TY - JOUR
T1 - Polarized lanthanum target for the t-violation search in slow neutron transmission
AU - Ishizaki, Kohei
AU - Shimizu, Hirohiko M.
AU - Kitaguchi, Masaaki
AU - Matsushita, Taku
AU - Iinuma, Masataka
AU - Kohri, Hideki
AU - Yoshikawa, Hiromoto
AU - Yosoi, Masaru
AU - Shima, Tatsushi
AU - Iwata, Takahiro
AU - Miyachi, Yoshiyuki
AU - Ishimoto, Shigeru
AU - Fujita, Masaki
AU - Ikeda, Yoichi
N1 - Funding Information:
We thank to Dr. H. Mino for the ESR measurement, and Dr. H. Taniguchi for the annealing process. The studies on the target material were supported by Tohoku University IMR cooperative program(proposal No. 18G0034, 19K0081, and 19G0037) and JSPS KAKENHI Grant Number JP17H02889. The study of the DNP technique was supported by the RCNP project “Development of polarized target for new physics search via T-violation” and KEK Neutron Science Division S-type program number 2018S12.
Publisher Copyright:
© Owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2019
Y1 - 2019
N2 - The Nd3+ doped LaAlO3 crystal is a good candidate of a polarized 139La target for the search of the P-odd and T-odd interaction in the low-energy neutron absorption of 139La. As the first step for realizing the polarized 139La target, we grow the undoped LaAlO3 crystal and the La1−xNdxAlO3 (x = 5 ×10−4) crystal by floating-zone method with four halogen lamps. The ESR measurements of Nd3+ in the latter crystal indicated that the linewidth was about 6 gauss, whose value is the same as the crystal in which 50 % 139La polarization was achieved in the previous DNP experiment. As the result, the crystals grown by this method can be applicable to the target study for the T-violation search.
AB - The Nd3+ doped LaAlO3 crystal is a good candidate of a polarized 139La target for the search of the P-odd and T-odd interaction in the low-energy neutron absorption of 139La. As the first step for realizing the polarized 139La target, we grow the undoped LaAlO3 crystal and the La1−xNdxAlO3 (x = 5 ×10−4) crystal by floating-zone method with four halogen lamps. The ESR measurements of Nd3+ in the latter crystal indicated that the linewidth was about 6 gauss, whose value is the same as the crystal in which 50 % 139La polarization was achieved in the previous DNP experiment. As the result, the crystals grown by this method can be applicable to the target study for the T-violation search.
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M3 - Conference article
AN - SCOPUS:85093847328
SN - 1824-8039
VL - 379
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 18th International Workshop on Polarized Sources, Targets, and Polarimetry, PSTP 2019
Y2 - 23 September 2019 through 27 September 2019
ER -