The Analysis of 3γ/2γ in the Measurement of Positron Annihilation Doppler-broadening Spectroscopy

  • Doppler-broadening slow positron annihilation spectroscopy is used to measure the concentration, spatial distribution, and size of open-volume defects in surface and interface of material. In this method, the quantitative evaluation is generally carried out with the line shape parameter S and W, but sometimes the parameters provide some finite information. For example, if positron and electron form positronium (include o-Ps and p-Ps) in material, the parameters S and W may provide little information about positronium even complicate the analyses. A parameter I, defined as o-Ps self-decay intensity, was used to analyze Ag layer capped and non-capped silica aerogel by slow positron annihilation Doppler -broadening spectroscopy. The result shows that I can provide more information for researching mesoporous material and nanometer film.
  • 加载中
  • [1] . Canter K F, Jr Mills A P, Berko S. Phys. Rev. Lett., 1974,33: 7-102. Jr Mills A P. Phys. Rev. Lett., 1978, 41: 1828-18313. Lynn K G. Phys. Rev. Lett., 1979, 43:391-3944. Heitler W. The Quantum Theory of Radiation(3rd ed).New York: Oxford University Press, 19545. ZHANG Tian-Bao et al.HEP NP, 1990,14(4):289-295.(in Chinese)(张天宝等.高能物理与核物理,1990,14(4):289-295)6. CHANG Tian-Bao,T ANG Xiao-Wei,LI Yao-Qing. Phys.Lett.,1985, B157(5-6):357-3607. Debertin K. Nucl. Instrum.Methods,1979,165:279-2818. Vaninbroukx R, Denecke B. Nucl. Instrum. Methods,1982,193(1-2):191-196
  • 加载中

Get Citation
ZHOU Chun-Lan, ZHANG Tian-Bao, MA Chuang-Xing, ZHANG Zhi-Ming, CAO Xing-Zhong, WANG Bao-Yi and WEI Long. The Analysis of 3γ/2γ in the Measurement of Positron Annihilation Doppler-broadening Spectroscopy[J]. Chinese Physics C, 2006, 30(1): 84-87.
ZHOU Chun-Lan, ZHANG Tian-Bao, MA Chuang-Xing, ZHANG Zhi-Ming, CAO Xing-Zhong, WANG Bao-Yi and WEI Long. The Analysis of 3γ/2γ in the Measurement of Positron Annihilation Doppler-broadening Spectroscopy[J]. Chinese Physics C, 2006, 30(1): 84-87. shu
Milestone
Received: 2005-04-11
Revised: 1900-01-01
Article Metric

Article Views(2431)
PDF Downloads(676)
Cited by(0)
Policy on re-use
To reuse of subscription content published by CPC, the users need to request permission from CPC, unless the content was published under an Open Access license which automatically permits that type of reuse.
通讯作者: 陈斌, bchen63@163.com
  • 1. 

    沈阳化工大学材料科学与工程学院 沈阳 110142

  1. 本站搜索
  2. 百度学术搜索
  3. 万方数据库搜索
  4. CNKI搜索

Email This Article

Title:
Email:

The Analysis of 3γ/2γ in the Measurement of Positron Annihilation Doppler-broadening Spectroscopy

    Corresponding author: ZHOU Chun-Lan,
  • Laboratory of Nuclear Analytical Technology,Institute of High Energy Physics,CAS,Beijing 100049,China

Abstract: Doppler-broadening slow positron annihilation spectroscopy is used to measure the concentration, spatial distribution, and size of open-volume defects in surface and interface of material. In this method, the quantitative evaluation is generally carried out with the line shape parameter S and W, but sometimes the parameters provide some finite information. For example, if positron and electron form positronium (include o-Ps and p-Ps) in material, the parameters S and W may provide little information about positronium even complicate the analyses. A parameter I, defined as o-Ps self-decay intensity, was used to analyze Ag layer capped and non-capped silica aerogel by slow positron annihilation Doppler -broadening spectroscopy. The result shows that I can provide more information for researching mesoporous material and nanometer film.

    HTML

Reference (1)

目录

/

DownLoad:  Full-Size Img  PowerPoint
Return
Return