Isotope shift and hyperfine structure in the spectrum of tellurium

1961 ◽  
Vol 265 (1320) ◽  
pp. 39-45 ◽  
Keyword(s):  
Stable Isotopes ◽  
Hyperfine Structure ◽  
Isotope Shift ◽  
Magnetic Moments ◽  
Reference Line ◽  
Nuclear Deformation ◽  
Nuclear Magnetic Moments ◽  
Fabry Perot ◽  
Limits Of Error ◽  
Hyperfine Structures

With the use of enriched samples of the stable isotopes of tellurium, the isotope shifts in the spark line 4049 A were studied. Fabry-Perot fringes due to this line were measured against a mercury reference line; also the hyperline structures of the odd isotopes were measured. The shifts in the even isotopes are com pared with those in adjacent elements and discussed in term s of nuclear deformation. The odd-even staggering was found to be extremely large in tellurium . The ratio of the widths of the hyperfine structures of the isotopes 123 and 125 agrees, within the experimental limits of error of about 1 %, with the ratio of the nuclear magnetic moments.

scholarly journals Hyperfine structure in the arc spectrum of bromine

1940 ◽  
Vol 175 (962) ◽  
pp. 366-382 ◽  
Keyword(s):  
Hyperfine Structure ◽  
Time Use ◽  
Graphical Method ◽  
Focal Length ◽  
Magnetic Moments ◽  
Nuclear Magnetic Moments ◽  
Fabry Perot ◽  
Infra Red ◽  
Hyperfine Structures ◽  
Term Analysis

In an earlier work Tolansky (1932) reported measurements for the hyperfine structures of 18 lines of the arc spectrum of bromine. Although resolution was incomplete in every line, it was possible to prove that both the bromine isotopes 79 and 81 have the same nuclear spin, 3/2, and have practically identical nuclear magnetic moments. In carrying out the hyperfine structure term analysis at that time, use was made of the interesting graphical method proposed by Fisher and Goudsmit (1931) and thus approximate hyperfine structure interval factors could be derived. At the time this work was done the existence of deviations from the interval rule was not suspected. Any such deviations destroy the validity of the Fisher-Goudsmit method of analysis. The frequent occurrence of nuclear electrical quadrupole moment leads one to suspect that there may be deviations from the interval rule in many spectra; hence we have undertaken a new and more complete examination of the hyperfine structures of the lines of Br I. The measurements reported here are more extensive and more accurate than those previously given. We have measured the structures of 76 lines extending from the infra-red at 8700 A down to 4390 A. All the principal lines in this region have been measured and, with very few exceptions, the structures have been completely accounted for. The results obtained here are much more accurate than those given earlier for the following reasons: (1) The modified source is much more intense. (2) It is cooled, giving sharper lines. (3) In place of the single Fabry-Perot previously available (with one thickness of silvering) we have used various silvered Fabry-Perot interferometers, similar interferometers coated with aluminium, and a high-quality quartz Lummer plate. (4) The camera focal length used now is 125 cm., that of the earlier instrument being only 50 cm. (5) Much more rapid plates are now available, particularly in the infra-red region.

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.

scholarly journals Hyperfine-Structure Separations, Nuclear Magnetic Moments, and Hyperfine-Structure Anomalies of Gold-198 and Gold-199

1967 ◽  
Vol 158 (4) ◽  
pp. 1078-1084 ◽  
Author(s):  
Paul A. Vanden Bout ◽  
Vernon J. Ehlers ◽  
William A. Nierenberg ◽  
Howard A. Shugart
Keyword(s):  
Hyperfine Structure ◽  
Magnetic Moments ◽  
Nuclear Magnetic Moments ◽  
Nuclear Magnetic

scholarly journals Hyperfine structure and nuclear magnetic moments of the praseodymium isotopes135,136,137Pr

2019 ◽  
Vol 240 (1) ◽  
Author(s):  
Nadja Frömmgen ◽  
Wilfried Nörtershäuser ◽  
Mark L. Bissell ◽  
Klaus Blaum ◽  
Christopher Geppert ◽  
...  
Keyword(s):  
Hyperfine Structure ◽  
Magnetic Moments ◽  
Nuclear Magnetic Moments ◽  
Nuclear Magnetic

scholarly journals The hyperfine structure and zeeman effect of the resonance lines of silver

1937 ◽  
Vol 158 (894) ◽  
pp. 372-383 ◽  
Keyword(s):  
Magnetic Field ◽  
Hyperfine Structure ◽  
Magnetic Moments ◽  
Wave Length ◽  
Zeeman Effect ◽  
Fused Silica ◽  
Resolving Power ◽  
Nuclear Spins ◽  
Fabry Perot ◽  
Quartz Rock

In the work described below, the hyperfine structure of the resonance lines of silver was investigated by the method of absorption in an atomic beam. The intensities of the observed components were measured, and the structure in a magnetic field was observed; from the results the nuclear spins and magnetic moments of both of the isotopes of silver were determined. Experimental 1— The Spectrograph and Interferometer The high resolving power instrument used was a Fabry-Pérot interferometer combined with a 1½-m. spectrograph, fitted with a Cornu quartz prism and quartz rock salt achromatic objectives. The étalon plates were plane to about 1/100 of a wave-length and were coated by evaporation with aluminium. The resolving power of the étalon was about 1/10 of an order for light of wave-length 3100 A; the plates and separating pieces were made of fused silica. The instrument has been described before.

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