Electron-ion recombination of Si IV forming Si III: Storage-ring measurement and multiconfiguration Dirac-Fock calculations

Abstract

The electron-ion recombination rate coefficient for Si IV forming Si III was measured at the heavy-ion storage-ring TSR. The experimental electron-ion collision energy range of 0-186 eV encompassed the 2p(6) nl n'l' dielectronic recombination (DR) resonances associated with 3s to nl core excitations, 2s 2p(6) 3s nl n'l' resonances associated with 2s to nl (n=3,4) core excitations, and 2p(5) 3s nl n'l' resonances associated with 2p to nl (n=3,...,infinity) core excitations. The experimental DR results are compared with theoretical calculations using the multiconfiguration Dirac-Fock (MCDF) method for DR via the 3s to 3p n'l' and 3s to 3d n'l' (both n'=3,...,6) and 2p(5) 3s 3l n'l' (n'=3,4) capture channels. Finally, the experimental and theoretical plasma DR rate coefficients for Si IV forming Si III are derived and compared with previously available results.

arXiv comment13 pages, 9 figures, 3 tables. Accepted for publication in Physical Review A

References in corpus (10)

• Radiative recombination data for modelling dynamic finite-density plasmas
• Collisional Ionization Equilibrium for Optically Thin Plasmas. I. Updated Recombination Rate Coefficients for Bare though Sodium-like Ions
• Metallicity of the intergalactic medium using pixel statistics: III. Silicon
• Storage ring measurement of the C IV recombination rate coefficient
• Spectroscopic LSJ notation for atomic levels obtained from relativistic calculations
• Experimental Mg IX photorecombination rate coefficient
• Dielectronic Recombination of Fe XV forming Fe XIV: Laboratory Measurements and Theoretical Calculations
• Chemical Abundances and the Metagalactic Radiation Field at High Redshift
• Metal abundances and kinematics of quasar absorbers.- I. Absorption systems toward J2233-606
• Experimental N V and Ne VIII low-temperature dielectronic recombination rate coefficients

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