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- W2006531609 abstract "Les phénomènes consécutifs à l'ionisation en couche K d'un atome de carbone peuvent provoquer des transformations importantes dans un hydrocarbure. On expose une méthode permettant de calculer le rendement en ionisations K au cours de l'irradiation d'un hydrocarbure par des électrons rapides ou par des rayons X ou γ, dont l'action se ramène essentiellement à celle de ces derniers. Le calcul numérique est effectué pour l'éjection d'électrons internes des atomes de carbone du polyéthylène lors de l'absorption totale d'électrons monocinétiques de 300 eV à 4 MeV. Le rendement obtenu, rapporté à l'énergie absorbée, croît avec l'énergie des électrons incidents et atteint, pour 4 MeV, 0,0305 ionisation K par 100 eV absorbés. On calcule de même les rendements en ionisations K lors de l'irradiation par des rayons X ou γ. Les résultats sont généralisés à un hydrocarbure quelconque, ainsi qu'à des dérivés organiques tels que les protéines. L'effet de l'ionisation de ces composés en couche LI est également examiné. The processes which follow K shell ionization of a carbon atom in a hydrocarbon molecule may lead to important changes. A method is described which allows computation of the yield of K ionizations during irradiation of a hydrocarbon by fast electrons or by X or γ-rays, the effects of which are essentially due to fast secondary electrons. The numerical calculations are carried out for the ejection of inner-shell electrons from carbon atoms in polyethylene through total absorption of monoenergetic electrons of 300 eV to 4 MeV. The absolute yield (with respect to absorbed energy) increases with incident electron energy and reaches at 4 MeV 0·0305 K ionizations per 100 eV absorbed. The yields of K ionizations are computed in the same way for X or γ-ray irradiation. The results are generalized to any hydrocarbon and to some organic derivatives such as proteins. The effect of LI ionization of these compounds is also considered." @default.
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- W2006531609 date "1975-04-01" @default.
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- W2006531609 title "Rendements absolus de l'ionisation en couche profonde sous l'action des rayonnements ionisants—II. Hydrocarbures et quelques substances d'intérêt biologique" @default.
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- W2006531609 doi "https://doi.org/10.1016/0020-7055(75)90055-8" @default.
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