Accession Number : AD0480856

Title :   ELASTIC SCATTERING OF 1-100 EV LITHIUM IONS IN HELIUM.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Eager, Walter J.

Report Date : 1964

Pagination or Media Count : 34

Abstract : As the initial phase in the determination of the interatomic potential function for the Lithium ion-Helium atom system the effective attenuation cross section, Q, of a Li(+) beam in He gas was measured. The energy of the incident Li(+) ion was varied from about 1 to about 100 eV and the fraction of the collimated beam, which avoided scattering in its passage through a helium filled gas cell, was measured. The length of the scattering chamber was 7.76 cm and the gas pressures were in the region of 2 to 0.020 Torr. Two slit geometries were used: (0.0635) x (1.27) cm and (0.127) x (1.27) cm; the dimensions of the entrance and exit slit being the same in each case. The values of Q decreased with increasing energy and varied from about 3 x 10 to the -16th power sq cm to about 1 x 10 to the -16th power sq cm.

Descriptors :   *ION BEAMS, *ELASTIC SCATTERING, *LITHIUM, *ION BEAMS, ATOMS, HELIUM, NUCLEAR CROSS SECTIONS, ATTENUATION, GASES, VACUUM, ION ACCELERATORS, NUCLEAR SCATTERING.

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE