Above-threshold dissociation of the molecular ion HD+ in a moderate-intensity femtosecond laser field from the calculation of time-of-flight spectra

Above-threshold dissociation of the molecular ion HD+ in a moderate-intensity femtosecond laser... The dissociation of the molecular ion HD+ in moderate-intensity laser pulses is studied using the time-dependent quantum wave-packet method. Simulations of the time-of-flight (TOF) neutral atom spectra produced from dissociation of the v=10 vibrational state at a laser intensity of 1012W/cm2 and from v=0 at the intensity of 5×1012W/cm2 are calculated. Good agreement is found with previous experimental results [P. A. Orr , Phys. Rev. Lett. 98, 163001 (2007)10.1103/PhysRevLett.98.163001 and J. D. Alexander , J. Phys. B 42, 154027 (2009)10.1088/0953-4075/42/15/154027]. Furthermore, the kinetic energy distribution of the dissociated fragments of molecular ion HD+ is studied within the moderate laser-intensity region from 1012 to 5×1012W/cm2 by considering initial vibrational states from v=0 to 15. It is found that the above-threshold dissociation could be more obviously observed from the TOF spectra when the initial vibrational state is set as v=6 for a moderate-intensity femtosecond laser field. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review A American Physical Society (APS)

Above-threshold dissociation of the molecular ion HD+ in a moderate-intensity femtosecond laser field from the calculation of time-of-flight spectra

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Above-threshold dissociation of the molecular ion HD+ in a moderate-intensity femtosecond laser field from the calculation of time-of-flight spectra

Abstract

The dissociation of the molecular ion HD+ in moderate-intensity laser pulses is studied using the time-dependent quantum wave-packet method. Simulations of the time-of-flight (TOF) neutral atom spectra produced from dissociation of the v=10 vibrational state at a laser intensity of 1012W/cm2 and from v=0 at the intensity of 5×1012W/cm2 are calculated. Good agreement is found with previous experimental results [P. A. Orr , Phys. Rev. Lett. 98, 163001 (2007)10.1103/PhysRevLett.98.163001 and J. D. Alexander , J. Phys. B 42, 154027 (2009)10.1088/0953-4075/42/15/154027]. Furthermore, the kinetic energy distribution of the dissociated fragments of molecular ion HD+ is studied within the moderate laser-intensity region from 1012 to 5×1012W/cm2 by considering initial vibrational states from v=0 to 15. It is found that the above-threshold dissociation could be more obviously observed from the TOF spectra when the initial vibrational state is set as v=6 for a moderate-intensity femtosecond laser field.
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Publisher
The American Physical Society
Copyright
Copyright © ©2017 American Physical Society
ISSN
1050-2947
eISSN
1094-1622
D.O.I.
10.1103/PhysRevA.96.013426
Publisher site
See Article on Publisher Site

Abstract

The dissociation of the molecular ion HD+ in moderate-intensity laser pulses is studied using the time-dependent quantum wave-packet method. Simulations of the time-of-flight (TOF) neutral atom spectra produced from dissociation of the v=10 vibrational state at a laser intensity of 1012W/cm2 and from v=0 at the intensity of 5×1012W/cm2 are calculated. Good agreement is found with previous experimental results [P. A. Orr , Phys. Rev. Lett. 98, 163001 (2007)10.1103/PhysRevLett.98.163001 and J. D. Alexander , J. Phys. B 42, 154027 (2009)10.1088/0953-4075/42/15/154027]. Furthermore, the kinetic energy distribution of the dissociated fragments of molecular ion HD+ is studied within the moderate laser-intensity region from 1012 to 5×1012W/cm2 by considering initial vibrational states from v=0 to 15. It is found that the above-threshold dissociation could be more obviously observed from the TOF spectra when the initial vibrational state is set as v=6 for a moderate-intensity femtosecond laser field.

Journal

Physical Review AAmerican Physical Society (APS)

Published: Jul 26, 2017

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