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Titolo:
Application of a pulsed slow-positron beam to low-density polyethylene film
Autore:
Hamada, E; Oshima, N; Katoh, K; Suzuki, T; Kobayashi, H; Kondo, K; Kanazawa, I; Ito, Y;
Indirizzi:
Ibaraki Prefectural Univ Hlth Sci, Dept Radiol Sci, Ami, Ibaraki 3000394, Japan Ibaraki Prefectural Univ Hlth Sci Ami Ibaraki Japan 3000394 000394, Japan RIKEN, Inst Phys & Chem Res, Atom Phys Lab, Wako, Saitama 3510198, Japan RIKEN Wako Saitama Japan 3510198 m Phys Lab, Wako, Saitama 3510198, Japan KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki 3050801, Japan KEKTsukuba Ibaraki Japan 3050801 es Org, Tsukuba, Ibaraki 3050801, Japan Tokyo Gakugei Univ, Dept Phys, Koganei, Tokyo 1840015, Japan Tokyo GakugeiUniv Koganei Tokyo Japan 1840015 anei, Tokyo 1840015, Japan Univ Tokyo, Res Ctr Nucl Sci & Technol, Tokai, Ibaraki 3191106, Japan UnivTokyo Tokai Ibaraki Japan 3191106 nol, Tokai, Ibaraki 3191106, Japan
Titolo Testata:
ACTA PHYSICA POLONICA A
fascicolo: 3-4, volume: 99, anno: 2001,
pagine: 373 - 378
SICI:
0587-4246(200103/04)99:3-4<373:AOAPSB>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
SUBSURFACE REGION; OPEN SPACES; THIN-FILMS; ANNIHILATION; POLYPROPYLENE; SURFACE; POLYMERS; SYSTEM;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Hamada, E Ibaraki Prefectural Univ Hlth Sci, Dept Radiol Sci, Ami, Ibaraki3000394, Japan Ibaraki Prefectural Univ Hlth Sci Ami Ibaraki Japan 3000394 pan
Citazione:
E. Hamada et al., "Application of a pulsed slow-positron beam to low-density polyethylene film", ACT PHY P A, 99(3-4), 2001, pp. 373-378

Abstract

A pulsing system for a slow-positron beam was applied to study the region near the surface of low-density polyethylene film using positron-annihilation lifetime measurement. The lifetime and intensity of ortho-positronium near the surface were measured as a function of the incident positron energy (1.6-9.1 keV). The size of intermolecular spaces in the surface region (similar to 1500 nm) was larger than that in the bulk region. This tendency wasespecially strong in the region around 200 nm below the surface. On the other hand, the intensity of ortho-positronium decreased at lower incident positron energies, which was attributed to a decrease in the density of the spur electrons and/or an increase in the number of reemitted positrons from the surface.

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Documento generato il 09/04/20 alle ore 00:01:38