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    Electric quadrupole transition probabilities and line strengths of Ti11+
    (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2014) Gokce, Yasin; Celik, Gultekin; Yildiz, Murat
    Electric quadrupole transition probabilities and line strengths have been calculated using the weakest bound electron potential model for sodium-like titanium, considering many transition arrays. We employed numerical Coulomb approximation and non-relativistic Hartree-Fock wavefunctions for the expectation values of radii in determination of parameters of the model. The necessary energy values have been taken from experimental data in the literature. The calculated electric quadrupole line strengths have been compared with available data in the literature and good agreement has been obtained. Moreover, some electric quadrupole transition probability and line strength values not existing in the literature for some highly excited levels have been obtained using this method. (C) 2014 Elsevier Inc. All rights reserved.
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    Electric quadrupole transition probabilities for atomic lithium
    (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2014) Celik, Gultekin; Gokce, Yasin; Yildiz, Murat
    Electric quadrupole transition probabilities for atomic lithium have been calculated using the weakest bound electron potential model theory (WBEPMT). We have employed numerical non-relativistic Hartree-Fock wavefunctions for expectation values of radii and the necessary energy values have been taken from the compilation at NIST. The results obtained with the present method agree very well with the Coulomb approximation results given by Caves (1975). Moreover, electric quadrupole transition probability values not existing in the literature for some highly excited levels have been obtained using the WBEPMT. (c) 2014 Elsevier Inc. All rights reserved.
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    Oscillator strengths and transition probabilities for singly ionized terbium
    (CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS, 2014) Ates, Sule; Gokce, Yasin; Celik, Gultekin; Yildiz, Murat
    Electric dipole transition probabilities and oscillator strengths for singly ionized terbium (Tb II) have been calculated with the weakest bound electron potential model (WBEPM) theory using experimental energy levels and theoretical expectation values of orbital radii corresponding to those energy levels under the assumption of the Jj coupling scheme. The transition probabilities and the oscillator strengths calculated have been compared with available data in the literature. A good agreement has been obtained. In this work, the WBEPM theory has been applied to heavy atoms, such as Tb II, for the first time.