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

Abstract

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.

The dynamical study of O(1D) + HCl(v = 0, j = 0) reaction at hyperthermal collision energies

“…The results for R1 and R2 reactions are found to be quite different due to the different dynamical reaction channels, which can also be observed in the two (HF and DF) product channels of F + HD reaction [35]. …”

“…The PRDs of R2 reaction show much broader ranges than those of R1 reaction due to larger polarization properties for R2 as mentioned above. For the Li + HF → Li + F reaction (which also belongs to Heavy heavy-Light (HHL) scheme), LiF product is also produced in highly excited states [35,36]. …”

“…[35-37], vector correlation of angular momentum orientation and alignment in chemical reactions can provide rich information on the reaction dynamics. By analyzing the alignment parameters, two angular distributions ( P ( θ r ) and P ( φ r )), and PDDCS 00 , we can get a view of the stereodynamical information of the title reaction.…”

“…This is a typical feature of the HHL system [6,26,35,36]. A significant feature of this kind of reaction is the kinematic limit, i.e.…”

Depolarizing Collisions With Hydrogen: Neutral and Singly Ionized Alkaline Earths

“…In this equation, σ 0 is the collisional cross-section averaged over the isotropic distribution of H atoms depending on the collisional energy defined as (Balint-Kurti & Vasyutinskii 2009;González-Sánchez et al 2011;Krasilnikov et al 2013)…”