State-Resolved Mutual Neutralization of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Mg</mml:mi></mml:mrow><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow><mml:mi mathvariant="normal">D</mml:mi></mml:mrow><mml:mo>−</mml:mo></mml:msup></mml:math>
Jon Grumer, Gustav Eklund, Anish M. Amarsi, Paul S. Barklem, Stefan Rosén, MingChao Ji, Ansgar Simonsson, Henrik Cederquist, Henning Zettergren, Henning T. Schmidt
Abstract
We present experimental final-state distributions for Mg atoms formed in ${\mathrm{Mg}}^{+}+{\mathrm{D}}^{\ensuremath{-}}$ mutual neutralization reactions at center-of-mass collision energies of $59\ifmmode\pm\else\textpm\fi{}12\text{ }\text{ }\mathrm{meV}$ by using the merged-beams method. Comparisons with available full-quantum results reveal large discrepancies and a previously underestimated total rate coefficient by up to a factor of 2 in the 0--1 eV ($<{10}^{4}\text{ }\text{ }\mathrm{K}$) regime. Asymptotic model calculations are shown to describe the process much better and we recommend applying this method to more complex iron group systems; data that is of urgent need in stellar spectral modeling.