Type of Work

Article

Date

8-1-1995

Journal Title

Physical Review C

Journal ISSN

0556-2813

Journal Volume

52

Journal Issue

2

First Page

R464

Last Page

R467

DOI

10.1103/PhysRevC.52.R464

Abstract

We have produced very large nuclear alignments in radioactive K-36 (half-life 0.34 sec) through laser optical pumping techniques. The K-36 was created through (p,n) reactions using a 50 nA, 22 MeV proton beam, and a 3.3 atmosphere Ar-36 target. Measurements were made with the target cell at room temperature, when direct optical pumping produces nuclear orientation in the K-36, and at elevated temperatures 160 degrees C and 180 degrees C) where the K-36 is oriented through a combination of direct optical pumping and spin exchange. The fraction of the maximal nuclear alignment for the 180 degrees C data was determined to be 0.46+/-0.07 stat+/-0.05 syst through measurements of the gamma-ray anisotropy following positron decay. Roughly 10(5) or more decays of oriented K-36 occurred each second. The application of the superallowed decay of K-36 to measurements of time-reversal symmetry in beta decay is discussed.

Notes

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

Physical Review C, vol. 52, no. 2 (1995): R464–R467. doi: 10.1103/PhysRevC.52.R464.

Hamilton Areas of Study

Physics