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The energy spectra and the quantum efficiencies of electrons emitted from the metallic elements irradiated by60Co gamma rays

 

作者: Masamoto Nakamura,  

 

期刊: Journal of Applied Physics  (AIP Available online 1983)
卷期: Volume 54, issue 6  

页码: 3141-3149

 

ISSN:0021-8979

 

年代: 1983

 

DOI:10.1063/1.332470

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The energy spectra, angular distributions, and the absolute quantum efficiencies of forward emission electrons from60Co &ggr;‐ray irradiated metallic elements have been measured using a double focusing &bgr;‐ray spectrometer. Samples measured were C, Al, Cu, Mo, Sn, W, and Pb. Their thicknesses were chosen about equal to the maximum range of a 1.33 Mev photoelectron so as to ensure electron equilibrium. Similar spectral shapes were observed for samples with similar atomic numbers, but energy spectrum for the large atomic number sample was different from the small atomic number one. Photoelectron peaks were observed in the spectra for W and Pb. An empirical equation which gives the quantum efficiency as the function of atomic number was obtained. The efficiencies computed from this equation were in good agreement with experimental results and numerical calculations.

 

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