Bulk defect analysis with a high-energy positron beam

Journal Article · Thu Jun 10 00:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59252· OSTI ID:21207967

Hartley, J H; Howell, R H; Sterne, P A ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)

A program using a positron beam to probe defects in bulk materials has been developed at Lawrence Livermore National Laboratory. Positron annihilation lifetime spectroscopy (PALS) provides non-destructive analysis of average defect size and concentration. A 3 MeV positron beam is supplied by Sodium-22 at the terminal of a Pelletron accelerator. The high-energy beam allows large ({>=}1 cm{sup 2}) engineering samples to be measured in air or even sealed in an independent environment. A description of the beam-PALS system will be presented along with a summary of recent measurements.

• OSTI ID: 21207967
• Journal Information: AIP Conference Proceedings, Vol. 475, Issue 1; Conference: 15. international conference on the application of accelerators in research and industry, Denton, TX (United States), 4-7 Nov 1998; Other Information: DOI: 10.1063/1.59252; (c) 1999 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ANNIHILATION
DEFECTS
GAMMA SPECTRA
GAMMA SPECTROSCOPY
LAWRENCE LIVERMORE NATIONAL LABORATORY
LINEAR ACCELERATORS
MEV RANGE
NONDESTRUCTIVE ANALYSIS
PELLETRON ACCELERATORS
POSITRON BEAMS
POSITRON-ATOM COLLISIONS
POSITRONIUM
SODIUM 22