Many-body effects in hyperfine interactions in 205Pb+

Majumder, Sonjoy; Sahoo, B. K.; Chaudhuri, Rajat K.; Das, B. P.; Mukherjee, Debashis

doi:10.1140/epjd/e2006-00248-2

Cited by 5 publications

(5 citation statements)

References 16 publications

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“…The intensities of these transitions allow us to measure the concentration of impurity ions in 2 tokamak which originate in the high temperature interior of the discharge [5]. From many-body points of view, the importance of these results lies in the estimation of the accuracy of the electronic wave function through out the radial extent of the atomic systems by comparing the results with experimental measurements [6]. Also computed results are only means of estimations for many of these transitions wherever experimental measurements are difficult.…”

Section: Introductionmentioning

confidence: 99%

Ab initiocalculations of forbidden transition amplitudes and lifetimes of the low-lying states inV4+

et al. 2007

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We report electric quadrupole ͑E2͒ and magnetic dipole ͑M1͒ transition amplitudes of the first few low-lying states of quadruply ionized vanadium ͑V 4+ ͒, which are important in various experimental applications and astrophysics. To our knowledge, most of these presented results are determined for the first time in the literature. A relativistic multireference Fock-space coupled-cluster theory with single ͑S͒, double ͑D͒, and partial triple ͑T͒ excitations is employed to compute the forbidden transition probabilities and lifetimes of the low-lying states in V 4+ . Estimations of different correlation effects arising through the above formalism have been highlighted by investigating core and valence electron excitations. A long lifetime is found for the first excited 3d 2 D 5/2 state, which suggests that V 4+ may be one of the useful candidates for many important studies.

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Section: Introductionmentioning

confidence: 99%

Ab initiocalculations of forbidden transition amplitudes and lifetimes of the low-lying states inV4+

et al. 2007

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“…This table shows a comparative estimations of core-polarization, core-correlation and paircorrelation effects in these transitions. The diagrams involving these contributions are discussed in our earlier papers [31]. Though all order effects of core-polarization and paircorrelation contributions are considered in the calculations here, this table gives only the lowest order contributions for…”

Section: Resultsmentioning

confidence: 99%

Theoretical spectroscopic studies of the atomic transitions and lifetimes of low-lying states in Ti IV

Mandal¹,

Dixit²,

Sahoo³

et al. 2008

J. Phys. B: At. Mol. Opt. Phys.

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The 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-art all-order many-body theory called Coupled Cluster (CC) theory in the relativistic frame-work. 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 very good agreement with the measurements. Also we compare our calculated electric dipole (E1) transition amplitudes of few transitions with recent many-body calculations by different groups. We have also carried out the calculations for the lifetimes of the low-lying states of Ti IV. A long lifetime is found for the first excited 3d 2 D 5/2 state, which suggested that Ti IV may be one of the useful candidates for many important studies. Most of the results reported here are not available in the literature, to the best of our knowledge.

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“…However, we also include a class of valence triple excitations in a peturbative way as mentioned in Ref. (Majumder et al 2007;Dixit et al 2007a). The correlated single valence states generated by the coupled-cluster single, double and valence triple excitations are applied to calculate different electromagnetic transition properties of present interest (Dixit et al 2007a;Dixit et al 2007b) .…”

Section: Theorymentioning

confidence: 99%

Precise Calculations of Astrophysically Important Allowed and Forbidden Transitions of Xe viii

Bhowmik

Dutta

Roy

2017

ApJ

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The present work reports transition line parameters for Xe VIII, which are potentially important for astrophysics in view of recent observations of multiply ionized xenon in hot white dwarfs. The relativistic coupled-cluster method is employed here to calculate the E1, E2, and M 1 transition line parameters with high accuracy. The E1 oscillator strengths and probabilities of E2 and M 1 transitions are determined using theoretical amplitudes and experimental energy values. The calculated branching ratios and the lifetimes are supplemented to the transition parameters. Accurate presentation of these calculated data is crucial for density estimation in several stellar and inter-stellar media.

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Many-body effects in hyperfine interactions in 205Pb+

Cited by 5 publications

References 16 publications

Ab initiocalculations of forbidden transition amplitudes and lifetimes of the low-lying states inV4+

Ab initiocalculations of forbidden transition amplitudes and lifetimes of the low-lying states inV4+

Theoretical spectroscopic studies of the atomic transitions and lifetimes of low-lying states in Ti IV

Precise Calculations of Astrophysically Important Allowed and Forbidden Transitions of Xe viii

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