Browsing by Author "M.L. Rustgi"

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Effect of hard core on the photodisintegration cross sections of H3
(1962) V.S. Mathur; S.N. Mukherjee; M.L. Rustgi
The electric-dipole bremsstrahlung weighted cross section (b) and the integrated cross section (int) for the photodisintegration of H3 are calculated using the hard-core wave functions of Kikuta, Morita, and Yamada. A comparison with already published calculations indicates that the introduction of the hard core increases both b and int for the H3 nucleus by about 100 and 8%, respectively. © 1962 The American Physical Society.
Erratum: Nuclear magnetic shielding constants and x-ray atomic scattering factors for two-, three-, and four-electron systems by means of analytic hartree-fock wavefunctions (The Journal of Chemical Physics (1963) 39 (2590))
(1966) M.L. Rustgi; P. Tiwaei
[No abstract available]
Isotope shift in axially asymmetric nuclei
(1961) M.L. Rustgi
The effect of axial asymmetry on isotope shift, as introduced in the theory of Davydov and Filippov, is investigated and is found to be non-negligible. An accurate experimental study of the isotope shift may therefore provide evidence in favor of or against Davydov-Filippov's theory for deformed nuclei. © 1961 The American Physical Society.
Maximtun ionization cross section of atoms
(1969) Prabhakar Tiwari; D.K. Rai; M.L. Rustgi
Various theoretical approaches for estimation of maximum ionization cross sections have been discussed and three new relations have been developed and used to evaluate maximum cross sections. Mann's calculations have been critically examined, and the present results have been compared with available experimental results.
Nuclear magnetic shielding constants and x-ray atomic scattering factors for two-, three-, and four-electron systems by means of analytic hartree-fock wavefunctions
(1963) M.L. Rustgi; P. Tlwari
Nuclear magnetic shielding constants and x-ray atomic scattering factors have been calculated for two-, three-, and four-electron systems using the best analytical self-consistent field functions of Roothaan, Sachs, and Weiss, and where possible, the reported values have been compared with the ones already published. It is pointed out that it may not be possible to extract any reliable information about the angular and radial correlations of electrons in the atoms and ions considered here from the scattering factors.
Octupole deformation in even-even medium mass nuclei
(1963) M.L. Rustgi; S.N. Mukherjee
The stability of octupole deformation for even-even medium mass nuclei with small spheroidal deformation has been studied in order to explain the existence of odd-parity excited states in some of them. The total single-particle energy is calculated by an exact diagonalization of the Nilsson Hamiltonian with octupole deformation, neglecting the residual two-particle interaction. Within this framework, it is found that these nuclei are stable against octupole deformation. © 1963 The American Physical Society.
Photodisintegration of helium
(1963) M.L. Rustgi; S.N. Mukherjee
The electric dipole bremsstrahlung-weighted cross section σb and integrated cross section σint for the photodisintegration of helium have been calculated using the modified Irving wave function. Good agreement has been obtained with the current experimental values: σb=2.4±0.15 mb and σint=95±7 MeV mb. The results have also been compared with the recent calculations of Goldhammer and Valk. © 1963 The American Physical Society.
Polarizabilities and shielding factors of Li, Li-, and boron
(1970) Prabhakar Tiwari; D.K. Rai; M.L. Rustgi
Dipole and quadrupole polarizabilities and shielding factors of lithium and lithium-negative ion have been evaluated using Sternheimer's procedure. Unusually large values for quadrupole polarizabilities of lithium-negative ion are reported. The dipole polarizability of boron is also calculated and compared with the other calculations. © 1970 The American Physical Society.
The insentivity of the γ (d, n)p cross sections to realistic potentials
(1967) S.N. Mukherjee; B.Barman Roy; M.L. Rustgi
Employing the Yale and Hamada-Johnston potentials the bremsstrahlung-weighted and integrated cross sections have been evaluated for the photodisintegration of the deuteron and the results are found to be quite insensitive to the details of these potentials. © 1967.