Mutual neutralization of H+ and D+ with the atomic halide anions Cl−,Br−, and I−
Abstract
Mutual neutralization (MN) rate constants kMN for the reactions of H+ and D+ with the atomic halide anions Cl−, Br−, and I− were measured using the variable electron and neutral density attachment mass spectrometry technique in a flowing afterglow Langmuir probe apparatus. At 300 K, the rate constants for each reaction studied are on the order of 10−8 cm3 s−1. A trend for the rate constants of the systems in this work, kMNCl−<kMNBr−<kMN(I−), is consistent with prior studies of rare gas cation with atomic halide anion MN. A recent theoretical study involving ab initio quantum mechanical treatment of the H++Cl− and D++Cl− reactions reported rate constants significantly lower than the rates reported here. A previously proposed empirical model that predicts atom-atom kMN as a simple function of the total reaction exothermicity shows good agreement with the newly measured rate constants.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 24, 2018
- Source ID
- 10.1063/1.5036522
Entities
People
- Albert A Viggiano
- Brendan C Sweeny
- Jordan C. Sawyer
- Nicholas S Shuman
- Shaun G Ard
- Thomas M Miller
Organizations
- Air Force Office of Scientific Research
- Air Force Research Laboratory