67 citations · 1k across the 73 of their papers we have counts for
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Fock-space relativistic coupled-cluster study of systematic shifts and fine-structure constant sensitivity in {\rm Cf}, {\rm Cm} and {\rm Bk} highly charged ions
Palki Gakkhar, D. Angom, B. K. Mani
Highly charged ions (HCIs) are among the most promising candidates proposed for the development of next-generation optical clocks and the precision tests of fundamental physics. In…
FSRCC two-valence calculations of clock transition properties, dipole polarizability and isotope shifts in Fermionic and Bosonic Sr
Palki Gakkhar, D Angom, B K Mani
We employ an all-particle multireference Fock-space relativistic coupled-cluster (FSRCC) theory to study the clock transition in both Fermionic an…
Probing transition rates, nuclear moments and electric dipole polarizability in nobelium using multireference FSRCC and PRCC theories
Ravi Kumar, Palki Gakkhar, D. Angom +1
We employ an all-particle multireference Fock-space relativistic coupled-cluster (FSRCC) theory to compute the ionization potential, excitation energy, transition rate and hyperfin…
Fock-space perturbed relativistic coupled-cluster calculations of electric dipole polarizability and nuclear spin-dependent parity non-conservation in Cs
Suraj Pandey, Ravi Kumar, D. Angom +1
We implement the Fock-space perturbed relativistic coupled-cluster theory to compute the electric dipole polarizability of ground and low lying excited states, and nuclear spin-dep…
Fock-space relativistic coupled-cluster calculations of clock transition properties in Pb
Palki Gakkhar, Ravi Kumar, D. Angom +1
We have implemented an all-particle multireference Fock-space relativistic coupled-cluster theory to probe clock transition in an even isotope…
Fock-space perturbed relativistic coupled-cluster theory for electric dipole polarizability of one-valence atomic systems: Application to Al and In
Ravi Kumar, D. Angom, B. K. Mani
We have developed a Fock-space relativistic coupled-cluster theory based method for the calculation of electric dipole polarizability of one-valence atoms and ions. We employ this…
RCC calculation of electric dipole polarizability and correlation energy of Cn, Nh and Og: Correlation effects from lighter to superheavy elements
Ravi Kumar, S. Chattopadhyay, D. Angom +1
We employ a fully relativistic coupled-cluster theory to calculate the ground-state electric dipole polarizability and electron correlation energy of superheavy elements Cn, Nh…
Fock-space relativistic coupled-cluster calculation of hyperfine induced clock transition in Al
Ravi Kumar, S. Chattopadhyay, D. Angom +1
We have developed an all-particle Fock-space relativistic coupled-cluster method to calculate the properties of two-valence atoms and ions. Using the method we compute the properti…
RCCPAC: A parallel relativistic coupled-cluster program for closed-shell and one-valence atoms and ions in FORTRAN
B. K. Mani, Siddhartha Chattopadhyay, D. Angom
We report the development of a parallel FORTRAN code, RCCPAC, to solve the relativistic coupled-cluster equations for closed-shell and one-valence atoms and ions. The parallelizati…
Triple excitations in perturbed relativistic coupled-cluster theory and Electric dipole polarizability of groupIIB elements
S. Chattopadhyay, B. K. Mani, D. Angom
We use perturbed relativistic coupled-cluster (PRCC) theory to compute the electric dipole polarizabilities of Zn, Cd and Hg. The computations are done using the Dirac-Coulomb-…
Electric dipole polarizability of alkaline-Earth-metal atoms from perturbed relativistic coupled-cluster theory with triples
S. Chattopadhyay, B. K. Mani, D. Angom
The perturbed relativistic coupled-cluster (PRCC) theory is applied to calculate the electric dipole polarizabilities of alkaline Earth metal atoms. The Dirac-Coulomb-Breit atomic…
Electric dipole polarizabilities of doubly ionized alkaline Earth metal ions from perturbed relativistic coupled-cluster theory
S. Chattopadhyay, B. K. Mani, D. Angom
Using perturbed relativistic coupled-cluster (PRCC) theory we compute the ground state electric dipole polarizability, , of doubly ionized alkaline earth metal ions $\rm{Mg}^{2+…
Electric dipole polarizabilities of alkali metal ions from perturbed relativistic coupled-cluster theory
S. Chattopadhyay, B. K. Mani, D. Angom
We use the perturbed relativistic coupled-cluster theory to compute the static electric dipole polarizabilities of the singly ionized alkali atoms, namely, Na, , Rb, Cs…
Perturbed Coupled-Cluster theory to calculate dipole polarizabilities of closed shell systems: Application to Ar, Kr, Xe and Rn
S. Chattopadhyay, B. K. Mani, D. Angom
We use perturbed relativistic coupled-cluster (PRCC) theory to calculate the electric dipole polarizability of noble gas atoms Ar, Kr, Xe and Rn. We also provide a detailed descrip…
Electric dipole polarizability from perturbed Relativistic Coupled-Cluster Theory: application to Neon
S. Chattopadhyay, B. K. Mani, D. Angom
We develop a method based on the relativistic coupled-cluster theory to incorporate a perturbative interaction to the no-pair Dirac-Coulomb atomic Hamiltonian. The method is genera…
Observation of the nuclear magnetic octupole moment of Yb from precise measurements of hyperfine structure in the state
Alok K. Singh, D. Angom, Vasant Natarajan
We measure hyperfine structure in the metastable state of Yb and extract the nuclear magnetic octupole moment. We populate the state using dipole-allowed transiti…
Triple excitation in relativistic coupled-cluster theory and properties of one-valence systems Rb and Sr
B. K. Mani, Dilip Angom
We examine the contributions from triple excitation cluster operators in the relativistic coupled-cluster theory in atoms and ions. For this, we propose a tensor representation of…
Relativistic coupled-cluster theory of nuclear spin-dependent parity non-conservation
B. K. Mani, D. Angom
We have developed a relativistic coupled-cluster theory to incorporate nuclear spin-dependent interaction Hamiltonians perturbatively. In this theory, the coupled-cluster operators…
Relativistic coupled-cluster calculations of nuclear spin-dependent parity non-conservation in Cs, Ba and Ra
B. K. Mani, D. Angom
We have developed a relativistic coupled-cluster theory to incorporate nuclear spin-dependent interaction Hamiltonians perturbatively. This theory is ideal to calculate parity viol…
Fock space relativistic coupled-Cluster calculations of Two-Valence Atoms
B. K. Mani, D. Angom
We have developed an all particle Fock-space relativistic coupled-cluster method for two-valence atomic systems. We then describe a scheme to employ the coupled-cluster wave functi…
Properties from relativistic coupled-cluster without truncation: hyperfine constants of , , and
B. K. Mani, D. Angom
We demonstrate an iterative scheme for coupled-cluster properties calculations without truncating the dressed properties operator. For validation, magnetic dipole hyperfine constan…
Relativistic coupled-cluster calculations of Ne, Ar, Kr and Xe: correlation energies and dipole polarizabilities
B. K. Mani, D. Angom
We have carried out a detailed and systematic study of the correlation energies of inert gas atoms Ne, Ar, Kr and Xe using relativistic many-body perturbation theory and relativist…
Probing CP violation with the electric dipole moment of atomic mercury
K. V. P. Latha, D. Angom, B. P. Das +1
The electric dipole moment of atomic Hg induced by the nuclear Schiff moment and tensor-pseudotensor electron-nucleus interactions has been calculated. For this, we have de…
Efficient symbol evaluations for atomic calculations
K. V. P. Latha, Dilip Angom, B. P. Das
We have developed an efficient tabulation scheme to evaluate symbol for atomic calculations. The scheme is appropriate for coupled-cluster based calculations. In particular, f…