A new view on positronium in polymers

被引：20
作者：
Dauwe, C
Consolati, G
Kansy, J
Van Waeyenberge, B
机构：
[1] State Univ Ghent, Dept Subatom & Radiat Phys, B-9000 Ghent, Belgium
[2] Politecn Milan, Ist Nazl Fis Mat, Dipartimento Fis, I-20133 Milan, Italy
[3] Silesian Univ, Inst Phys & Chem Met, PL-40007 Katowice, Poland
来源：
PHYSICS LETTERS A | 1998年 / 238卷 / 06期
关键词：
positron; polymer; free volume;
D O I：
10.1016/S0375-9601(97)00905-5
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
A new model is presented describing the annihilation of positronium in polymers. Ps is formed in the bulk and is trapped into the free volume holes with epithermal initial energy where it thermalizes towards its ground state. This model was verified by interpreting lifetime spectra in an amorphous cross-linked polyurethane. (C) 1998 Elsevier Science B.V.
引用
收藏
页码：379 / 384
页数：6
相关论文
共 19 条
[1]   EFFECT OF THE ENERGY-LOSS PROCESS ON THE ANNIHILATION OF ORTHOPOSITRONIUM IN SILICA AEROGEL [J].
CHANG, TB ;
XU, M ;
ZENG, XT .
PHYSICS LETTERS A, 1987, 126 (03) :189-194
[2]  
CONSOLATI G, UNPUB POLYMER
[3]   The analysis of non-exponential decay in relation to positronium thermalization [J].
Dauwe, C ;
Consolati, G ;
VanHoecke, T ;
Segers, D .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1996, 371 (03) :497-503
[4]  
Dauwe C., 1992, Materials Science Forum, V105-110, P1857, DOI 10.4028/www.scientific.net/MSF.105-110.1857
[5]  
DAUWE C, 1995, P 30 ZAK SCH PHYS, P275
[6]   FORMAL CALCULATION OF THE PICK-OFF ANNIHILATION RATE FOR ORTHOPOSITRONIUM AND PARAPOSITRONIUM [J].
DUPASQUIER, A ;
DENATALE, P ;
ROLANDO, A .
PHYSICAL REVIEW B, 1991, 43 (13) :10036-10041
[7]   THE TEMPERATURE-DEPENDENCE OF POSITRON LIFETIMES IN SOLID PIVALIC ACID [J].
ELDRUP, M ;
LIGHTBODY, D ;
SHERWOOD, JN .
CHEMICAL PHYSICS, 1981, 63 (1-2) :51-58
[8]  
GOLDANSKII VI, 1968, ATOM ENERGY REV, V6, P1
[9]   EVIDENCE FOR POSITRONIUM-LIKE BLOCH STATES IN QUARTZ SINGLE CRYSTALS [J].
GREENBER.A ;
MILLS, AP ;
THOMPSON, A ;
BERKO, S .
PHYSICS LETTERS A, 1970, A 32 (02) :72-&
[10]  
Hyodo T., 1992, Materials Science Forum, V105-110, P281, DOI 10.4028/www.scientific.net/MSF.105-110.281
12