Differential elastic and total electron scattering cross sections of tetrahydrofuran

Baek, Woon Yong; Bug, Marion U.; Rabus, Hans; Gargioni, E.; Großwendt, B.

doi:10.1103/physreva.86.032702

Cited by 58 publications

(59 citation statements)

References 41 publications

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“…[24][25][26][27][28][29][33][34][35] Given that the level of accord between the various electron DCS is, in general, very good at each energy, for the sake of clarity we only show in Figure 5 the experimental results from Allan 26 and the theoretical results of Gauf et al 29 First, we observe in Figure 5 that the existing electron-impact elastic DCS are strongly forward peaked, similar to the present measured and computed positron-impact DCS. This suggests that the dipole interaction dominates over the static interaction in the scattering process at the lower energies.…”

Section: Elastic Differential Cross Sectionsmentioning

confidence: 74%

“…Specifically, we plot the electron R-matrix computations of Bouchiha et al 32 together with the electron measurements of Możejko et al, 23 as a comparison of those two data sets with the other existing experimental electron TCS results 22,24 has already been given in a recent paper. 24 In Figure 2, we see that the magnitude of all the various positron and electron-impact TCS can be quite different at the lower energies, although the TCS show very similar shapes, except for the results of Możejko et al 23 below ∼6 eV. Indeed, we note that the electron-impact TCS of Możejko et al 23 lie below the present positron-impact TCS at energies below ∼3 eV.…”

Section: A Total Cross Sectionsmentioning

confidence: 99%

“…In particular, we note the total cross section (TCS) measurements of Zecca et al, 22 Możejko et al, 23 and Baek et al 24 Elastic differential cross section (DCS) measurements at selected impact energies have been carried out by Milosavljević et al, 25 Allan, 26 Colyer et al, 27 Dampc et al, 28 Gauf et al, 29 and Baek et al 24 Except for the work of Milosavljević et al, 25 these groups also reported elastic integral cross sections (ICS). To the best of our knowledge, the only electron-impact, discrete electronic-state excitation cross sections are those of Do et al, 30 while a review of all the available earlier work and a recommended database for electron-THF scattering can be found in Fuss et al 31 Among the theoretical studies on electron-THF scattering, we note the TCS calculation using the R-matrix method of Bouchiha et al 32 Computations of the elastic DCS have been reported by Możejko and Sanche 33 with the independent atom model (IAM), Trevisan et al 34 using the complex Kohn variational method, and Winstead and McKoy 35 and Gauf et al 29 both employing the Schwinger multichannel method (SMC).…”

Section: Introductionmentioning

confidence: 99%

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Total, elastic, and inelastic cross sections for positron and electron collisions with tetrahydrofuran

Chiari

Anderson

Tattersall

et al. 2013

The Journal of Chemical Physics

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We present total, elastic, and inelastic cross sections for positron and electron scattering from tetrahydrofuran (THF) in the energy range between 1 and 5000 eV. Total cross sections (TCS), positronium formation cross sections, the summed inelastic integral cross sections (ICS) for electronic excitations and direct ionization, as well as elastic differential cross sections (DCS) at selected incident energies, have been measured for positron collisions with THF. The positron beam used to carry out these experiments had an energy resolution in the range 40-100 meV (full-width at half-maximum). We also present TCS results for positron and electron scattering from THF computed within the independent atom model using the screening corrected additivity rule approach. In addition, we calculated positron-impact elastic DCS and the sum over all inelastic ICS (except rotations and vibrations). While our integral and differential positron cross sections are the first of their kind, we compare our TCS with previous literature values for this species. We also provide a comparison between positron and electron-impact cross sections, in order to uncover any differences or similarities in the scattering dynamics with these two different projectiles.

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Section: Elastic Differential Cross Sectionsmentioning

confidence: 74%

Section: A Total Cross Sectionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Total, elastic, and inelastic cross sections for positron and electron collisions with tetrahydrofuran

Chiari

Anderson

Tattersall

et al. 2013

The Journal of Chemical Physics

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“…As the sum of all interaction cross sections, they represent the upper limit for partial scattering cross sections and can therefore be employed to check the consistency of compiled data sets. Total electron-scattering cross sections are also often used to put relative electronscattering cross sections on an absolute scale [2], and in Monte Carlo simulations they are required to determine the mean distance between two subsequent interaction points.…”

Section: Introductionmentioning

confidence: 99%

Total electron-scattering cross sections of pyrimidine

et al. 2013

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Total electron-scattering cross sections of pyrimidine, the basic component for the nucleic bases cytosine and thymine, were measured for electron energies from 5 eV to 1 keV using the linear transmission method. The measured results were compared to semiempirical data obtained by means of the additivity rule and to experimental data for benzene since it has a similar ring structure and the same number of valence electrons as pyrimidine. Furthermore, integral elastic and inelastic electron-scattering cross sections of pyrimidine were calculated by applying the spherical complex optical potential model. The sum of both cross sections agrees reasonably well with the experimental total electron-scattering cross sections of pyrimidine in the energy range from 20 eV to 1 keV. The experimental data are, however, significantly lower than the theoretical cross sections when including the contribution of rotational excitations to the electron scattering. Total electron-scattering cross sections of pyrimidine, the basic component for the nucleic bases cytosine and thymine, were measured for electron energies from 5 eV to 1 keV using the linear transmission method. The measured results were compared to semiempirical data obtained by means of the additivity rule and to experimental data for benzene since it has a similar ring structure and the same number of valence electrons as pyrimidine. Furthermore, integral elastic and inelastic electron-scattering cross sections of pyrimidine were calculated by applying the spherical complex optical potential model. The sum of both cross sections agrees reasonably well with the experimental total electron-scattering cross sections of pyrimidine in the energy range from 20 eV to 1 keV. The experimental data are, however, significantly lower than the theoretical cross sections when including the contribution of rotational excitations to the electron scattering.

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“…This method requires interaction crosssections between the projectile and the target material. The first task in work package 5 provides evaluated data sets of cross-sections for the interaction of charged particles with ingredients of the DNA that are obtained at PTB [33,34] to be used in the Monte Carlo codes. The cross sections for electron scattering on some of the DNA constituents have already been implemented into the PTB track structure code PTra.…”

Section: Multi-scale Modelmentioning

confidence: 99%

Biologically Weighted Quantities in Radiotherapy: an EMRP Joint Research Project

Rabus

Hilgers

Sharpe

et al. 2014

EPJ Web of Conferences

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Abstract. Funded within the European Metrology Research Programme (EMRP) [1], the joint research project "Biologically weighted quantities in radiotherapy" (BioQuaRT) [2] aims to develop measurement and simulation techniques for determining the physical properties of ionising particle tracks on different length scales (about 2 nm to 10 μm), and to investigate the correlation of these track structure characteristics with the biological effects of radiation at the cellular level. Work package 1 develops micro-calorimeter prototypes for the direct measurement of lineal energy and will characterise their response for different ion beams by experiment and modelling. Work package 2 develops techniques to measure particle track structure on different length scales in the nanometre range as well as a measurement device integrating a silicon microdosimeter and a nanodosimeter. Work package 3 investigates the indirect effects of radiation based on probes for quantifying particular radical and reactive oxygen species (ROS). Work package 4 focuses on the biological aspects of radiation damage and will produce data on initial DNA damage and late effects for radiotherapy beams of different qualities. Work package 5 provides evaluated data sets of DNA cross-sections and develops a multi-scale model to address microscopic and nanometric track structure properties. The project consortium includes three linked researchers holding so-called Researcher Excellence Grants, who carry out ancillary investigations such as developing and benchmarking a new biophysical model for induction of early radiation damage and developing methods for the translation of quantities derived from particle track structure to clinical applications in ion beam therapy.

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Differential elastic and total electron scattering cross sections of tetrahydrofuran

Cited by 58 publications

References 41 publications

Total, elastic, and inelastic cross sections for positron and electron collisions with tetrahydrofuran

Total, elastic, and inelastic cross sections for positron and electron collisions with tetrahydrofuran

Total electron-scattering cross sections of pyrimidine

Biologically Weighted Quantities in Radiotherapy: an EMRP Joint Research Project

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