172 citations · 1.8k across the 100 of their papers we have counts for
9 papers · 2 filters
Random Phase Approximation For allowed and Parity Non-conserving Electric Dipole Transition Amplitudes and its connection with Many-Body Perturbation Theory and Coupled Cluster Theory
Geetha Gopakumar, Chiranjib Sur, Bhanu Pratap Das +3
The connections between the Random Phase Approximation (RPA) and Many-Body Perturbation Theory (MBPT) and its all order generalisation, the Coupled- Cluster Theory (CCT) have been…
Relativistic Coupled-Cluster Theory of Atomic Parity Nonconservation: Application to Ba
Bijaya K. Sahoo, Rajat Chaudhuri, B. P. Das +1
We report the result of our {\it ab initio} calculation of the parity nonconserving electric dipole transition amplitude in base…
A New Limit for the Coupling Constant of the Electron-Nucleus Scalar-Pseudoscalar Interaction
Bijaya K. Sahoo, Rajat K. Chaudhuri, B. P. Das +2
We report the results of our calculations of the atomic electric dipole moments of cesium and thallium arising from the electron-nucleus scalar-pseudoscalar interaction. The calcul…
Nuclear Structure corrections for Parity Non-conservation in Atomic Ba and Ra
P. K. Panda, B. P. Das
We calculate the binding energy, charge radii in Ba--Ba and Ra--Ra using the relativistic mean field theory which includes scalar and vector mesons.…
Relativistic and correlation effects in atoms
B. P. Das, K. V. P. Latha, Bijaya K. Sahoo +3
This review article deals with some case studies of relativistic and correlation effects in atomic systems. After a brief introduction to relativistic many-electron theory, a numbe…
Electric quadrupole moment of the state in and its role in an optical frequency standard
Chiranjib Sur, K. V. P. Latha, Rajat K. Chaudhuri +2
The electric quadrupole moment for the state of , one of the most important candidates for an optical clock, has been calculated using the relati…