Test of the conserved vector current hypothesis by a {beta}-ray angular distribution measurement in the mass-8 system

Journal Article · Wed Jun 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.065501· OSTI ID:21502819

Sumikama, T ^[1]; Matsuta, K; Ogura, M; Iwakoshi, T; Nakashima, Y; Fujiwara, H; Fukuda, M; Mihara, M ^[1]; Nagatomo, T ^[2]; Minamisono, K ^[3]; Yamaguchi, T ^[4]; Minamisono, T ^[5]

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1. Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043 (Japan)
2. Department of Chemistry, International Christian University, Mitaka, Tokyo 181-8585 (Japan)
3. National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824 (United States)
4. Department of Physics, Saitama University, Saitama 338-8570 (Japan)
5. Fukui University of Technology, 3-6-1 Gakuen, Fukui 910-8505 (Japan)

The {beta}-ray angular correlations for the spin alignments of {sup 8}Li and {sup 8}B have been observed in order to test the conserved vector current (CVC) hypothesis. The alignment correlation terms were combined with the known {beta}-{alpha} angular correlation terms to determine all the matrix elements contributing to the correlation terms. The weak magnetism term, 7.5{+-}0.2, deduced from the {beta}-ray correlation terms was consistent with the CVC prediction 7.3{+-}0.2, deduced from the analog-{gamma} decay measurement based on the CVC hypothesis. However, there was no consistent CVC prediction for the second-forbidden term associated with the weak vector current. The experimental value for the second-forbidden term was 1.0{+-}0.3, while the CVC prediction was 0.1{+-}0.4 or 2.1{+-}0.5.

• OSTI ID: 21502819
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 6; Other Information: DOI: 10.1103/PhysRevC.83.065501; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR CORRELATION
ANGULAR DISTRIBUTION
BORON 8
FORECASTING
GAMMA DECAY
HYPOTHESIS
LITHIUM 8
MAGNETISM
MASS
MATRIX ELEMENTS
SIMULATION
SPIN
VECTOR CURRENTS
ALGEBRAIC CURRENTS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON ISOTOPES
CORRELATIONS
CURRENTS
DECAY
DISTRIBUTION
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MILLISECONDS LIVING RADIOISOTOPES
NUCLEAR DECAY
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES