2017
DOI: 10.1103/physreva.96.013426
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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. Simulation of the time of flight (TOF) neutral atom spectra produced from dissociation of the v = 10 vibrational state at a laser intensity of 10 12 W/cm 2 and from v = 0 at the intensity of 5 × 10 12 W/cm 2 are calculated. Good agreement is found with previous experimental results [Phys. Rev.

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Cited by 8 publications
(4 citation statements)
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“…The dissociation probability of the molecule can be inhibited in a strong laser field due to the vibrational wave packet trapping in the upper adiabatic potential [23,24], i.e., BH. The above-threshold dissociation involving net absorption of two or three photons became the dominant dissociation process for the appropriate initial quantum state in HD + molecule when the single-photon dissociation channel was inhibited by the BH mechanism [25]. The LICI was first found in the photodissociation of the diatomic molecule Na 2 [26], which cannot form a natural conical intersection under the absence of laser field conditions.…”
Section: Introductionmentioning
confidence: 99%
“…The dissociation probability of the molecule can be inhibited in a strong laser field due to the vibrational wave packet trapping in the upper adiabatic potential [23,24], i.e., BH. The above-threshold dissociation involving net absorption of two or three photons became the dominant dissociation process for the appropriate initial quantum state in HD + molecule when the single-photon dissociation channel was inhibited by the BH mechanism [25]. The LICI was first found in the photodissociation of the diatomic molecule Na 2 [26], which cannot form a natural conical intersection under the absence of laser field conditions.…”
Section: Introductionmentioning
confidence: 99%
“…These laser pulses with enormous field strength change the electronic structure of the molecular system, which ultimately guides the nuclear dynamics. An ultrashort intense laser pulse initiates several non-linear strong-field processes, such as high-harmonic generation (HHG), 7 above-threshold ionization (ATI), 8 bond-softening (BS), 9 bond-hardening (BH), 10 above-threshold dissociation (ATD), 11 etc. Investigating such complex dynamics in molecules is challenging, both experimentally and theoretically, because of the inclusion of the various degrees of freedom of different timescales, viz.…”
Section: Introductionmentioning
confidence: 99%
“…These ultrashort laser pulses are an ideal tool to probe the electron and nuclear dynamics in real-time. 2,3 Since the magnitude of the optical field of these intense laser pulses are comparable to that of internal coulomb field of molecules, thereby a variety of processes such as above-threshold dissociation(ATD), 4 bond softening(BS), 5 bond hardening, 6 Coulomb explosion(CE) 7 are initiated upon exposure to these intense pulses. In ATD, the molecule absorbs more photons than are required to overcome the bound energy barrier.…”
Section: Introductionmentioning
confidence: 99%
“…With the recent advancement in laser technology, highly intense laser pulses with femtosecond (1 fs = 10 –15 s) to attosecond (1 as = 10 –18 s) time durations are readily available and have opened the possibility to achieve this. These ultrashort laser pulses are an ideal tool to probe the electron and nuclear dynamics in real time. , Since the magnitude of the optical field of these intense laser pulses is comparable to that of the internal Coulomb field of molecules, a variety of processes such as above-threshold dissociation (ATD), bond softening (BS), bond hardening, and Coulomb explosion (CE) are initiated upon exposure to these intense pulses. In ATD, the molecule absorbs more photons than are required to overcome the bound energy barrier.…”
Section: Introductionmentioning
confidence: 99%