Details
| Original language | English |
|---|---|
| Pages (from-to) | 433-442 |
| Number of pages | 10 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Volume | 33 |
| Issue number | 3 |
| Publication status | Published - 14 Feb 2000 |
| Externally published | Yes |
Abstract
We perform time-dependent quantum calculations on the ionization dynamics of helium in intense ultrashort laser fields. A linear model of the atom is used to extract single- and double-ionization yields for a 780 nm excitation. For an intensity of 1015 W cm-2 clear evidence is found for a direct double-ionization process which is caused by rescattering of an electron from the core in the presence of the field. A momentum-space analysis of the wavefunctions shows that in this case both electrons are preferentially emitted in the same direction and with different momenta.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Journal of Physics B: Atomic, Molecular and Optical Physics, Vol. 33, No. 3, 14.02.2000, p. 433-442.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - On the mechanism of strong-field double photoionization in the helium atom
AU - Lein, Manfred
AU - Gross, E. K. U.
AU - Engel, Volker
N1 - Copyright: Copyright 2007 Elsevier B.V., All rights reserved.
PY - 2000/2/14
Y1 - 2000/2/14
N2 - We perform time-dependent quantum calculations on the ionization dynamics of helium in intense ultrashort laser fields. A linear model of the atom is used to extract single- and double-ionization yields for a 780 nm excitation. For an intensity of 1015 W cm-2 clear evidence is found for a direct double-ionization process which is caused by rescattering of an electron from the core in the presence of the field. A momentum-space analysis of the wavefunctions shows that in this case both electrons are preferentially emitted in the same direction and with different momenta.
AB - We perform time-dependent quantum calculations on the ionization dynamics of helium in intense ultrashort laser fields. A linear model of the atom is used to extract single- and double-ionization yields for a 780 nm excitation. For an intensity of 1015 W cm-2 clear evidence is found for a direct double-ionization process which is caused by rescattering of an electron from the core in the presence of the field. A momentum-space analysis of the wavefunctions shows that in this case both electrons are preferentially emitted in the same direction and with different momenta.
UR - http://www.scopus.com/inward/record.url?scp=0033888660&partnerID=8YFLogxK
U2 - 10.1088/0953-4075/33/3/312
DO - 10.1088/0953-4075/33/3/312
M3 - Article
AN - SCOPUS:0033888660
VL - 33
SP - 433
EP - 442
JO - Journal of Physics B: Atomic, Molecular and Optical Physics
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
IS - 3
ER -