| 242-260nm波长区CS2分子的多光子解离电离 |
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| 引用本文： | 张立敏,陈军,戴静华,王储记,章弢,陈从香,马兴孝. 242-260nm波长区CS2分子的多光子解离电离[J]. 物理化学学报, 1998, 14(11): 1007-1012. DOI: 10.3866/PKU.WHXB19981109 |
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| 作者姓名： | 张立敏 陈军 戴静华 王储记 章弢 陈从香 马兴孝 |
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| 作者单位： | Laboratory for Bond-selective Chemistry,Academy Sinica;Departmetn of Chemical Physics,University of Science and Technology of China,Hefei 230026 |
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| 基金项目： | 国家自然科学基金，安徽省自然科学基金 |
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| 摘 要： | 在242－260nm波氏范围通过CS2分子的共振增强多光子电离（REMPI）获得了母体离子CS和碎片离子的分质量激发谱．在λ＜246.4nm区间，CS激发谱上呈现出来源于CS2双光子电离的弥散谱带,碎片离子激发谱的归属强烈提示多光子过程中有中性基电子态的CS和S（经由CS2的光解离）产生：（1）CS 的谱带主要来源于中性CS碎片经由单光子跃迁产生的（1＋1）共振增强电离，（2）除了部分S 的谱峰来自CS 的光解外，多数S 的锐谱峰来自中性S原子经由3p3（2D0）4p，3p3（4S0）np（n＝6，7，8）←3p43pJ（J＝2，1,0）双光子跃迁产生的（2＋1）共振增强电离．
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| 关 键 词： | CS2分子 光解离 CS碎片 S原子 |
| 收稿时间： | 1998-01-12 |
| 修稿时间： | 1998-05-25 |
The Multiphoton Dissociation and ionization of CS_2 in the Range 242-260nm |
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| Zhang Limin, Chen Jun, Dai Jinghua, Wang Chuji, Zhang Tao, Chen Congxiaug ,Ma Xingxiao. The Multiphoton Dissociation and ionization of CS_2 in the Range 242-260nm[J]. Acta Physico-Chimica Sinica, 1998, 14(11): 1007-1012. DOI: 10.3866/PKU.WHXB19981109 |
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| Authors: | Zhang Limin Chen Jun Dai Jinghua Wang Chuji Zhang Tao Chen Congxiaug Ma Xingxiao |
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| Affiliation: | Laboratory for Bond-selective Chemistry,Academy Sinica;Departmetn of Chemical Physics,University of Science and Technology of China,Hefei 230026 |
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| Abstract: | The mass-selected excitation spectra for parent ion CS and the fragmentation ions CS+, S+ and C+ are obtained by using the resonance-enhanced multiphoton ionization (REMPI)of CS2 in the range 242 260nm. It is shown that the diffuse bands of CS in range of λ<246.4nm are mainly from the two-photon ionization of CS2. It has been reasonably assumed from the assignments of excitation spectra for the fragments that the neutral CS and S are produced by the photodissociation of CS2 in the process, that is, (1) the bands of CS+ are mainly due to the (1+1) resonance-enhanced ionization via the one-photon transition of the fragment CS, (2) besides part of S+ spectral peaks are from the dissociation of CS+, most of S+ spectral peaks are due to the (2+1) resonance-enhanced ionization via the two-photon transition 3p3 (2D0) 4p, 3p3 (4S0) np (n=6,7,8)←3p4 3PJ (J=2,1,0) of S atoms. |
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| Keywords: | CS_2 Photodissociation CS fragmentation S atom |
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