Transmitted positron reemission from a thin single-crystal Ni(100) foil

Journal Article · Tue Jul 01 00:00:00 EDT 1986 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.34.442· OSTI ID:5567806

Schultz, P J; Gullikson, E M; Mills, Jr, A P

We have investigated the reemission of positrons from a 1500-A-circle-thick unsupported Ni(100) foil irradiated with a collimated beam of positrons of variable energy 0 to 6 keV. At 5 keV, (19 +- 3)% of the positrons emerge with low energy from the transmission side of the foil; roughly-equal55% of the slow-positron spectrum is concentrated in a 0.2-eV-wide peak at 1.1 eV. The Ni(100) foil remoderator is as efficient as the W(100) foils investigated by Chen e-italict-italic a-italicl-italic. (Phys. Rev. B 31, 4123 (1985)) and had only one-third of the spread in energy. Foils of this type will thus be very useful for brightness-enhancement stages using transmission remoderation.

• Research Organization: Department of Physics, University of Western Ontario, London, Ontario N6A 3K7, Canada
• OSTI ID: 5567806
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 34:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CHARGED-PARTICLE TRANSPORT
CRYSTALS
ELEMENTARY PARTICLES
ELEMENTS
EMISSION
ENERGY RANGE
FERMIONS
FOILS
IRRADIATION
KEV RANGE
LEPTONS
METALS
MONOCRYSTALS
NICKEL
POSITRONS
RADIATION TRANSPORT
TRANSITION ELEMENTS
TRANSMISSION