Nonresonant elastic scattering of lowenergy photons by atomic sodium confined in quantum plasmas
Abstract
The nonresonant elastic scattering of lowenergy photons by the bound valence electron in the ground state 3s of atomic sodium confined in quantum plasmas is investigated theoretically. The incident photon energy is assumed to be much smaller than the 3s3p excitation energy. The alkali atom sodium is first formulated as an effective oneelectron problem in which the attractive interaction between the valence electron and the atomic ion core is simulated by a spherically symmetric model potential. The ShuklaEliasson oscillatory exponential cosine screenedCoulomb potential model is then used to mimic the effective twobody (valencecore) interaction within quantum plasmas. Nonrelativistic calculations performed within the electric dipole approximation indicate that the nonresonant elastic photon scattering crosssection undergoes a dramatic growth by several orders of magnitude as the quantum wave number increases. A qualitative explanation of this phenomenon is presented. In the absence of the oscillatory cosine screening term, a similar growth is observed at larger values of the quantum wave number. Our computed relevant atomic data are in very good agreement with the experimental as well as the previous theoretical data for the zeroscreening (free atom) case, and with the very limited, accurate theoretical results available for the case of exponential screenedCoulomb twobodymore »
 Authors:
 Department of Physics, Indian Institute of Engineering Science and Technology, Shibpur Howrah, 711 103, West Bengal (India)
 Publication Date:
 OSTI Identifier:
 22408219
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Physics of Plasmas; Journal Volume: 22; Journal Issue: 3; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ATOMS; COULOMB FIELD; CROSS SECTIONS; ELASTIC SCATTERING; ELECTRIC DIPOLES; ELECTRONS; GROUND STATES; PHOTONS; QUANTUM PLASMA; SODIUM; SPHERICAL CONFIGURATION; SYMMETRY; THEORETICAL DATA; TWOBODY PROBLEM; VALENCE
Citation Formats
Ghosh, Avijit, Email: miduavijit@yahoo.com, and Ray, Debasis, Email: ray.debasis@gmail.com. Nonresonant elastic scattering of lowenergy photons by atomic sodium confined in quantum plasmas. United States: N. p., 2015.
Web. doi:10.1063/1.4916060.
Ghosh, Avijit, Email: miduavijit@yahoo.com, & Ray, Debasis, Email: ray.debasis@gmail.com. Nonresonant elastic scattering of lowenergy photons by atomic sodium confined in quantum plasmas. United States. doi:10.1063/1.4916060.
Ghosh, Avijit, Email: miduavijit@yahoo.com, and Ray, Debasis, Email: ray.debasis@gmail.com. 2015.
"Nonresonant elastic scattering of lowenergy photons by atomic sodium confined in quantum plasmas". United States.
doi:10.1063/1.4916060.
@article{osti_22408219,
title = {Nonresonant elastic scattering of lowenergy photons by atomic sodium confined in quantum plasmas},
author = {Ghosh, Avijit, Email: miduavijit@yahoo.com and Ray, Debasis, Email: ray.debasis@gmail.com},
abstractNote = {The nonresonant elastic scattering of lowenergy photons by the bound valence electron in the ground state 3s of atomic sodium confined in quantum plasmas is investigated theoretically. The incident photon energy is assumed to be much smaller than the 3s3p excitation energy. The alkali atom sodium is first formulated as an effective oneelectron problem in which the attractive interaction between the valence electron and the atomic ion core is simulated by a spherically symmetric model potential. The ShuklaEliasson oscillatory exponential cosine screenedCoulomb potential model is then used to mimic the effective twobody (valencecore) interaction within quantum plasmas. Nonrelativistic calculations performed within the electric dipole approximation indicate that the nonresonant elastic photon scattering crosssection undergoes a dramatic growth by several orders of magnitude as the quantum wave number increases. A qualitative explanation of this phenomenon is presented. In the absence of the oscillatory cosine screening term, a similar growth is observed at larger values of the quantum wave number. Our computed relevant atomic data are in very good agreement with the experimental as well as the previous theoretical data for the zeroscreening (free atom) case, and with the very limited, accurate theoretical results available for the case of exponential screenedCoulomb twobody interaction, without the cosine screening term.},
doi = {10.1063/1.4916060},
journal = {Physics of Plasmas},
number = 3,
volume = 22,
place = {United States},
year = 2015,
month = 3
}

Possibility of giant enhancement of lowfrequency nonresonant Rayleigh scattering by atomic systems within dense plasmas
In this paper, we demonstrate the possibility of electron densityinduced giant growth of nonresonant Rayleigh scattering of electromagnetic radiation (in the lowfrequency limit) by atomic systems within dense plasmas. Nonrelativistic quantum mechanical calculation is performed under electric dipole approximation, for elastic scattering of radiation by the ground states 1s of plasmaembedded hydrogenlike atomic ions treated within the framework of the ionsphere model. The results indicate giant enhancement of the nonresonant (photon frequency ω being much smaller than the lowest resonance frequency ω{sub 1s−2p}) Rayleigh crosssection by an order of magnitude, at (atomic systemspecific) high enough plasma electron densities under presentmore »