| 同步辐射软X射线能区Ar原子光致电离截面的研究 |
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| 引用本文： | 郑雷,崔明启,赵屹东,朱杰,朱佩平. 同步辐射软X射线能区Ar原子光致电离截面的研究[J]. 中国物理 C, 2003, 27(6): 555-558 |
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| 作者姓名： | 郑雷 崔明启 赵屹东 朱杰 朱佩平 |
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| 作者单位： | 中国科学院高能物理研究所 北京100039(郑雷，崔明启，赵屹东，朱杰)，中国科学院高能物理研究所 北京100039(朱佩平) |
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| 摘 要： | 利用北京同步辐射装置3W1B光束线产生的单色光作为光源,流气式无窗低压强双电离室作为气体容器,选择氩气作为实验气体,使用合适的公式和软件,实验测定了能量从180到2?70eV范围内若干压强点处光致电离截面与能量的关系曲线.发现在氩原子的L吸收边附近光致电离截面与压强有关:压强越低,截面越大.实验结果与理论结果进行了对比,结果表明,在15?0—2?0?5eV能量范围,理论与实验符合良好,但是在氩原子的L吸收边附近由于束线分辨率的原因,理论与实验有一定偏差.
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| 关 键 词： | 光致电离截面 同步辐射 氩气 电离室 软X射线 |
| 收稿时间： | 2002-07-03 |
Research of Photoionization Cross-Section of Argon in Soft X-Ray Region of Synchrotron Radiation |
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| ZHENG Lei CUI Ming-Qi ) ZHAO Yi-Dong ZHU Jie ZHU Pei-Ping. Research of Photoionization Cross-Section of Argon in Soft X-Ray Region of Synchrotron Radiation[J]. High Energy Physics and Nuclear Physics, 2003, 27(6): 555-558 |
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| Authors: | ZHENG Lei CUI Ming-Qi ) ZHAO Yi-Dong ZHU Jie ZHU Pei-Ping |
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| Affiliation: | ZHENG Lei CUI Ming-Qi 1) ZHAO Yi-Dong ZHU Jie ZHU Pei-Ping |
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| Abstract: | Photoionization cross-sections of Ar under several pressure values are measured in the energy region from 180eV to 270eV by using monochromatic X-ray produced by the 3W1B beamline of Beijing Synchrotron Radiation Facility (BSRF). The experimental result indicates that the photoionization cross-section of Ar is obviously affected by the pressure of Ar in the vicinity of the edge of L-absorption of Ar: the higher the pressure, the smaller the photoionization cross-section. |
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| Keywords: | photoionization cross-section synchrotron radiation argon ion chamber soft X-ray |
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