dorsal/arxiv
View SchemaAngular distribution in two-photon double ionization of helium by intense attosecond soft X-ray pulses
| Authors | I. F. Barna, J. Wang, J. Burgdoerfer |
|---|---|
| Categories | |
| ArXiv ID | physics/0601080 |
| URL | https://arxiv.org/abs/physics/0601080 |
| DOI | 10.1103/PhysRevA.73.023402 |
| Journal | Phys. Rev. A 73, 023402 (2006) |
Abstract
We investigate two-photon double ionization of helium by intense ($10^{15} W/cm^2$) ultrashort ($\approx 300$ as) soft X-ray pulses (E = 91.6 eV). The time-dependent two-electron Schr\"odinger equation is solved using a coupled channel method. We show that for ultrashort pulses the angular distribution of ejected electrons depends on the pulse duration and provides novel insights into the role of electron correlations in the two-electron photoemission process. The angular distribution at energies near the ``independent electron'' peaks is close to dipolar while it acquires in the ``valley'' of correlated emission a significant quadrupolar component within a few hundred attoseconds.
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"abstract": "We investigate two-photon double ionization of helium by intense ($10^{15}\nW/cm^2$) ultrashort ($\\approx 300$ as) soft X-ray pulses (E = 91.6 eV). The\ntime-dependent two-electron Schr\\\"odinger equation is solved using a coupled\nchannel method. We show that for ultrashort pulses the angular distribution of\nejected electrons depends on the pulse duration and provides novel insights\ninto the role of electron correlations in the two-electron photoemission\nprocess. The angular distribution at energies near the ``independent electron\u0027\u0027\npeaks is close to dipolar while it acquires in the ``valley\u0027\u0027 of correlated\nemission a significant quadrupolar component within a few hundred attoseconds.",
"arxiv_id": "physics/0601080",
"authors": [
"I. F. Barna",
"J. Wang",
"J. Burgdoerfer"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.73.023402",
"journal_ref": "Phys. Rev. A 73, 023402 (2006)",
"title": "Angular distribution in two-photon double ionization of helium by intense attosecond soft X-ray pulses",
"url": "https://arxiv.org/abs/physics/0601080"
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