Untersuchung der Hyperfeinstruktur des 5s25d2D3/2-und 5s26d2D3/2-Terms im In I-Spektrum durch Resonanzstreuung von Licht im äußeren Magnetfeld / Hyper fine Structure Investigation of the 5s25d2D3/2- and 5s26d2Ds3/2-States of the ln I-Spectrum by Resonance Scattering of Light in an External Magnetic Field

1969 ◽  
Vol 24 (6) ◽  
pp. 903-908 ◽  
Author(s):  
M. Brieger ◽  
H. Bucka ◽  
A. Reichelt ◽  
P. Zimmermann
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Hyperfine Structure ◽  
Resonance Scattering ◽  
Resonance Fluorescence ◽  
Structure Investigation ◽  
Level Crossing ◽  
Structure Splitting ◽  
Structure Constants ◽  
Hyper Fine Structure

Using an Indium atomic beam as absorber the resonance fluorescence of the transitions 5d2D3/2 - 5p2P1/2 (λ = 3039 Å) and 6d2D3/2-5p2P 1/2 (λ=2560 Å) was measured as a function of an external magnetic field. In both states two signals were observed at magnetic fields, where three level crossings occur. The observed line shape is discussed for the case of overlapping level crossing components with regard to radiation width and hyperfine structure splitting. The experimental results can be described by the following values for the lifetime τ and the hyperfine structure constants A and B : 5d2D3/2: | A|=(64.5±1.0) Mc/sec·gJ/0.8; B/A = - 0.59±0.17; τ = ( 7.0± 0.4) · 10-9 sec · 0.8/gJ ;6d2D3/2: | A | =(72.1 ±0.3) Mc/sec·gJ/0.8 ; B/A = - 0.47 ±0.05; τ = (25.5±1 ) ·10-9 sec-0.8/gJ . The values and the sign of the hyperfine structure constants indicate interconfiguration mixing.

Level-crossing-Experimente in angeregten Termen des Lu I zur Untersuchung der Hyperfeinstruktur von 175 Lu / Hyperfine Structure Investigations of Excited States of Lu I by Means of the Level-crossing Method

1970 ◽  
Vol 25 (5) ◽  
pp. 611-620 ◽  
Author(s):  
L. H. Göbel
Keyword(s):  
Hyperfine Structure ◽  
Excited States ◽  
Electronic States ◽  
Resonance Scattering ◽  
Isotopic Abundance ◽  
Level Crossing ◽  
Natural Isotopic Abundance ◽  
Fabry Perot ◽  
Structure Constants ◽  
Structure Investigations

The magnetic dipol and the electric quadrupol interaction constants in the excited electronic states 5d6s6p (1D) 2D3/2 and 5d6s6p (1D) 2F5/2 of 175Lu I in natural isotopic abundance were investigated. The measurement was performed by resonance scattering of light with wavelengths λ = 4518.57 Å and λ = 3567.84 Å on a lutetium atomic beam. The following hyperfine structure constants were obtained:B/A{(1D) 2D3/2} = +0.34704(80) ; A{(1D) 2D3/2} =-1313.34(50) gJ/0.80 MHz; B{(1D) 2D3/2} =- 455.8(1.2) gJ/0.80 MHz; B/A{(1D) 2F5/2} = +9.7883(37) ; A{(1D) 2F5/2} =+ 351.864(56) gJ MHz; B{(1D) 2F5/2} = + 3444.2 (1.9) gJ MHz.The signs of the interaction constants were determined by examinations of these lines in a Fabry- Perot-interferometer. The lifetimes of the investigated states were found as follows:τ{(1D) 2D3/2} = (4.9 ± 0.1) · 10-8 s; τ{(1D) 2F5/2) = (1.2 ± 0.1) · 10-8 s.From these the oscillatorstrengths were deduced:ƒ(3567.8 Å) = (1.7 + 0.2) · 10-1; ƒ(3841.2 Å) = (5.6 + 0.8) · 10-2;ƒ(4518.6 Å) = (6.3 ± 0.1) · 10-2; ƒ(4967.5 Å) < 3 · 10-4.

Level-Crossing-Untersuchung des 6p 2P3/2-Terms im Au I-Spektrum durch Resonanz­streuung von Licht im elektrischen und magnetischen Feld zur Bestimmung der Hyperfeinstrukturtermordnung / Stark Effect Investigation of the 6p 2P3/2-State in Au I -Spectrum in Order to Determine the Signs of the Hyperfine Structure Constants

1971 ◽  
Vol 26 (4) ◽  
pp. 668-671 ◽  
Author(s):  
D. Einfeld ◽  
J. Ney ◽  
J. Wilken
Keyword(s):  
Magnetic Field ◽  
Hyperfine Structure ◽  
Stark Effect ◽  
Stark Shift ◽  
Positive Sign ◽  
Matrix Elements ◽  
Level Crossing ◽  
Electric And Magnetic Fields ◽  
Structure Constants ◽  
Coulomb Approximation

Level crossing technique, applying parallel electric and magnetic fields, has been used to determine the signs of the hyperfine structure constants A and B as well as the magnitude of the Stark-constant β . From the Stark-shift of the signal at 45 Oe in the wing of the Hanle-effect and of the level-crossing near 140 Oe to higher magnetic field strengths the ratios A/β > 0 and B/ß > 0 could be determined. An estimation of β by calculating the electric dipole matrix elements with Coulomb approximation yields a positive sign. Both signals and their shift with electric field then can be explained with the following results:A = + 14.0 (5) Mc/sec; 5=+327.6 (1.6) Mc/sec and β= +5.7(3) (kc/sec) (kV/cm)-2.

scholarly journals Sum rules for an atomic hyperfine structure in a magnetic field

2006 ◽  
Vol 84 (9) ◽  
pp. 801-811
Author(s):  
Savely G Karshenboim
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Hyperfine Structure ◽  
Uniform Magnetic Field ◽  
Sum Rules ◽  
Magnetic Moments ◽  
Energy Levels ◽  
Linear Combinations ◽  
Nuclear Magnetic Moments ◽  
The Magnetic Field

The sum rules for the energy levels of a hyperfine multiplet in a constant uniform magnetic field are presented. It is found that for any value of the electron angular moment and the nuclear spin there are certain linear combinations of energy levels that do not depend on the magnetic field and can be used to determine the unperturbed hyperfine-structure separation in the presence of a perturbing magnetic field. It is also demonstrated that there are other linear combinations that are linear with the external magnetic field and hence can be used to determine bound values of the electron and nuclear magnetic moments. The accuracy of the approximation within which the result is valid is also discussed.PACS Nos.: 32.10.Fn, 32.60.+i1

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