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Measurement of photon dose rates in moderated neutron calibration fields

減速中性子校正場における光子線量率の測定

吉田 忠義 ; 辻村 憲雄  ; 宮田 英明*

Yoshida, Tadayoshi; Tsujimura, Norio; Miyata, Hideaki*

減速材で覆われた$$^{252}$$Cf中性子線源を用いた減速中性子校正場に混在する光子線量率の割合を決定するための研究を行った。光子線量率の測定は、異なる検出原理を持つ3種類の測定器によって行われた。また、測定結果は、モンテカルロ計算に基づく計算結果と比較された。各測定器によって観測された混在光子線量率は、よく一致した。また、測定及び計算結果についてもよく一致した。

The authors performed the complementary work which determined the proportion of the contaminating photons present in the moderated neutron field using a $$^{252}$$Cf neutron source surrounded with the moderators. The measurements of the photon dose rates were performed by three instruments with different detection principles and the results were compared with the Monte Carlo calculation results. The contaminant photon dose rates observed from each instrument were in good agreement, and the measurement and calculation results also agreed well.

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