@article { ISI:000346358600005,
	title = {Zero-point energy, tunnelling, and vibrational adiabaticity in the Mu + H-2 reaction},
	journal = {MOLECULAR PHYSICS},
	volume = {113},
	number = {2},
	year = {2015},
	month = {JAN 17},
	pages = {160-175},
	abstract = {Isotopic substitution of muonium for hydrogen provides an unparalleled opportunity to deepen our understanding of quantum mass effects on chemical reactions. A recent topical review in this journal of the thermal and vibrationally state-selected reaction of Mu with H-2 raises a number of issues that are addressed here. We show that some earlier quantum mechanical calculations of the Mu + H-2 reaction, which are highlighted in this review, and which have been used to benchmark approximate methods, are in error by as much as 19\% in the low-temperature limit. We demonstrate that an approximate treatment of the Born-Oppenheimer diagonal correction that was used in some recent studies is not valid for treating the vibrationally state-selected reaction. We also discuss why vibrationally adiabatic potentials that neglect bend zero-point energy are not a useful analytical tool for understanding reaction rates, and why vibrationally non-adiabatic transitions cannot be understood by considering tunnelling through vibrationally adiabatic potentials. Finally, we present calculations on a hierarchical family of potential energy surfaces to assess the sensitivity of rate constants to the quality of the potential surface.},
	issn = {0026-8976},
	doi = {10.1080/00268976.2014.951416},
	author = {Mielke, Steven L. and Garrett, Bruce C. and Fleming, Donald G. and Truhlar, Donald G.}
}
