Publications [#246184] of Haiyan Gao

Papers Published

1. Fedchak, JA; Bailey, K; Cummings, WJ; Gao, H; Holt, RJ; Jones, CE; Kowalczyk, RS; O'Neill, T; Poelker, M, Nuclear tensor polarization in a laser-driven polarized deuterium internal target, Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, vol. 417 no. 2-3 (November, 1998), pp. 182-196, Elsevier BV, ISSN 0168-9002 [doi]
   (last updated on 2026/01/14)

   Abstract:
   We present the results of the first direct measurement of nuclear polarization in an optically pumped spin-exchange polarized deuterium target. Measurements of the nuclear tensor polarization pzz are made in a storage cell as a function of flow of deuterium nuclei. For these measurements, the optical pumping was performed on atoms in magnetic fields of 600 and 3600 G. These measurements verify that the spin-exchange method is capable of producing polarized deuterium nuclei without the use of rf transitions. The electronic polarization, Pe, is also measured. The Pe and pzz measurements at 600 G indicate that the system is in spin-temperature equilibrium, whereas the 3600 G measurements show signatures of non-equilibrium effects. Pe is also measured with the system operated as a source of polarized atoms, with no storage cell. These measurements are compared with previous measurements using a similar source. © 1998 Elsevier Science B.V. All rights reserved.