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.

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.

Isotope shift and hyperfine structure in the atomic spectrum of tin

1973 ◽  
Vol 332 (1588) ◽  
pp. 129-138 ◽  
Keyword(s):  
Stable Isotopes ◽  
Hyperfine Structure ◽  
Nuclear Charge ◽  
Light Sources ◽  
Atomic Spectrum ◽  
Nuclear Charge Distribution ◽  
Fabry Perot ◽  
Self Consistent ◽  
Structure Constants ◽  
Good Agreement

Three lines in the atomic spectrum of tin, λ 3262 Å, λ 3283 Å and λ 6454Å have been studied in emission under high resolution with the use of light sources containing enriched isotopic samples. Results are reported for isotope shifts in these lines for the abundant stable isotopes ( A ≽ 116). Pressure-scanned Fabry–Perot etalons provided the necessary resolution; the spectrograms for λ 6454 Å were recorded and analysed by digital techniques, and for this line hyperfine structure constants required in the interpretation of the data were also evaluated. The results for the three lines are not in good agreement with earlier work, but are shown to be self-consistent by means of a King plot. Their interpretation in terms of the nuclear charge distribution is considered in the following paper.

Measurement of hyperfine structure constants, $g$ values and tensor polarizability of excited states of Sm I

1997 ◽  
Vol 39 (3) ◽  
pp. 209-216 ◽  
Author(s):  
T. Kobayashi ◽  
I. Endo ◽  
A. Fukumi ◽  
T. Horiguchi ◽  
Y. Ishida ◽  
...  
Keyword(s):  
Hyperfine Structure ◽  
Excited States ◽  
Tensor Polarizability ◽  
Structure Constants

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.

Zur Fein-und Hyperfeinstruktur von Lu I

1971 ◽  
Vol 26 (10) ◽  
pp. 1559-1562 ◽  
Author(s):  
L. H. Göbel
Keyword(s):  
Angular Momentum ◽  
Hyperfine Structure ◽  
Ground State ◽  
Branching Ratio ◽  
Oscillator Strengths ◽  
Fabry Perot ◽  
Structure Constants

Abstract By means of the levelcrossing method the hyperfine structure constants and the lifetime as well as the angular momentum of the term 29607.98 cm-1 of LuI were determined. This term can be assigned to the 6s 27p 2P3/2-state. The signs of the interaction constants were obtained by the investigation of the line 3376.5 Å from this state into the 5d6s22D3/2 ground state in a Fabry-Perot interferometer. Together with the measured branching ratio from the lifetime the oscillator strengths were found. The results are:J = 3/2; B/| A | = 0.4947 (4); τ = 0.512 (16) · 10-8 (1.24/gJ) s;A = 678.94 (2) gJ/1.24 MHz; f(3376.5 Å) = 0.382 (15);B = 335.9 (3) gJ/1.24 MHz; f(3620.3 Å) = 0.15 (4) · 10-2.

Sequential assignment of NMR spectra of peptides at natural isotopic abundance with Zero and Ultra-Low Field-TOCSY

2021 ◽  
Author(s):  
Alexey S. Kiryutin ◽  
Ivan V. Zhukov ◽  
Fabien Ferrage ◽  
G Bodenhausen ◽  
Alexandra V. Yurkovskaya ◽  
...  
Keyword(s):  
High Field ◽  
Nmr Spectra ◽  
Correlation Spectroscopy ◽  
Sequential Assignment ◽  
Isotopic Abundance ◽  
Natural Isotopic Abundance ◽  
Low Field ◽  
Total Correlation ◽  
High Resolution Nmr ◽  
Novel Method

A novel method dubbed ZULF-TOCSY results from the combination of Zero and Ultra-Low Field (ZULF) with high-field, high-resolution NMR, leading to a generalization of the concept of total correlation spectroscopy...

3D H2BC: A novel experiment for small-molecule and biomolecular NMR at natural isotopic abundance

2009 ◽  
Vol 200 (2) ◽  
pp. 340-343 ◽  
Author(s):  
Sebastian Meier ◽  
Andrew J. Benie ◽  
Jens Ø. Duus ◽  
Ole W. Sørensen
Keyword(s):  
Small Molecule ◽  
Isotopic Abundance ◽  
Biomolecular Nmr ◽  
Natural Isotopic Abundance
Sign in / Sign up

Export Citation Format

Share Document