linear energy transfer

Japanese: linear energy transfer（英語表記）linearenergytransfer

…It is an abbreviation for linear energy transfer and is sometimes translated as linear energy transfer loss. When charged particle radiation enters a material, the energy of the radiation is lost through collisions between the incident charged particles and the electrons and atomic nuclei in the material. …

From [Radiation Biological Effects]

… The biological effects of radiation are affected by the type of radiation (radiation quality), how it is administered (exposure conditions), internal factors specific to cells and tissues, and various external factors (such as the presence or absence of oxygen). When radiation passes through a living body, positive and negative ion pairs are created along its track, but the spatial distribution of the ion pairs, that is, the way in which radiation energy is transferred per unit track captured at a microscopic level - this is called linear energy transfer (LET) - is very different between X-rays, gamma rays, and electron (β) rays, and fast neutrons and α rays. The latter are larger than the former when considered as particles, the ion pairs are denser, and the LET is larger. …

*Some terminology explanations that mention "linear energy transfer" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…linear energy transferの略で，線エネルギー付与損失と訳されることもある。荷電粒子放射線が物質中に入射すると，放射線の持つエネルギーは，入射荷電粒子と物質中の電子や原子核との衝突によって失われる。…

【放射線生物効果】より

…　放射線の生物効果は，放射線の種類(線質)，その与えられ方(照射条件)，細胞や組織に固有の内的要因，および種々の外的要因(たとえば酸素の有無)によって変更をうける。　放射線が生体を通り抜けるとき，その飛跡に沿って正負のイオン対がつくられるが，イオン対の空間的分布，つまりミクロでとらえた単位飛跡あたりの放射線エネルギーの与えられ方――これを線エネルギー付与，LET(linear energy transfer)という――はX線，γ線，電子(β)線と速中性子，α線などでは非常に異なる。後者は粒子(たま)としてみた場合前者よりも大きく，イオン対のでき方が密で，LETが大きい。…

※「linear energy transfer」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典第２版について | 情報

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