Counterintuitive alignment of H2(+) in intense femtosecond laser fields.
نویسندگان
چکیده
The multiphoton ionization of H2 has been studied using laser pulses of 266 nm wavelength, 250 fs duration, and 5x10(13) W/cm(2) peak intensity. Dissociation of H2(+) via one-photon absorption proceeds through two channels with markedly different proton angular distributions. The lower-energy channel (2.6 eV kinetic energy release) is produced in the bond softening mechanism, which generates parallel alignment. The higher-energy channel (3.5 eV) originates from population trapping in a light-induced bound state, where bond hardening generates orthogonal, counterintuitive alignment.
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عنوان ژورنال:
- Physical review letters
دوره 86 12 شماره
صفحات -
تاریخ انتشار 2001