LERMA-LAMAp, Université de Cergy-Pontoise, Observatoire de Paris, ENS, UPMC, UMR 8112 du CNRS, 5 mail Gay Lussac, 95000 Cergy Pontoise Cedex, France.
J Chem Phys. 2010 Sep 14;133(10):104507. doi: 10.1063/1.3484867.
Using the King and Wells method, we present experimental data on the dependence of the sticking of molecular hydrogen and deuterium on the beam temperature onto nonporous amorphous solid water ice surfaces of interstellar interest. A statistical model that explains the isotopic effect and the beam temperature behavior of our data is proposed. This model gives an understanding of the discrepancy between all known experimental results on the sticking of molecular hydrogen. Moreover, it is able to fit the theoretical results of Buch et al. [Astrophys. J. 379, 647 (1991)] on atomic hydrogen and deuterium. For astrophysical applications, an analytical formula for the sticking coefficients of H, D, H(2), D(2), and HD in the case of a gas phase at thermal equilibrium is also provided at the end of the article.
利用 King 和 Wells 方法，我们给出了关于分子氢和氘在星际非多孔无定形固体水冰表面上的附着与束流温度的实验数据。提出了一个统计模型来解释我们数据的同位素效应和束流温度行为。该模型有助于理解所有已知的关于分子氢附着的实验结果之间的差异。此外，它还能够拟合 Buch 等人的理论结果[Astrophys. J. 379, 647 (1991)]关于原子氢和氘。对于天体物理应用，在文章的最后还提供了在热平衡气相中 H、D、H(2)、D(2)和 HD 的附着系数的解析公式。
