huber_1974#

M. C. E. Huber and G. Tondello, J. Opt. Soc. Am. 64, 390 (1974)

Source record · Catalogue · Review register

Source kind: measurement

Recorded technique: Wavelength shifts of about 30 emission lines (argon ringing discharge) in a windowless 3 m normal-incidence spectrograph filled with helium near 700 Torr and evacuated in turn, measured against first-order standards; more than 70 measurements of some 30 lines between 919 and 1910 A.

Materials in structured entries: He

Dataset quantities: refractivity

Contents: 2 datasets; 0 formulas.

Curation notes#

Table I lists values read from the best-fit curve through the measurements, not the individual measurements (which are shown only in Fig. 1). Pressure (about 700 Torr, +-0.03 %) and temperature (about 290 K, +-0.07 %) were measured and the data ‘reduced to normal pressure and temperature (NPT)’; the paper does not say how, so the density convention is unknown (for helium the real and ideal densities at 0 degrees C differ by 5e-4, far below the 3 % uncertainty). The standards’ wavelengths in helium were computed from Mansfield & Peck’s dispersion formula (valid down to about 250 nm).

Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets#

huber_1974/experiment#

{
  "id": "experiment",
  "material": "He",
  "file": "He/huber_1974__experiment.csv",
  "table": "tbl_6b16f76840f9",
  "quantity": "refractivity",
  "scale": 1e-05,
  "abscissa_unit": "angstrom",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "primary",
  "uncertainty": {
    "relative": 0.03,
    "level": "probable error"
  }
}

Smoothed best-fit values at 92-190 nm; ‘probable error in the best-fit curve smaller than +-3 %’ (p. 391).

huber_1974/victor_theory#

{
  "id": "victor_theory",
  "material": "He",
  "file": "He/huber_1974__victor_theory.csv",
  "table": "tbl_6b16f76840f9",
  "quantity": "refractivity",
  "scale": 1e-05,
  "abscissa_unit": "angstrom",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "reproduced",
  "reproduced_from": [
    "G. A. Victor, A. Dalgarno and A. J. Taylor, J. Phys. B 1, 13 (1968); G. A. Victor (private communication)"
  ]
}

The ‘theoretical’ column of Table I; the theory is ‘expected to be accurate to about +-0.5 %’ (p. 390).

Formulas#

No formulas are recorded.

Corrections#

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the review register for the checks and decisions.