Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

DIRECT COMPARISON OF THE B$sup 12$ AND N$sup 12$ BETA SPECTRA

Journal Article · · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D
;
An experimental direct comparison of the shapes of the B/sup 12/ and N/ sup 12/ 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 deg magnetic spectrometer. The comparative shape factor was measured to have an energy dependence of 1.62 plus or minus 0.28% per Mev, to be compared with a predicted value of 1.10 plus or minus 0.17% per Mev on the basis of the CVCT. The measured end-point energy of the N/sup 12/ groundstate spectrum is 16.384 plus or minus 0.015 Mev. The comparison of the spectra also yielded a value of 2.2 plus or minus 0.6% for the branching fraction of the N/sup 12/ decay to the 7.6-Mev level of C/sup 12/ 0.85 plus or minus 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. (auth)
Research Organization:
Los Alamos Scientific Lab., N. Mex.
NSA Number:
NSA-17-017237
OSTI ID:
4721228
Journal Information:
Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 130; ISSN PHRVA
Country of Publication:
Country unknown/Code not available
Language:
English

Similar Records

COMPARISON OF THE BETA SPECTRA OF B$sup 12$ AND N$sup 1$$sup 2$
Journal Article · Sun Jul 15 00:00:00 EDT 1962 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D · OSTI ID:4795666
SOME N$sup 12$ AND B$sup 12$ BETA-DECAY MEASUREMENTS
Journal Article · Sun Mar 31 23:00:00 EST 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D · OSTI ID:4741767
A COMPARISON OF THE BETA SPECTRA OF BORON 12 AND NITROGEN 12: A TEST OF THE CONSERVED VECTOR CURRENT THEORY
Thesis/Dissertation · Mon Dec 31 23:00:00 EST 1962 · OSTI ID:4152481

Related Subjects

BETA DECAY
BORON 12
BRANCHING RATIO
CURRENTS
ENERGY LEVELS
HALF-LIFE
MAGNETIC FIELDS
MEASURED VALUES
MOMENTUM
NITROGEN 12
PHYSICS
SPECTRA
SPECTROMETERS
VECTORS