Polarized proton spin filter for epithermal neutrons based on dynamic nuclear polarization using photo-excited triplet electron spins

Shusuke Takada, Kenichiro Tateishi, Yasuo Wakabayashi, Yoshimasa Ikeda, Tamaki Yoshioka, Yoshie Otake, Tomohiro Uesaka

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

To polarize neutrons with energy beyond 0.1 eV, we developed a novel polarized proton spin filter based on dynamic nuclear polarization using photo-excited triplet electron spins. The spin filter consists of a single crystal of naphthalene doped with deuterated pentacene and has a size of $\varnothing15\times4 \, {rm mm}3, allowing it to cover a wide beam diameter. It was operated in 0.35 T and at 90 K. We succeeded in polarizing neutrons in the energy range 0.1-10 eV using a RIKEN accelerator-driven compact neutron source. The averaged values of the proton and neutron polarization were $0.250\pm0.050$ and $0.076\pm0.015$, respectively.

Original languageEnglish
Article number123G01
JournalProgress of Theoretical and Experimental Physics
Volume2020
Issue number12
DOIs
Publication statusPublished - Dec 1 2020

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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