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Title: Alpha-Particle Angular Distributions of At and Rn Isotopes and Their Relation to Nuclear Structure

We report on an extensive on-line nuclear orientation study of the angular distribution of {alpha} particles emitted in the favored decay of neutron deficient At and Rn nuclei near the {ital N}=126 shell closure. Surprisingly large anisotropies were observed, showing pronounced changes from one isotope to another. Comparing these data with several theoretical models shows that anisotropic {alpha} emission in favored decays from near-spherical nuclei can well be explained within the shell model, implying that it is mainly determined by the structure of the decaying nucleus. {copyright} {ital 1996 The American Physical Society.}
Authors:
Publication Date:
OSTI Identifier:
399874
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 77; Journal Issue: 23; Other Information: PBD: Dec 1996
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ASTATINE ISOTOPES; ALPHA DECAY; RADON ISOTOPES; ALPHA PARTICLES; ANGULAR DISTRIBUTION; NUCLEAR STRUCTURE; ORIENTATION; NEUTRON-DEFICIENT ISOTOPES; ANISOTROPY; SHELL MODELS