Weighted oscillator strengths and lifetimes for the SiIV spectrum

The weighted oscillator strengths (gf) and the lifetimes for Si IV presented in this work were carried out in a multiconfiguration Hartree-Fock relativistic (HFR) approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure, in order to improve the adjustment to experimental energy levels. This method produces gf-values that are in better agreement with intensity observations and lifetime values that are closer to the experimental ones. In this work we present all the experimentally known electric dipole Si IV spectral lines. (C) 2001 Elsevier Science Ltd. All rights reserved.68663564

A theta-pinch as a spectroscopic light source

The aim of this work is to describe a theta-pinch for spectroscopic studies. This machine is different in some aspects from its equivalent for fusion studies. Here, in a single experiment, 1000 shots are used normally. The capacitor bank stores 14 kJ of electrical energy at 60 kV, but only 1 kJ is necessary to obtain an electron peak temperature of 150 eV, which is enough to produce a good emission spectrum in the VUV range of 300 to 2000 Angstrom. With this device it is possible to obtain intermediate ionization states of many elements (ionized six or seven times), Similarly to tokamaks, the theta-pinch spectrum contains spectral lines due to Forbidden transitions, where the Delta S = 0 rule for dipole electric transition is violated.31786687

Weighted oscillator strengths and lifetimes for the Si X spectrum

The weighted oscillator strengths (gf) and the lifetimes for Si X presented in this work were carried out in a multiconfiguration Hartree-Fock relativistic (IIFR) approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure, in order to improve the adjustment to experimental energy levels. This method produces gf-values that are in better agreement with intensity observations and lifetime values that are closer to the experimental ones. In this work we presented all the experimentally known electric dipole Si X spectral lines. (C) 1999 Elsevier Science Ltd. All rights reserved.64151

Weighted oscillator strengths and lifetimes for the S XIV spectrum

The weighted oscillator strengths gf and the lifetimes for S XIV presented in this work have been calculated in a multiconfigurational Hartree-Fock relativistic approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure in order to improve the adjustment to experimental energy levels. This method produces gf values that are in better agreement with observed line intensities and lifetime values closer to the experimentally determined ones. In this work we presented all the experimentally known electric dipole S XIV spectral lines.76344745

Weighted oscillator strengths and lifetimes for the ArIII spectrum

The weighted oscillator strengths (gf) and the lifetimes for Ar III presented in this work were carried out in a multiconfiguration Hartree-Fock relativistic (HFR) approach. In this calculation, the electrostatic parameters were optimized by a least-squares procedure in order to improve the adjustment to experimental energy levels. This method produces gf-values that are in better agreement with intensity observations and lifetimes values that are closer to the experimental ones. In this work we presented all the experimentally known electric dipole Ar III spectral lines. (C) 2001 Published by Elsevier Science Ltd.69217118

The internal and external electric fields for a resistive toroidal conductor carrying a steady poloidal current

We consider the case of a resistive toroidal conductor carrying a steady current in the poloidal direction. We obtain algebraic expressions for the electric potential, the electric field and the surface charges inside and outside the toroidal shell. We use toroidal coordinates, in which Laplace's equation is R-separable. We analyze the limiting case of a thin toroid, which can be compared with the solution for the ideal straight solenoid.78

A compilation of wavelengths and energy levels for the spectrum of neutral rubidium (Rb I)

We are presenting a complete list of wavelengths for all classified lines of RbI. The data are based mainly on the observations and analysis of this spectrum by many authors. The tabulated data include 615 observed lines in the spectral range 103-27,905 Angstrom, classified as transitions among 22 even-parity and 414 odd-parity levels. Vacuum wavelengths are given for all the lines, and wavelengths in air are also included for the region above 2000 A. We also present the results of the doppler-free two-photon absorption spectrum for the transition n(2)S <-- 5(2)S and n(2)D <-- 5(2)S of atomic rubidium. (C) 2002 Elsevier Science Ltd. All rights reserved.75555958

Atomic transitions for the doubly ionized argon spectrum, ArIII

We present new experimental atomic transition values for the atomic emission spectrum of doubly ionized argon, Ar III. In this work we studied 3s(2)3p(4) - 3s(2)3p(3)3d, 3s(2)3p(4) - 3s(2)3p(3)4s , 3s(2)3p(4) - 3s(2)3p(3)4d, 3s(2)3p(4) - 3s(2)3p(3)5s, 3s(2)3p(3)3d - 3s(2)3p(3)4p, and 3s(2)3p(3)4s - 3s(2)3p(3)4p transition arrays and 196 lines were identified as new atomic transitions between levels of these configurations. The experimental data were obtained from a capillary-discharge tube. The identifications are supported by multiconfiguration Hartree-Fock relativistic calculations.30238639

Vacuum ultraviolet spectrum of six-times ionized xenon, Xe VII

The theta-pinch spectrum of six-times ionized xenon, Xe VII, has been recorded in the vacuum ultraviolet region of 300-1300 Angstrom, and 27 new transitions have been identified as combinations between levels of the 5p2-5p5d and 5s5d-5p5d transition arrays. From these transitions, 11 new levels have been determined. The energy-level assignments have been interpreted when the theoretical energy-level values were fitted with a least-squares approach. Hartree-Fock calculations with relativistic corrections were used to predict energy levels and transitions. (C) 1997 Optical Society of America.14102459246