IHEP OpenIR  > 多学科研究中心
Positron irradiation effect on positronium formation in gamma-irradiated LDPE and unplasticized PVC
Yang J(杨静); Zhang P(张鹏); Cao XZ(曹兴忠); Yu RS(于润升); Wang BY(王宝义); Yang, J; Zang, P; Cao, XZ; Yu, RS; Wang, BY
2017
Source PublicationRADIATION PHYSICS AND CHEMISTRY
ISSN0969-806X
Volume135Pages:121-126
SubtypeArticle
AbstractPositron irradiation effects on positronium formation in low-density polyethylene (LDPE), gamma-irradiated LDPE and unplasticized PVC (UPVC) are studied. At least in one of the three different measurements, i.e., prolonged positron annihilation measurement at room temperature, low temperature in darkness and subsequent measurement under light, changes in o-Ps intensity are observed in non-irradiated LDPE and gamma-irradiated LDPE. While in UPVC, change in o-Ps intensity is hardly observable in all the above mentioned three measurements. Reduction of o-Ps intensity by light indicates that positronium formation via the recombination of a positron and a trapped electron exists in LDPE and gamma-irradiated LDPE. The absence of light bleaching effect, together with the fact that the value of o-Ps intensity in heating and cooling process of a thermal circle is nearly the same, indicates that in UPVC, positronium can not be formed through trapped electron mechanism. This study highlights the speciality of positronium formation in UPVC, positronium is formed exclusively by the recombination of electron-positron pairs with short separations.
KeywordPositron irradiation effect Positronium formation Temperature Light
DOI10.1016/j.radphyschem.2017.02.002
WOS KeywordANNIHILATION LIFETIME ; TRAPPED ELECTRONS ; PS FORMATION ; POLYETHYLENE ; TEMPERATURE ; POLYPROPYLENE ; POLYMERS ; RELAXATION ; TRANSITION ; RADIATION
Indexed BySCI ; EI ; SCOPUS ; ADS
Language英语
WOS Research AreaChemistry ; Nuclear Science & Technology ; Physics
WOS SubjectChemistry, Physical ; Nuclear Science & Technology ; Physics, Atomic, Molecular & Chemical
WOS IDWOS:000399846700018
EI Accession Number20170703343863
EI KeywordsElectrons - Irradiation - Light - Temperature
EI Classification Number641.1 Thermodynamics - 741.1 Light/Optics
ADS Bibcode2017RaPC..135..121Y
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017RaPC..135..121Y
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017RaPC..135..121Y/citations
Citation statistics
Cited Times:1 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/284923
Collection多学科研究中心
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Yang J,Zhang P,Cao XZ,et al. Positron irradiation effect on positronium formation in gamma-irradiated LDPE and unplasticized PVC[J]. RADIATION PHYSICS AND CHEMISTRY,2017,135:121-126.
APA 杨静.,张鹏.,曹兴忠.,于润升.,王宝义.,...&Wang, BY.(2017).Positron irradiation effect on positronium formation in gamma-irradiated LDPE and unplasticized PVC.RADIATION PHYSICS AND CHEMISTRY,135,121-126.
MLA 杨静,et al."Positron irradiation effect on positronium formation in gamma-irradiated LDPE and unplasticized PVC".RADIATION PHYSICS AND CHEMISTRY 135(2017):121-126.
Files in This Item:
File Name/Size DocType Version Access License
20170099.pdf(783KB)期刊论文出版稿限制开放CC BY-NC-SAApplication Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[杨静]'s Articles
[张鹏]'s Articles
[曹兴忠]'s Articles
Baidu academic
Similar articles in Baidu academic
[杨静]'s Articles
[张鹏]'s Articles
[曹兴忠]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[杨静]'s Articles
[张鹏]'s Articles
[曹兴忠]'s Articles
Terms of Use
No data!
Social Bookmark/Share
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.