Observation of spin-polarized atomic photofragments through the Doppler-resolved Faraday technique

Abstract

2 + 1 ) laser-induced fluorescence of spin-polarized hydrogen atoms

Collisional depolarization of OH(A) studied by Zeeman quantum beat spectroscopy

“…The good agreement with theory suggests that Zeeman beat spectroscopy might be used as a means of determining rotational orientation and alignment in OH(X) or OH(A), by suitable choice of laser pump-probe geometry. This type of application would be similar in concept to the Faraday rotation experiments of Vasyutinskii and co-workers [60,61], which provide an example of the use of the Zeeman quantum beat effect to measure photofragment angular momentum polarization.…”

Determination of all scattering phases and amplitudes in the photodissociation of a diatomic molecule

“…For most of the studies undertaken to date [6,7,9,10,12,14,15], the number of interacting molecular quantum states was limited to 2-3. In these cases, the relationship between the dynamical functions and the T-matrix amplitudes and phases is straightforward and the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 F o r P e e r R e v i e w O n l y corresponding amplitudes and phases can be relatively easily determined from experimental data; see, for example, the review paper [25].…”

“…Korovin et al [15,18] determined a single phase difference and the branching ratio of two amplitudes which completely describe the photodissociation dynamics through two molecular states of different symmetry.…”

“…Several experimental studies have reported measurements of such orientation and alignment parameters (generically referred to hereafter as anisotropy parameters) for photodissociation of a variety of diatomic systems (see, for example, [6][7][8][9][10][11][12][13][14][15][16]), and results have been used to infer certain non-adiabatic crossing probabilities and phase shifts [10], as well as the shapes of molecular potential energy curves [17]. Theoretical analysis by Balint-Kurti and coworkers [2,3] pointed the way to the determination of all amplitudes and phases of T-matrix elements, and illustrated the connection to anisotropy parameters by using wavepacket propagation to compute the photodissociation dynamics of HF and HCl.…”

Imaging detection of spin-polarized hydrogen atoms

“…This phenomenon has long been predicted [1,2], and observed in other systems [3] but only in recent years have techniques to measure the H atom spin polarization emerged. The first such determinations were inferences based upon measurements of the cofragment angular momentum polarization for diatomic systems [4,5].…”