@article {1551,
	title = {Slowing-down times and stopping powers for similar to 2-MeV mu(+) in low-pressure gases},
	journal = {Physical Review A},
	volume = {74},
	number = {4},
	year = {2006},
	note = {ISI Document Delivery No.: 101EXTimes Cited: 3Cited Reference Count: 86Senba, Masayoshi Arseneau, Donald J. Pan, James J. Fleming, Donald G.},
	month = {Oct},
	pages = {17},
	type = {Article},
	abstract = {The times taken by positive muons (mu(+)) to slow down from initial energies in the range similar to 3 to 1 MeV, to the energy of the last muonium formation, approximate to 10 eV, at the end of cyclic charge exchange, have been measured in the pure gases H-2, N-2, Ar, and in the gas mixtures Ar-He, Ar-Ne, Ar-CF4, H-2-He, and H-2-SF6, by the muon spin rotation (mu SR) technique. At 1 atm pressure, these slowing-down times, tau(SD), in Ar and N-2, vary from similar to 14 ns at the highest initial energies of 2.8 MeV to 6.5 ns at 1.6 MeV, with much longer times, similar to 34 ns, seen at this energy in H-2. Similar variations are seen in the gas mixtures, depending also on the total charge and nature of the mixture and consistent with well-established (Bragg) additivity rules. The times tau(SD) could also be used to determine the stopping powers, dE/dx, of the positive muon in N-2, Ar, and H-2, at kinetic energies near 2 MeV. The results demonstrate that the mu(+) and proton have the same stopping power at the same projectile velocity, as expected from the historic Bethe-Bloch formula, but not previously shown experimentally to our knowledge for the muon in gases at these energies. The energy of the first neutralization collision forming muonium (hydrogen), which initiates a series of charge-exchanging collisions, is also calculated for He, Ne, and Ar. The formalism necessary to describe the stopping power and moderation times, for either muon or proton, in three energy regimes-the Bethe-Bloch, cyclic charge exchange, and thermalization regimes-is developed and discussed in comparison with the experimental measurements reported here, and elsewhere. The slowing-down times through the first two regimes are controlled by the relevant ionization and charge-exchange cross sections, whereas the final thermalization regime is most sensitive to the forwardness of the elastic scattering cross sections. In this regime the slowing-down times (to kT) at nominal pressures are expected to be less than or similar to 100 ns.},
	keywords = {ALPHA-PARTICLES, BINARY THEORY, CHARGE-EXCHANGE, COMPETING PROCESSES, CROSS-SECTIONS, ELECTRON-SPIN EXCHANGE, HYDROGEN-ATOMS, MUONIUM-FORMATION, POSITIVE MUONS, RADIATION-CHEMISTRY},
	isbn = {1050-2947},
	url = {<Go to ISI>://000241723100090},
	author = {Senba, M. and Arseneau, D. J. and Pan, J. J. and Fleming, Donald G.}
}
@article {983,
	title = {Neutral particle collisional relaxation of suprathermal distributions in aeronomy},
	journal = {Planetary and Space Science},
	volume = {52},
	number = {10},
	year = {2004},
	note = {ISI Document Delivery No.: 858UKTimes Cited: 3Cited Reference Count: 46},
	month = {Aug},
	pages = {915-922},
	type = {Article},
	abstract = {There are numerous situations in laboratory experiments and in atmospheric science that are characterized by distributions of energetic neutral species with extended high-energy tails. This paper provides a detailed analysis of the relaxation of such isotropic nonequilibrium distributions of neutral species. We consider a minor constituent, referred to as the test-particle dilutely dispersed in a second component that acts as a heat bath at equilibrium. A hard sphere cross section is assumed for the collisions of the test particles and the heat bath particles, and collisions between test particles are not included in the analysis. We study the approach to equilibrium with a finite difference method of solution of the Boltzmann equation. The solution of the Boltzmann equation is also presented as an expansion in the eigenfunctions of the Boltzmann collision operator. The main objective of the paper is the calculation of the energy-dependent relaxation times for the distribution function. It is anticipated that these relaxation times will not exhibit a strong energy dependence owing to the energy-independent hard sphere cross section. This relaxation behaviour is important in the characterization of nonthermal populations of energetic atoms in aeronomy. The results are compared with a similar analysis for Coulomb collisions described in the preceeding paper. (C) 2004 Elsevier Ltd. All rights reserved.},
	keywords = {BINARY GASES, Boltzmann equation, CHARGE-EXCHANGE, distribution functions, ENERGY-TRANSFER, FAST NITROGEN-ATOMS, FOKKER-PLANCK EQUATION, HYDROGEN, KINETIC-THEORY, MARS, O(P-3) ATOMS, OXYGEN-ATOMS, relaxation times, suprathermal populations},
	isbn = {0032-0633},
	url = {<Go to ISI>://000224217300003},
	author = {Shizgal, B. D.}
}
@article {4925,
	title = {Hot atom reaction yields in Mu(*)+H-2 and T-*+H-2 from quasiclassical trajectory cross sections on the Liu-Siegbahn-Truhlar-Horowitz surface},
	journal = {Journal of Chemical Physics},
	volume = {112},
	number = {21},
	year = {2000},
	note = {ISI Document Delivery No.: 315YCTimes Cited: 7Cited Reference Count: 128},
	month = {Jun},
	pages = {9390-9403},
	type = {Review},
	abstract = {In order to provide an assessment of the "global" accuracy of the Liu-Siegbahn-Truhlar-Horowitz (LSTH) potential surface for H-3, hot atom reaction yields, which are determined from collision processes over an energy range much wider than that of single-collision experiments, have been calculated for the Mu*+H-2 and T*+H-2 systems. The isotopic comparison of muonium (Mu=mu(+)e(-)), an ultralight isotope of hydrogen (m(Mu)/m(H)approximate to 1/9), with the heaviest H-atom isotope, tritium, is a novel approach in testing the global accuracy of the H-3 surface. These reaction yields have been calculated using a formalism developed for (mu(+)) charge exchange, with input cross sections for elastic, inelastic (rovibrational excitation) and reactive collisions determined from quasi classical trajectories on the LSTH surface, in the center-of-mass energy range 0.5-11 eV. The rate of energy loss of the hot atom (Mu* or T*) due to elastic and inelastic collisions with the moderator (H-2) drastically affects the hot atom reaction yield. In particular, the forwardness of the angular differential cross section for the elastic process plays a crucial role in determining the stopping power for hot atoms. Good agreement is obtained in the absolute yields for both Mu(*)+H-2 and T-*+H-2, for the first time from microscopic cross sections, demonstrating that the LSTH surface remains surprisingly accurate over a wide range of energy and isotopic mass. (C) 2000 American Institute of Physics. [S0021- 9606(00)01920-6].},
	keywords = {CHARGE-EXCHANGE, COLLISIONS, GAS-PHASE, H+D-2->HD+D REACTION, Kinetic isotope, POTENTIAL-ENERGY SURFACE, QUANTUM-STATE DISTRIBUTIONS, RATE CONSTANTS, SHOCK TUBE TECHNIQUE, TEMPERATURE-RANGE, ZERO-POINT ENERGIES},
	isbn = {0021-9606},
	url = {<Go to ISI>://000087139700023},
	author = {Senba, M. and Fleming, Donald G. and Arseneau, D. J. and Mayne, H. R.}
}
@article {4665,
	title = {Escape of H and D from Mars and Venus by energization with hot oxygen},
	journal = {Journal of Geophysical Research-Space Physics},
	volume = {104},
	number = {A7},
	year = {1999},
	note = {ISI Document Delivery No.: 211WWTimes Cited: 12Cited Reference Count: 51},
	month = {Jul},
	pages = {14833-14846},
	type = {Article},
	abstract = {A kinetic theory collisional production model is used to determine the product velocity distributions of H and D resulting from collisional energy transfer with hot oxygen. The energetic oxygen atoms are the products of the dissociative recombination of O-2(+). Quantum mechanical cross sections for O-H and O-D collisions are used to determine the production distributions. The distributions of the particles entering a collision are assumed to be Maxwellian functions. The fraction of atoms with speeds above the escape speed is determined for Venus and Mars. For Venus, available density and temperature profiles are used to obtain estimates of the H and D escape fluxes and fractionation ratios.},
	keywords = {CHARGE-EXCHANGE, dissociative recombination, ENERGY-TRANSFER, FRACTIONATION, HYDROGEN, NITROGEN-ATOMS, O(P-3) ATOMS, REACTIVE SYSTEMS, THERMOSPHERE, UPPER-ATMOSPHERE},
	isbn = {0148-0227},
	url = {<Go to ISI>://000081185700036},
	author = {Shizgal, B. D.}
}
@article {4096,
	title = {Reaction kinetics of muonium with N2O in the gas phase},
	journal = {Journal of Physical Chemistry A},
	volume = {101},
	number = {45},
	year = {1997},
	note = {ISI Document Delivery No.: YF251Times Cited: 6Cited Reference Count: 64},
	month = {Nov},
	pages = {8470-8479},
	type = {Article},
	abstract = {The thermal reaction Mu + N2O has been studied by the muon spin rotation (mu SR) technique at temperatures from 303 to 593 K and pressures up to 60 atm. The overall reaction rate coefficient depends on the N2O pressure quadratically in pure N2O and is proportional to both the N2O partial pressure and the total pressure in mixtures, confirming the theoretical prediction of Diau and Lin that the analogous H atom reaction proceeds through two channels in this temperature range, forming different products, MuN(2)O and MuO + N-2. The measured total rate coefficients are much larger than those reported by Marshall et al. for H(D) + N2O, indicating a dramatic kinetic isotope effect, which is mainly due to the enhanced quantum tunneling of the ultralight Mu atom. Even at room temperature (and low pressure), k(Mu)/k(H) approximate to 120, the largest yet seen in comparisons of gas-phase Mu and H reactivity at such relatively high temperatures. The addition reaction forming MuN(2)O (and by implication, HN2O) contributes significantly to the total reaction rate at higher pressures but with the thermal rate coefficient remaining in the termolecular regime even at the highest pressures measured.},
	keywords = {ADDITION-REACTIONS, CHARGE-EXCHANGE, CHEMICAL-REACTION, H-ATOMS, HIGH-TEMPERATURE PHOTOCHEMISTRY, HYDROGEN-ATOMS, radicals, RATE CONSTANTS, SHOCK-TUBE, SPIN RELAXATION},
	isbn = {1089-5639},
	url = {<Go to ISI>://A1997YF25100014},
	author = {Pan, J. J. and Arseneau, D. J. and Senba, M. and Shelly, M. and Fleming, Donald G.}
}
@article {3810,
	title = {Nonthermal escape of the atmospheres of Venus, Earth, and Mars},
	journal = {Reviews of Geophysics},
	volume = {34},
	number = {4},
	year = {1996},
	note = {ISI Document Delivery No.: VU919Times Cited: 37Cited Reference Count: 188},
	month = {Nov},
	pages = {483-505},
	type = {Review},
	abstract = {Atmospheric loss from planetary atmospheres is an important geophysical problem with implications for planetary evolution. This is a multidisciplinary research field that requires an expertise in a wide range of subjects including statistical mechanics, fluid mechanics, plasma physics, collision theory, and surface science. This paper is a review of the current state of our understanding of atmospheric loss from the terrestrial planets. A detailed discussion is provided of the basic concepts required to understand the processes occurring in the high-altitude portion of a planetary atmosphere referred to as the exosphere. Light atomic species with sufficient translational energy can escape from an atmosphere. The translational energy required for escape could be thermal energy and proportional to the ambient temperature or the result of some collisional processes energizing the species above thermal energies. These collisional processes, which include charge exchange and dissociative recombination between energetic ions, neutrals, and electrons, are referred to as nonthermal escape processes. We highlight the similarities and differences in the important escape mechanisms on the terrestrial planets and comment on application of these mechanisms to evolutionary theories of the terrestrial atmospheres. The emphasis in this paper is directed toward the need to consider the exosphere as collisional.},
	keywords = {CHARGE-EXCHANGE, dissociative recombination, FRACTIONATION, HOT OXYGEN GEOCORONA, MAGNETIC-FIELD, MAGNETOHYDRODYNAMIC MODEL, MARTIAN ATMOSPHERE, mass, MULTISPECIES, NITROGEN-ATOMS, SOLAR-WIND INTERACTION, ULTRAVIOLET SPECTROMETER EXPERIMENT},
	isbn = {8755-1209},
	url = {<Go to ISI>://A1996VU91900004},
	author = {Shizgal, B. D. and Arkos, G. G.}
}
@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 = {<Go to ISI>://A1996VX71400033},
	author = {Turner, R. E. and Snider, R. F.}
}
@article {3513,
	title = {MU-SR STUDIES OF FREE-RADICALS IN THE GAS-PHASE},
	journal = {Journal of Radioanalytical and Nuclear Chemistry-Articles},
	volume = {190},
	number = {2},
	year = {1995},
	note = {ISI Document Delivery No.: QU844Times Cited: 3Cited Reference Count: 22Eotvos Workshops in Science - Nuclear Techniques in Structural ChemistryAUG 31-SEP 04, 1994BUDAPEST, HUNGARYEOTVOS LORAND UNIV, DEPT NUCL CHEM, HUNGARIAN CHEM SOC, ERTHOLD GMBH, HUNGARIAN ACAD SCI, HUNGARIAN US SCI \& TECHNOL JOINT FUND, INT SCI FDN, MINIST CULTURE \& PUBLIC EDUC, HUNGARY, NATL COMM TECHNOL DEV, HUNGARY, PHARE ACCORD},
	month = {Mar},
	pages = {493-503},
	type = {Proceedings Paper},
	abstract = {Muonium (Mu=mu(+)+e(-)) is the bound state of a positive muon and an electron. Since the positive muon has a mass about 1/9 of the proton, Mu can be regarded as an ultra light isotope of hydrogen with unusually large mass ratios (Mu:H:D:T=1/9:1:2:3). The muon spin rotation technique (mu SR) relies on the facts that (1) the muon produced in pion decay, pi(+) {\textendash}> mu(+) nu(mu), is 100\% spin polarized and (2) the positron from muon decay is emitted preferentially along the instantaneous muon spin direction at the time of the muon decay. In transverse field mu SR (TF-mu SR), the precession of the muon spin in muonium substituted radicals is directly observed by detecting decay positrons time differentially. From observed radical frequencies, the hyperfine coupling constants (A(mu)) of C(2)H(4)Mu, C(2)D(4)Mu, (13)C(2)H(4)Mu, C(2)F(4)Mu, and C(2)H(3)FMu are determined. In the longitudinal field avoided level crossing (LF-ALC) technique, one observes the resonant loss of the muon spin polarization caused by the crossing of hyperfine levels at particular magnetic fields. The LF-ALC method together with the information on A(mu) obtained from TF-mu SR allows one to determine the magnitude and sign of the nuclear hyperfine constants at alpha- and beta-positions. Results are compared with hydrogen substituted ethyl-radicals and isotope effects are discussed.},
	keywords = {CHARGE-EXCHANGE, DYNAMICS, LEVEL-CROSSING RESONANCE, muonium, SPECTRA},
	isbn = {0236-5731},
	url = {<Go to ISI>://A1995QU84400038},
	author = {Senba, M. and Arseneau, D. J. and Pan, J. J. and Shelley, M. and Fleming, Donald G.}
}
@article {2995,
	title = {RELAXATION DYNAMICS OF HOT PROTONS IN A THERMAL BATH OF ATOMIC-HYDROGEN},
	journal = {Physical Review E},
	volume = {49},
	number = {1},
	year = {1994},
	note = {ISI Document Delivery No.: MV514Times Cited: 10Cited Reference Count: 58},
	month = {Jan},
	pages = {347-358},
	type = {Article},
	abstract = {We present a rigorous kinetic theory formulation of the relaxation of hot protons (H+) in a bath of thermal atomic hydrogen (H). We apply the (well-known) quantum-mechanical scattering theory to (H+,H) collisions and calculate the differential elastic cross section as a function of collision energy and scattering angle. This calculation includes the effects Of both direct and charge-exchange scattering. We then solve the time-dependent Boltzmann equation numerically for the H+ distribution function with an initial delta-function distribution. We also consider two approximate models for the collision dynamics, each based on the assumption that charge exchange dominates the relaxation and that no momentum is transferred in a collision (the linear-trajectory approximation). The first model uses the Rapp-Francis [J. Chem. Phys. 37, 2631 (1962)] energy-dependent cross section in the exact kernel which defines the Boltzmann collision operator. The second model uses a hard-sphere cross section in an approximate collision kernel. We compare the relaxation behavior calculated with the approximate formulations with the exact solution. We also calculate the mobility of H+ in H and compare the exact and-approximate; formulations. This study has applications to processes in astrophysics and aeronomy such as the non-thermal escape of H from planetary atmospheres.},
	keywords = {CHARGE-EXCHANGE, COLLISION KERNELS, EIGENVALUES, ENERGIES, equation, ESCAPE, EXOSPHERE, TRANSPORT, VENUS},
	isbn = {1063-651X},
	url = {<Go to ISI>://A1994MV51400048},
	author = {Clarke, A. S. and Shizgal, B.}
}
@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 = {<Go to ISI>://A1994PX17900035},
	author = {Turner, R. E. and Snider, R. F.}
}
@article {7172,
	title = {KINETIC ISOTOPE EFFECTS IN GAS-PHASE MUONIUM REACTIONS},
	journal = {Acs Symposium Series},
	volume = {502},
	year = {1992},
	note = {ISI Document Delivery No.: JY550Times Cited: 16Cited Reference Count: 101},
	pages = {111-137},
	type = {Review},
	abstract = {The study of the reaction dynamics of muonium (Mu), an ultralight isotope of hydrogen ((m)Mu/(m)H almost-equal-to 1/9), provides a sensitive measure of mass effects in chemical reactions. The remarkable mass difference between Mu and the other hydrogen isotopes produces large kinetic isotope effects, providing a rigorous test of calculated potential energy surfaces (PES) and reaction rate theories. The low Mu mass also necessitates careful consideration of quantum effects, i.e. tunneling in the reaction coordinate. A review of recent results in gas phase Mu chemistry is presented, including comparison with relevant H chemistry and calculated PESs, where available. The magnitude and direction of the kinetic isotope effect is shown to be a sensitive function of the PES, particularly the height and position of the saddle point.},
	keywords = {+ HBR(DBR) ABSTRACTION, ACTION, ADDITION-REACTIONS, CALCULATIONS, CHARGE-EXCHANGE, COLLISIONS, LOW-TEMPERATURES, POTENTIAL-ENERGY SURFACES, PRESSURE-DEPENDENCE, RESONANCE, THERMAL RATE CONSTANTS, TRANSITION-STATE THEORY, TUNNELING PATHS},
	isbn = {0097-6156},
	url = {<Go to ISI>://A1992JY55000008},
	author = {Baer, S. and Fleming, Donald G. and Arseneau, D. and Senba, M. and Gonzalez, A.}
}
@article {7041,
	title = {EPITHERMAL MUONIUM PROCESSES IN METHANE AND PROPANE GASES},
	journal = {Journal of Physical Chemistry},
	volume = {95},
	number = {19},
	year = {1991},
	note = {ISI Document Delivery No.: GG383Times Cited: 7Cited Reference Count: 90},
	month = {Sep},
	pages = {7338-7344},
	type = {Article},
	abstract = {Gas-phase mu-SR studies of dense methane up to 10 mol L-1 and of propane at low densities, up to 0.2 mol L-1, are reported. It is found that the diamagnetic polarization, P(D), increases in both gases with pressure, with a related decrease seen in the muonium polarization, P(Mu). The initial increase seen in P(D) at low densities is attributed to hot-atom (Mu*) abstraction and substitution reactions. Comparisons with both hot-tritium (T*) and epithermal H* reactions in the alkanes reveal substantial isotope effects. In the case of CH4, a continued increase in P(D) at higher densities is likely due to a proton-transfer reaction from the molecular ion CH4Mu+ in the radiolysis track, forming CH3Mu, rather than to hot-atom reactions. Extrapolation of the present trend with density gives agreement with the value of P(D) found in liquid CH4, indicating that the diamagnetic muon polarization in dense alkanes depends primarily on density rather than on temperature or phase.},
	keywords = {CHARGE-EXCHANGE, CHEMISTRY, HOT-ATOM REACTIONS, HYDROCARBONS, HYDROGEN-ATOMS, LIQUIDS, POSITRONIUM, REACTION PROBABILITIES, THRESHOLD ENERGY, time},
	isbn = {0022-3654},
	url = {<Go to ISI>://A1991GG38300043},
	author = {Kempton, J. R. and Arseneau, D. J. and Fleming, Donald G. and Senba, M. and Gonzalez, A. C. and Pan, J. J. and Tempelmann, A. and Garner, D. M.}
}
@article {7042,
	title = {HOT MUONIUM AND MUON SPUR PROCESSES IN NITROGEN AND ETHANE},
	journal = {Journal of Chemical Physics},
	volume = {94},
	number = {2},
	year = {1991},
	note = {ISI Document Delivery No.: EU592Times Cited: 15Cited Reference Count: 100},
	month = {Jan},
	pages = {1046-1059},
	type = {Article},
	abstract = {Muon polarizations are reported for nitrogen and ethane over a wide pressure range from below 1 to 200 atm for N2 and up to 245 atm for C2H6. The N2 measurements were made at ambient temperature, while those for C2H6 were made at temperatures both above and below the critical temperature (305.3 K). This is the first mu-SR study of muonium and diamagnetic muon formation to cover the entire range from a low pressure gas to densities typical of liquids. The data are discussed in terms of hot atom and spur models. In the lowest pressure range, below 1.5 atm for N2 and about 10 atm for C2H6, the muonium polarization increases with pressure. This is well understood in terms of epithermal charge exchange. In N2 there is a small diamagnetic fraction, which is ascribed to the N2Mu+ molecular ion. This fraction approaches zero as the pressure is increased to 200 atm, with a corresponding increase in the muonium fraction, consistent with charge neutralization of the molecular ion by electrons from the radiolysis track. In C2H6, there is a decrease in the muonium fraction and a concomitant increase of the diamagnetic fraction with density, the changes occurring in two stages. The initial change is explained by stabilization of the vibrationally excited substitution products of hot muonium reactions. The second one is explained by proton transfer from the molecular ion adduct, C2H6Mu+ + C2H6 {\textendash}> C2H5Mu + C2H7+, trapping the muon in a diamagnetic product. Both N2 and C2H6 have a missing fraction of polarization above 10 atm, most likely due to spin exchange of Mu with paramagnetic species created in the muon track. In N2, the missing fraction is recovered at pressures beyond about 150 atm, which is explained by scavenging of electrons by positive ions. In C2H6 the missing fraction is roughly constant for densities beyond 5 mol l-1 (almost-equal-to 50 atm), and about twice the maximum found for N2. Both facts are consistent with the existence of ethyl radicals and hydrogen atoms in C2H6, which are longer lived than the spur electrons.},
	keywords = {ATOM CHEMISTRY, CHARGE-EXCHANGE, COLLISIONS, COMPETING PROCESSES, DEPOLARIZATION, HYDRATED ELECTRONS, LIQUIDS, MOLECULAR-HYDROGEN, NONPOLAR, QUANTIZED RRK THEORY, RECOIL TRITIUM REACTIONS, SPIN, UNIMOLECULAR REACTION-RATES},
	isbn = {0021-9606},
	url = {<Go to ISI>://A1991EU59200025},
	author = {Kempton, J. R. and Senba, M. and Arseneau, D. J. and Gonzalez, A. C. and Garner, D. M. and Pan, J. J. and Fleming, Donald G. and Percival, P. W. and Brodovitch, J. C. and Leung, S. K.}
}
