THE CROSS SECTION FOR THE FORMATION OF H2(+) IN THE REACTION OF FAST PROTONS WITH METHANE.
Abstract
The capture cross section for the formation of H2(+) in the reaction H(+) + CH4 yields H2(+) + CH3 was measured at incident proton energies of 70, 85, 100, 150 and 200 eV and covering the scattering angles of 43 deg to 49.5 deg (lab coordinates). At 100 eV and below the curve of the cross section versus angle shows a sharp peak at about 46 deg whose position approaches the theoretical limit of 46.9 deg with increasing energy. Above 100 eV the peak was too small to be observed and only an upper limit can be placed on the value of the cross section. Typical values of the total cross section are 2.0 x 10 to the -21st sq cm at 70 eV and 7.6 x 10 to the -22nd at 100 eV. The magnitude and energy dependence of the cross section as well as the angular position of the peak all are in essential agreement with the classical theory of ion-molecule rearrangement collisions proposed by Bates, Cook and Smith. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1969
- Accession Number
- AD0700272
Entities
People
- Norman Robert Anton Smyth
Organizations
- Naval Postgraduate School