Abstract

A simple and reliable method to study the translational relaxation of "hot" H atoms following their production by chemical mechanisms is proposed. The problem is relevant to interstellar medium, shocks, photospheres, and atmospheric entry problems. It is shown that the thermalization of H atoms can be conveniently studied by the Monte Carlo method, including the thermal distribution of background molecules, and sets the basis for further investigations. The transport cross section is determined by the inversion of transport data. The collision density of H atoms in H2 gas is also calculated and discussed in the context of simple theories. The application of the results to astrophysical problems is outlined, including numerical results for the reaction H + H2O → H2 + OH. An approximate analytical formula for the reaction probability during H atom thermalization is proposed.

Autore Pugliese

• Longo Savino

Tutti gli autori

• LONGO S.

Titolo volume/Rivista

Non Disponibile

Anno di pubblicazione

2012

ISSN

0004-637X

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

6

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile