Classification of beta- and gamma-ray transitions between intrinsic states in deformed even-mass nuclei

Journal Article · Sun May 01 04:00:00 EDT 1960 · Nuclear Physics

DOI:https://doi.org/10.1016/S0029-5582(60)81033-4· OSTI ID:4179891

Gallagher, C. J.

The description of intrinsic states of deformed evenmass nuclei by the product wave functions of the strong coupling model, using Nilsson wave functions to describe the intrinsic particle configurations, is shown to lead to selection rules which depend on the coupling between the last two particles. In the case in which the coupling in the final and initial states is the same, the description leads, in the asymptotic limit of the Nilsson wave functions, to selection rules similar to those proposed earlier for oddmass nuclei. For nuclear states with different relative couplings the selection rules lead most frequently to Kforbiddenness. It is shown that, if the non-transforming particle in the two-particle product wave function is not the same in the final and initial states, the resulting twoparticle transition is formally forbidden. The experimental transition rates in even-mass nuclei to which definite configurations can be assigned are observed to fall within well-defined ranges characteristic of the degree of forbiddenness predicted by the selection rules. The data on log ft-values indicate that single-particle transitions occur with essentially the same speed whether the transforming particle is in an odd-mass or an even-mass nucleus.

• Research Organization: Univ. of Copenhagen
• Sponsoring Organization: USDOE
• NSA Number: NSA-14-017374
• OSTI ID: 4179891
• Journal Information: Nuclear Physics, Journal Name: Nuclear Physics Journal Issue: 2 Vol. 16; ISSN 0029-5582
• Publisher: Elsevier
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
CONFIGURATION
DEFORMATION
ENERGY LEVELS
GAMMA RADIATION
INTERACTIONS
MATHEMATICS
NILSSON MODEL
NUCLEAR MODELS
NUCLEAR THEORY
NUCLEI
NUCLEONS
QUANTUM MECHANICS