| 强场对Au4团簇性质的影响 |
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| 引用本文： | 王红艳,唐永建,王朝阳,朱正和.强场对Au4团簇性质的影响[J].原子与分子物理学报,2003,20(4):493-496. |
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| 作者姓名： | 王红艳 唐永建 王朝阳 朱正和 |
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| 作者单位： | 1. 四川大学原子与分子物理所,成都,610065
2. 激光聚变中心,中国工程物理研究院,绵阳,621900 |
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| 基金项目： | 国家自然科学基金(批准号:10276028)资助. |
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| 摘 要： | 采用与时间相关的局域密度泛函 (TDLDA/B3LYP)方法研究Au4团簇的几何构型、分子轨道能级分布和激发能在强激光场中的变化.计算结果表明:电场不能改变Au4团簇的几何构型,随着电场的增加,电离势和电子亲和势增加,而费米能级和能隙减小.通过比较不同电场强度下激发能,指出要产生超短波脉冲或实现X射线软化,强激光场中的团簇的高次谐波是一种可能的途径.
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| 关 键 词： | 团簇 强场 激发能 X射线激光 |
| 文章编号： | 1000-0364(2003)04-0493-04 |
| 收稿时间： | 2003/3/11 |
| 修稿时间： | 2003年3月11日 |
The properties of Au4 cluster in high field |
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| WANG Hong-yan,TANG Yong-jian,WANG Chao-yang,ZHU Zheng-he.The properties of Au4 cluster in high field[J].Journal of Atomic and Molecular Physics,2003,20(4):493-496. |
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| Authors: | WANG Hong-yan TANG Yong-jian WANG Chao-yang ZHU Zheng-he |
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| Institution: | WANG Hong-yan~1,TANG Yong-jian~2,WANG Chao-yang~2,ZHU Zheng-he~1 |
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| Abstract: | The equilibrium geometries, the orbital energy levels and the excited energies of Au_4 cluster in the high-intensity field have been calculated by using TDLDA/B3LYP method. It is shown that the Au_4 cluster do not undergo significant geometrical changes in the high field. The electron affinities and the ionization potentials increase with the intensity of the extra field, while the Fermi levels and the energy gaps decrease. By analyzing the excited energies, one finds that the electron transition can not provide ultrashort high-intensity laser pulses. Thus the high order harmonics for Au_4 cluster may be a source of the X-ray laser. |
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| Keywords: | Cluster High field Excited energy X-ray laser |
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