Open AccessIsotope effect for associative detachment:H ( D ) − + H ( D ) → H 2 (
Author(s) -
Kenneth A. Miller,
H. Bruhns,
Martin Čížek,
Jiří Eliášek,
R. CabreraTrujillo,
H. Kreckel,
Aodh O'Connor,
Xavier Urbain,
D. W. Savin
Publication year - 2012
Publication title -
physical review. a, atomic, molecular, and optical physics/physical review, a, atomic, molecular, and optical physics
Language(s) - English
Resource type - Journals
eISSN - 1094-1622
pISSN - 1050-2947
DOI - 10.1103/physreva.86.032714
Subject(s) - physics , diatomic molecule , rotational–vibrational spectroscopy , kinetic isotope effect , isotope , atomic physics , molecule , deuterium , excited state , nuclear physics , quantum mechanics
We report experimental and theoretical results for associative detachment (AD) of D− + D → D2 + e−. We compare these data to our previously published results for H− + H → H2 + e−. The measurements show no significant isotope effect in the total cross section. This is to be contrasted with previously published experimental and theoreticalwork which has found a significant isotope effect in diatomic systems for partialADcross sections, i.e., as a function of the rotational and vibrational levels of the final molecule formed. Our work implies that though the rovibrational distribution of flux is different for AD of H− + H andD− + D, the total flux for these two systems is essentially the same when summed over all possible final channels