Eur. Phys. J. A (2005) 25: 709-710
https://doi.org/10.1140/epjad/i2005-06-075-3

ENAM 2004

Alignment correlation term in mass A = 8 system and G-parity irregular term

¹ Department of Physics, Osaka University, Osaka 560-0043, Toyonaka, Japan
² TRIUMF, 4004 Wesbrook Mall, BC, V6T 2A3, Vancouver, Canada
³ Department of Physics, Saitama University, Saitama 338-8570, Japan

^* e-mail: sumikama@riken.jp.

Received: 8 November 2004
Accepted: 22 February 2005
Published online: 3 May 2005

Abstract

The pure nuclear spin alignments of ⁸Li and ⁸B were produced from the nuclear spin polarization applying the β-NMR method. The alignment correlation terms in the β-ray angular distribution of the mirror pair ⁸Li and ⁸B were observed to limit the G parity irregular term in the weak nuclear current. The significant deviation due to the forbidden matrix elements between the alignment correlation terms and the β-α correlation terms was observed. The determination of the alignment correlation terms was essential to extract the G-parity violating induced tensor term without the influence of the forbidden term in the vector current.