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Title: Coulomb shifts and shape changes in the mass 70 region.

Abstract

The technique of recoil {beta} tagging has been developed which allows prompt {gamma} decays in nuclei from excited states to be correlated with electrons from their subsequent short-lived {beta} decay. This technique is ideal for studying nuclei very far from stability and improves in sensitivity for very short-lived decays and for high decay Q-values. The method has allowed excited states in {sup 78}Y to be observed for the first time, as well as an extension in the knowledge of T=1 states in {sup 74}Rb. From this new information it has been possible to compare Coulomb energy differences (CED) between T=1 states in {sup 70}Br/{sup 70}Se, {sup 74}Rb/{sup 74}Kr, and {sup 78}Y/{sup 78}Sr. The A=70 CED exhibit an anomalous behavior which is inconsistent with all other known CED. This behavior may be accounted for qualitatively in terms of small variations in the Coulomb energy arising from shape changes.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
914903
Report Number(s):
ANL/PHY/JA-58223
Journal ID: ISSN 0556-2813; PRVCAN; TRN: US200817%%4
DOE Contract Number:
DE-AC02-06CH11357
Resource Type:
Journal Article
Resource Relation:
Journal Name: Phys. Rev. C; Journal Volume: 75; Journal Issue: 2007
Country of Publication:
United States
Language:
ENGLISH
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; BETA DECAY; GAMMA DECAY; COULOMB ENERGY; EXCITED STATES; YTTRIUM 78; RUBIDIUM 74; BROMINE 70; SELENIUM 70; KRYPTON 74; STRONTIUM 78

Citation Formats

Nara Singh, B. S., Steer, A. N., Jenkins, D. G., Wadsworth, R., Bentley, M. A., Lister, C. J., Physics, Univ. of York, Univ. of Jyvaskyla, and Royal Inst. of Tech.. Coulomb shifts and shape changes in the mass 70 region.. United States: N. p., 2007. Web. doi:10.1103/PhysRevC.75.061301.
Nara Singh, B. S., Steer, A. N., Jenkins, D. G., Wadsworth, R., Bentley, M. A., Lister, C. J., Physics, Univ. of York, Univ. of Jyvaskyla, & Royal Inst. of Tech.. Coulomb shifts and shape changes in the mass 70 region.. United States. doi:10.1103/PhysRevC.75.061301.
Nara Singh, B. S., Steer, A. N., Jenkins, D. G., Wadsworth, R., Bentley, M. A., Lister, C. J., Physics, Univ. of York, Univ. of Jyvaskyla, and Royal Inst. of Tech.. Mon . "Coulomb shifts and shape changes in the mass 70 region.". United States. doi:10.1103/PhysRevC.75.061301.
@article{osti_914903,
title = {Coulomb shifts and shape changes in the mass 70 region.},
author = {Nara Singh, B. S. and Steer, A. N. and Jenkins, D. G. and Wadsworth, R. and Bentley, M. A. and Lister, C. J. and Physics and Univ. of York and Univ. of Jyvaskyla and Royal Inst. of Tech.},
abstractNote = {The technique of recoil {beta} tagging has been developed which allows prompt {gamma} decays in nuclei from excited states to be correlated with electrons from their subsequent short-lived {beta} decay. This technique is ideal for studying nuclei very far from stability and improves in sensitivity for very short-lived decays and for high decay Q-values. The method has allowed excited states in {sup 78}Y to be observed for the first time, as well as an extension in the knowledge of T=1 states in {sup 74}Rb. From this new information it has been possible to compare Coulomb energy differences (CED) between T=1 states in {sup 70}Br/{sup 70}Se, {sup 74}Rb/{sup 74}Kr, and {sup 78}Y/{sup 78}Sr. The A=70 CED exhibit an anomalous behavior which is inconsistent with all other known CED. This behavior may be accounted for qualitatively in terms of small variations in the Coulomb energy arising from shape changes.},
doi = {10.1103/PhysRevC.75.061301},
journal = {Phys. Rev. C},
number = 2007,
volume = 75,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}