Evidence for Scattering Resonances in the H+D2 Reaction

The observation of quantum bottleneck states

“…The complex then decays in the forward direction leading to a peak at ¼ 0 when account is taken of the 1/sin geometric weighting factor. Althorpe et al [38,39] and Zare and co-workers [47] have investigated the dynamics of the H þ D 2 reaction using an approach that also combined theoretical and experimental efforts. The experiments were carried out using the PHOTOLOC (photo-initiated reaction analysed via the law of cosines) technique [48] with a (2 þ 1) REMPI time-of-flight detection scheme.…”

Stereomutation dynamics in hydrogen peroxide

“…This question has been addressed from a variety of points of view, and Jö rn Manz and his group have been early players in the field, including both bimolecular and unimolecular reactions [24][25][26]. Mode selective chemistry has been discussed for some very simple systems such as O 3 [27] and H 2 O isotopomers as well as other examples [28][29][30][31][32][33]. Among the important early developments we may mention also the demonstration, on the basis of fs wavepackets derived from high resolution spectroscopic experiment, of mode selective intramolecular vibrational redistribution as a primary process in chemical kinetics [34,35] one-dimensional quantum wavepackets [36,37] as well as multidimensional kinetics of polyatomic molecules in isolation and under condensed phase condition, a development which was well honored as time proceeded [38][39][40][41].…”

The Hydrogen Games and Other Adventures in Chemistry

“…By the photoloc technique, we obtained differential cross sections for a number of product states of the hydrogen atom-hydrogen molecule bimolecular exchange reaction (26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)(38)(39)(40). Further significant improvements involved the use of a position-sensitive detector (41).…”

“…The expectation is that products in low rotational levels are back-scattered, whereas those in higher rotational levels are side-scattered. It was a great surprise to find that at certain collision energies, there was a pronounced forward-scattered peaking in the differential cross section for the HD(v = 3, j = 0) product of the H + D 2 reaction at a center of mass collision energy of 1.64 eV (30)(31)(32)(33). This feature was reproduced by full quantum calculations and attributed to a time-delayed scattering mechanism.…”