@article {4135,
	title = {Fast muonium reactions in solution: An electron spin exchange interaction with Cr(NCS)(6)(3-) in water and reaction with iodine in organic solvents},
	journal = {Journal of Physical Chemistry A},
	volume = {101},
	number = {26},
	year = {1997},
	note = {ISI Document Delivery No.: XG935Times Cited: 3Cited Reference Count: 34},
	month = {Jun},
	pages = {4741-4744},
	type = {Article},
	abstract = {Two reactions of muonium atoms close to the diffusion-controlled limit were analyzed as a function of solute size and solvent viscosity. With Cr(NCS)(6)(3-) as solute in water, the reaction is an electron spin-conversion process, and the observed rate is taken to be half of the actual encounter rate, because of the quantum mechanical statistical factor and the occurrence of multiple collisions due to the solvent cage effect. The encounter rate deduced is 6.2 x 10(10) M-1 s(-1), which implies a large cross section for the Cr complex. In a second series of experiments, the rate of reaction of muonium with I-2 was compared in water, methanol and n-heptane. The bimolecular rate constants determined are (1.7 +/- 0.3), (7.0 +/- 1.2), and (57 +/- 22) x 10(10) M-1 s(-1), respectively, in these three solvents. This similar to 30-fold change in rate is not matched by the change in the inverse of the solvents{\textquoteright} viscosities, which changed overall by a factor of only 2.4. It looks as if quantum tunneling dominates over classical diffusion in less polar media where muonium is unencumbered by solvent clathration.},
	keywords = {AQUEOUS-SOLUTION, COMPLEXES, HYDROGEN-ATOMS, O-2, POSITRONIUM, radicals, relaxation, ROTATION},
	isbn = {1089-5639},
	url = {<Go to ISI>://A1997XG93500012},
	author = {Stadlbauer, J. M. and Venkateswaran, K. and Porter, G. B. and Walker, D. C.}
}
@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 {6827,
	title = {MUONIUM FORMATION IN XENON AND ARGON UP TO 60 ATMOSPHERES},
	journal = {Hyperfine Interactions},
	volume = {65},
	number = {1-4},
	year = {1990},
	note = {ISI Document Delivery No.: EZ856Times Cited: 15Cited Reference Count: 265TH INTERNATIONAL CONF ON MUON SPIN ROTATION RELAXATION AND RESONANCEAPR 09-12, 1990OXFORD, ENGLAND},
	pages = {801-809},
	type = {Proceedings Paper},
	abstract = {Results of muon polarization studies in xenon and argon up to 60 atm are reported. In argon for pressures up to 10 atm, the muon polarization is best explained by an epithermal-charge exchange model. Above this pressure, the decrease in P(D) and increase in P(L) are ascribed to charge neutralization and spin exchange reactions, respectively, in the radiolysis track. Measurements with Xe/He mixtures with a xenon pressure of 1 atm indicate that the lost polarization in the pure xenon at this pressure is due to inefficient moderation of the muon. As the pressure in pure xenon is increased above 10 atm, we find that P(L) remains roughly constant and P(D) begins to increase. The lost fraction may be due to the formation of a XeMu Van der Waals type complex, while P(D) is ascribed to XeMu+ formation. This suggests that spur processes appear to be less important in xenon than in argon.},
	keywords = {CHARGE-EXCHANGE COLLISIONS, COMPETING PROCESSES, DEPOLARIZATION, GASES, HOT ATOM CHEMISTRY, HYDRATED ELECTRONS, LIQUIDS, POSITRONIUM, SPIN EXCHANGE, XE},
	isbn = {0304-3843},
	url = {<Go to ISI>://A1990EZ85600008},
	author = {Kempton, J. R. and Senba, M. and Arseneau, D. J. and Gonzalez, A. C. and Pan, J. J. and Tempelmann, A. and Garner, D. M. and Fleming, Donald G.}
}
