A Comparison of He-3 Polarization Determined by Neutron Scattering and NMR Methods

作者：Chang L J^*; Lee Chih Hao; Su Hui Chia; Ioffe A; Bussmann K; Parnell S R; Boag S

来源：Chinese Journal of Physics, 2009, 47(2): 159-165.

He-3 was polarized by the spin-exchange optical pumping (SEOP) method. The He-3 polarization measured by neutrons was compared to the value obtained by cross calibration with a thermal water signal via nuclear magnetic resonance (NMR). The neutron scattering experiments were performed at a, three-dimensional neutron depolarization spectrometer (NDS) based on the design of the instrument labeled LAP-ND of FRJ-2, Germany, constructed and commissioned at the W-3 port of the Tsing Hua Open-Pool Reactor (THOR), Taiwan. The two methods show a reasonable consistency regarding the He-3 polarization. This suggests that the NMR method is convenient and reliable for testing the He-3 polarization before neutron scattering experiments are performed.

• 出版日期2009-4
• 单位清华大学