Improved production of Br atoms near zero speed by photodissociating laser aligned Br2 molecules

被引：3

作者：

Deng, L. Z. ^{[1
]}

Yin, J. P. ^{[1
]}

机构：

[1] E China Normal Univ, Dept Phys, State Key Lab Precis Spect, Shanghai 200062, Peoples R China

来源：

JOURNAL OF CHEMICAL PHYSICS | 2014年 / 141卷 / 16期

关键词：

BOSE-EINSTEIN CONDENSATION; DIATOMIC-MOLECULES; SPATIAL ALIGNMENT; POLARIZABILITIES; SPECTROSCOPY; PHOTOLYSIS; FIELDS;

D O I：

10.1063/1.4898794

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We theoretically investigated the improvement on the production rate of the decelerated bromine (Br) atoms near zero speed by photodissociating laser aligned Br-2 precursors. Adiabatic alignment of Br-2 precursors exposed to long laser pulses with duration on the order of nanoseconds was investigated by solving the time-dependent Schrodinger equation. The dynamical fragmentation of adiabatically aligned Br-2 precursors was simulated and velocity distribution of the Br atoms produced was analyzed. Our study shows that the larger the degree of the precursor alignment, < cos(2) theta >, the higher the production rate of the decelerated Br atoms near zero speed. For Br-2 molecules with an initial rotational temperature of similar to 1 K, a < cos(2) theta > value of similar to 0.88 can result in an improvement factor of over similar to 20 on the production rate of the decelerated Br atoms near zero speed, requiring a laser intensity of only similar to 1 x 10(12) W/cm(2) for alignment. (C) 2014 AIP Publishing LLC.

引用

页数：6

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