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Isovector M2 state observed in the /sup 14/C(. pi. /sup -/,. gamma. ) reaction

Journal Article · · Phys. Rev. C; (United States)
The photon spectrum of the pion capture reaction /sup 14/C(..pi../sup -/,..gamma..)/sup 14/B was measured with a resolution of 0.9 MeV full width at half maximum. A single strong transition is observed with ..gamma..-ray energy 115.70 +- 0.17 MeV, corresponding to a state in /sup 14/B at 2.15 +- 0.17-MeV excitation. Comparisons with previous experiments and theoretical calculations identify this as the second T = 2,2/sup -/ state in mass-14 nuclei. The single strong transition has a measured branching ratio (11.1 +- 3.0) x 10/sup -4/, which equals one-fifth of the shell-model prediction. The total radiative capture branching ratio is 0.68 +- 0.16%, which is a factor of 2 to 3 smaller than for other 1-p-shell nuclei.
Research Organization:
Los Alamos National Laboratory, University of California, Los Alamos, New Mexico 85745
OSTI ID:
5517695
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 28:2; ISSN PRVCA
Country of Publication:
United States
Language:
English

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