Measurement of the Absolute Photoionization Cross Section for the 5P3/2 State of 87Rb in a Vapor Cell Magneto-optic Trap
HUANG Wei1, RUAN Ya-Ping2, JIA Feng-Dong2, ZHONG Yin-Peng2, LIU Long-Wei2, DAI Xing-Can1, XUE Ping1, XU Xiang-Yuan1,3, ZHONG Zhi-Ping2**
1State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084 2College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, PO Box 4588, Beijing 100049 3Department of Physics, Capital Normal University, Beijing 100037
Measurement of the Absolute Photoionization Cross Section for the 5P3/2 State of 87Rb in a Vapor Cell Magneto-optic Trap
HUANG Wei1, RUAN Ya-Ping2, JIA Feng-Dong2, ZHONG Yin-Peng2, LIU Long-Wei2, DAI Xing-Can1, XUE Ping1, XU Xiang-Yuan1,3, ZHONG Zhi-Ping2**
1State Key Laboratory for Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084 2College of Physical Sciences, Graduate University of the Chinese Academy of Sciences, PO Box 4588, Beijing 100049 3Department of Physics, Capital Normal University, Beijing 100037
摘要We report the measurement of the absolute photoionization cross section for the 5P3/2 state of 87Rb at wavelength of 473 nm, which results in the photoelectron energies of 33 meV above the ionization threshold, using cold atoms confined in a vapor−loaded magneto-optical trap. The 87Rb 5P3/2 photoionization cross section at 473 nm is determined to be σPI=10.5±2.2 Mb. Considering the spatial distribution of the trapped atoms, the average intensity IPI of the ionization laser seen by an atom in the MOT instead of ionizing laser intensity IPI is used in our calculations for the photoionization cross sections. The excited state fraction is also accurately estimated using the latest experimental result.
Abstract：We report the measurement of the absolute photoionization cross section for the 5P3/2 state of 87Rb at wavelength of 473 nm, which results in the photoelectron energies of 33 meV above the ionization threshold, using cold atoms confined in a vapor−loaded magneto-optical trap. The 87Rb 5P3/2 photoionization cross section at 473 nm is determined to be σPI=10.5±2.2 Mb. Considering the spatial distribution of the trapped atoms, the average intensity IPI of the ionization laser seen by an atom in the MOT instead of ionizing laser intensity IPI is used in our calculations for the photoionization cross sections. The excited state fraction is also accurately estimated using the latest experimental result.
HUANG Wei;RUAN Ya-Ping;JIA Feng-Dong;ZHONG Yin-Peng;LIU Long-Wei;DAI Xing-Can;XUE Ping;XU Xiang-Yuan;ZHONG Zhi-Ping**. Measurement of the Absolute Photoionization Cross Section for the 5P3/2 State of 87Rb in a Vapor Cell Magneto-optic Trap[J]. 中国物理快报, 2012, 29(1): 13201-013201.
HUANG Wei, RUAN Ya-Ping, JIA Feng-Dong, ZHONG Yin-Peng, LIU Long-Wei, DAI Xing-Can, XUE Ping, XU Xiang-Yuan, ZHONG Zhi-Ping**. Measurement of the Absolute Photoionization Cross Section for the 5P3/2 State of 87Rb in a Vapor Cell Magneto-optic Trap. Chin. Phys. Lett., 2012, 29(1): 13201-013201.
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2012, Vol. 29 
