DETECTION OF PARAMAGNETIC CENTERS ON AMORPHOUS-SIO2 GRAIN SURFACES USING POSITRONIUM

	DETECTION OF PARAMAGNETIC CENTERS ON AMORPHOUS-SIO2 GRAIN SURFACES USING POSITRONIUM
	SAITO, H; NAGASHIMA, Y; HYODO, T; Zhang TB(张天保); CHANG, TB
刊名	PHYSICAL REVIEW B
	1995
卷号	52 期号:2 页码:R689-R692
通讯作者	ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING,PEOPLES R CHINA
英文摘要	Angular correlation of positron-annihilation radiation, positron-lifetime spectra, and Doppler-broadening spectra of the annihilation radiation from silica aerogel have been measured in the temperature range between 13 and 295 K. Spin conversion of positronium at the surfaces of the amorphous-SiO2 grains is observed when the aerogel is irradiated sufficiently by the positrons at low temperatures. This shows that paramagnetic centers are induced on the first layer of the surface of the amorphous-SiO2 grains by the irradiation. The surface paramagnetic centers are unstable above 150 K and are attributed to a nonbridging oxygen hole center (Si-O-.).
学科主题	Physics
类目[WOS]	Physics, Condensed Matter
研究领域[WOS]	Physics
原文出处	SCI
语种	英语
WOS记录号	WOS:A1995RJ71100003
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/240327]
专题	高能物理研究所_多学科研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	SAITO, H,NAGASHIMA, Y,HYODO, T,et al. DETECTION OF PARAMAGNETIC CENTERS ON AMORPHOUS-SIO2 GRAIN SURFACES USING POSITRONIUM[J]. PHYSICAL REVIEW B,1995,52(2):R689-R692.
APA	SAITO, H,NAGASHIMA, Y,HYODO, T,张天保,&CHANG, TB.(1995).DETECTION OF PARAMAGNETIC CENTERS ON AMORPHOUS-SIO2 GRAIN SURFACES USING POSITRONIUM.PHYSICAL REVIEW B,52(2),R689-R692.
MLA	SAITO, H,et al."DETECTION OF PARAMAGNETIC CENTERS ON AMORPHOUS-SIO2 GRAIN SURFACES USING POSITRONIUM".PHYSICAL REVIEW B 52.2(1995):R689-R692.