Dynamics of Predissociation and Atom-Molecule Collision, and the Effects of Magnetic Field

预解离和原子分子碰撞的动力学以及磁场的影响

• 批准号: 60470014
• 负责人: KATO Hajime
• 金额: $ 3.65万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60470014/
• 关键词: Predissociation; Photodissociation; Laser; Zeeman effect; Magnetic field; Alkali metal; Fluorescence; エネルギー移動

A preferential population of the magnetic sublevels of the atomic fragment Na(3 <^2P_(3/2)> ), which arises from the direct photodissociation through the D <^1(PI)> state of the Nak molecule, has been observed. The results are explained by assuming the separability of electronic and nuclear motion during the dissociation.The population of the magnetic sublevels of Rb(5 <^2P_(3/2)> ) atoms produced by predissociation of the C <^1(PI)_u> state of the <Rb_2> molecule through the repulsive molecular state c <^3> SIGMA <(_u^+)> has been determined from the Zeeman spectra of the emission Rb(5 <^2P_(3/2)> - 5 <^2S_(1/2)> ). The observed results are interpreted by including the spin-orbit coupling between an excited level of the C <^1(PI)_u> state and levels of the c <^3> SIGMA <(_u^+)> state and the effect of the external magnetic field.We measured the picosecond time-resolved fluorescence of the <Cs_2> molecule excited by a laser line of 15841 <cm^(-1)> by changing the vapor pressure. From the consideration of the rise and decay rates of the fluorescence intensities, the kinetic pathways of the collisional energy transfer were estimated. The intensity of the fluorescence d <^3(PI)_u> - X <^1> SIGMA <(_g^+)> was found to decrease appreciably in the presence of an external magnetic field, and it is ascribed to the predissociation.

观察到Na（3 <^2P_（3/2）>）原子碎片的磁子能级的择优布居，它是由Nak分子的D <^1（PI）>态直接光解产生的。从Rb（5 &lt;^2P_（3/2）&gt;）原子的塞曼谱出发，确定了Rb（5 &lt;^2P_（3/2）&gt;）原子的磁子能级布居数，这些磁子能级是由Rb分子的C &lt;^1（PI）_u&gt;态<Rb_2>通过排斥分子态c &lt;^3&gt; SIGMA &lt;（_u^+）&gt;预解离而产生的（5 &lt;^2P_（3/2）&gt; - 5 &lt;^2S_（1/2）&gt;）。我们用15841 &lt;cm^（-1）&gt;激光激发该分子，通过改变蒸气压，测量了其皮秒时间分辨荧光，并考虑了C1（PI）u&gt;态激发能级与c3 SIGMA（_u^+）&gt;态能级之间的自旋轨道耦合以及外加磁场的影响<Cs_2>.从荧光强度的上升和衰减速率的考虑，碰撞能量转移的动力学途径进行了估计。在外加磁场的作用下，d &lt;^3（PI）_u&gt; - X &lt;^1&gt; SIGMA &lt;（_g^+）&gt;的荧光强度明显减弱，这是由于预解离的结果。

项目成果

加藤肇: 分光研究. 35. 203-217 (1986)

加藤肇：光谱学研究 35. 203-217 (1986)

加藤肇: The Journal of Chemical Physics.

加藤肇：《化学物理学杂志》。

Kazushige Yokoyama: "High-resolution Laser Spectroscopy of Alkali Diatomic Molecules <II> . <Cs_2> d <^3(PI)_u> state and the predissociation" The Journal of Chemical Physics.

Kazushige Yokoyama：“碱性双原子分子的高分辨率激光光谱<II>。<Cs_2> d <^3(PI)_u>状态和预解离”化学物理杂志。

加藤肇: Faraday Discussions of the Chemical Society. 82. 1-12 (1986)

Hajime Kato：化学学会的法拉第讨论 82. 1-12 (1986)。

Hajime Kato: "Dynamics of <Cs_2> excited by a Synchronously Pumped Mode-locked Dye Laser, and the Effects of Magnetic Field" The Journal of Chemical Physics.

Hajime Kato：“同步泵浦锁模染料激光器激发的 <Cs_2> 动力学以及磁场的影响”《化学物理杂志》。