Isotope-selective ionization utilizing molecular alignment and non-resonant multiphoton ionization

被引：0
作者：
Hiroshi Akagi
Tatsuya Kasajima
Takayuki Kumada
Ryuji Itakura
Atsushi Yokoyama
Hirokazu Hasegawa
Yasuhiro Ohshima
机构：
[1] Japan Atomic Energy Agency,Quantum Beam Science Directorate, Kansai Photon Science Institute
[2] The University of Tokyo,Department of Integrated Sciences, Graduate School of Arts and Sciences
[3] National Institutes of Natural Sciences,Institute for Molecular Science
[4] The Graduate University for Advanced Studies (SOKENDAI),undefined
来源：
Applied Physics B | 2012年 / 109卷
关键词：
Wave Packet; Ionization Probability; Isotope Separation; Ionization Pulse; Revival Time;
D O I：
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中图分类号：
学科分类号：
摘要：
We demonstrate laser nitrogen isotope separation, which is based on field-free alignment and angular-dependent ionization of 14N2 and 15N2 isotopologues. A linearly polarized short laser pulse (λ ~ 795 nm, Δτ ~ 60 fs) creates rotational wave packets in the isotopologues, which periodically revive with different revival times as a result of different moments of inertia. Another linearly polarized short laser pulse (λ ~ 795 nm, Δτ ~ 60 fs) ionizes one of the isotopologues selectively as a result of their different angular distributions. In the present experiments, the ion yield ratio R [=I(15N2+)/I(14N2+)] can be changed in the range from 0.85 to 1.22, depending on the time delay between the two laser pulses.
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页码：75 / 80
页数：5
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