Ionization probabilities of Ne, Ar, Kr, and Xe by proton impact for different initial states and impact energies

Montanari, C. C.; Miraglia, J. E.

doi:10.1016/j.nimb.2017.07.001

Cited by 6 publications

(3 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Further details of the calculation are given in Ref. [10]. We display our total CDW ionization cross sections for the six essential elements by the impact of the six projectiles in Fig.…”

Section: Theory: Ionization Of Atomsmentioning

confidence: 99%

See 1 more Smart Citation

Ionization of biological molecules by multicharged ions using the stoichiometric model

Mendez

Montanari

Miraglia

2020

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

In the present work, we investigate the ionization of molecules of biological interest by the impact of multicharged ions in the intermediate to high energy range. We performed full non-perturbative distorted-wave calculations (CDW) for thirty-six collisional systems composed by six atomic targets: H, C, N, O, F and S -which are the constituents of most of the DNA and biological molecules-and six charged projectiles (antiprotons, H, He, B, C, and O). On account of the radiation damage caused by secondary electrons, we inspect the energy and angular distributions of the emitted electrons from the atomic targets. We examine seventeen molecules: DNA and RNA bases, DNA backbone, pyrimidines, tetrahydrofuran (THF), and CnHn compounds. We show that the simple stoichiometric model (SSM), which approximates the molecular ionization cross sections as a linear combination of the atomic ones, gives reasonably good results for complex molecules. We also inspect the extensively used Toburen scaling of the total ionization cross sections of molecules with the number of weakly bound electrons. Based on the atomic CDW results, we propose new active electron numbers, which improves significantly scaling for all the targets and ions studied here in the intermediate to the high energy region. The new scaling describes well the available experimental data for proton impact, including small molecules. We perform full molecular calculations for five nucleobases and test a modified stoichiometric formula based on the Mulliken charge of the composite atoms. The difference introduced by the new stoichiometric formula is less than 3%, which indicates the reliability of the SSM to deal with this type of molecules. The results of the extensive ion-target examination included in the present study allow us to assert that the SSM and the CDW-based scaling will be useful tools in this area.

show abstract

“…Further details of the calculation are given in Ref. [10]. We display our total CDW ionization cross sections for the six essential elements by the impact of the six projectiles in Fig.…”

Section: Theory: Ionization Of Atomsmentioning

confidence: 99%

“…Each atomic total cross section was calculated using 35-100 momentum transfer values, 28 fixed electron angles, and around 45 electron energies depending on the projectile impact energy. Further details of the calculation are given in [15].…”

Section: Theory: Ionization Of Atomsmentioning

confidence: 99%

Ionization of biological molecules by multicharged ions using the stoichiometric model

Mendez

Montanari

Miraglia

2020

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

show abstract

“…In other works within a three-body CDW-EIS approximation, more elaborate calculations were developed through the introduction of an exact numerical residual target continuum state in place of the above-mentioned effective Coulombic continuum. In this sense, the one-electron bound and continuum target eigenstates were calculated considering the same Hartree-Fock (HF) target potential and numerically solving the corresponding target Schrödinger equation [6,19]. These calculations lead to a larger computational time.…”

Section: Theorymentioning

confidence: 99%

Dynamic effective charge in the continuum of the CDW-EIS model for ionization in ion–atom collisions: angular and energy dependence

Rojas

Quinto

Rivarola

et al. 2023

J. Phys. B: At. Mol. Opt. Phys.

View full text Add to dashboard Cite

In this work, a dynamic charge is employed in the Continuum DistortedWave - Eikonal Initial State theoretical model to describe the non-Coulomb potential of the residual target for single ionisation in bare ion-multielectron atom collisions. A comparison between the well-known Belki'{c}'s prescription and the effective charge depending on emission-angle and -energy in the final residual-target continuum state is shown. The obtained results shown that this effective charge improves the description of double differential cross sections for backwards emission angles over the whole emission energy range allowing the calculation of simply differential and total cross sections.

show abstract

Evaluation of accurate uncertainty of measurement of L subshell ionization cross-sections

et al. 2022

View full text Add to dashboard Cite

Ionization probabilities of Ne, Ar, Kr, and Xe by proton impact for different initial states and impact energies

Cited by 6 publications

References 44 publications

Ionization of biological molecules by multicharged ions using the stoichiometric model

Ionization of biological molecules by multicharged ions using the stoichiometric model

Dynamic effective charge in the continuum of the CDW-EIS model for ionization in ion–atom collisions: angular and energy dependence

Evaluation of accurate uncertainty of measurement of L subshell ionization cross-sections

Contact Info

Product

Resources

About