Journal article

Publication year: 1998

Pages: 4873-4886

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Volume number: 31

Issue number: 21

ISSN: 0953-4075

eISSN: 1361-6455

DOI Link: https://doi.org/10.1088/0953-4075/31/21/017

Publisher: IOP Publishing

Abstract: 
in the search for interference between radiative and dielectronic recombination (RR and DR), absolute recombination rate coefficients for Ar-like Ti4+ ions have been measured at the Heidelberg Test Storage Ring in the centre-of-mass energy range 0-80 eV. The dominant recombination channels beside RR is Delta n = 0 DR via the formation of Ti3+ (3s(2) 3p(5) 3d P-1 nl) and Ti3+(3s(2)3p(5)3d P-3 nl) intermediate doubly excited states. The Delta n = 0 Ti4+ DR rate coefficient in plasmas is inferred from this measurement. it is about a factor of 3 lower than the previously available result based on a semi-empirical calculation. Asymmetric lineshapes due to quantum mechanical interference as recently predicted theoretically for isoelectronic SC3+ ions have not been observed. The broad Ti3+(3s(2)3p(5)3d(2) F-2 DR resonance expected on the basis of multiconfiguration Hartree-Fock calculations at 3.0 eV with a width of 1.3 eV appears to be shifted towards zero centre-of-mass energy where an unexplained recombination rate enhancement of a factor of 2 beyond the sum of RR and DR rates is observed.

Harvard Citation style: Schippers, S., Bartsch, T., Brandau, C., Gwinner, G., Linkemann, J., Müller, A., et al. (1998) Photorecombination of Ti4+ ions: search for interference effects, recombination at low energies and rate coefficient in plasmas, Journal of Physics B: Atomic, Molecular and Optical Physics, 31(21), pp. 4873-4886. https://doi.org/10.1088/0953-4075/31/21/017

APA Citation style: Schippers, S., Bartsch, T., Brandau, C., Gwinner, G., Linkemann, J., Müller, A., Saghiri, A., & Wolf, A. (1998). Photorecombination of Ti4+ ions: search for interference effects, recombination at low energies and rate coefficient in plasmas. Journal of Physics B: Atomic, Molecular and Optical Physics. 31(21), 4873-4886. https://doi.org/10.1088/0953-4075/31/21/017