Resonances in Positronic Lithium under Quantum Plasmas

Publication Issue: 
Volume 39, Issue 2, 2018
Page No: 
Date Received: 
Sunday, January 28, 2018
Authors' Name: 
Arijit Ghoshal
Yew Kam Ho
Authors' Affiliation and Address: 
Department of Mathematics, Burdwan University, Golapbag, Burdwan 713 104, West Bengal, India
Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei, Taiwan 106
The stabilization method (SM) is employed to look into the low-lying resonances in positronic lithium (e+Li) embedded in quantum plasmas (QP). Screened interaction in QP is described by the Debye-Huckel cosine potential (DHCP). Two resonances have been found to appear below the Ps(n=2) excitation threshold (EPs(2) th).Energy and the width of those resonances are determined by calculating the density of resonance states. It is seen that the position of the resonances is gradually pushed towards the Ps(2s) with increasing plasma screening strength. For the unscreened case, our reported results are in close accord with other reliable results available in the literature. To the best of our knowledge, the present results will be the first reported results of resonance in e+Li under QP.
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