Measurement of positron spin polarization by using the Doppler broadening method

Yasuyoshi Nagai, Yasuyuki Nagashima, Jaehong Kim, Yoshiko Itoh, Toshio Hyodo

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A new positron spin polarimeter based on the measurement of the Doppler broadening of annihilation radiation is described. The polarization is determined from the magnetic field dependence of the S-parameter of the Doppler broadening spectra for amorphous SiO2. In order to examine the sensitivity of this polarimeter, the spin polarization of the positrons from a 22Na source is measured and compared with the value theoretically expected. The result is also compared with the polarization measured by using the angular correlation of annihilation radiation method.

Original languageEnglish
Pages (from-to)199-203
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume171
Issue number1
DOIs
Publication statusPublished - 2000 Aug

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

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