The temperature dependence of the polarization of 3He atoms in an internal target cell has been studied. Metastable optically pumped polarized 3He atoms with typical polarization values of 40% were injected into a thin-walled aluminum cell of 40 cm length and a 29.0 × 9.8 mm2 elliptical cross-section. The cell temperature was varied between 5 and 85 K. The polarization inside the target cell was measured via an asymmetry in the 3He→ (d,p)4He reaction at a deuteron energy of 4 MeV. An exponential decrease of the polarization was found for temperatures less than 15 K. For a temperature of ∼6 K a polarization consistent with zero was measured.
|Number of pages
|Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
|Published - Apr 21 1997
Bibliographical noteFunding Information:
We would like to thank Jim Kelsey and Jack Richards for their technicals upport during the design and the installationo f this experimentT. his work is supportedin part by the National Science Foundation, Grant PHY94-20470a nd by the United StatesD epartmento f Energy under cooperativea greementN o. DE-FC02-94ER40818.
ASJC Scopus subject areas
- Nuclear and High Energy Physics