Subhasish Mandal et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 055701 doi:10.1088/0953-4075/41/5/055701
Subhasish Mandal1,5, Gopal Dixit2, B K Sahoo3, R K Chaudhuri4 and Sonjoy Majumder2
Show affiliationsThe astrophysically important electric quadrupole (E2) and magnetic dipole (M1) transitions for the low-lying states of triply ionized titanium (Ti IV) are calculated very accurately using a state-of-the-art all-order many-body theory called coupled cluster (CC) method in the relativistic framework. Different many-body correlations of the CC theory has been estimated by studying the core and valence electron excitations to the unoccupied states. The calculated excitation energies of different states are in excellent agreement with the measurements. Also, we compare our calculated electric dipole (E1) amplitudes of few transitions with recent many-body calculations by others. The lifetimes of the low-lying states of Ti IV have been estimated and long lifetime is found for the first excited 3d2D5/2 state, which suggested that Ti IV may be one of the useful candidates for many fundamental studies of physics. Most of the forbidden transition results reported here are not available in the literature, to the best of our knowledge.
32.70.Cs Oscillator strengths, lifetimes, transition moments
31.15.bw Coupled-cluster theory
31.30.J- Relativistic and quantum electrodynamic (QED) effects in atoms, molecules, and ions
Issue 5 (14 March 2008)
Received 7 September 2007, in final form 17 January 2008
Published 26 February 2008
Subhasish Mandal et al 2008 J. Phys. B: At. Mol. Opt. Phys. 41 055701
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