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Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique
Wang, DN; Zhang, LZ; Wang, BY; Yu, RS; Zhang, ZM; Li, DW; Wei, L; Wang DN(王丹妮); Zhang LZ(张兰芝); Wang BY(王宝义); Yu RS(于润升); Zhang ZM(章志明); Li DW(李道武); Wei L(魏龙)
2009
Source PublicationCHINESE PHYSICS C
Volume33Issue:1Pages:#REF!
Corresponding AuthorWang, DN (reprint author), CAS, Inst High Energy Phys, Key Lab Nucl Anal Tech, Beijing 100049, Peoples R China.
SubtypeArticle
AbstractA high-performance positron age-momentum correlation (AMOC) spectrometer was newly developed. The counting rate is increased up to 200 cps much larger than the value 20 cps reported by other international groups. And at the same tune, the time resolution still keeps at the international level of 220 ps. Furthermore, positronium (Ps) annihilation in silica aerogel was investigated by AMOC, which indicates: (1) Ps annihilation between the grains dominantly undergoes pick-off process and spin conversion from o-Ps to p-Ps; (2) Annealing below 400 degrees C changes the grain surface conditions, i. e. the desorption of hydrogen and the decrease of the defect centers concentration.
Keywordpositron age-momentum correlation positronium formation positron states silica aerogel
Subject AreaPhysics
Indexed BySCI
WOS SubjectPhysics, Nuclear ; Physics, Particles & Fields
WOS IDWOS:000262408400017
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/226011
Collection多学科研究中心
核技术应用研究中心
Recommended Citation
GB/T 7714
Wang, DN,Zhang, LZ,Wang, BY,et al. Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique[J]. CHINESE PHYSICS C,2009,33(1):#REF!.
APA Wang, DN.,Zhang, LZ.,Wang, BY.,Yu, RS.,Zhang, ZM.,...&魏龙.(2009).Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique.CHINESE PHYSICS C,33(1),#REF!.
MLA Wang, DN,et al."Positronium annihilation in silica aerogel studied by a positron age-momentum correlation technique".CHINESE PHYSICS C 33.1(2009):#REF!.
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