@article {4670,
title = {Moderately dense gas transport coefficients via time correlation functions. I. General formalism},
journal = {Journal of Chemical Physics},
volume = {111},
number = {15},
year = {1999},
note = {ISI Document Delivery No.: 244LBTimes Cited: 3Cited Reference Count: 35},
month = {Oct},
pages = {6909-6921},
type = {Article},
abstract = {A new method is developed for deriving first order density corrections to gas transport coefficients using the time correlation function formalism. In a moderately dense gas, both kinetic and potential contributions to the flux are significant. This article extends the projection operator technique developed in our previous work for purely kinetic flux operators [J. Chem. Phys. 109, 3452 (1998)] to include the effects of the potential contribution to the flux. The method introduces two projection operators, one for each of the kinetic and potential flux contributions, with the consequence that the calculation of a transport coefficient involves a matrix associated with the two flux contributions, and the inversion of this matrix. The binary collision expansion of the resolvent in each of the matrix elements allows a transport coefficient at moderate gas densities to be expressed in terms of integrals over functions of the intermolecular potential. In the following article, it is shown that these results are consistent (that is, within a similar level of approximation of the integrals) with the known density corrections for the coefficients of viscosity and thermal conductivity. (C) 1999 American Institute of Physics. [S0021-9606(99)51438-4].},
keywords = {formulation, IRREDUCIBLE CARTESIAN TENSORS},
isbn = {0021-9606},
url = {://000083051600028},
author = {Snider, R. F. and Alavi, S.}
}
@article {4423,
title = {Theory of muon spin relaxation of Mu+CO},
journal = {Physical Review A},
volume = {58},
number = {6},
year = {1998},
note = {ISI Document Delivery No.: 145CDTimes Cited: 5Cited Reference Count: 35},
month = {Dec},
pages = {4431-4446},
type = {Article},
abstract = {In previous papers [Phys. Rev. A 50, 4743 (1994); 54, 4815 (1996)] a theoretical description of the signals associated with the muon spin relaxation of simple muonated gaseous radicals has been presented. These gaseous radicals were assumed to have been formed during the slowing down process of the muons in the gaseous target and assumed to be stable chemical species at the initial observation time. The observed signals were attributed to these stable radicals. In this paper the theoretical description is extended to include situations where the radicals are formed in slow processes as opposed to fast processes with the assumption that the muon exists as muonium at the initial observation time. This muonium then reacts for the time duration of the experiment, which is limited by the muon{\textquoteright}s lifetime. The theoretical treatment is based on an operator expansion of the spin density operators for muonium and for the molecular radicals whose time dependences are described by a set of coupled linearized quantum kinetic equations. Relaxation of the signals is due to two effects, namely, the chemical reactions themselves and the collisions that reorient the molecular radical{\textquoteright}s rotational angular momentum. This affects the muon{\textquoteright}s spin via intramolecular couplings between the muon{\textquoteright}s spin, the radical{\textquoteright}s free-electron spin, and the radical{\textquoteright}s rotational angular momentum. The coefficients of the radical{\textquoteright}s spin Hamiltonian, the collisional reorientation lifetimes (cross sections), and the chemical reaction rates may be used as fitting parameters to describe the experimental signals. These could also be calculated from first principles. [S1050-2947(98)00212-1].},
keywords = {EXCHANGE, GAS-PHASE, IRREDUCIBLE CARTESIAN TENSORS, O-2, radicals, REACTION-KINETICS},
isbn = {1050-2947},
url = {://000077352700025},
author = {Turner, R. E. and Snider, R. F.}
}
@article {3837,
title = {Theory of muon spin relaxation of gaseous C(2)H(4)Mu},
journal = {Physical Review A},
volume = {54},
number = {6},
year = {1996},
note = {ISI Document Delivery No.: VX714Times Cited: 5Cited Reference Count: 32},
month = {Dec},
pages = {4815-4829},
type = {Article},
abstract = {A theoretical study of the muon spin relaxation of the gaseous muonated ethyl radical C(2)H(4)Mu is expanded in this paper to include both longitudinal and transverse signals. This study is based upon an operator expansion of the spin-density operator for the radical with its time dependence described by the linearized quantum Boltzmann equation. Relaxation is due to collisions which reorient the radical{\textquoteright}s rotational angular momentum while effects on the muon{\textquoteright}s spin are due to couplings between the muon{\textquoteright}s spin, the radical{\textquoteright}s free-electron spin, and the radical{\textquoteright}s rotational angular momentum. The coefficients of the radical{\textquoteright}s spin Hamiltonian and the collisional lifetimes (cross sections) are used as fitting parameters to describe the transverse signals. A fit to the transverse data by itself and a global fit to both the transverse and longitudinal data are obtained with good accuracy.},
keywords = {CHARGE-EXCHANGE, CONSTANTS, FREE-RADICALS, GAS-PHASE, IRREDUCIBLE CARTESIAN TENSORS, KINETIC-EQUATIONS, PRESSURE-DEPENDENCE, RESONANCE},
isbn = {1050-2947},
url = {://A1996VX71400033},
author = {Turner, R. E. and Snider, R. F.}
}
@article {3183,
title = {THEORY OF MUON SPIN RELAXATION OF SIMPLE GASEOUS FREE-RADICALS},
journal = {Physical Review A},
volume = {50},
number = {6},
year = {1994},
note = {ISI Document Delivery No.: PX179Times Cited: 9Cited Reference Count: 30Part A},
month = {Dec},
pages = {4743-4754},
type = {Article},
keywords = {CHARGE-EXCHANGE, CONSTANTS, GAS-PHASE, IRREDUCIBLE CARTESIAN TENSORS, KINETIC-EQUATIONS, PRESSURE-DEPENDENCE},
isbn = {1050-2947},
url = {://A1994PX17900035},
author = {Turner, R. E. and Snider, R. F.}
}