Temperature and irradiation effects on positronium formation in polycarbonate

被引：9
|
作者：
Chen, ZQ
Suzuki, T
Uedono, A
Tanigawa, S
Ito, Y
机构：
[1] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3058573, Japan
[2] KEK, Radiat Sci Ctr, Tsukuba, Ibaraki 3050801, Japan
[3] Univ Tokyo, Res Ctr Nucl Sci, Tokai, Ibaraki 3191106, Japan
来源：
POSITRON ANNIHILATION - ICPA-12 | 2001年 / 363-3卷
关键词：
free volume; polycarbonate; positron annihilation;
D O I：
10.4028/www.scientific.net/MSF.363-365.297
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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 230K, which was attributed to the brittle ductile transition.
引用
收藏
页码：297 / 299
页数：3
相关论文
共 50 条
  • [21] Influence of positron irradiation on positronium formation in n-alkanes
    Pietrow, M.
    Zgardzinska, B.
    ACTA PHYSICA POLONICA A, 2006, 110 (05) : 641 - 648
  • [22] The effects of multicharged ion irradiation on a polycarbonate surface
    Srinadhu, E. S.
    Kulkarni, D. D.
    Field, D. A.
    Harriss, J. E.
    Sosolik, C. E.
    RADIATION EFFECTS AND DEFECTS IN SOLIDS, 2019, 174 (3-4): : 205 - 213
  • [23] Free-volume distribution and positronium formation in amorphous polymers: Temperature and positron-irradiation-time dependence
    Wang, CL
    Hirade, T
    Maurer, FHJ
    Eldrup, M
    Pedersen, NJ
    JOURNAL OF CHEMICAL PHYSICS, 1998, 108 (11): : 4654 - 4661
  • [24] Positronium bubble formation in room temperature ionic liquids
    Hirade, T.
    Oka, T.
    16TH INTERNATIONAL CONFERENCE ON POSITRON ANNIHILATION (ICPA-16), 2013, 443
  • [25] TIME-OF-FORMATION EFFECTS IN ULTRARELATIVISTIC POSITRONIUM
    NEMENOV, LL
    SOVIET JOURNAL OF NUCLEAR PHYSICS-USSR, 1990, 51 (02): : 284 - 288
  • [26] INTRASPUR EFFECTS IN POSITRONIUM FORMATION IN NONPOLAR LIQUIDS
    ITO, Y
    TABATA, Y
    RADIOCHIMICA ACTA, 1988, 43 (02) : 65 - 67
  • [27] Extra formation of positronium in amorphous polymers at low temperature
    Laforest, N.
    Bas, C.
    De Baerdemaker, J.
    Djourelov, N.
    Dauwe, C.
    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS, 2011, 248 (06): : 1459 - 1463
  • [28] SOLVENT EFFECTS IN POSITRONIUM COMPLEX-FORMATION
    ALFASSI, ZB
    ACHE, HJ
    RADIATION PHYSICS AND CHEMISTRY, 1987, 29 (02): : 131 - 135
  • [29] Plasma-screening effects on positronium formation
    Ma, Jia
    Wang, Yuan-Cheng
    Zhou, Ya-Jun
    Wang, Heng
    CHINESE PHYSICS B, 2018, 27 (01)
  • [30] EFFECTS OF AGING AND OXIDATION ON POSITRONIUM FORMATION IN POLYETHYLENES
    SUZUKI, T
    OKI, Y
    NUMAJIRI, M
    MIURA, T
    KONDO, K
    ITO, Y
    SHIOMI, Y
    RADIATION PHYSICS AND CHEMISTRY, 1994, 43 (06): : 557 - 562
12345