smith_1975

P. L. Smith, W. H. Parkinson and M. C. E. Huber, “The refractive index of krypton for 168 nm <= lambda <= 288 nm”, Opt. Commun. 14, 374 (1975)

Source record · Catalogue · Review register

DOI: 10.1016/0030-4018(75)90339-9

Source kind: measurement

Recorded technique: Evacuated Mach-Zehnder interferometer (Banfield et al. 1973) with a water-jacketed absorption cell (water within 1 K of ambient, measured to +-0.2 K). Fringes counted photoelectrically at 288.2 nm while the cell was filled to about 5 Torr above ambient, then at constant pressure while the wavelength was scanned to 221.7 nm, photographed for 165-245 nm, and counted again at 221.7 nm while the cell was evacuated; counts at Si I and H2 emission lines on the H2 continuum, drift corrected. Pressure by Baratron differential and a calibrated mercury barometer (+-0.2 Torr). Airco research-grade krypton, 99.995 %, analysed twice (Table 2). pp. 374-376.

Materials in structured entries: Kr

Dataset quantities: refractivity

Contents: 4 datasets; 0 formulas.

Curation notes

The library’s DOI and title; page numbers are counted from 374 on the pdf.

SUPERSEDED: the same measurements, with ‘slight changes ... from an improved calculation of the drift correction’, are in smith_1976 (Phys. Rev. A 13, 1422, p. 1433 there), whose krypton values differ from these by up to 0.4e-6 (212.48 nm: 503.2 against 502.8). smith_1976/experiment_Kr is the one to fit; every dataset here is excluded or reproduced.

State: not stated in the paper; Table 3 is headed ‘(n - 1) [in 10^-6] for krypton’. The values agree with smith_1976’s (0 C, 760 Torr, real gas) to 0.4e-6 and with Leonard’s adjusted Kronjager and Koch values to 0.1 %, so they are recorded at 0 C and 1 atm, density unknown.

Uncertainty (p. 376, Table 1): the probable errors of the fringe count (+-0.06 %), pressure (0.03 %), length (0.02 %) and temperature (0.07 %) give ‘Total +-0.1%’; the abstract: ‘The probable error of each measurement is +-0.1%’. At least two measurements per wavelength; ‘the mean absolute difference between pairs of results was 0.1 x 10^-6 (0.02%)’. A gas sample collected during a run at 243.59 nm gave (479.0 +- 0.5)e-6 against the other results (479.2 +- 0.5)e-6 and (478.9 +- 0.5)e-6 (p. 376). Wavelengths are vacuum (‘lambda_vac’, Si I and H2 lines known to better than 0.01 %).

Conclusion (pp. 376-377): ‘On the average, our data are about 0.1% smaller than those of Kronjager and Koch as adjusted by Leonard’, and ‘about 3.8% smaller than those of Abjean et al.’, whose data ‘are incorrect’ (abjean_1971; withdrawn by its authors in bideau_mehu_1976). The three-term Sellmeier interpolation (‘calc.’) has no printed coefficients: no formula.

Reproductions elsewhere: bideau_mehu_1981/smith_1975_Kr and bideau_mehu_1976/smith_1975_Kr (values at the Brest wavelengths: bideau_mehu_1976’s 488.8 at 228.8 nm and 501.6 at 213.9 nm are this paper’s ‘calc.’ interpolation there).

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

Datasets

smith_1975/experiment_Kr

{
  "id": "experiment_Kr",
  "material": "Kr",
  "file": "Kr/smith_1975__experiment_Kr.csv",
  "table": "tbl_bb31b7ebfefd",
  "quantity": "refractivity",
  "scale": 1e-06,
  "abscissa_unit": "nm",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "excluded",
  "uncertainty": {
    "relative": 0.001,
    "level": "probable error"
  }
}

Table 3, ‘this work’ (27 points). Superseded by smith_1976/experiment_Kr: the same measurements with an improved drift correction.

smith_1975/interpolated_Kr

{
  "id": "interpolated_Kr",
  "material": "Kr",
  "file": "Kr/smith_1975__interpolated_Kr.csv",
  "table": "tbl_bb31b7ebfefd",
  "quantity": "refractivity",
  "scale": 1e-06,
  "abscissa_unit": "nm",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "excluded"
}

Table 3, ‘calc.’: the three-term Sellmeier interpolation of this work (probable error +-0.1e-6, p. 376), 168.46-298.06 nm (above 288.24 nm an extrapolation). Superseded by smith_1976/interpolated_Kr.

smith_1975/abjean_1971_Kr

{
  "id": "abjean_1971_Kr",
  "material": "Kr",
  "file": "Kr/smith_1975__abjean_1971_Kr.csv",
  "table": "tbl_bb31b7ebfefd",
  "quantity": "refractivity",
  "scale": 1e-06,
  "abscissa_unit": "nm",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "excluded",
  "reproduced_from": [
    "abjean_1971"
  ]
}

Table 3, ‘Abjean et al. [1] data’: abjean_1971’s Table 2 measured column (492.7 ... 570.7) at 253.7-180.7 nm; withdrawn by its authors.

smith_1975/kronjager_koch_Kr

{
  "id": "kronjager_koch_Kr",
  "material": "Kr",
  "file": "Kr/smith_1975__kronjager_koch_Kr.csv",
  "table": "tbl_bb31b7ebfefd",
  "quantity": "refractivity",
  "scale": 1e-06,
  "abscissa_unit": "nm",
  "wavelength_medium": "vacuum",
  "state": "1atm_0C",
  "density": "unknown",
  "use": "reproduced",
  "reproduced_from": [
    "leonard_1974",
    "W. Kronjager, Z. Physik 98, 17 (1935)",
    "J. Koch, Kgl. Fysiograf. Sallskap. Lund. Forh. 19, 15 (1949)"
  ]
}

Table 3, ‘Kronjager [2] and Koch [3]’ as adjusted by Leonard (footnote d), 298.06-202.55 nm; which value is whose is not said.

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.