Regular Article

Critical stability and structural properties of screened two-electron system in Feshbach resonance state

¹ Department of Physics, Aliah University, Newtown, Kolkata 700 156, India
² Department of Physics, Adamas University, Barasat, Kolkata 700 126, India
³ Belgharia Texmaco Estate School, Belgharia, Kolkata 700 056, India

^a e-mail: jsaha84@gmail.com

Received: 16 August 2019
Received in final form: 19 October 2019
Published online: 5 December 2019

Abstract

The position (E_r) and width (Γ) of the first S-symmetry Feshbach resonance state (FRS) of a two-electron Zee system bound via screened Coulomb interaction have been studied by adopting the soft wall strategy of the Stabilization method. Explicitly correlated Hylleraas type basis has been adopted under the variational framework to find the energy eigenstates. Critical nuclear charge (Z_c) of the Zee system in FRS has been reported for different screening parameters (λ). Moreover different structural properties i.e. expectation values of radial functions and the inter-particle angles of the system have been estimated for different λ and Z.