Research output: Contribution to journal › Article › peer-review
Studies of H2 photoionization by a strong ultrashort x-ray pulse on base of a trajectory method. / Astashkevich, S. A. ; Borovykh, S. V. ; Mityureva, A. A. ; Smirnov, V. V. .
In: Laser Physics, Vol. 30, No. 7, 075301, 07.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Studies of H2 photoionization by a strong ultrashort x-ray pulse on base of a trajectory method
AU - Astashkevich, S. A.
AU - Borovykh, S. V.
AU - Mityureva, A. A.
AU - Smirnov, V. V.
PY - 2020/7
Y1 - 2020/7
N2 - Photoionization of the hydrogen molecule was studied using our previously developed semiclassical trajectory method. The focus was on the parameters of the field for which there are no other results, namely a short photo-pulse with photon energies from soft to hard x-rays and with intensities including superatomic values. We calculated photoionization probabilities for the single and double ionization of H2. In the superatomic field we observed the transientfrom single-photon to multiphoton double photoionization, the inversion of single and double ionization probabilities, and distinct stabilization effect for the single photoionization. We also observed a specific behavior in the single photoionization probability dynamics with a dip in the middle of the pulse, which becomes extremely deep for a field approaching relativistic intensity. The agreement of our previous results with independent data on the helium atom in superatomic field is an important argument in favor of the efficiency of the used method. This allows us to hope that the probabilities of photoionization of a hydrogen molecule in an atomic and superatomic x-ray field obtained in this work are not only the first, but also quite reasonable results on the indicated process.
AB - Photoionization of the hydrogen molecule was studied using our previously developed semiclassical trajectory method. The focus was on the parameters of the field for which there are no other results, namely a short photo-pulse with photon energies from soft to hard x-rays and with intensities including superatomic values. We calculated photoionization probabilities for the single and double ionization of H2. In the superatomic field we observed the transientfrom single-photon to multiphoton double photoionization, the inversion of single and double ionization probabilities, and distinct stabilization effect for the single photoionization. We also observed a specific behavior in the single photoionization probability dynamics with a dip in the middle of the pulse, which becomes extremely deep for a field approaching relativistic intensity. The agreement of our previous results with independent data on the helium atom in superatomic field is an important argument in favor of the efficiency of the used method. This allows us to hope that the probabilities of photoionization of a hydrogen molecule in an atomic and superatomic x-ray field obtained in this work are not only the first, but also quite reasonable results on the indicated process.
KW - photoionization probability
KW - superatomic field
KW - ultrashort pulse
KW - x-rays
KW - hydrogen molecule
KW - trajectory-based method
KW - photoionization probability
KW - superatomic field
KW - ultrashort pulse
KW - x-rays
KW - hydrogen molecule
KW - trajectory-based method
KW - MULTIPHOTON IONIZATION
KW - DOUBLE PHOTOIONIZATION
KW - H-2
KW - HYDROGEN
KW - INTENSE
KW - FIELD
KW - ELECTRON
KW - MOLECULE
KW - HELIUM
KW - ENERGY
UR - https://iopscience.iop.org/article/10.1088/1555-6611/ab93d8
UR - http://www.scopus.com/inward/record.url?scp=85091431362&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/702abd65-5b01-376a-ac4e-2d1381dc9f4c/
U2 - 10.1088/1555-6611/ab93d8
DO - 10.1088/1555-6611/ab93d8
M3 - Article
VL - 30
JO - Laser Physics
JF - Laser Physics
SN - 1054-660X
IS - 7
M1 - 075301
ER -
ID: 60045689