ft asymmetry in A = 12 mirror decay to the 12C 4.4 MeV state

doi:10.1016/0375-9474(88)90098-X

Nuclear Physics A

Volume 485, Issue 2, 15 August 1988, Pages 210-220

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Abstract

The ratio of the Gamow-Teller beta-decay branches of ¹²B and ¹²N to the first excited state of ¹²C was measured accurately by means of the off-beam β-γ spectroscopy. The ratio of these branches was obtained as ¹²N/¹²B = 1.528 (27). This gives the mirror asymmetry [(ft)_β⁺/(ft)_β⁻]− 1 = 0.066 (18). The present value together with that for the ground-state decay is discussed in terms of the different radial overlapping.

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Cited by (7)

Energy levels of light nuclei A = 12
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In the first experiment at the newly constructed ISOLDE Facility the first-forbidden beta-decay of ¹⁷Ne into the first excited state of ¹⁷F has been measured. It is a factor two faster than the corresponding mirror decay and thus gives one of the largest recorded asymmetries for beta decays feeding bound final states. Shell-model calculations can only reproduce the asymmetry if the halo structure of the ¹⁷F state is taken into account.
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1992, Nuclear Physics, Section A
Energy levels of light nuclei A = 11-12
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¹: Present address: Nippon Electric Co., Ltd., Yokohama 226, Japan.

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Nuclear Physics A

Abstract

References (13)

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Cited by (7)

Energy levels of light nuclei A = 12

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Energy levels of light nuclei A = 11-12