matsui_2003 =========== T\. Matsui, A\. S\.\-C\. Cheung, K\. W\.\-S\. Leung, K\. Yoshino, W\. H\. Parkinson, A\. P\. Thorne, J\. E\. Murray, K\. Ito and T\. Imajo, "High resolution absorption cross\-section measurements of the Schumann\-Runge bands of O2 by VUV Fourier transform spectroscopy", J\. Mol\. Spectrosc\. 219, 45 \(2003\) `Source record `__ · :doc:`Catalogue ` · :doc:`Review register ` DOI: `10\.1016/s0022\-2852\(03\)00009\-2 `__ **Source kind:** measurement **Recorded technique:** Vacuum\-ultraviolet Fourier\-transform spectroscopy \(the Imperial College spectrometer\) with synchrotron radiation \(Photon Factory beam line 12B, predisperser 2\.5 nm wide at 177\.5 and 180\.0 nm\), resolution 0\.06 or 0\.12 cm^\-1; a 7\.82 cm cell of O2 at 2\.00, 4\.00 and 10\.00 Torr, 295 K \(column densities 0\.51, 1\.02 and 2\.56e18 cm^\-2\), capacitance manometer; lines fitted with Voigt profiles \(GREMLIN\), about 650 lines of the \(12,0\)\-\(17,0\) bands, 175\-182\.5 nm \(pp\. 45\-47\)\. Line intensities from the 2\.00 Torr spectra only \(saturation at 4 and 10 Torr, p\. 54\)\. **Materials in structured entries:** O2 **Dataset quantities:** oscillator\_strength **Contents:** 6 datasets; 0 formulas. Curation notes -------------- Journal pages 45\-57 = PDF pages 1\-13\. O2 only, 295 K\. Only the band values are taken \(Table 5\); the line lists \(Tables 1a, 1b\: positions; Table 2\: term values; Tables 4a, 4b\: integrated line cross sections with branch totals\) and the molecular constants \(Table 3\) are not extracted\. Band oscillator strength \(Eq\. 1, p\. 55\)\: f\(v', v''\) = \(m c^2 / \(pi e^2\)\) \(1 / N\(v''\)\) integral sigma\(nu\) dnu over all rotational lines of the band, N\(v''\) the fractional Boltzmann population of the lower level, from the extended total cross\-sections of the principal branches \(extrapolated to N'' = 41 with a Boltzmann distribution\) and the observed totals of the satellite and forbidden branches\. Table 5 also gives the total \(observed\) and extended integrated cross\-sections in 10^\-17 cm^2 cm^\-1 \(not extracted\: no vocabulary quantity\)\. Check \(2026\-09\-25\)\: the extended values times 1/\(pi r\_e\) = 1\.12958e12 cm^\-1 give 2\.372, 2\.621, 2\.700, 2\.666, 2\.395, 2\.124e\-5, the printed f to their rounding \(N\(0\) = 1 to 0\.1 % at 295 K\)\. Accuracy \(p\. 55\)\: pressure \(\+\-0\.02 Torr\), temperature \(295 \+\- 2 K\) and path \(7\.82 \+\- 0\.01 cm\) give 'a random error of less than 2 %'; the noise is \+\-3e\-20 cm^2 \(3\-4 % for the strong lines of 5\-6e\-19 cm^2 cm^\-1, 10 % at 2\.5e\-19, 17 % at 1\.0e\-19\); 'total errors on the integrated cross\-sections are estimated to be less than 5 %'\. The band values are line\-by\-line integrals at a resolution comparable to the Doppler widths, free of the blending of neighbouring bands that the authors think inflated the earlier low\-resolution values \(p\. 56\)\. The abstract's f values \(2\.38, 2\.62, 2\.70, 2\.66, 2\.40, 2\.12e\-5\) are Table 5's\. The five comparison columns are reproduced\: LBC \(Lewis et al\. 1986, 1\.4 cm^\-1 resolution without pressure broadening, 'near the present results, but still a little larger'\), YFEP \(Yoshino et al\. 1983, 0\.40 cm^\-1, \(12,0\) only, agreeing\), GGMBL \(Gies et al\. 1981\), HCMK \(Huebner et al\. 1975, electron energy loss, 'much smaller' than theirs\) and Bethke \(1959, bethke\_1959\)\. The Bethke column copies bethke\_1959's Table I except \(17,0\), printed 2\.95 for Bethke's 2\.94 \(erratum\)\. This work is 15\-28 % below Bethke \(\(12,0\) \-15 %, \(17,0\) \-28 %\)\. Band positions\: the rows are indexed by v'\. The band origins T\(v\) of Table 3 \(cm^\-1, relative to the hypothetical F2 N = J = 0 level of X\(0\); calibration uncertainty 0\.03 cm^\-1\) are 55783\.011 \(v' = 12\), 56083\.695, 56338\.380, 56548\.168, 56716\.53 and 56848\.56 \(v' = 17\), about 179\.3\-175\.9 nm \(tbl\_60e4f321647c, image checked; not extracted\)\. **Recorded bibliographic identity status:** VALIDATED. This concerns identification of the source; it does not establish the scientific correctness of its contents. Datasets -------- matsui\_2003/present ~~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "present", "material": "O2", "file": "O2/matsui_2003__present.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "primary", "uncertainty": { "relative": 0.05, "level": "bound" } } Table 5 'Present'\: band oscillator strengths of the Schumann\-Runge \(v', 0\) bands, v' = 12\-17 \(index v'\), in 1e\-5, at 295 K\. Less than 5 % \(stated as a bound on the integrated cross\-sections\)\. matsui\_2003/lbc ~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "lbc", "material": "O2", "file": "O2/matsui_2003__lbc.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "reproduced", "reproduced_from": [ "B. R. Lewis, L. Berzins, J. H. Carver, J. Quant. Spectrosc. Radiat. Transfer 36, 209 (1986)" ] } Table 5 'LBC' \(note c\), v' = 12\-16 \(none for 17\), in 1e\-5\: Lewis et al\.'s band oscillator strengths, reproduced\. matsui\_2003/yfep ~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "yfep", "material": "O2", "file": "O2/matsui_2003__yfep.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "reproduced", "reproduced_from": [ "K. Yoshino, D. E. Freeman, J. R. Esmond, W. H. Parkinson, Planet. Space Sci. 31, 339 (1983)" ] } Table 5 'YFEP' \(note d\), \(12,0\) only, in 1e\-5\: Yoshino et al\.'s value from line\-by\-line cross sections at 0\.40 cm^\-1, reproduced\. Merged with the LBC column in the library cells \(structural fix in the script\)\. matsui\_2003/ggmbl ~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "ggmbl", "material": "O2", "file": "O2/matsui_2003__ggmbl.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "reproduced", "reproduced_from": [ "H. P. Gies, S. T. Gibson, D. G. McCoy, A. J. Blake, B. R. Lewis, J. Quant. Spectrosc. Radiat. Transfer 26, 469 (1981)" ] } Table 5 'GGMBL' \(note e\), v' = 12\-17, in 1e\-5\: Gies et al\.'s band oscillator strengths, reproduced\. matsui\_2003/hcmk ~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "hcmk", "material": "O2", "file": "O2/matsui_2003__hcmk.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "reproduced", "reproduced_from": [ "R. H. Huebner, R. J. Celotta, S. R. Mielczarek, C. E. Kuyatt, J. Chem. Phys. 63, 241 (1975)" ] } Table 5 'HCMK' \(note f\), v' = 12\-17, in 1e\-5\: Huebner et al\.'s electron\-energy\-loss band oscillator strengths, reproduced \(the highest of the set\)\. matsui\_2003/bethke ~~~~~~~~~~~~~~~~~~~ .. code-block:: text { "id": "bethke", "material": "O2", "file": "O2/matsui_2003__bethke.csv", "table": "tbl_0c3259b06159", "quantity": "oscillator_strength", "scale": 1e-05, "abscissa": "label", "use": "reproduced", "reproduced_from": [ "bethke_1959" ] } Table 5 'Bethke' \(note g\), v' = 12\-17, in 1e\-5\: bethke\_1959's Table I, reproduced; \(17,0\) printed 2\.95 for Bethke's 2\.94 \(erratum\)\. Formulas -------- No formulas are recorded. Corrections ----------- .. code-block:: text [ { "dataset": "bethke", "row": "(17,0)", "column": "value", "printed": "2.95", "corrected": "2.94", "reason": "The reproduction of Bethke's (17,0) band oscillator strength reads 2.95e-5; Bethke's Table I prints 2.94e-5, and his K_0 = 699 cm^-2 atm^-1 with his Eq. (2), 4.203e-8 K_0, gives 2.938e-5. The other five reproduced values equal Bethke's.", "evidence": "Table 5 image (tbl_0c3259b06159.jpg) prints 2.95; bethke_1959 Table I image (tbl_172bb90e7da2.jpg) prints 2.94; checked 2026-09-25." } ] 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.