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Comparison of the beta spectra of B12 and N12

Mayer-Kuckuk, T. and Michel, F. C. (1962) Comparison of the beta spectra of B12 and N12. Physical Review, 127 (2). pp. 545-554. ISSN 0031-899X. http://resolver.caltech.edu/CaltechAUTHORS:MAYpnas62

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Abstract

The conserved-vector-current (CVC) theory predicts a deviation from the allowed shape of the B12 and N12 beta spectra. The ratio of the shape factors of the two spectra is expected to have an energy dependence of (1.10±0.17)% per MeV. If the CVC hypothesis is not invoked, this ratio is estimated to be an order of magnitude smaller. The two spectra have been measured with a magnetic spectrometer and found to give for this ratio the value (1.30±0.31)% per MeV. The branching fraction of the N12 decay to the 7.6-MeV state of C12 has been determined to be (3.0±0.5)%.


Item Type:Article
Additional Information:©1962 The American Physical Society. Received 12 March 1962. The authors are indebted to Professor T. Lauritsen, Professor C.A. Barnes, Professor W.A. Fowler, Professor H.A. Weidenmuller, Professor U. Hauser, and Professor F. Boehm for valuable discussions. Two earlier experiments in this laboratory(33) by H. Hilton and V. Soergel, and H. Hilton and C. Van der Leun provided much the groundwork which made the present experiment possible. One of us (Mayer-Kuckuk) would like to thank the Deutsches Bundesministerium fur Atolnkernencrgie for financial support and the Kellogg Laboratory for its hospitality. Supported in part by the Joint Program of the Office of Naval Research and the U.S. Atomic Energy Commission.
Record Number:CaltechAUTHORS:MAYpnas62
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:MAYpnas62
Alternative URL:http://dx.doi.org/10.1103/PhysRev.127.545
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:8093
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:30 Jul 2007
Last Modified:26 Dec 2012 09:36

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