Angle-resolved Beutler-Fano profile and dynamics for the predissociation of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi mathvariant="bold">H</mml:mi><mml:mn mathvariant="bold">2</mml:mn></mml:msub></mml:math>

Meng, Qingnan; Wang, Jie; Mo, Yuxiang

doi:10.1103/physreva.93.050501

Cited by 12 publications

(14 citation statements)

References 27 publications

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“…Being inaccessible to laser cooling with standard techniques, the study of controlled H þ H collisions could take place in atomic beam scattering experiments or using a half-collision approach, i.e., by photodissociating molecular hydrogen. Given the narrow width of the resonances (50 nK-5 mK), the former seems unrealistic, whereas for the later only collisions between ground and excited H atoms could be probed [23].…”

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confidence: 99%

Shape Resonances in H2 as Photolysis Reaction Intermediates

et al. 2021

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confidence: 99%

Shape Resonances in H2 as Photolysis Reaction Intermediates

et al. 2021

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“…Being inaccessible to laser cooling with standard techniques, the study of controlled H+H collisions could take place in atomic beam scattering experiments or using a half-collision approach, i.e., by photodissociating molecular hydrogen. Given the narrow width of the resonances (50 nK-5 mK), the former seems unrealistic, whereas for the later only collisions between ground and excited H atoms could be probed [25].…”

Section: H Smentioning

confidence: 99%

Shape resonances in H$_2$ as photolysis reaction intermediates

Lai,

Salumbides,

Ubachs

et al. 2021

Preprint

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Shape resonances in H2, produced as reaction intermediates in the photolysis of H2S precursor molecules, are measured in a half-collision approach. Before desintegrating into two ground state H atoms, the reaction is quenched by two-photon Doppler-free excitation to the F electronically excited state of H2. For J = 13, 15, 17, 19 and 21, resonances with lifetimes in the range of nano to milliseconds were observed with an accuracy of 30 MHz (1.4 mK). The experimental resonance positions are found to be in excellent agreement with theoretical predictions when nonadiabatic and quantum electrodynamical corrections are included. This is the first time such effects are observed in collisions between neutral atoms. From the potential energy curve of the H2 molecule, now tested at high accuracy over a wide range of internuclear separations, the s-wave scattering length for singlet H(1s)+H(1s) scattering is determined at a = 0.2735 39 31 a0.

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“…The obtained anisotropy parameters show that the main dissociating components of the 3pπD 1 Π + u (v=3) state have 1 Σ + u symmetry, and that of the 3pπD 1 Π − u (v=3) and 4pσB ′′1 Σ + u (v=1) states have 1 Π − u and 1 Σ + u symmetry respectively, as expected. In the study of the H 2 predissociative state of 3pπD 1 Π + u (v=4), angle-and fully rotationally-resolved Beutler-Fano profiles have been obtained for the first time [19]. The profiles are found to have different shapes at the parallel and perpendicular directions relative to the polarization direction of the dissociation laser.…”

Section: A H 2 (D 2 Hd)mentioning

confidence: 99%

Quantum state-to-state vacuum ultraviolet photodissociation dynamics of small molecules

Gao

2019

Chinese Journal of Chemical Physics

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The present review focused on selected, recent experimental progress of photodissociation dynamics of small molecules covering the vacuum ultraviolet (VUV) range from 6 eV to 20 eV. These advancements come about due to the available laser based VUV light sources, along with the developments of advanced experimental techniques, including the velocitymap imaging (VMI), H-atom Rydberg tagging time-of-flight (HRTOF) techniques, as well as the two-color tunable VUV-VUV laser pump-probe detection method. The applications of these experimental techniques have allowed VUV photodissociation studies of many diatomic and triatomic molecules to quantum state-to-state in detail. To highlight the recent accomplishments, we have summarized the results on several important molecular species, including H 2 (D 2 , HD), CO, N 2 , NO, O 2 , H 2 O (D 2 O, HOD), CO 2 , and N 2 O. The detailed VUV photodissociation studies of these molecules are of astrochemical and atmospheric relevance. Since molecular photodissociation initiated by VUV excitation is complex and is often governed by multiple electronic potential energy surfaces, the unraveling of the complex dissociation dynamics requires state-to-state cross section measurements. The newly constructed Dalian Coherent Light Source (DCLS), which is capable of generating coherent VUV radiation with unprecedented brightness in the range of 50−150 nm, promises to propel the photodissociation experiment to the next level.

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Angle-resolved Beutler-Fano profile and dynamics for the predissociation ofH2

Cited by 12 publications

References 27 publications

Shape Resonances in H2 as Photolysis Reaction Intermediates

Shape Resonances in H2 as Photolysis Reaction Intermediates

Shape resonances in H$_2$ as photolysis reaction intermediates

Quantum state-to-state vacuum ultraviolet photodissociation dynamics of small molecules

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