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.
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms|
|Publication status||Published - 2000 Aug|
ASJC Scopus subject areas
- Nuclear and High Energy Physics