Double-Λhypernuclei in the Skyrme-Hartree-Fock approach and nuclear core polarization

1998 ◽  
Vol 58 (6) ◽  
pp. 3351-3358 ◽  
Author(s):  
D. E. Lanskoy
Keyword(s):  
Core Polarization ◽  
Hartree Fock ◽  
Nuclear Core

scholarly journals New Transition and Energy Levels of Three-Times Ionized Krypton (Kr IV)

Atoms ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 48
Author(s):  
M. Raineri ◽  
M. Gallardo ◽  
J. Reyna Almandos ◽  
A. G. Trigueiros ◽  
C. J. B. Pagan
Keyword(s):  
Transition Probabilities ◽  
Energy Levels ◽  
Pulsed Discharge ◽  
Core Polarization ◽  
Polarization Effects ◽  
Hartree Fock ◽  
Theta Pinch ◽  
New Energy ◽  
First Time

A capillary pulsed-discharge and a theta-pinch were used to record Kr spectra in the region of 330–4800 Å. A set of 168 transitions of these spectra were classified for the first time. We extended the analysis to twenty-five new energy levels belonging to 3s23p24d, 3s23p25d even configurations. We calculated weighted transition probabilities (gA) for all of the experimentally observed lines and lifetimes for new energy levels using a relativistic Hartree–Fock method, including core-polarization effects.

Nuclear Core Polarization Effect on Beta Decay

1964 ◽  
Vol 133 (3B) ◽  
pp. B549-B555 ◽  
Author(s):  
Jun-Ichi Fujita ◽  
Saburo Fujii ◽  
Kiyomi Ikeda
Keyword(s):  
Beta Decay ◽  
Polarization Effect ◽  
Core Polarization ◽  
Nuclear Core

Monopole core polarization in a Hartree-Fock basis

1974 ◽  
Vol 49 (1) ◽  
pp. 23-28 ◽  
Author(s):  
P.J. Ellis ◽  
E. Osnes
Keyword(s):  
Core Polarization ◽  
Hartree Fock

Z-dependence of correlation effects and f values in the sodium iso-electronic sequence

1976 ◽  
Vol 54 (14) ◽  
pp. 1465-1481 ◽  
Author(s):  
Charlotte Froese Fischer
Keyword(s):  
Theoretical Study ◽  
Ionization Potentials ◽  
Initial Increase ◽  
Correlation Effects ◽  
Core Polarization ◽  
Hartree Fock ◽  
Analytic Expressions ◽  
Beam Foil

An accurate theoretical study of ionization potentials and f values in the sodium iso-electronic sequence has been performed using a frozen core, multi-configuration Hartree-Fock procedure.The Z-dependence of core-polarization and its effect on the transition integral are investigated. The initial increase in both these quantities as Z increases is explained in terms of a relative collapse in the size of the atom. Analytic expressions are derived for 3s–3p, 3s–4p, 3p–4s, and 4s–4p transition integrals.Core-polarization has reduced the f values for the 3s–3p transitions somewhat, but still leaves a discrepancy of up to 25% between theory and recent beam–foil results.

scholarly journals New Energy Levels and Transitions of 5s25p2 (6d+7s) Configurations in Xe IV

Atoms ◽  
2019 ◽  
Vol 7 (4) ◽  
pp. 108
Author(s):  
Jorge Reyna Almandos ◽  
Mónica Raineri ◽  
Cesar J. B. Pagan ◽  
Mario Gallardo
Keyword(s):  
Light Source ◽  
Energy Levels ◽  
Least Square ◽  
Pulsed Discharge ◽  
Core Polarization ◽  
Polarization Effects ◽  
Hartree Fock ◽  
New Energy ◽  
First Time ◽  
Least Square Procedure

Three-times ionized xenon Xe IV spectrum in the 1070–6400 Å region was analyzed using a pulsed discharge light source. A set of 163 transitions was classified for the first time, and 36 new energy levels belonging to the 5s25p26d and 5s25p27s even configurations were determined. The relativistic Hartree–Fock method, including core-polarization effects, were used. In these calculations, the electrostatic parameters were optimized by a least-square procedure in order to improve the adjustment to experimental energy levels. We also present a calculation based on a relativistic multiconfigurational Dirac–Fock approach.

Beam-foil measurements of lifetimes of energy levels belonging to Sn III and Sn IV

1987 ◽  
Vol 65 (1) ◽  
pp. 7-12 ◽  
Author(s):  
E. H. Pinnington ◽  
J. A. Kernahan ◽  
W. Ansbacher
Keyword(s):  
Decay Curve ◽  
Energy Levels ◽  
Resonance Transition ◽  
Isoelectronic Sequence ◽  
Core Polarization ◽  
Hartree Fock ◽  
Intensity Decay ◽  
Polarization Calculation ◽  
Beam Foil ◽  
Good Agreement

Beam-foil intensity decay curves for transitions in the wavelength range 750–5250 Å are used to derive the lifetimes of the 6s1S, 5p1P, 6p1P, 5d1D, 6d1D, 5p21D, 4f1F, 6s3S, 6p3p, 5p23p, 5d3D, 6d3D, and 4f3F levels of Sn III, and of the 6s2S, 5p2P, 6p2P, 5d2D, 6d2D, 4d95 s22D, and 4f2F levels of Sn IV. The arbitrarily normalized decay-curve analyses are used for most levels. Good agreement is found between experiment and a recent (relativistic Hartree–Fock + core-polarization) calculation for the resonance transition in low-Z members of the Cd 1 isoelectronic sequence, but the experimental f values are found to lie systematically about 20% above the theoretical trend obtained from a similar calculation for the Ag I sequence. Configuration interaction is found to produce very different lifetimes for the two 4d95s22D levels of Sn IV, and the energy of the J = 3/2 level is determined to be 177 060 ± 50 cm−1.

Sign in / Sign up

Export Citation Format

Share Document