Physical design of positronium time of flight spectroscopy apparatus

JIANG Xiao-Pan; ZHANG Zi-Liang; QIN Xiu-Bo; YU Run-Sheng; WANG Bao-Yi

Chinese Physics C> 2010, Vol. 34> Issue(12) : 1890-1894

Physical design of positronium time of flight spectroscopy apparatus

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Abstract：
Positronium time of flight spectroscopy (Ps-TOF) is an effective technique for porous material research. It has advantages over other techniques for analyzing the porosity and pore tortuosity of materials. This paper describes a design for Ps-TOF apparatus based on the Beijing intense slow positron beam, supplying a new material characterization technique. In order to improve the time resolution and increase the count rate of the apparatus, the detector system is optimized. For 3 eV o-Ps, the time broadening is 7.66 ns and the count rate is 3 cps after correction.

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JIANG Xiao-Pan, ZHANG Zi-Liang, QIN Xiu-Bo, YU Run-Sheng and WANG Bao-Yi. Physical design of positronium time of flight spectroscopy apparatus[J]. Chinese Physics C, 2010, 34(12): 1890-1894.

JIANG Xiao-Pan, ZHANG Zi-Liang, QIN Xiu-Bo, YU Run-Sheng and WANG Bao-Yi. Physical design of positronium time of flight spectroscopy apparatus[J]. Chinese Physics C, 2010, 34(12): 1890-1894. shu

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Received: 2009-12-28
Revised: 2010-01-24

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Physical design of positronium time of flight spectroscopy apparatus

Corresponding author: WANG Bao-Yi,

Received Date: 2009-12-28

Accepted Date: 2010-01-24

Available Online: 2010-12-05

Abstract:

Positronium time of flight spectroscopy (Ps-TOF) is an effective technique for porous material research. It has advantages over other techniques for analyzing the porosity and pore tortuosity of materials. This paper describes a design for Ps-TOF apparatus based on the Beijing intense slow positron beam, supplying a new material characterization technique. In order to improve the time resolution and increase the count rate of the apparatus, the detector system is optimized. For 3 eV o-Ps, the time broadening is 7.66 ns and the count rate is 3 cps after correction.

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Physical design of positronium time of flight spectroscopy apparatus

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