Production of negative hydrogen ions by sputtering adsorbed hydrogen from a cesiated molybdenum surface

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.26.1· OSTI ID:5044448

Seidl, M; Pargellis, A

We have investigated the production of negative hydrogen ions by bombarding hydrogen adsorbed onto a cesiated molybdenum surface with positive cesium ions. The negative hydrogen yields are measured as a function of hydrogen gas pressure, cesium coverage, and energy of the incident cesium ions. The optimum yield obtained was 0.4 for 750-eV cesium ions bombarding hydrogen adsorbed onto the molybdenum surface covered with 0.65 monolayers of cesium. It is observed that the sticking coefficient of hydrogen decreases as the cesium coverage increases. We measure the energy distribution of the negative hydrogen ions as they leave the surface. The energy spread is about 0.5% of the incident cesium-ion energy. We compare our results for the production probability of negative hydrogen ions with the results obtained by Hiskes and Schneider.

• Research Organization: Stevens Institute of Technology, Department of Physics and Engineering Physics, Hoboken, New Jersey 07030
• OSTI ID: 5044448
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 26:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

640301* -- Atomic
Molecular & Chemical Physics-- Beams & their Reactions
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ADSORPTION
ANIONS
CESIUM IONS
CHARGED PARTICLES
COLLISIONS
DATA
ELEMENTS
ENERGY RANGE
ENERGY SPECTRA
EV RANGE
EV RANGE 100-1000
EXPERIMENTAL DATA
FUNCTIONS
HYDROGEN
HYDROGEN IONS
HYDROGEN IONS 1 MINUS
INFORMATION
ION SOURCES
IONS
METALS
MOLYBDENUM
NONMETALS
NUMERICAL DATA
PRESSURE DEPENDENCE
SORPTION
SPECTRA
SPUTTERING
TRANSITION ELEMENTS
WORK FUNCTIONS
YIELDS