dorsal/arxiv
View SchemaA quantitative theory-versus-experiment comparison for the intense laser dissociation of H2+
| Authors | Vassili Serov, Arne Keller, Osman Atabek, Nicolas Billy |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0305172 |
| URL | https://arxiv.org/abs/quant-ph/0305172 |
| DOI | 10.1103/PhysRevA.68.053401 |
Abstract
A detailed theory-versus-experiment comparison is worked out for H$_2^+$ intense laser dissociation, based on angularly resolved photodissociation spectra recently recorded in H.Figger's group. As opposite to other experimental setups, it is an electric discharge (and not an optical excitation) that prepares the molecular ion, with the advantage for the theoretical approach, to neglect without lost of accuracy, the otherwise important ionization-dissociation competition. Abel transformation relates the dissociation probability starting from a single ro-vibrational state, to the probability of observing a hydrogen atom at a given pixel of the detector plate. Some statistics on initial ro-vibrational distributions, together with a spatial averaging over laser focus area, lead to photofragments kinetic spectra, with well separated peaks attributed to single vibrational levels. An excellent theory-versus-experiment agreement is reached not only for the kinetic spectra, but also for the angular distributions of fragments originating from two different vibrational levels resulting into more or less alignment. Some characteristic features can be interpreted in terms of basic mechanisms such as bond softening or vibrational trapping.
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"abstract": "A detailed theory-versus-experiment comparison is worked out for H$_2^+$\nintense laser dissociation, based on angularly resolved photodissociation\nspectra recently recorded in H.Figger\u0027s group. As opposite to other\nexperimental setups, it is an electric discharge (and not an optical\nexcitation) that prepares the molecular ion, with the advantage for the\ntheoretical approach, to neglect without lost of accuracy, the otherwise\nimportant ionization-dissociation competition. Abel transformation relates the\ndissociation probability starting from a single ro-vibrational state, to the\nprobability of observing a hydrogen atom at a given pixel of the detector\nplate. Some statistics on initial ro-vibrational distributions, together with a\nspatial averaging over laser focus area, lead to photofragments kinetic\nspectra, with well separated peaks attributed to single vibrational levels. An\nexcellent theory-versus-experiment agreement is reached not only for the\nkinetic spectra, but also for the angular distributions of fragments\noriginating from two different vibrational levels resulting into more or less\nalignment. Some characteristic features can be interpreted in terms of basic\nmechanisms such as bond softening or vibrational trapping.",
"arxiv_id": "quant-ph/0305172",
"authors": [
"Vassili Serov",
"Arne Keller",
"Osman Atabek",
"Nicolas Billy"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.68.053401",
"title": "A quantitative theory-versus-experiment comparison for the intense laser dissociation of H2+",
"url": "https://arxiv.org/abs/quant-ph/0305172"
},
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