Published 2001
| Version v1
Journal article
Temperature and irradiation effects on positronium formation in polycarbonate
- 1. Radiation Science Center, (KEK), Tsukuba, Ibaraki (Japan)
- 2. Inst. of Physics, Univ. of Tsukuba, Ibaraki (Japan)
- 3. Research Center for Nuclear Science, Tokyo Univ., Tokai, Ibaraki (Japan)
Description
Positron annihilation lifetime spectra were measured for polycarbonate as a function of temperature and measuring time. Free radicals and trapped electrons were introduced by positron irradiation at room temperature and low temperature, respectively. Free radicals prohibited the formation of positronium (Ps), while the trapped electrons enhanced the Ps formation. A new transition was observed at 230 K, which was attributed to the brittle ductile transition. (orig.)
Additional details
Publishing Information
- Journal Title
- Materials Science Forum
- Journal Volume
- 363-365
- Journal Page Range
- p. 297-299
- ISSN
- 0255-5476
- CODEN
- MSFOEP
Conference
- Title
- 12. international conference on positron annihilation
- Acronym
- ICPA-12
- Dates
- 6-12 Aug 2000
- Place
- Munich (Germany)
INIS
- Country of Publication
- Switzerland
- Country of Input or Organization
- Switzerland
- INIS RN
- 32031015
- Subject category
- S36: MATERIALS SCIENCE;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- ANNIHILATION; DUCTILE-BRITTLE TRANSITIONS; LIFETIME; POLYCARBONATES; POSITRONS; RADIATION EFFECTS; RADICALS; TEMPERATURE RANGE 0273-0400 K; TRAPPED ELECTRONS
- Descriptors DEC
- ANTILEPTONS; ANTIMATTER; ANTIPARTICLES; CARBON COMPOUNDS; CARBONATES; ELECTRONS; ELEMENTARY PARTICLES; FERMIONS; INTERACTIONS; LEPTONS; MATTER; ORGANIC COMPOUNDS; ORGANIC POLYMERS; OXYGEN COMPOUNDS; PARTICLE INTERACTIONS; POLYMERS; TEMPERATURE RANGE
Optional Information
- Notes
- 14 refs.