Electron emission from water and neucleobases with radio-sensitizer

30th International Conference on Photonic, Electronic, and Atomic Collisions

Tribedi, Lokesh C.^1 ; Roy Chowdhury, M.^1 ; Bhattacharjee, S.^1 ; Bagdia, C.^1 ; Mandal, A.^1 ; Misra, D.^1 ; Champion, C.^2 ; Monti, J.^3 ; Rivarola, R.D.^3

Tata Institute of Fundamental Research, Colaba Mumbai

400005, India^1

Université Bordeaux 1, CNRS, IN2P3, CENBG, Chemin DuSolarium, BP120, Gradignan

33175, France^2

Institute de Fisica Rosario (CONICET-UNR), Universidad Nacional de Rosario, Rosario

2000, Argentina^3

关键词: Auger cascades;    Bragg peaks;    Double differential;    Emission cross section;    Model calculations;    Radiosensitizers;    Shape resonance;    Si ions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/875/11/102011/pdf
DOI  :  10.1088/1742-6596/875/11/102011

来源: IOP

【 摘 要 】

We report a comprehensive study of the double differential e-emission cross sections from water, adenine, uracil and bromouracil in collisions with fast highly charged C, O and Si ions ~MeV/u i.e. at the Bragg peak. A large enhancement in e-DDCS for bromouracil (a radiosensitizer) over adenine and uracil has been observed which can not be explained by electron statistics, rather in terms of collective shape resonance or Auger cascade in Br. Large set of TCS data provides a scaling law in terms of vpand qp, The agreement with the QM model calculations (CDW-EIS, CB1) for such large molecules is encouraging. We have also measured the K-ionization and K-K e-transfer TCS for adenine.