MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY

ZHANG Tian-Bao; TANG Xiao-Wei; WANG Yun-Yu; LI Yao-Qing; YIU Ke; WANG Shao-Jie

Chinese Physics C> 1984, Vol. 8> Issue(4) : 385-391

MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY

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Abstract：
Using a very light silica aerogel sample as the o-Ps source to reduce the scattered γ rays and a high purity Ge (HPGe) γ energy spectrometer with a precise timing channel for event selection, the continuous γ ray energy spectrum from o-Ps 3γ decay has been measured in the whole spectrum range. The result is in a good agreement with the result of Ore-Powell theoretical calculation.

References

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A. Ore and J, Powell, Phys. Rev.,75(1949), 1696.[2] A. Akhiezer and V. Berestetskii,Quantum Electrodynamics,(Interscience Publishers, 1965).[3] G. M. Lewis and T. G. Ferguson, Phil. Mag.; 44(1953 ) , 1011.[4] S. Debennedetti and R. Siegel, Phys. Rev.,94(1954), 955.[5] 张天保、王少阶、李耀清、唐孝威, 物理学报, 32,(1983), 635a[6] S. J. Brodsky and S. D. Drell, Annual Rev. Nucl. Sci., 20(1970),147.[7] P. Soding and G. Wolf, Annual Rev. Nucl. Part. Sci., 31(1981), 231[8] 张天保、王蕴玉、张长春、王少阶, 高能物理与核物理, No. 1,(1983), 1.[9] C. Broquet, G. Robin and M. Vacher, ORNL-11c-10, (1967).[10] K. Debertin, Nucl. Instr. Methods, 158(1979 ),479.[11] R. Vaninbroukx and B. Denecke, Nucl. Instr. Methods, 193(1982), 191.[12] R. J. Gehrke, R. G. Helmer and R. C. Greenwood, Nucl. Instr. Methods, 147(1977), 405.[13] 李耀清, 硕士论文, (1982), 未发表, [14] G. Adkins, Annals o f Physics, 146(1983),78.

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ZHANG Tian-Bao, TANG Xiao-Wei, WANG Yun-Yu, LI Yao-Qing, YIU Ke and WANG Shao-Jie. MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY[J]. Chinese Physics C, 1984, 8(4): 385-391.

ZHANG Tian-Bao, TANG Xiao-Wei, WANG Yun-Yu, LI Yao-Qing, YIU Ke and WANG Shao-Jie. MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY[J]. Chinese Physics C, 1984, 8(4): 385-391. shu

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

MEASUREMENT OF THE WHOLE GAMMA-RAY ENERGY SPECTRUM IN o-Ps 3 GAMMA-DECAY

Corresponding author: ZHANG Tian-Bao,

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1984-06-05

Abstract: Using a very light silica aerogel sample as the o-Ps source to reduce the scattered γ rays and a high purity Ge (HPGe) γ energy spectrometer with a precise timing channel for event selection, the continuous γ ray energy spectrum from o-Ps 3γ decay has been measured in the whole spectrum range. The result is in a good agreement with the result of Ore-Powell theoretical calculation.