Theoretical investigations of electron emission after water vapour ionization by light ion impact

Champion, C.; Cappello, C. Dal

doi:10.1016/j.nimb.2009.02.040

Cited by 10 publications

(10 citation statements)

References 23 publications

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“…On the theoretical side, semiempirical methods have been used to evaluate the total and differential cross sections for single ionization of the H 2 O molecule [16,17]. Also, treatments based on the first Born [9,[18][19][20] and the continuum distorted-wave-eikonal initial state (CDW-EIS) [21][22][23] approximations have been applied to describe primary processes that happen in the collision of water with heavy ions. In all these treatments, within the framework of the independent electron picture, mostly single electron transitions are considered.…”

Section: Introductionmentioning

confidence: 99%

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

et al. 2016

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Single and multiple electron removal processes (capture and ionization) in proton-H 2 O collisions have been investigated applying the continuum distorted wave with eikonal initial-state model within the framework of independent electron approach. Probabilities and cross sections for electron capture are derived from the same quantities evaluated for ionization using the continuity of transition quantities across the ionization threshold. Dissociation and fragmentation cross sections for the H 2 O q+ (q = 1-3) ions have been evaluated by considering branching ratios that include the effect of multiple electron removal transitions. The results are compared with experimental and other theoretical data in the range of impact energies from 30 kev to 5 MeV. Generally, the evaluated cross sections and fragmentation yields show good agreement with experiments at impact energies above 100-150 keV.

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Section: Introductionmentioning

confidence: 99%

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

et al. 2016

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“…Theoretical investigations have also been performed extensively for nucleic-acid-base molecules [12][13][14][15][16] and water [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Absolute doubly differential cross sections for ionization of adenine by 1.0-MeV protons

et al. 2011

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Double-differential ionization cross sections of adenine (C 5 H 5 N 5 ) by 1.0-MeV protons have been measured using a vapor-phase adenine target. Ejected electrons were analyzed by a 45 • parallel-plate electrostatic spectrometer in an electron energy range from 1 to 1000 eV at electron emission angles from 15 • to 165 • . The effective target thickness of adenine was determined by a Rutherford forward scattering method and a vapor deposition method. Present data are in good agreement with recent calculations. Comparisons were made with other data on various hydrocarbon molecules. It was found that the ionization cross sections of these molecules can be scaled fairly well in terms of the total number of valence electrons.

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“…The HKS-computed data obtained with SCENA are denoted with lines. The experimental data references are: 1 MeV proton in argon from Rudd et al [27], 72 MeV bare carbon ion in water vapor from Champion [40], 48 MeV oxygen ion in water vapor from Bhattacharjee et al [44], and ssion fragments in helium from Dyachenko [41]. For that combination, an average-like ssion fragment is used.…”

Section: Discussionmentioning

confidence: 99%

SCENA: A simulation tool for radiation-induced gas scintillation

Lamotte

Izarra

Jammes

2020

Nuclear Instruments and Methods in Physics Research Section A:

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Within the framework of the dependable neutron ux instrumentation development for Sodium-cooled Fast Reactor (SFR) of Generation IV, the French Alternative Energies and Atomic Energy Commission (CEA) is investigating an innovative technology based on optical signals produced within an ionization chamber. In such gaseous detectors, neutrons interact with a ssile material, releasing heavy ions in the MeV-range, eventually leading to spontaneous photon emission in the ultraviolet to infrared range. In this paper, the process of light generation is analyzed through a newly-developed computer code named SCENA. Semi-empirical models for ion-to-gas energy exchange and secondary electron production are assessed. The output of the SCENA subroutines are satisfactory checked against other electron swarm simulation tools, experimental data and a theoretical gas model. SCENA is able to follow the cold-plasma created along a heavy ion slowing-down in space and time evolution. This performance is a key point in the development of optical ionization chambers.

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Theoretical investigations of electron emission after water vapour ionization by light ion impact

Cited by 10 publications

References 23 publications

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

Single and multiple electron removal and fragmentation in collisions of protons with water molecules

Absolute doubly differential cross sections for ionization of adenine by 1.0-MeV protons

SCENA: A simulation tool for radiation-induced gas scintillation

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