Contribution of cadmium to the total amount of positron creation in a reactor-based slow positron beamline

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:463

Article

Yabuuchi, A.¹  Yoshiie, T.¹  Kinomura, A.¹ 

[1] Kyoto Univ, Inst Integrated Radiat & Nucl Sci, Kumatori, Osaka 5900494, Japan

关键词: Reactor-based slow positron beamline;    Cadmium;    Prompt gamma-ray;    Pair creation;    Monte Carlo simulation;   

DOI  :  10.1016/j.nimb.2019.11.028

来源: Elsevier

【 摘 要 】

In the slow positron beamline at the Kyoto University Research Reactor (KUR), positron creation was enhanced by increasing the gamma-ray intensity at the positron source via the reaction of Cd-113(n,gamma)Cd-114. To achieve this, a cadmium (Cd) cap was attached to the positron source, surrounding it, and thus, without intentional cooling, the temperature was able to reach near the melting point of Cd via nuclear heating. In this study, the degree to which the Cd cap contributes to the quantity of positron creation was estimated by using the Monte Carlo calculation code PHITS (Particle and Heavy Ion Transport code System), which simulates radiation transportation and interaction with matter. As a result, the number of positrons created was found to become 2.0 +/- 0.1 times higher by using the Cd cap at the KUR slow positron beamline. The use of the Cd cap was confirmed to be significantly effective for enhancing positron creation.

【 授权许可】

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