Resonant Compton Scattering of Photons by Helium Atoms in Lorentzian Astrophysical Plasmas

Kar, Sabyasachi; Wang, Yang; Ho, Y. K.; Jiang, Zishi

doi:10.1007/s00601-016-1148-3

Cited by 5 publications

(5 citation statements)

References 44 publications

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“…We employ the Lorentzian fitting technique to extract resonance parameters. With applicability of Lorentzian (kappa-distribution) astrophysical plasmas [1][2][3][4][5][6][7][8] and with recent progress of atomic process in kappa-distribution plasmas, [11][12][13][14][15][16][17][18][19][20] it is expected that our findings will contribute to further studies in positron-atom scattering phenomenon.…”

Section: Discussionmentioning

confidence: 71%

“…In astrophysical and space plasma environments, the velocity distributions of inner particles can be well-described by non-Maxwellian or Lorentzian distribution. The kappa distribution function which was first shown by Vasyliunas [9] can be described in the following form: [10][11][12][13][14][15][16][17][18][19][20] f κ (v) = n m 2πκE κ 3/2 Γ (κ + 1)…”

Section: Introductionmentioning

confidence: 99%

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Resonances for positron–helium and positron–lithium systems in kappa-distribution plasma

Jiang¹,

Gao²,

Kar³

et al. 2018

Chinese Phys. B

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S-wave resonances of positron-helium and positron-lithium systems in kappa-distribution plasmas are investigated using Hylleraas-type wave functions in the framework of the stabilization method. A model potential approach is used to represent the interactions between the outer electron, the positron and the core. The resonance parameters (position and width) of positron-helium and positron-lithium systems below the Ps(2s) threshold are reported as a function of screening parameter and spectral index of plasma.

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Section: Discussionmentioning

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Resonances for positron–helium and positron–lithium systems in kappa-distribution plasma

Jiang¹,

Gao²,

Kar³

et al. 2018

Chinese Phys. B

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“…Another aspect of this work involves the determination of the Compton profile (CP), which is associated with Compton scattering, an inelastic scattering process. It serves as a valuable spectroscopic tool for characterizing both individual particle behavior and collective modes [48][49][50][51][52][53]. It is also related to the electron momentum density, a quantity widely utilized in various chemical processes.…”

Section: Introductionmentioning

confidence: 99%

Information-theoretic measures and Compton profile of H atom under finite oscillator potential

Mondal,

Sadhukhan,

Saha

et al. 2024

J. Phys. B: At. Mol. Opt. Phys.

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Information-theoretic measures for $nl~(^2L)$ states of H atom (with $n=1-10$ and $l=0-2$, where $n$ and $l$ denote principal and angular momentum quantum numbers) have been investigated within a quantum dot by utilizing the Ritz variational principle, with the help of a Slater-type basis set. A well-established two-parameter (depth and width) model finite oscillator potential is used to simulate the dot environment. Variationally optimized position ($r$)-space wave function is utilized to determine the momentum ($p$)-space wave function, leading to the generation of $p$-space radial density distribution. We have explored the impact of cavity parameters on quantum information theoretic measures, such as Shannon ($S$) and Fisher information ($I$) entropy, in ground as well as excited states. The results of $S$ were also used to test the Bialynicki-Birula-Mycielski (BBM) inequality, related to the entropic uncertainty principle for the confined H atom. Some simple new fitting laws pertaining to $S$ and $I$ have been proposed. Furthermore, the $p$-space radial density is employed to derive the Compton profile of the confined H atom. Possible tunability of $S, I$ and Compton profiles with respect to the parameters are noted.

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“…Besides mass‐dependence on the polarizabilities of two‐electron negative ions, we have also studied the effect of SCP on the polarizability for the systems discussed above. The study of atomic structure and spectra under the influence of SCP is one of the interesting and hot topics of current research due to its importance in several areas of physics and chemistry . In the recent years, several studies have been performed to investigate the effect of SCP on the polarizability of atoms or ions .…”

Section: Introductionmentioning

confidence: 99%

“…The study of atomic structure and spectra under the influence of SCP is one of the interesting and hot topics of current research due to its importance in several areas of physics and chemistry. [55][56][57][58][59][60][61][62][63][64] In the recent years, several studies have been performed to investigate the effect of SCP on the polarizability of atoms or ions. [3][4][5][6][10][11][12][13]20,[65][66][67][68] The complete SCP in a general form can be written as [55,59] VðrÞ5…”

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confidence: 99%

Polarizability of negatively charged helium‐like ions interacting with Coulomb and screened Coulomb potentials

Kar

Wang

et al. 2017

Int J of Quantum Chemistry

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The dipole and quadrupole polarizabilities (both static and dynamic) of negatively charged helium‐like ions are investigated. The mass dependence of the polarizability is studied by changing the mass of the positively charged particle from one unit of electron mass to infinitely heavy. The calculations are carried out in the framework of the pseudostate summation method using exponential correlated wave functions having pseudorandomly generated nonlinear variational parameters. The dipole and quadrupole polarizabilities in terms of frequency and nuclear mass are reported for the first time. The effect of screened Coulomb potentials on the polarizabilities of D–, T–, 1H–,Pi–, Mu–, and Ps– are also presented.

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Resonant Compton Scattering of Photons by Helium Atoms in Lorentzian Astrophysical Plasmas

Cited by 5 publications

References 44 publications

Resonances for positron–helium and positron–lithium systems in kappa-distribution plasma

Resonances for positron–helium and positron–lithium systems in kappa-distribution plasma

Information-theoretic measures and Compton profile of H atom under finite oscillator potential

Polarizability of negatively charged helium‐like ions interacting with Coulomb and screened Coulomb potentials

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