Journal ArticleDOI
Positron Scattering from Molecules: An Experimental Cross Section Compilation for Positron Transport Studies and Benchmarking Theory
Reads0
Chats0
TLDR
In this paper, the authors present a compilation of recommended positron-molecule cross sections for a range of scattering processes including elastic scattering, vibrational excitation, discrete electronic-state excitation and positronium formation, ionization.Abstract:
We present a compilation of recommended positron–molecule cross sections for a range of scattering processes including elastic scattering, vibrational excitation, discrete electronic-state excitation, positronium formation, ionization, and also for the grand total cross section. Where possible, in particular for possible application in positron transport simulations for a given molecule, we try and list data for energies in the range 0.1–1000 eV although in practice the actual energy is highly target–molecule and scattering process specific. Aside from being relevant to positron transport studies, through, for example, Monte Carlo simulations, the present compilation should also be germane for benchmarking the validity and accuracy of positron–molecule scattering calculations and, just as importantly, to allow a comparison with corresponding electron scattering results. That latter comparison can shed real light on the projectile–target interactions that underpin the scattering dynamics.read more
Citations
More filters
Journal ArticleDOI
Recommended Positron Scattering Cross Sections for Atomic Systems
TL;DR: In this paper, a critical analysis of available experimental and theoretical cross section data for positron scattering from atomic systems is presented, and recommended cross sections for total scattering, positronium formation, inelastic scattering, and direct ionization processes.
Journal ArticleDOI
Electronic excitation of H 2 O by positron impact
TL;DR: In this article, the electronic excitation of H2O molecule by positron impact for the (1b1→4a1)1B1 and (3a1→ 4a1)-1A1 transitions has been calculated from threshold to 60 eV.
Journal ArticleDOI
Low-energy elastic scattering of positrons by O 2
TL;DR: In this article, the authors present a theoretical investigation on positron scattering by computing the Elastic Differential and Integral Cross Sections at both the static and static plus correlation-polarization levels of approximation in the $0.1 -100$ eV.
Journal ArticleDOI
Study of inelastic channels by positron impact on simple molecules
Suvam Singh,Bobby Antony +1 more
TL;DR: In this article, the authors used the modified form of the well-known spherical complex optical potential formalism and the complex scattering potential-ionization contribution method to calculate the positronium formation cross section.
Journal ArticleDOI
Positron scattering from pyridine.
David Stevens,Tamara Babij,Joshua Machacek,Stephen Buckman,Michael J. Brunger,Ronald D. White,Gustavo García,Francisco J. Blanco,L. Ellis-Gibbings,James Sullivan +9 more
TL;DR: Quite good agreement is seen between the calculations and measurements although some discrepancies remain which may require further investigation and it is hoped that the present study will stimulate development of ab initio level theoretical methods to be applied to this important scattering system.
References
More filters
Journal ArticleDOI
Plasma-liquid interactions: A review and roadmap
Peter Bruggeman,Mark J. Kushner,Bruce R. Locke,Jge Gardeniers,William Graham,David B. Graves,Rchm Hofman-Caris,D Marić,Jonathan P. Reid,E Ceriani,D. Fernandez Rivas,John E. Foster,Sean C. Garrick,Yury Gorbanev,Satoshi Hamaguchi,Felipe Iza,Helena Jablonowski,E. Klimova,Juergen F. Kolb,František Krčma,Petr Lukes,Zdenko Machala,Ilya Marinov,Davide Mariotti,S. Mededovic Thagard,Daisuke Minakata,Erik C. Neyts,Joanna Pawłat,Z. Lj. Petrović,R Pflieger,Stephan Reuter,DC Daan Schram,Sandra Schröter,Manabu Shiraiwa,Barbora Tarabová,Pa Tsai,Jrr Verlet,T. von Woedtke,Kevin R. Wilson,Kyuichi Yasui,G. Zvereva +40 more
TL;DR: A review of the state-of-the-art of this multidisciplinary area and identifying the key research challenges is provided in this paper, where the developments in diagnostics, modeling and further extensions of cross section and reaction rate databases are discussed.
Journal ArticleDOI
Variable Phase Approach to Potential Scattering
Journal ArticleDOI
Low-energy positron interactions with atoms and molecules
TL;DR: A review of low-energy positron interactions with atoms and molecules is given in this article, including elastic scattering, electronic and vibrational excitation, ionization, positronium formation and annihilation.
Journal ArticleDOI
Total-cross-section measurements for positrons and electrons colliding with H 2 , N 2 , and C O 2
TL;DR: In this article, total scattering cross sections have been measured in the same apparatus for positrons and electrons colliding with each of the molecules at the respective positronium-formation thresholds using a beam transmission technique.
Journal ArticleDOI
Plasma and trap-based techniques for science with positrons
TL;DR: There has been a wealth of new science involving low-energy antimatter (i.e., positrons and antiprotons) at energies ranging from 10 to less than 10 eV as mentioned in this paper.