTS
NUCLEAR STRUCTURE
PAULI PRINCIPLE
PLATINUM 195
SELECTION RULES
SHELL MODELS
SPIN
U GROUPS
WAVE FUNCTIONS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
DAYS LIVING RADIOISOTOPES
DECAY
ELECTRON CAPTURE RADIOISOTOPES
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FUNCTIONS
GOLD ISOTOPES
HEAVY NUCLEI
HOURS LIVING RADIOISOTOPES
INTERNAL CONVERSION RADIOISOTOPES
IRIDIUM ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LIE GROUPS
MATHEMATICAL MODELS
MERCURY ISOTOPES
NUCLEAR MODELS
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PLATINUM ISOTOPES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
STABLE ISOTOPES
SYMMETRY GROUPS
653001* - Nuclear Theory- Nuclear Structure
Moments
Spin
& Models
653005 - Nuclear Theory- Radioactive Decay