Studies on shape resonance dynamics by photoelectron angular distribution measurements from oriented molecules

通过定向分子光电子角分布测量研究形状共振动力学

• 批准号: 14340126
• 负责人: YAGISHITA Akira
• 金额: $ 9.41万
• 依托单位: High Energy Accelerator Research Organization (2004)The High Energy Accelerator Research Organization (2002-2003)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-14340126/
• 关键词: velocity imaging; angular correlation; inversion symmetry; dissociation channel; triple coincidence; core-hole; 反転対称性; 分子の構造変形; 配向したCO_2分子; 光電子の角度分布パターン; CO_2分子の対称性; 運動量画像イメージング; 光電子・光イオン同時計測; 振動準位を分離; Franck-Condon原理の破れ; 形状共鳴; スピン多重度を分離 /

We have successfully designed and constructed a new apparatus of coincidence velocity imaging spectrometer for the study of angular correlations between photoelectrons and photofragments.Using this apparatus, we have measured momentum correlation patterns between O1s photoelectrons and photofragments of CO^+ and O^+ at the photon energy above the ionization threshold of O1s of CO_2 molecules. And we have found that the O1s photoelectron angular distribution pattern violate the inversion symmetry.We have also succeeded in measuring the C1s photoelectron angular distribution patterns of C_2H_2 molecules for each dissociation channel by the triple coincidence. For asymmetric dissociation channels, the C 1s photoelectron angular distribution patterns violate the inversion symmetry. This implies that the core-hole memory is preserved in the photofragments.

我们成功地设计和建造了一套用于研究光电子与光碎片角关联的符合速度成像光谱仪，并利用该装置测量了CO_2分子O 1 s电离阈值以上光子能量下O 1 s光电子与CO^+和O^+光碎片的动量关联图。我们还成功地用三重符合方法测量了C_2H_2分子在各个解离通道上的C_1s光电子角分布。对于非对称解离通道，C1 s光电子角分布模式违反反转对称性。这意味着核心-空穴记忆被保存在光碎片中。

项目成果

Photoelectron angular distributions from fixed-in-space molecules

固定空间分子的光电子角分布

• 发表时间: 2005
• 期刊: Journal of Electron Spectroscopy and Relat.Phenom. 142
• 作者: A.Kaminskii;S.Bagayev;K.Ueda;K.Takaichi;J.Lu;A.Shirakawa;H.Yagi;T.Yanagitani;H.Eichler;H.Rhee;T.Akazawa et al.;A.Yagishita
• 通讯作者: A.Yagishita

Multiple photoionization following 3d_<5/2>-shell threshold ionization of Xe

Xe 的 3d_<5/2>-壳层阈值电离后的多重光电离

• 发表时间: 2004
• 期刊: J.Phys.B ; At.Mol.Opt.Phys. 37
• 作者: Hiroya Ishikawa;M.Fujita;S.Ikeda et al.;T.Matsui
• 通讯作者: T.Matsui

Cascade processes after 3p-shell threshold photoionization of Kr.

Kr 的 3p 壳阈值光电离后的级联过程。

• 发表时间: 2002
• 期刊: J. Phys. B ; At. Mol. Opt. Phys. 35
• 作者: T.Matsui;H.Yoshii;A.Higurashi;E.Murakami;T.Aoto;T.Onuma;Y.Morioka;A.Yagishita;T.Hayaishi
• 通讯作者: T.Hayaishi

Complete photoionization experiment in the region of the 2□_g□ □_u shape resonance of the N_2 molecule

在N_2分子的2□_g□ □_u形状共振区域完成光电离实验

• 发表时间: 2002
• 期刊: J.Phys.B : At.Mol.Opt.Phys. 35
• 作者: A.Namiki;K.Kurita;S.Motoki
• 通讯作者: S.Motoki

K.Hosaka: "Multiplet-specific N 1s photoelectron angular distributions from the fixed-in-space NO molecules"J.Phys.B : At.Mol.Opt.Phys.. 37・3. L49-L55 (2004)

K.Hosaka：“来自固定空间NO分子的多特异性N 1s 光电子角分布”J.Phys.B：At.Mol.Opt.Phys.. 37・3（2004）。