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Critical parameters and spherical confinement of H atom in screened Coulomb potential
Author(s) -
Roy Amlan K.
Publication year - 2016
Publication title -
international journal of quantum chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.484
H-Index - 105
eISSN - 1097-461X
pISSN - 0020-7608
DOI - 10.1002/qua.25108
Subject(s) - yukawa potential , eigenfunction , coulomb , eigenvalues and eigenvectors , exponential function , trigonometric functions , atom (system on chip) , dipole , physics , electric potential , atomic physics , quantum mechanics , mathematics , mathematical analysis , geometry , voltage , electron , computer science , embedded system
Critical parameters in three screened potentials, namely, Hulthén, Yukawa, and exponential cosine screened Coulomb potential are reported. Accurate estimates of these parameters are given for each of these potentials, for all states having n ≤ 10 . Comparison with literature results is made, wherever possible. Present values compare excellently with reference values; for higher n , ℓ , our results are slightly better. Some of these are presented for first time. Further, we investigate the spherical confinement of H atom embedded in a dense plasma modeled by an exponential cosine screened potential. Accurate energies along with their variation with respect to box size and screening parameter are calculated and compared with reference results in literature. Sample dipole polarizabilities are also provided in this case. The generalized pseudospectral method is used for accurate determination of eigenvalues and eigenfunctions for all calculations. © 2016 Wiley Periodicals, Inc.