Dissociation and ionization of H2+ by ultrashort intense laser pulses probed by coincidence 3D momentum imaging -: art. no. 073002

被引：93

作者：

Ben-Itzhak, I ^{[1
]}

Wang, PQ ^{[1
]}

Xia, JF ^{[1
]}

Sayler, AM ^{[1
]}

Smith, MA ^{[1
]}

Carnes, KD ^{[1
]}

Esry, BD ^{[1
]}

机构：

[1] Kansas State Univ, Dept Phys, JR Macdonald Lab, Manhattan, KS 66506 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.95.073002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Laser-induced dissociation and ionization of H-2(+) were simultaneously measured using coincidence 3D momentum imaging, allowing direct separation of the two processes, even where the fragment kinetic energy is the same for both processes. The results for 45 and 135 fs 790 nm pulses with an intensity of approximately 2.5x10(14) W/cm(2) differ from each other much more than one would expect from previous measurements with longer pulses. Ionization was negligible for the longer pulse and was strongly aligned along the laser polarization for the shorter pulse, but showed no structure in its kinetic energy distribution. In addition, the ionization to dissociation ratio was found to be much smaller than theoretically predicted for H-2(+).

引用

页数：4

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