Title

Laboratory Synthesis of Molecular Hydrogen on Surfaces of Astrophysical Interest

Author(s)/Creator(s)

Gianfranco Vidali, Syracuse University
V Pirronello, Universita di Catania
Chi Liu, Syracuse University
Liyong Shen, Syracuse University

Document Type

Article

Date

11-7-1996

Keywords

TBD

Language

English

Disciplines

Physics

Description/Abstract

We report on the first results of experiments to measure the recombination rate of hydrogen on surfaces of astrophysical interest. Our measurements give lower values for the recombination efficiency (sticking probability S x probability of recombination upon H-H encounter \gamma) than model-based estimates. We propose that our results can be reconciled with average estimates of the recombination rate (1/2 n(H) n(g) v(H)A S \gamma) from astronomical observations, if the actual surface of an average grain is rougher, and its area bigger, than the one considered in models.

Additional Information

13 pages plus 5 figures (only change: this version has 5 figures included); this paper is to appear in Astrophysical Journal Letters. More information at http://arxiv.org/abs/astro-ph/9611022

Recommended Citation

Vidali, Gianfranco; Pirronello, V; Liu, Chi; and Shen, Liyong, "Laboratory Synthesis of Molecular Hydrogen on Surfaces of Astrophysical Interest" (1996). Physics - All Scholarship. 513.
https://surface.syr.edu/phy/513

Source

Harvested from Arxiv.org

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.