Energy deposition model based on electron scattering cross section data from water molecules

Muñoz, Antonio; Oiler, J.C.; Blanco, F.; Gorfinkiel, Jimena D.; Limão-Vieira, P.; Maira-Vidal, A.; Borge, María José García; Tengblad, O.; Huerga, C.; Téllez, M.; García, Gustavo

doi:10.1088/1742-6596/133/1/012002

Cited by 14 publications

(12 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The IAM-SCAR+I method for the calculation of positron scattering cross sections has been improved in 2016, as outlined in our paper from Blanco et al [8]. This method builds on our previous work [4,11,12,14,15,[20][21][22][23][24] for both electrons and positrons, and has been used successfully in the past for biologically relevant molecules such as water [8,25], pyrimidine [26][27][28], pyridine [29], benzene [30], diatomic oxygen [24,31], tetrahydrofuran [32], macromolecules [21] and many more, typically in the range of 0.1 to 10000 eV incident energy.…”

Section: Calculation Procedures 21 Optical Potential Methodsmentioning

confidence: 99%

Positron interactions with nitrogen and oxygen molecules: elastic, inelastic and total cross sections

2019

View full text Add to dashboard Cite

Positron scattering cross sections, used for modelling particle transport in various media, are difficult to gather experimentally. As such, various cross section calculation methods have been developed to varying accuracy. The IAM-SCAR+I method has been improved upon recently to fulfil the optical theorem and the results for two important simple molecules, N2 and O2, are presented here. These results are compared to literature and our findings are comparable in most impact energy ranges.

show abstract

Section: Calculation Procedures 21 Optical Potential Methodsmentioning

confidence: 99%

Positron interactions with nitrogen and oxygen molecules: elastic, inelastic and total cross sections

2019

View full text Add to dashboard Cite

show abstract

“…An updated review has recommended the corrected data of Khakoo et al ([43] and erratum) for low energy scattering and Munoz et al [44] for higher energies (where experiment and theoretical evaluations merge). The benchmarking swarm paper by de Urquijo et al [45] on cross sections for water reproduced measured transport data in water/helium mixtures and presented the integral cross sections that are entirely self-consistent with the available total cross sections as well as the swarm data over a large range of reduced electric field, E/N.…”

Section: Elastic Electron Scattering and Cross Sectionsmentioning

confidence: 99%

Rosetta Mission: Electron Scattering Cross Sections—Data Needs and Coverage in BEAMDB Database

Marinković

Bredehöft

Vujčić

et al. 2017

Atoms

View full text Add to dashboard Cite

Abstract:The emission of [O I] lines in the coma of Comet 67P/Churyumov-Gerasimenko during the Rosetta mission have been explained by electron impact dissociation of water rather than the process of photodissociation. This is the direct evidence for the role of electron induced processing has been seen on such a body. Analysis of other emission features is handicapped by a lack of detailed knowledge of electron impact cross sections which highlights the need for a broad range of electron scattering data from the molecular systems detected on the comet. In this paper, we present an overview of the needs for electron scattering data relevant for the understanding of observations in coma, the tenuous atmosphere and on the surface of 67P/Churyumov-Gerasimenko during the Rosetta mission. The relevant observations for elucidating the role of electrons come from optical spectra, particle analysis using the ion and electron sensors and mass spectrometry measurements. To model these processes electron impact data should be collated and reviewed in an electron scattering database and an example is given in the BEAMD, which is a part of a larger consortium of Virtual Atomic and Molecular Data Centre-VAMDC.

show abstract

“…Electron energy loss distributions in H 2 O were measured by us in a transmission beam set-up in order to assign the energy released in each electron-molecule interaction. After observing that the energy loss distributions did not present significant variations (uncertainty ≤ 15%) for incident electron energies in the range 50-5 000 eV, a unique (average) electron energy loss spectrum was used (Mu ñoz et al, 2008a). The mean excitation energy in water yielded by this distribution is ≤ 34 eV for electron energies ≤ 500eV and rises to about 40 eV for energies beyond the threshold for inner shell excitation/ionization.…”

Section: Electron Energy Loss Distributionsmentioning

confidence: 99%

“…Other probable decay energies are 2.407 MeV, 3.029 MeV and 1.979 MeV (β) and 511.86 keV, 621.93 keV and 1.050 MeV (γ) (data from the Lund Nuclear Data Service: Chu et al (1999)). The combined electron emission spectrum of the applicator for use in the simulation was determined experimentally (Mu ñoz et al, 2008a) with a silicon detector and is shown in fig. 3.…”

Section: Ocular Brachytherapy With 106 Rumentioning

confidence: 99%

Biomedical Engineering, Trends in Electronics, Communications and Software

Laskovski¹

2011

View full text Add to dashboard Cite

Statements and opinions expressed in the chapters are these of the individual contributors and not necessarily those of the editors or publisher. No responsibility is accepted for the accuracy of information contained in the published articles. The publisher assumes no responsibility for any damage or injury to persons or property arising out of the use of any materials, instructions, methods or ideas contained in the book.

show abstract

Energy deposition model based on electron scattering cross section data from water molecules

Cited by 14 publications

References 64 publications

Positron interactions with nitrogen and oxygen molecules: elastic, inelastic and total cross sections

Positron interactions with nitrogen and oxygen molecules: elastic, inelastic and total cross sections

Rosetta Mission: Electron Scattering Cross Sections—Data Needs and Coverage in BEAMDB Database

Biomedical Engineering, Trends in Electronics, Communications and Software

Contact Info

Product

Resources

About