Study of coupled-cluster correlations on electromagnetic transitions and   hyperfine structure constants of W VI
  This work presents precise calculations of important electromagnetic transition amplitudes along with detail of their many-body correlations using relativistic coupled cluster method. Studies of hyperfine interaction constants, useful for plasma diagnostic, with this correlation exhaustive many-body approach are another important area of this work. The calculated oscillator strengths of allowed transitions, amplitudes of forbidden transitions and lifetimes are compared with the other theoretical results wherever available and they show a good agreement. Hyperfine constants of different isotopes of W VI, presented in this paper will be helpful to get accurate picture of abundances of this element in different astronomical bodies. 
Anal Bhowmik, Sourav Roy, Narendra Nath Dutta and Sonjoy Majumder
physics.atom-ph