Temperature dependence of 3He polarization in aluminum storage cells
Article
Korsch, W, Carr, RW, DeSchepper, D et al. (1997). Temperature dependence of 3He polarization in aluminum storage cells
. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 389(3), 389-397. 10.1016/S0168-9002(97)00342-2
Korsch, W, Carr, RW, DeSchepper, D et al. (1997). Temperature dependence of 3He polarization in aluminum storage cells
. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 389(3), 389-397. 10.1016/S0168-9002(97)00342-2
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.