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治療用重粒子線のブラッグピーク付近のOHラジカル収量,2; HIBRACコードによるフラグメンテーションの寄与の検討

Yield of OH near the Bragg peak of heavy-ion beam from HIMAC, 2; Contribution of fragmentation evaluated with HIBRAC code

前山 拓哉*; 山下 真一; Baldacchino, G.*; 勝村 庸介; 室屋 裕佐*; 田口 光正; 木村 敦; 村上 健*

Maeyama, Takuya*; Yamashita, Shinichi; Baldacchino, G.*; Katsumura, Yosuke; Muroya, Yusa*; Taguchi, Mitsumasa; Kimura, Atsushi; Murakami, Takeshi*

これまでガン治療用高エネルギー重粒子線のブラッグピーク近傍におけるOH収量を測定してきた。本研究では高エネルギー重粒子線で顕著となるフラグメンテーション(核破砕)をシミュレーションにより評価し、これを元に測定結果を再現し、計算コードの検証を行うとともに各イオンの寄与がOH収量の点でどの程度あるのかについて検討した。

OH yield near the Bragg peak of high-energy heavy ions, of which energies are comparable to those used in cancer therapy, has been determined in the previous work. Because fragmentations of primary projectile are significant in the energy region, it was purposed to calculate the fragmentations with an existing code and to reproduce the already obtained experimental results for verification of the code as well as for estimation of how much each fragmentated ions contributes in terms of OH yield.

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