Accession Number : ADD010658

Title :   Production of Negative Ions of Hydrogen.

Descriptive Note : Patent,


Personal Author(s) : Garscadden,A ; Bailey,W F ; Duke,G L

Report Date : 04 Oct 1983

Pagination or Media Count : 9

Abstract : A process for generating negative ions of hydrogen isotopes is described which comprises cooling the hydrogen gas below 300 K., and preferably to about 200 K., vibrationally exciting the molecules of the gas, and the dissociating the molecules by electron impact into neutral hydrogen atoms and negative hydrogen ions. Alternatively, the gas may first be vibrationally excited by heating or the like, and then cooled translationally, for example, by rapid expansion prior to dissociation by electron impact. The processes of this invention are characterized by control of non-equilibrium conditions to obtain large increases in dissociative attachment rates by increasing the population of hydrogen gas molecules having a higher vibrational energy state.

Descriptors :   *Patents, *Ionization, *Hydrogen, *Isotopes, Anions, Cooling, Excitation, Molecules, Molecular vibration, Collisions, Electrons, Chemical dissociation, Gas ionization

Subject Categories : Inorganic Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE