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Charge changing and excitation cross sections for 1-25 KeV hydrogen ions and atoms incident on sodium

Thesis/Dissertation ·
OSTI ID:6467453
Measurements of charge changing and excitation cross sections for 1-25 keV beams of hydrogen atoms and ions incident on a sodium vapor target are reported. The charge changing cross sections are for reactions in which the incident H ion or atom gains or loses an electron during a collision with a Na atoms to form a hydrogen ion or atom in a different charge state. The six cross sections measured are sigma/sub +0/ and sigma/sub +-/ for incident protons, sigma/sub -0/ and sigma/sub -+/ for incident H/sup -/ ions, and sigma/sub g-/ and sigma/sub g+/ for incident H(1s) atoms. Measurements are also reported for the negative, neutral, and positve equilibrium fractions for H beams in thick Na targets. The excitation cross sections are for reactions in which the Na target atom is excited to the 3p level by a collision with a H atom or ion. The five cross sections measured are for incident H/sup +/, H/sub 2//sup +/, H/sub 3//sup +/, and H/sup -/ ions, and for H(1s) atoms. These cross sections are measured using a new technique that compares them directly to the known cross section for excitation by electron impact.
Research Organization:
Wisconsin Univ., Madison (USA)
OSTI ID:
6467453
Country of Publication:
United States
Language:
English