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Title: An investigation of antiprotons collisions with positronium atom in Debye plasma environments

Abstract

The effects of Debye plasmas on antihydrogen formation and ionization processes are investigated in antiprotons (p{sup ¯}) and positronium (Ps) collisions. The classical trajectory Monte Carlo method with Debye Hückel potentials has been used for cross section calculations. In this process, antihydrogen formation and ionization cross sections have been calculated in unscreened as well as in Debye plasmas conditions in energies ranging from 1 to 500 keV. Partial cross sections for antihydrogen formation are also calculated which show the largest cross sections correspond to production of antihydrogen in the n = 2 (2s, 2p) states. Comparative study has been carried out to determine the differences of cross sections in screening and unscreening cases. The results show that the cross sections for both antihydrogen formation and positronium ionization depend on Debye screening lengths as well as on collision energies. The effects of plasmas conditions on antihydrogen formation and positronium ionization are explained in terms of classical trajectory framework. Our results for the unscreened case are in agreement with previously reported results.

Authors:
; ;  [1]
  1. Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 106, Taiwan (China)
Publication Date:
OSTI Identifier:
22410284
Resource Type:
Journal Article
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1070-664X
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANTIPROTONS; ATOMS; COLLISIONS; CROSS SECTIONS; DEBYE LENGTH; IONIZATION; KEV RANGE; MONTE CARLO METHOD; PLASMA; POSITRONIUM; POTENTIALS; TRAJECTORIES

Citation Formats

Pandey, M. K., E-mail: pandey@pub.iams.sinica.edu.tw, Lin, Y.-C., and Ho, Y. K., E-mail: ykho@pub.iams.sinica.edu.tw. An investigation of antiprotons collisions with positronium atom in Debye plasma environments. United States: N. p., 2015. Web. doi:10.1063/1.4919863.
Pandey, M. K., E-mail: pandey@pub.iams.sinica.edu.tw, Lin, Y.-C., & Ho, Y. K., E-mail: ykho@pub.iams.sinica.edu.tw. An investigation of antiprotons collisions with positronium atom in Debye plasma environments. United States. doi:10.1063/1.4919863.
Pandey, M. K., E-mail: pandey@pub.iams.sinica.edu.tw, Lin, Y.-C., and Ho, Y. K., E-mail: ykho@pub.iams.sinica.edu.tw. Fri . "An investigation of antiprotons collisions with positronium atom in Debye plasma environments". United States. doi:10.1063/1.4919863.
@article{osti_22410284,
title = {An investigation of antiprotons collisions with positronium atom in Debye plasma environments},
author = {Pandey, M. K., E-mail: pandey@pub.iams.sinica.edu.tw and Lin, Y.-C. and Ho, Y. K., E-mail: ykho@pub.iams.sinica.edu.tw},
abstractNote = {The effects of Debye plasmas on antihydrogen formation and ionization processes are investigated in antiprotons (p{sup ¯}) and positronium (Ps) collisions. The classical trajectory Monte Carlo method with Debye Hückel potentials has been used for cross section calculations. In this process, antihydrogen formation and ionization cross sections have been calculated in unscreened as well as in Debye plasmas conditions in energies ranging from 1 to 500 keV. Partial cross sections for antihydrogen formation are also calculated which show the largest cross sections correspond to production of antihydrogen in the n = 2 (2s, 2p) states. Comparative study has been carried out to determine the differences of cross sections in screening and unscreening cases. The results show that the cross sections for both antihydrogen formation and positronium ionization depend on Debye screening lengths as well as on collision energies. The effects of plasmas conditions on antihydrogen formation and positronium ionization are explained in terms of classical trajectory framework. Our results for the unscreened case are in agreement with previously reported results.},
doi = {10.1063/1.4919863},
journal = {Physics of Plasmas},
issn = {1070-664X},
number = 5,
volume = 22,
place = {United States},
year = {2015},
month = {5}
}