Strong-field-induced bond rearrangement in triatomic molecules
Strong-field-induced bond rearrangement in triatomic molecules
复制标题
DOI：
10.1103/physreva.99.053412
复制
发表时间：
2019-05
影响因子：
2.9
通讯作者：
S. Zhao;B. Jochim;Peyman Feizollah;J. Rajput;F. Ziaee;P. KanakaRaju;B. Kaderiya;K. Borne;Y. Malakar;B. Berry;J. Harrington;D. Rolles;A. Rudenko;K. Carnes;E. Wells;I. Ben-Itzhak;T. Severt
中科院分区：
文献类型：
--
作者：
S. Zhao;B. Jochim;Peyman Feizollah;J. Rajput;F. Ziaee;P. KanakaRaju;B. Kaderiya;K. Borne;Y. Malakar;B. Berry;J. Harrington;D. Rolles;A. Rudenko;K. Carnes;E. Wells;I. Ben-Itzhak;T. Severt
本文报道了三种三原子分子：二氧化碳、羰基硫化物和水（）的双电离键重排的比较研究。具体来说，我们研究了在强、短（23fs, 790nm）激光脉冲双重电离后，由三原子分子的边缘原子形成分子阳离子。使用每个分子的双电离分支比进行比较，从而最大限度地减少由于不同的电离速率而产生的差异。水分子的重排分支率最高，其初始几何形状是弯曲的，而OCS分子是线性的。产生的碎片角分布基本上是各向同性的，而来自OCS和来自的碎片角分布与激光偏振方向一致。在两种情况下，键重排通道的角分布不同于主要解离双电离通道的角分布。只有OCS的角分布与激光偏振方向一致，且与最大解离通道的角分布相似。从不同分子的角分布观察到的混合行为与键重排分支比大小的相对一致性形成对比。
A comparative study of bond rearrangement is reported for the double ionization of three triatomic molecules: carbon dioxide, carbonyl sulfide, and water (). Specifically, we study the formation of the molecular cationfrom the edge atoms of a triatomic molecular dicationfollowing double ionization by intense, short (23 fs, 790 nm) laser pulses. The comparison is made using the double ionization branching ratio of each molecule, thereby minimizing differences due to differing ionization rates. The rearrangement branching ratio is highest for water, which has a bent initial geometry, whileand OCS are linear molecules. The angular distribution offragments arising fromis essentially isotropic, whilefrom OCS andfromare aligned with the laser polarization. In theandcases, the angular distributions of the bond rearrangement channels are different from the angular distributions of the dominant dissociative double ionization channelsand. Only the angular distribution offrom OCS is both aligned with the laser polarization and similar to the angular distribution of the largest dissociative channel,. The mixed behavior observed from the angular distributions of the different molecules stands in contrast to the relative consistency of the magnitude of the bond rearrangement branching ratio.