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

被引：15

作者：

Sumikama, T. ^{[1
,2
]}

Matsuta, K. ^{[1
]}

Nagatomo, T. ^{[3
]}

Ogura, M. ^{[1
]}

Iwakoshi, T. ^{[1
]}

Nakashima, Y. ^{[1
]}

Fujiwara, H. ^{[1
]}

Fukuda, M. ^{[1
]}

Mihara, M. ^{[1
]}

Minamisono, K. ^{[4
]}

Yamaguchi, T. ^{[5
]}

Minamisono, T. ^{[6
]}

机构：

[1] Osaka Univ, Dept Phys, Osaka 5600043, Japan

[2] Tokyo Univ Sci, Fac Sci & Technol, Dept Phys, Chiba 2788510, Japan

[3] Int Christian Univ, Dept Chem, Tokyo 1818585, Japan

[4] Michigan State Univ, Natl Superconducting Cyclotron Lab, E Lansing, MI 48824 USA

[5] Saitama Univ, Dept Phys, Saitama 3388570, Japan

[6] Fukui Univ Technol, Fukui 9108505, Japan

来源：

PHYSICAL REVIEW C | 2011年 / 83卷 / 06期

基金：

日本学术振兴会;

关键词：

INDUCED WEAK CURRENTS; 2ND-CLASS CURRENTS; RADIATIVE DECAYS; MEV STATES; SPECTRA; LI-8;

D O I：

10.1103/PhysRevC.83.065501

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The beta-ray angular correlations for the spin alignments of Li-8 and B-8 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.

引用

页数：13

共 6 条

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