• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Chemical Physics >Optical control of ground-state atomic orbital alignment: Cl(~2P_(3/2)) atoms from HCl(v=2, J=1) photodissociation
【24h】

Optical control of ground-state atomic orbital alignment: Cl(~2P_(3/2)) atoms from HCl(v=2, J=1) photodissociation

机译：基态原子轨道对准的光学控制：HCl（v = 2，J = 1）光解离的Cl（〜2P_（3/2））个原子

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

H~(35)Cl(v=0,J=0) molecules in a supersonic expansion were excited to the H~(35)Cl(v=2, J=1, M =0) state with linearly polarized laser pulses at about 1.7 mu m. These rotationally aligned J=1 molecules were then selectively photodissociated with a linearly polarized laser pulse at 220 nm after a time delay, and the velocity-dependent alignment of the ~(35)Cl(~2P_(3/2)) photofragments was measured using 2+1 REMPI and time-of-flight mass spectrometry. The ~(35)Cl(~2P_(3/2)) atoms are aligned by two mechanisms: (1) the time-dependent transfer of rotational polarization of the H~(35)Cl(v=2,J=1,M=0) molecule to the ~(35)Cl(~2P_(3/2)) nuclear spin [which is conserved during the phdtodissociation and thus contributes to the total ~(35)Cl(~2P_(3/2)) photofragment atomic polarization] and (2) the alignment of the ~(35)Cl(~2P_(3/2)) electronic polarization resulting from the photoexcitation and dissociation process. The total alignment of the ~(35)Cl(~2F_(3/2)) photofragments from these two mechanisms was found to vary as a function of time delay between the excitation and the photolysis laser pulses, in agreement with theoretical predictions. We show that the alignment of the ground-state ~(35)Cl(~2P_(3/2)) atoms, with respect to the photodissociation recoil direction, can be controlled optically. Potential applications include the study of alignment-dependent collision effects.
机译：超音速膨胀中的H〜（35）Cl（v = 0，J = 0）分子被线性偏振激光脉冲激发到H〜（35）Cl（v = 2，J = 1，M = 0）状态约1.7微米然后将这些旋转排列的J = 1分子在一段延时后用220 nm的线性偏振激光脉冲进行选择性光解离，并测量〜（35）Cl（〜2P_（3/2））光片段的速度依赖性排列使用2 + 1 REMPI和飞行时间质谱。 〜（35）Cl（〜2P_（3/2））原子通过两种机制排列：（1）H〜（35）Cl（v = 2，J = 1， M = 0）分子形成〜（35）Cl（〜2P_（3/2））核自旋[在光解离过程中是保守的，因此有助于总〜（35）Cl（〜2P_（3/2））光碎片原子极化]和（2）由光激发和解离过程产生的〜（35）Cl（〜2P_（3/2））电子极化的排列。发现这两种机理的〜（35）Cl（〜2F_（3/2））光片段的总排列随激发和光解激光脉冲之间的时间延迟而变化，这与理论预测相符。我们表明，基态〜（35）Cl（〜2P_（3/2））原子的排列，相对于光解离反冲方向，可以进行光学控制。潜在的应用包括对与路线有关的碰撞效应的研究。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号