Plasma effect on fastelectronimpactionization from 2p state of hydrogenlike ions
Plasma effects on the highenergy electronimpact ionization process from 2p orbital of Hydrogenlike ions embedded in weakly coupled plasmas are investigated in the first Born approximation. The plasma screening of the Coulomb interaction between charged particles is represented by the Debye Hückel model. The screening of Coulomb interactions decreases the ionization energies and varies the wave functions for not only the bound orbital but also the continuum; the number of the summation for the angularmomentum states in the generalized oscillator strength densities is reduced with the plasma screening stronger when the ratio of ε/I{sub 2p} (I{sub 2p} is the ionization energy of 2p state and ε is the energy of the continuum electron) is kept, and then the contribution from the lowerangularmomentum states dominates the generalized oscillator strength densities, so the threshold phenomenon in the generalized oscillator strength densities and the double differential cross sections are remarkable: The accessional minima, the outstanding enhancement, and the resonance peaks emerge a certain energy region, whose energy position and width are related to the vicinity between δ and the critical value δ{sub nl}{sup c}, corresponding to the special plasma condition when the bound state nl just enters the continuum; the multiple virtualstate enhancementmore »
 Authors:

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 School of Mathematics, Physics and Information Engineering, Jiaxing University, Jiaxing 314001 (China)
 Institute of Applied Physics and Computational Mathematics, P.O. Box 800926, Beijing 100088 (China)
 College of Material Sciences and Optoelectronic Technology, University of the Chinese Academy of Sciences, P.O. Box 4588, Beijing 100049 (China)
 Publication Date:
 OSTI Identifier:
 22218373
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 12; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 74 ATOMIC AND MOLECULAR PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANGULAR MOMENTUM; BORN APPROXIMATION; BOUND STATE; DIFFERENTIAL CROSS SECTIONS; ELECTRONION COLLISIONS; ELECTRONS; MULTICHARGED IONS; MULTIPOLE TRANSITIONS; OSCILLATOR STRENGTHS; PHOTOIONIZATION; PLASMA; VIRTUAL STATES; WAVE FUNCTIONS