Low-Energy Electron Penetration Range in Liquid Water

Meesungnoen, Jintana; Jay‐Gerin, Jean‐Paul; Filali-Mouhim, Abdelali; Mankhetkorn, Samlee

doi:10.1667/0033-7587(2002)158[0657:leepri]2.0.co;2

Cited by 200 publications

(170 citation statements)

References 23 publications

Supporting

Mentioning

154

Contrasting

Order By: Relevance

“…In the first approach, we followed the electrons step-by-step down to 25 meV using the processes mentioned above. In the second approach, we used the penetration for low energy electrons computed by Meesungnoen et al: 21) when the electron reaches a kinetic energy inferior to the lowest excitation level (8.22 eV), it is displaced in one unique and final step whose mean value corresponds to a fit of the penetration curve given in 21) and with an isotropic direction. In the two approaches described above, electron elastic scattering was computed using either the Champion model or the Screened Rutherford model.…”

Section: )mentioning

confidence: 99%

Modeling Radiation Chemistry in the Geant4 Toolkit

Karamitros

Mantero

Incerti

et al. 2011

Progress in Nuclear Science and Technology

101

View full text Add to dashboard Cite

Simulation of biological effects of ionizing radiation at the DNA scale requires not only the modeling of direct damages induced on DNA by the incident radiation and by secondary particles but also the modeling of indirect effects of radiolytic products resulting from liquid water radiolysis. They can provoke single, double strand breaks and base damage by reacting with DNA. The Geant4 Monte Carlo toolkit is currently being extended for the simulation of biological damages of ionizing radiation at the DNA scale in the framework of the "Geant4-DNA" project. Physics models for the modeling of direct effects are already available in Geant4. In the present paper, an approach for the modeling of radiation chemistry in pure liquid water within Geant4 is presented. In particular, this modeling includes Brownian motion and chemical reactions between molecules following water radiolysis. First results on time-dependent radiochemical yields from 1 picosecond up to 1 microsecond after irradiation are compared to published data and discussed.

show abstract

Section: )mentioning

confidence: 99%

Modeling Radiation Chemistry in the Geant4 Toolkit

Karamitros

Mantero

Incerti

et al. 2011

Progress in Nuclear Science and Technology

101

View full text Add to dashboard Cite

show abstract

“…Some secondary electrons may have energies in the MeV region depending on the initial radiation type and energy. These electrons can travel several millimeters in biological media (Meesungnoen et al, 2002) and affect cells far away from the trajectory of the radiation track. Electrons interact with matter by ionizations, excitations, elastic collisions and dissociative attachment.…”

Section: Electronsmentioning

confidence: 99%

“…The range of electrons of energies up to 150 keV in liquid water has been calculated by Meesungnoen et al (2002) and up to 100 keV by . Figure 20 displays the computed values of the electron penetration as a function of initial electron energy from 0.1 eV to 10 MeV calculated with RITRACKS by using the relativistic and the non-relativistic cross sections.…”

Section: Electrons 511 Electron Rangementioning

confidence: 99%

Monte-Carlo Simulation of Ionizing Radiation Tracks

Plante¹,

Cucinotta²

2011

Applications of Monte Carlo Methods in Biology, Medicine and Other Fields of Science

View full text Add to dashboard Cite

“…The distance that an electron travels in the conduction band before the solvent traps it depends on how efficiently inelastic scattering dissipates the excess kinetic energy 52,53 and is different for H 2 O and D 2 O. [54][55][56] Even for direct ionization, which is the only mechanism where nuclear motion does not play a primary role in the ionization process, different inelastic scattering efficiencies are likely to give an isotope dependence of the ejection length.…”

Section: Isotope Dependence Of the Ejection Lengthmentioning

confidence: 99%

Excitation-energy dependence of the mechanism for two-photon ionization of liquid H2O and D2O from 8.3to12.4eV

Elles

Jailaubekov

Crowell

et al. 2006

The Journal of Chemical Physics

119

192

View full text Add to dashboard Cite

Transient absorption measurements monitor the geminate recombination kinetics of solvated electrons following two-photon ionization of liquid water at several excitation energies in the range from 8.3 to 12.4 eV. Modeling the kinetics of the electron reveals its average ejection length from the hydronium ion and hydroxyl radical counterparts and thus provides insight into the ionization mechanism. The electron ejection length increases monotonically from roughly 0.9 nm at 8.3 eV to nearly 4 nm at 12.4 eV, with the increase taking place most rapidly above 9.5 eV. We connect our results with recent advances in the understanding of the electronic structure of liquid water and discuss the nature of the ionization mechanism as a function of excitation energy. The isotope dependence of the electron ejection length provides additional information about the ionization mechanism. The electron ejection length has a similar energy dependence for two-photon ionization of liquid D 2 O, but is consistently shorter than in H 2 O by about 0.3 nm across the wide range of excitation energies studied.

show abstract

Low-Energy Electron Penetration Range in Liquid Water

Cited by 200 publications

References 23 publications

Modeling Radiation Chemistry in the Geant4 Toolkit

Modeling Radiation Chemistry in the Geant4 Toolkit

Monte-Carlo Simulation of Ionizing Radiation Tracks

Excitation-energy dependence of the mechanism for two-photon ionization of liquid H2O and D2O from 8.3to12.4eV

Contact Info

Product

Resources

About