Direct Comparison of the B12 and N12 Beta Spectra

Neel W. Glass and Robert W. Peterson
Phys. Rev. 130, 299 – Published 1 April 1963
PDFExport Citation

Abstract

An experimental direct comparison of the shapes of the B12 and N13 beta decay spectra was made as a test of the validity of the conserved vector current theory (CVCT). The comparison was made at corresponding momentum points normalized to the end-point momenta of the spectra using a 5-channel 180° magnetic spectrometer. The comparative shape factor was measured to have an energy dependence of 1.62±0.28% per MeV, to be compared with a predicted value of 1.10±0.17% per MeV on the basis of the CVCT. The measured end-point energy of the N12 ground-state spectrum is 16.384±0.015 MeV. The comparison of the spectra also yielded a value of 2.2±0.6% for the branching fraction of the N12 decay to the 7.6-MeV level of C12, 0.85±0.6% for the fraction to the 10.1-MeV level, and an indication of a branch to one or more levels around 12 MeV.

  • Received 26 November 1962

DOI:https://doi.org/10.1103/PhysRev.130.299

©1963 American Physical Society

Authors & Affiliations

Neel W. Glass and Robert W. Peterson

  • Los Alamos Scientific Laboratory, University of California, Los Alamos, New Mexico

References (Subscription Required)

Click to Expand
Issue

Vol. 130, Iss. 1 — April 1963

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Journals Archive

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×