Intermediate state polarization in multiphoton ionization of HCl

Chichinin, A. I.; Shternin, P. S.; Goedecke, Niels; Kauczok, S.; Maul, C.; Vasyutinskiǐ, O. S.; Gericke, Karl‐Heinz

doi:10.1063/1.2218336

Cited by 38 publications

(67 citation statements)

References 49 publications

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“…A compact and convenient spherical tensor expression for the intensity of the REMPI 2 + 1 signal which is valid for the pure linearly, or circularly polarized probe light can be written in the form 102,103 …”

Section: Appendix: Detection Of the Reaction Product Angular Momentummentioning

confidence: 99%

Polarization of molecular angular momentum in the chemical reactions Li + HF and F + HD

Krasilnikov

Popov

Roncero

et al. 2013

The Journal of Chemical Physics

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The quantum mechanical approach to vector correlation of angular momentum orientation and alignment in chemical reactions [G. Balint- (2011)] reactions for which accurate scattering information has become recently available through time-dependent and time-independent approaches. Application of the theory to two important particular cases of the reactive collisions has been considered: (i) the influence of the angular momentum polarization of reactants in the entrance channel on the spatial distribution of the products in the exit channel and (ii) angular momentum polarization of the products of the reaction between unpolarized reactants. In the former case, the role of the angular momentum alignment of the reactants is shown to be large, particularly when the angular momentum is perpendicular to the reaction scattering plane. In the latter case, the orientation and alignment of the product angular momentum was found to be significant and strongly dependent on the scattering angle. The calculation also reveals significant differences between the vector correlation properties of the two reactions under study which are due to difference in the reaction mechanisms. In the case of F + HD reaction, the branching ratio between HF and DF production points out interest in the insight gained into the detailed dynamics, when information is available either from exact quantum mechanical calculations or from especially designed experiments. Also, the geometrical arrangement for the experimental determination of the product angular momentum orientation and alignment based on a compact and convenient spherical tensor expression for the intensity of the resonance enhanced multiphoton ionization (REMPI 2 + 1) signal is suggested. © 2013 AIP Publishing LLC.

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Section: Appendix: Detection Of the Reaction Product Angular Momentummentioning

confidence: 99%

Polarization of molecular angular momentum in the chemical reactions Li + HF and F + HD

Krasilnikov

Popov

Roncero

et al. 2013

The Journal of Chemical Physics

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“…), see [7,8,[11][12][13][14][15][16] and references therein, however a number of studies have been carried out in the gas phase [17][18][19][20][21][22][23][24][25]. The gas phase/molecular beam studies are of fundamental importance for understanding the TPEF dynamics of polyatomic molecules in the collision-free regime because they can be supported by high accuracy quantum mechanical ab initio calculations which in most cases are not available for the condensed matter studies.…”

Section: Introductionmentioning

confidence: 99%

The polarisation of two-photon excited fluorescence in rotating molecules

2010

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We report a general theory of the two-photon excited fluorescence (TPEF) of rotating molecules under the condition of anisotropic depolarisation. The obtained expressions for the TPEF intensity are based upon the spherical tensor approach and valid for any symmetric, or asymmetric top molecule and for any photon polarisation. The expressions are written in terms of the molecular parameters M K (R, R 0 , t) which have clear tensor notation and contain all molecular information that can be extracted from the TPEF experiments. Two important extreme cases are discussed. If the molecular rotation period is much larger than the excited state lifetime, the obtained expressions describe the TPEF in non-rotating molecules under the condition of isotropic relaxation. The time-independent part of these expressions is in agreement with the earlier results of McClain [J. Chem. Phys., 58, 324 (1973)]. The relationship between McClain's molecular parametersQ i and the parameters M K (R, R 0 , 0) is presented and analysed. If the molecular rotation period is much smaller than the excited state lifetime, the expressions describe anisotropy of fluorescence from isolated ro-vibrational molecular states. As shown, under certain approximations the expression still can be written in terms of the M-parameters which are reduced due to molecular rotation by about a factor of (2K þ 1). This result manifests that the fluorescence anisotropy is reduced, but not lost due to the molecular rotation.

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“…The angular momentum polarization produced by twophoton absorption can be described by formalisms outlined by Manzhos et al [1] and by Chichinin et al [21]. In the axial recoil approximation the angular photoproduct distribution can be presented as a product of the excited state axis spatial distribution and the angular distribution of the photofragments produced via photolysis from an unpolarized excited state.…”

Section: Angular Distributions Of Photoproductsmentioning

confidence: 99%

“…Following the formalism outlined by Chichinin et al [21] one obtains for the observed angular distribution of the photoproduct P(θ):…”

Section: Angular Distributions Of Photoproductsmentioning

confidence: 99%

See 1 more Smart Citation

Multiphoton Ionization and Fragmentation of Hydrogen Chloride: A Diatomic Still Good for a Surprise

Maul

Chichinin

Gericke

2011

Journal of Atomic, Molecular, and Optical Physics

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The competition between multiphoton ionization and fragmentation in the diatomic molecule hydrogen chloride is reviewed. Emphasis is laid on recent experimental results employing chemical imaging methods in order to obtain kinetic energy distributions and angular distributions of photoproducts. The energy range considered is 15 to 20 eV, equivalent to the absorption of three or four photons in the ultraviolet wavelength range. The role of Rydberg states as resonantly excited intermediate states in the ionization/fragmentation processes is assessed. Mixing among 1 Σ + states gives rise to peculiarly shaped double minimum potential energy curves which allow for the production of hydrogen and chlorine atomic and ionic fragments via several competing pathways, in addition to the production of molecular HCl + ions. States with different electronic properties show a qualitatively different behaviour from Σ + states. Accidental resonances between states of differing orbital angular momentum or multiplicity serve to override these differences and cause subtle as well as significant deviations from the unperturbed behaviour.

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Intermediate state polarization in multiphoton ionization of HCl

Cited by 38 publications

References 49 publications

Polarization of molecular angular momentum in the chemical reactions Li + HF and F + HD

Polarization of molecular angular momentum in the chemical reactions Li + HF and F + HD

The polarisation of two-photon excited fluorescence in rotating molecules

Multiphoton Ionization and Fragmentation of Hydrogen Chloride: A Diatomic Still Good for a Surprise

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