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 `__ · :doc:`Catalogue ` · :doc:`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 SUPERSEDED\: the same measurements, with 'slight changes \.\.\.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 ~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "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 :doc:`review register ` for the checks and decisions.