Lyman Series Wavelengths - measurement standard?

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SUMMARY

The currently accepted measurement standard for the Lyman series spectral lines includes wavelengths from NIST, which are 91.9342 nm, 92.0947 nm, 92.3148 nm, 92.6249 nm, 93.0751 nm, 93.7814 nm, 94.9742 nm, 97.2517 nm, 102.5728 nm, and 121.56701 nm. The alternative set from the Russian site presents slightly different values, raising questions about the accuracy and source of these measurements. The discrepancy in the Rydberg constant values, specifically 1.0967878E+07 used by the Russian site versus the CODATA value of 1.0973731569E+07, warrants further investigation. Additionally, the origin of the measured values—whether from solar spectra or terrestrial sources—needs clarification, particularly regarding the implications of gravitational redshift.

PREREQUISITES
  • Understanding of spectral line measurements
  • Familiarity with the Rydberg formula
  • Knowledge of CODATA constants
  • Basic concepts of gravitational redshift
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  • Research the latest CODATA values for fundamental constants
  • Examine the methodology for measuring spectral lines from both solar and terrestrial sources
  • Investigate the implications of gravitational redshift on spectral measurements
  • Explore the differences in Rydberg constant calculations and their impact on precision
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Physicists, spectroscopists, and researchers in atomic physics who are involved in spectral line measurements and the analysis of fundamental constants.

neilparker62
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Am just wondering what the currently accepted measurement standard is for the Lyman series spectral lines.

At NIST I find the following set of measured wavelengths (nano meters):

91.9342
92.0947
92.3148
92.6249
93.0751
93.7814
94.9742
97.2517
102.5728
121.56701

At http://www.trinitas.ru/rus/doc/0016/001b/00161313.htm I find another set of measured wavelengths:

91.93514
92.09631
92.31504
92.62257
93.07483
93.78035
94.97431
97.25368
102.57223
121.56701

1. Which set of data is the currently accepted measurement standard ?

2. Also the Russian site is using the value 1.0967878E+07 for the Rydberg constant and I would like to know where that comes from since it is neither the same as Codata 1.0973731569E+07 nor reduced mass corrected value of 1.0967758341E+07. The value they are using seems to calculate the second set of values to a very high level of precision without recourse to anything other than the standard Rydberg formula.

3. Finally are the measured values from sun spectra or from some or other terrestrial light source ? Because at some level of accuracy one would presumably have to start accounting for gravitational redshift of solar spectra.
 

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