Author/Authors :
Sakai، نويسنده , , K. and Sato، نويسنده , , H. and Yoshimi، نويسنده , , A. and Asahi، نويسنده , , K. and Masuda، نويسنده , , Y. and Muto، نويسنده , , S. and Ishimoto، نويسنده , , S. and Morimoto، نويسنده , , K. and Masaike، نويسنده , , Frank A. and Iinuma، نويسنده , , M. and Matsuda، نويسنده , , Y. and Okumura، نويسنده , , K. and Haseyama، نويسنده , , T.، نويسنده ,
Abstract :
For use as a spin analyzer for low energy neutrons, a polarized 3He gas system was developed at KEK. The polarization attained of 3He at 3 atm determined as PHe = 40%, through the measurement of the transmission of unpolarized neutrons through the 3He cell. The 3He cell was used in the measurement of P-violating spin rotation of neutrons in the 0.734 eV p-wave resonance of the 139La+n system. As a result, a parity mixing matrix element xW = 1.04 ± 0.40meV was obtained, which is in agreement with the s- and p-wave resonance mixing model. An attempt is under way to improve the performance of the spin analyzer, by increasing the 3He pressure and incorporating high-power diode lasers. So far we have obtained PHe = 12% at 20 atm.
