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Title: Application of relativistic coupled-cluster theory to electron impact excitation of Mg+ in the plasma environment
Authors: Sharma, Lalita
Sahoo B.K.
Malkar P.
Srivastava, Rajesh
Published in: European Physical Journal D
Abstract: Abstract: A relativistic coupled-cluster theory is implemented to study electron impact excitations of atomic species. As a test case, the electron impact excitations of the 3s2S1∕2–3p2P1∕2;3∕2 resonance transitions are investigated in the singly charged magnesium (Mg+) ion using this theory. Accuracies of wave functions of Mg+ are justified by evaluating its attachment energies of the relevant states and compared with the experimental values. The continuum wave function of the projectile electron are obtained by solving Dirac equations assuming distortion potential as static potential of the ground state of Mg+. Comparison of the calculated electron impact excitation differential and total cross-sections with the available measurements are found to be in very good agreements at various incident electron energies. Further, calculations are carried out in the plasma environment in the Debye-Hückel model framework, which could be useful in the astrophysics. Influence of plasma strength on the cross-sections as well as linear polarization of the photon emission in the 3p2P3∕2–3s2S1∕2 transition is investigated for different incident electron energies. Graphical abstract: [Figure not available: see fulltext.]. © 2018, EDP Sciences, SIF, Springer-Verlag GmbH Germany, part of Springer Nature.
Citation: European Physical Journal D (2018), 72(1): -
Issue Date: 2018
Publisher: Springer New York LLC
Keywords: Atomic Physics
ISSN: 14346060
Author Scopus IDs: 14046198100
Author Affiliations: Sharma, L., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Sahoo, B.K., Atomic and Molecular Physics Division, Physical Research Laboratory, Navrangpura, Ahmedabad, 380009, India, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, 430071, China
Malkar, P., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Srivastava, R., Department of Physics, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: B.K.S. thanks Dr. Madhulita Das for many useful discussions and acknowledges financial support from CAS through the PIFI fellowship under the project number 2017VMB0023. L.S. and R.S. acknowledge the support from the Department of Science and Technology (DST), New Delhi for this work. P.M. is thankful to Ministry of Human Resource and Development (MHRD) for providing her research assistantship.
Corresponding Author: Srivastava, R.; Department of Physics, Indian Institute of Technology RoorkeeIndia; email:
Appears in Collections:Journal Publications [PH]

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