Dielectronic recombination in He-like titanium ions

Abstract

Dielectronic recombination (DR) has been studied in highly charged Helike Ti ions using an electron beam ion trap. X-rays emitted from radiative recombination (RR) and DR were observed as the electron beam energy was scanned through the resonances. Differential DR resonant strengths were determined by normalizing the DR x-ray intensity to the RR intensity using theoretical RR cross sections. KLn (2 n 5) resonant strengths were determined for He-like Ti ions. The differential resonant strengths were calibrated without reference to any theoretical DR calculations while the electron energy scale was derived with reference to the well-known energy for ionization of the He-like and H-like ions from the ground state. Calibration in this way facilitates a more exacting comparison between theory and experiment than has been reported previously. To facilitate this comparison, total and differential theoretical resonance strengths were calculated. These calculations were found to be in good agreement with the measured results.

Theoretical study of the KLL dielectronic recombination for highly charged iodine ions

“…The DR process is important in high-temperature plasmas, where it strongly affects both the charge state distribution and the X-ray spectrum [2][3][4][5][6]. X-ray radiation from the DR process can also be used as a diagnostic tool.…”

Dielectronic recombination data for dynamic finite-density plasmas

“…of Li + (Závodszky et al 1998;Saghiri et al 1999), of C 4+ (Andersen et al 1989(Andersen et al , 1990Kilgus et al 1990Kilgus et al , 1993Schuch et al 1997), O 6+ (Andersen et al 1989(Andersen et al , 1990, Ne 8+ (Zong et al 1998), Si 12+ (Kenntner et al 1995;Bartsch et al 1997), Ar 16+ (Ali et al 1990(Ali et al , 1991Dewitt et al 1991), and Ti 20+ (O'Rourke et al 2004), Fe 24+ (Beiersdorfer et al 1992), Ni 26+ and Mo…”

KLL Dielectronic Recombination of Highly Charged Sulfur and Silicon Ions

“…The Auger decay rates and resonant strengths were calculated by using a code developed by Y. M. Li et al [15]. These codes were already used successfully for the calculations of DR resonance strengths and energy position of different atomic ions [6,16,17]. The generalized Breit interactions (GBI) and the decay through forbidden radiation are very weak; therefore such effects were not taken into account.…”