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Title: {beta} decay of {sup 40,42}S and {sup 43}Cl

Abstract

Results from the study of the {beta} decays of {sup 40,42}S and {sup 43}Cl, produced in the fragmentation of a 70-MeV/nucleon {sup 48}Ca beam, are presented. The half-lives for {sup 42}S and {sup 43}Cl have been measured to be 1.03{+-}0.03 s and 3.13{+-}0.09 s, respectively. On the basis of {gamma}-ray singles and {gamma}{gamma} coincidence data, decay schemes for each of these decays have been established. Only subtle changes in low-energy nuclear structure, including switching of the order of the 2{sup -} and 3{sup -} states in the odd-odd Cl isotopes, were observed when passing the midpoint of the {nu}f{sub 7/2} subshell. These results agree well with previous shell-model calculations using restricted model spaces suggesting that deformation and shell-breaking effects in the midshell region are small. However, excitations across the N=20 shell gap are important to explain the low-lying positive parity states.

Authors:
 [1];  [2];  [3];  [4]
  1. Department of Physics and Astronomy, Mississippi State University, Mississippi State, Mississippi 39762 (United States)
  2. Department of Chemistry, Michigan State University, East Lansing, Michigan 48824 (United States)
  3. (United States)
  4. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
Publication Date:
OSTI Identifier:
20771444
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 73; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevC.73.044318; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; CALCIUM 48; CHLORINE 43; EXCITATION; GAMMA RADIATION; HALF-LIFE; MEV RANGE; NITROGEN 20; NUCLEAR DEFORMATION; NUCLEAR FRAGMENTATION; NUCLEAR STRUCTURE; NUCLEONS; PARITY; SHELL MODELS

Citation Formats

Winger, J.A., Mantica, P.F., National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, and Ronningen, R.M.. {beta} decay of {sup 40,42}S and {sup 43}Cl. United States: N. p., 2006. Web. doi:10.1103/PhysRevC.73.044318.
Winger, J.A., Mantica, P.F., National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, & Ronningen, R.M.. {beta} decay of {sup 40,42}S and {sup 43}Cl. United States. doi:10.1103/PhysRevC.73.044318.
Winger, J.A., Mantica, P.F., National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, and Ronningen, R.M.. Sat . "{beta} decay of {sup 40,42}S and {sup 43}Cl". United States. doi:10.1103/PhysRevC.73.044318.
@article{osti_20771444,
title = {{beta} decay of {sup 40,42}S and {sup 43}Cl},
author = {Winger, J.A. and Mantica, P.F. and National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 and Ronningen, R.M.},
abstractNote = {Results from the study of the {beta} decays of {sup 40,42}S and {sup 43}Cl, produced in the fragmentation of a 70-MeV/nucleon {sup 48}Ca beam, are presented. The half-lives for {sup 42}S and {sup 43}Cl have been measured to be 1.03{+-}0.03 s and 3.13{+-}0.09 s, respectively. On the basis of {gamma}-ray singles and {gamma}{gamma} coincidence data, decay schemes for each of these decays have been established. Only subtle changes in low-energy nuclear structure, including switching of the order of the 2{sup -} and 3{sup -} states in the odd-odd Cl isotopes, were observed when passing the midpoint of the {nu}f{sub 7/2} subshell. These results agree well with previous shell-model calculations using restricted model spaces suggesting that deformation and shell-breaking effects in the midshell region are small. However, excitations across the N=20 shell gap are important to explain the low-lying positive parity states.},
doi = {10.1103/PhysRevC.73.044318},
journal = {Physical Review. C, Nuclear Physics},
number = 4,
volume = 73,
place = {United States},
year = {Sat Apr 15 00:00:00 EDT 2006},
month = {Sat Apr 15 00:00:00 EDT 2006}
}