摘要We present the measurements and calculations of the absolute total collision cross sections for a room-temperature gas of helium using 87Rb atoms confined in either a magneto-optic or a magnetic quadrupole trap. The loss rates from the magneto-optic trap and the pure magnetic trap are compared and show significant differences. The collision cross sections as a function of trap depth for helium gas are obtained. These findings are significant for extracting the information about the different cross sections when the trap depth is changed.
Abstract：We present the measurements and calculations of the absolute total collision cross sections for a room-temperature gas of helium using 87Rb atoms confined in either a magneto-optic or a magnetic quadrupole trap. The loss rates from the magneto-optic trap and the pure magnetic trap are compared and show significant differences. The collision cross sections as a function of trap depth for helium gas are obtained. These findings are significant for extracting the information about the different cross sections when the trap depth is changed.
WANG Ji-Cheng;ZHOU Ke-Ya;WANG Yue-Yuan;LIAO Qing-Hong;LIU Shu-Tian**
. Measurement of Absolute Atomic Collision Cross Section with Helium Using 87Rb Atoms Confined in Magneto-Optic and Magnetic Traps[J]. 中国物理快报, 2011, 28(4): 43401-043401.
WANG Ji-Cheng, ZHOU Ke-Ya, WANG Yue-Yuan, LIAO Qing-Hong, LIU Shu-Tian**
. Measurement of Absolute Atomic Collision Cross Section with Helium Using 87Rb Atoms Confined in Magneto-Optic and Magnetic Traps. Chin. Phys. Lett., 2011, 28(4): 43401-043401.
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