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Analog E 1 transitions and isospin mixing

Analog E 1 transitions and isospin mixing We investigate whether isospin mixing can be determined in a model-independent way from the relative strength of E 1 transitions in mirror nuclei. The specific examples considered are the A = 31 and A = 35 mirror pairs, where a serious discrepancy between the strengths of 7 / 2 - → 5 / 2 + transitions in the respective mirror nuclei has been observed. A theoretical analysis of the problem suggests that it ought to be possible to disentangle the isospin mixing in the initial and final states given sufficient information on experimental matrix elements. With this in mind, we obtain a lifetime for the relevant 7 / 2 - state in S 31 using the Doppler-shift attenuation method. We then collate the available information on matrix elements to examine the level of isospin mixing for both A = 31 and A = 35 mirror pairs. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review C American Physical Society (APS)

Analog E 1 transitions and isospin mixing

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References (4)

Publisher
American Physical Society (APS)
Copyright
Copyright © 2008 The American Physical Society
ISSN
1089-490X
DOI
10.1103/PhysRevC.78.024301
Publisher site
See Article on Publisher Site

Abstract

We investigate whether isospin mixing can be determined in a model-independent way from the relative strength of E 1 transitions in mirror nuclei. The specific examples considered are the A = 31 and A = 35 mirror pairs, where a serious discrepancy between the strengths of 7 / 2 - → 5 / 2 + transitions in the respective mirror nuclei has been observed. A theoretical analysis of the problem suggests that it ought to be possible to disentangle the isospin mixing in the initial and final states given sufficient information on experimental matrix elements. With this in mind, we obtain a lifetime for the relevant 7 / 2 - state in S 31 using the Doppler-shift attenuation method. We then collate the available information on matrix elements to examine the level of isospin mixing for both A = 31 and A = 35 mirror pairs.

Journal

Physical Review CAmerican Physical Society (APS)

Published: Aug 1, 2008

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