Effects of sample preparation on the stopping powers of Havar for protons and [alpha] particles

Journal Article · Sun May 01 04:00:00 EDT 1994 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.49.11543· OSTI ID:5007428

Porter, L E ^[1]; Rauhala, E; Raeisaenen, J ^[2]

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1. Department of Physics, Washington State University, Pullman, Washington 99164-2814 (United States)
2. Department of Physics, University of Helsinki, SF-00170 Helsinki (Finland)

The stopping powers of Havar for 0.5--2.4 MeV protons and 1.2--1.8 MeV [alpha] particles have been measured with uncertainties of a little more than 0.6% and slightly less than 0.6%, respectively. Havar foils with three different tempers---cold-rolled, annealed, and heat-treated---were used in order to learn if stopping power might be influenced by type of target foil preparation. The results indicated no such influence, since all measurements were mutually consistent. Moreover, these data were thoroughly amenable to analysis with modified Bethe-Bloch theory, which yielded generally plausible values of the parameters appearing in the modified Bethe-Bloch formula. Recommended values of these parameters are [ital I]=299.3[plus minus]3.3 eV for the mean excitation energy, and [ital b]=1.33[plus minus]0.04 with [xi]=1.0 for the two Barkas-effect parameters.

• OSTI ID: 5007428
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 49:17; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

665300* -- Interactions Between Beams & Condensed Matter-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOY-CO43CR20FE18NI13W3
ALLOYS
ALPHA PARTICLES
ANNEALING
BARYONS
BERYLLIUM ALLOYS
CARBON ADDITIONS
CHARGED PARTICLES
CHROMIUM ALLOYS
CHROMIUM BASE ALLOYS
COBALT ALLOYS
COBALT BASE ALLOYS
COLD WORKING
ELEMENTARY PARTICLES
ENERGY RANGE
FABRICATION
FERMIONS
FOILS
HADRONS
HAVAR
HEAT TREATMENTS
IRON ALLOYS
KEV RANGE
KEV RANGE 100-1000
MANGANESE ALLOYS
MATERIALS WORKING
MEV RANGE
MEV RANGE 01-10
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NUCLEONS
PROTONS
STOPPING POWER
TUNGSTEN ALLOYS