Accession Number : AD0814412

Title :   THEORETICAL STUDIES OF HEAVY ION EXCHANGE IN AIR.

Descriptive Note : Technical rept. 15 Nov 65-15 Dec 66,

Corporate Author : GCA CORP BEDFORD MA GCA TECHNOLOGY DIV

Personal Author(s) : Dalgarno, Alexander ; Florance, Edwin T. ; Macomber, H. Kent ; Webb, T. Gordon

Report Date : MAY 1967

Pagination or Media Count : 118

Abstract : Charge exchange cross sections for fast heavy ions with atmospheric atoms have been calculated using a quantal two-state one-electron method. The principal ions considered have been singly charged Al, Fe, and U; target atoms have been N, O, and Ar. Test results are also presented for protons and alpha particles in atomic hydrogen. The electron capture cross sections computed with ls wavefunctions are compared with experimental data and with the semi-classical Bates-Mapleton theory. The quantal results have predictive value superior to the semi-classical theory; agreement with experiment is excellent, considering uncertainties in the observed cross sections. Attempts to simplify the two-state method by modelling are described and results presented. The method of calculation and details of the computer codes are elaborated in the appendices. (Author)

Descriptors :   (*IONS, ELECTRON CAPTURE), PARTICLE BEAMS, QUANTUM THEORY, NUCLEAR CROSS SECTIONS, ALPHA CROSS SECTIONS, ALPHA PARTICLES, HYDROGEN, ARGON, OXYGEN, NITROGEN, URANIUM, IRON, ALUMINUM, CHARGED PARTICLES, PROGRAMMING LANGUAGES, SUBROUTINES, DIFFERENTIAL EQUATIONS, NUMERICAL INTEGRATION, MATRICES(MATHEMATICS), PROBABILITY, APPROXIMATION(MATHEMATICS).

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE