Measurement of the Absolute Photoionization Cross Section for the 5P_(3/2) State of ^(87)Rb in a Vapor Cell Magneto-optic Trap

黄巍; 阮亚平; 贾凤东; 仲银鹏; 刘龙为; 戴星灿; 薛平; 许祥源; 钟志萍

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Measurement of the Absolute Photoionization Cross Section for the 5P_(3/2) State of ^(87)Rb in a Vapor Cell Magneto-optic Trap

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We report the measurement of the absolute photoionization cross section for the 5P_(3/2 )state of ^(87) Rb 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 5P_(3/2 )photoionization cross section at 473nm is determined to be σ_(PI) =10.5 ± 2.2 Mb.Considering the spatial distribution of the trapped atoms,the average intensity I_(PI) of the ionization laser seen by an atom in the MOT instead of ionizing laser intensity I_(PI) is used in our calculations for the photoionization cross sections.The excited state fraction is also accurately estimated using the latest experimental result.

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《中国物理快报：英文版》 |2012年第1期|86-89|共4页
作者
黄巍; 阮亚平; 贾凤东; 仲银鹏; 刘龙为; 戴星灿; 薛平; 许祥源; 钟志萍;
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作者单位

State Key Laboratory for Low-Dimensional Quantum Physics;

Department of Physics;

Tsinghua University;

Beijing 100084;

College of Physical Sciences;

Graduate University of the Chinese Academy of Sciences;

PO Box 4588;

Beijing 100049;

Department of Physics;

Capital Normal University;

Beijing 100037;

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原文格式 PDF
正文语种 chi
中图分类光电子技术、激光技术;
关键词
ionization; state; loaded;

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Measurement of the Absolute Photoionization Cross Section for the 5P_(3/2) State of ^(87)Rb in a Vapor Cell Magneto-optic Trap

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