Double differential distribution of electron emission in the ionization of water molecules by fast bare oxygen ions

被引：29

作者：

Bhattacharjee, Shamik ^{[1
]}

Biswas, Shubhadeep ^{[1
]}

Bagdia, Chandan ^{[1
]}

Roychowdhury, Madhusree ^{[1
]}

Nandi, Saikat ^{[1
]}

Misra, Deepankar ^{[1
]}

Monti, J. M. ^{[2
,3
]}

Tachino, C. A. ^{[2
,3
]}

Rivarola, R. D. ^{[2
,3
]}

Champion, C. ^{[4
]}

Tribedi, Lokesh C. ^{[1
]}

机构：

[1] Tata Inst Fundamental Res, Homi Bhabha Rd, Bombay 400005, Maharashtra, India

[2] Fac Ciencias Exactas Ingn & Agrimensura, Lab Colisiones Atom, Ave Pellegrini 250, RA-2000 Rosario, Santa Fe, Argentina

[3] Inst Fiis Rosario CONICET UNR, Ave Pellegrini 250, RA-2000 Rosario, Santa Fe, Argentina

[4] Univ Bordeaux 1, CENBG, CNRS, IN2P3, Chemin Solarium,BP120, F-33175 Gradignan, France

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2016年 / 49卷 / 06期

关键词：

ion collision with molecules; water molecule; e-spectroscopy; experiment; radiation damage; CDW-EIS model; low-energy electron DDCS spectrum; CROSS-SECTIONS; ANGULAR-DISTRIBUTION; ATOM COLLISIONS; ENERGY-DEPENDENCE; IMPACT IONIZATION; PROTON IMPACT; CARBON-IONS; VAPOR; HE; APPROXIMATION;

D O I：

10.1088/0953-4075/49/6/065202

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The doubly differential distributions of low-energy electron emission in the ionization of water molecules under the impact of fast bare oxygen ions with energy of 48 MeV are measured. The measured data are compared with two quantum-mechanical models, i.e. the post and prior versions of the continuum distorted wave-eikonal initial state (CDW-EIS) approximation, and the first-order Born approximation with initial and final wavefunctions verifying correct boundary conditions (CB1). An overall excellent qualitative agreement is found between the data and the CDW-EIS models whereas the CB1 model showed substantial deviation. However, the detailed angular distributions display some discrepancies with both CDW-EIS models. The single differential and total cross-sections exhibit good agreement with the CDW-EIS models. The present detailed data set could also be used as an input for modeling highly charged ion induced radiation damage in living tissues, whose most abundant component is water. Similar measurements are also carried out for a projectile energy of 60 MeV. However, since the double differential cross-section data show similar results the details are not provided here, except for the total ionization cross-sections results.

引用

页数：9

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