Type of Work

Article

Date

5-16-2002

Journal Title

Physics Letters B

Journal ISSN

0370-2693

Journal Volume

534

Journal Issue

1-4

First Page

39

Last Page

44

DOI

10.1016/S0370-2693(02)01720-3

Abstract

The parity nonconserving spin rotation of neutrons in the 0.734-eV p-wave resonance of La-139 was measured with the neutron transmission method. Two optically polarized He-3 cells were used before and behind a 5-cm long La-139 target, each as a polarizer and an analyzer for neutron spin. The rotation angle was carefully measured by flipping the direction of He-3 polarization in the polarizer in sequence. The peak-to-peak value of the spin rotation was determined to be (7.4+/-1.1) x 10(-3) rad/cm. The result is found to be consistent with the previous experiments, but the result was statistically improved. The s-p mixing model gives the weak matrix element as xW = (1.71+/-0.25) meV. The value agrees well with the one deduced from the parity-nonconserving longitudinal asymmetry in the same resonance. (C) 2002 Elsevier Science B.V. All rights reserved.

Notes

This document is the publisher's version of an article published in:

Physical Letters B, vol. 534, no. 1-4 (2002): 39-44. doi: 10.1016/S0370-2693(02)01720-3.

Hamilton Areas of Study

Physics