brion_1984#
C. E. Brion and J. P. Thomson, “Compilation of dipole oscillator strengths (cross sections) for the photoabsorption, photoionization and ionic fragmentation of molecules”, J. Electron Spectrosc. Relat. Phenom. 33, 301 (1984)
Source record · Catalogue · Review register
DOI: 10.1016/0368-2048(84)80027-4
Source kind: compilation
Recorded technique: A compilation of the authors’ groups’ dipole (e,2e) and dipole (e,e+ion) coincidence measurements (fast-electron energy loss at zero angle, the equivalent of tuneable-energy photoelectron and photoionisation mass spectroscopy). The total photoabsorption df/dE comes from the zero-degree (e,e) energy-loss spectrum, made absolute by the Bethe-Born factor and Thomas-Reiche-Kuhn sum-rule normalisation, ‘without making any absolute measurements’ (p. 301); the partial photoionisation oscillator strengths partition it by the photoion branching ratios and the ionisation efficiency eta_i, often assumed 1 above 20 eV (pp. 301-302); the total photoionisation is the sum of the partials (p. 303). Resolution (FWHM) 0.5-1.0 eV for (e,e) photoabsorption, 1.5 eV for (e,2e), 0.5-1.0 eV for (e,e+ion) (p. 303).
Materials in structured entries: CH4, CO, CO2, H2, N2, N2O, O2, SF6
Dataset quantities: differential_oscillator_strength, photoionization_cross_section
Contents: 16 datasets; 0 formulas.
Curation notes#
Journal pages 301-331 = PDF pages 1-31 (page n of the PDF is p. 300 + n). Values per molecule; no density or state. Unit: df/dE in 10^-2 eV^-1 against photon energy (eV); ‘sigma(Mb) = 109.75 (df_0/dE)(eV)^-1’ (p. 303). Accuracy (p. 303): ‘generally considered to be <= 5 % (photoabsorption) and <= 10 % (photoionization)’, no confidence level; stored as relative 0.05 and 0.10, level not stated.
EVERY TABLE IS A REPRINT: each is headed by the journal reference of the original measurement (the tables are ‘the details of the individual experiments are to be found in the literature references shown at the head of each table’, p. 302). None of the originals is in the library, so these copies are ‘reproduced’ with the original’s citation (the head’s journal reference, with the authors from gallagher_1988’s record or from this paper’s reference list), and are the best copies available.
Extracted (the dipole (e,e+ion) tables of the curated species, which carry both totals): H2 (p. 318), CO (p. 319), N2 (p. 320), O2 (p. 321), CH4 (p. 326), N2O (p. 327), CO2 (p. 328), SF6 (p. 331): the total photoabsorption as differential_oscillator_strength (absorption_<gas>) and the total photoionisation as photoionization_cross_section (ionization_<gas>), the latter with the paper’s factor as its scale (printed x 1.0975 = Mb). The partial photoionisation channels (molecular and fragment ions, electronic states of the ion) are not extracted (no quantity; for later).
STRUCTURE (image checked, every cell of the eight tables agrees with the extraction): the title strips are separate one-cell tables; the SF6 strip is extracted as ‘SF_5’; the CH4 (e,e+ion) strip of p. 326 is missing from the extraction (the page shows ‘CH4 (e,e+ion) J. Phys. B 8 (1975) 3020-3033.’), and the CH4 strip the extraction has (p. 313) heads the CH4 (e,2e)-type table of that page; the p. 305 (N2 (e,2e), J. Electron Spectrosc. 8, 367 (1976)) and p. 315 (N2O (e,2e), Chem. Phys. 34, 141 (1978)) strips are also missing. ‘O_2^*’ in the O2 and CO2 headers is O2+ (a superscript plus). The SF6 table prints three absorption values without their hundreds digit (errata).
Not extracted: the (e,2e) tables (pp. 304-317). Their total photoabsorption columns reprint the (e,e) data: CO (p. 304) and N2 (p. 305) from J. Phys. B 9, 675 (1976) (the same values as the (e,e+ion) tables here), O2 (p. 306) and CH4 (p. 313, note a J. Phys. B 8 3007, printed ‘(1978)’ for 1975) likewise; CO2 (p. 314) and N2O (p. 315) instead print (e,e) data ‘normalised on photoabsorption at 35 eV’ to Lee et al. (J. Quant. Spectrosc. Radiat. Transfer 13, 1023 (1973)), a different normalisation (CO2 at 21.2 eV: 33.44 there against 32.50 at 21 eV here). Their total photoionisation columns (sums of (e,2e) partials) differ from the (e,e+ion) ones by up to a few per cent (CH4 at 15 eV: 36.80 against 36.79). NO, HF, HCl, HBr, H2O, NH3, COS and CS2 are not curated species.
Partial TRK sums (computed 2026-09-26, trapezoid over the printed points, df/dE in eV^-1): S(0) over the table’s range against the electron count N (valence N_v): H2 10-70 eV 1.967 (N = 2); CO 18-69 eV 6.35 and N2 18-69 eV 6.19 (N = 14, N_v = 10; the discrete region below 18 eV is not tabulated); O2 5-75 eV 8.90 (N = 16, N_v = 12); CH4 14-80 eV 6.52 (N = 10, N_v = 8; nothing below 14 eV); N2O 8-74 eV 12.72 and CO2 8-80 eV 12.88 (N = 22, N_v = 16); SF6 5-63 eV 30.03 with the errata (27.03 as printed; N = 70, N_v = 48). The tables stop far below the inner shells and (for most) the valence continuum’s tail, so these are consistent with the TRK normalisation of the full original spectra but cannot test it. Partial S(-2) (au) over the same ranges: H2 5.34 (5.43 total static), O2 10.54, N2O 19.05, CO2 17.34, CH4 9.89 (below 14 eV missing), SF6 28.5 as printed (1.73 au of it from the doubtful 6.0 eV point, see absorption_SF6).
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
brion_1984/absorption_H2#
{
"id": "absorption_H2",
"material": "H2",
"file": "H2/brion_1984__absorption_H2.csv",
"table": "tbl_55480943b731",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. Backx, G. R. Wight and M. J. Van der Wiel, J. Phys. B 9, 315 (1976) (the table head's 'J. Phys. B 9 (1976) 315-331'; authors from gallagher_1988, ref. 138)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 318, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 10.0-70.0 eV, 42 points (0.5 eV steps to 17.5 eV, 1 eV to 40 eV, then 50, 60, 70). Table note: ‘some data is also given for HD and D2; see also J. Phys. B 12 (1979) 1559-1576’ (not in this compilation). Partial S(0) 1.967 of 2, partial S(-2) 5.34 au (source notes). gallagher_1988 (Fig. 10) shows Backx’s points highest near threshold.
brion_1984/ionization_H2#
{
"id": "ionization_H2",
"material": "H2",
"file": "H2/brion_1984__ionization_H2.csv",
"table": "tbl_55480943b731",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. Backx, G. R. Wight and M. J. Van der Wiel, J. Phys. B 9, 315 (1976) (the table head's 'J. Phys. B 9 (1976) 315-331'; authors from gallagher_1988, ref. 138)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 318, ‘Total Photo-Ionization’ (the sum of the H2+ and H+ channels): df/dE printed in 10^-2 eV^-1 at 15.0-70.0 eV, 32 points; scale 1.0975 = the paper’s sigma(Mb) = 109.75 df/dE (eV^-1) x 10^-2 (p. 303). The ratio to the total photoabsorption is 0.93-1.00 above 20 eV.
brion_1984/absorption_CO#
{
"id": "absorption_CO",
"material": "CO",
"file": "CO/brion_1984__absorption_CO.csv",
"table": "tbl_72dab91fceaa",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"G. R. Wight, M. J. Van der Wiel and C. E. Brion, J. Phys. B 9, 675 (1976) (the table head's 'J. Phys. B 9 (1976) 675-689'; authors from gallagher_1988, ref. 256)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 319, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 18.0-69.0 eV in 1 eV steps, 52 points (the discrete region below 18 eV is not tabulated). The same values head the CO (e,2e) table (p. 304). This is the 1976 (e,e) spectrum, not the later Chan et al. (1993) one that olney_1997 uses; gallagher_1988 (Fig. 24) shows these points highest, above the photon data at 20-30 eV.
brion_1984/ionization_CO#
{
"id": "ionization_CO",
"material": "CO",
"file": "CO/brion_1984__ionization_CO.csv",
"table": "tbl_72dab91fceaa",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"G. R. Wight, M. J. Van der Wiel and C. E. Brion, J. Phys. B 9, 675 (1976) (the table head's 'J. Phys. B 9 (1976) 675-689'; authors from gallagher_1988, ref. 256)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 319, ‘Total Photo-Ionization’ (CO+, C+, O+, CO2+ summed): printed in 10^-2 eV^-1 at 18.0-58.0 eV, 41 points (the CO+ column continues to 60 eV without a total); scale 1.0975 to Mb (p. 303). Ratio to the total photoabsorption 0.93-1.09 above 20 eV.
brion_1984/absorption_N2#
{
"id": "absorption_N2",
"material": "N2",
"file": "N2/brion_1984__absorption_N2.csv",
"table": "tbl_a794d910da1a",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"G. R. Wight, M. J. Van der Wiel and C. E. Brion, J. Phys. B 9, 675 (1976) (the table head's 'J. Phys. B 9 (1976) 675-689'; authors from gallagher_1988, ref. 256)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 320, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 18.0-69.0 eV in 1 eV steps, 52 points. The same values head the N2 (e,2e) table (p. 305). The 1976 (e,e) spectrum, not Chan et al.’s 1993 one used by olney_1997.
brion_1984/ionization_N2#
{
"id": "ionization_N2",
"material": "N2",
"file": "N2/brion_1984__ionization_N2.csv",
"table": "tbl_a794d910da1a",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"G. R. Wight, M. J. Van der Wiel and C. E. Brion, J. Phys. B 9, 675 (1976) (the table head's 'J. Phys. B 9 (1976) 675-689'; authors from gallagher_1988, ref. 256)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 320, ‘Total Photo-Ionization’ (N2+ and N+ summed): printed in 10^-2 eV^-1 at 18.0-62.0 eV, 45 points (N2+ continues to 66 eV without a total); scale 1.0975 to Mb (p. 303). Ratio to the total photoabsorption 0.88-1.06 above 20 eV.
brion_1984/absorption_O2#
{
"id": "absorption_O2",
"material": "O2",
"file": "O2/brion_1984__absorption_O2.csv",
"table": "tbl_00a15c604fe1",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. E. Brion, K. H. Tan, M. J. Van der Wiel and Ph. E. van der Leeuw, J. Electron Spectrosc. Relat. Phenom. 17, 101 (1979) (the table head's reference; authors as olney_1997 ref. [18] prints them)"
],
"excluded_rows": {
"5.0": "0.92 at 5.0 eV (248 nm) is fifteen times the 6.0 eV value (0.06), below the Schumann-Runge bands (2000-1750 A, ditchburn_1954) where O2 absorbs far more weakly: about 1 Mb, not physical; a misprint or background of the energy-loss spectrum, the correction unknown. Kept as printed, excluded."
},
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 321, (e,e+ion) table, ‘Total * Photo-Absorption’ (note: ‘Absorption data extends to 300 eV’ in the original): df/dE (10^-2 eV^-1) at 5.0-75.0 eV in 1 eV steps, 71 points; the 1 eV resolution smears the Schumann-Runge bands and continuum into the 7-10 eV points. NOT INDEPENDENT of kumar_2011_supplement’s O2 dipole oscillator strength distribution, whose intervals j = 18-28 are taken from ‘Brion et al. (1979)’, the same measurement; olney_1997’s O2 spectrum (Table 1 refs. [12,18]) also combines Chan et al. 1993 with it.
brion_1984/ionization_O2#
{
"id": "ionization_O2",
"material": "O2",
"file": "O2/brion_1984__ionization_O2.csv",
"table": "tbl_00a15c604fe1",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. E. Brion, K. H. Tan, M. J. Van der Wiel and Ph. E. van der Leeuw, J. Electron Spectrosc. Relat. Phenom. 17, 101 (1979) (the table head's reference; authors as olney_1997 ref. [18] prints them)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 321, ‘Total Photo-Ionization’ (O2+ and O+ summed; headers extracted as ‘O_2^*’, ‘O^*’): printed in 10^-2 eV^-1 at 11.0-75.0 eV, 65 points; scale 1.0975 to Mb (p. 303). Ratio to the total photoabsorption 0.97-1.04 above 20 eV.
brion_1984/absorption_CH4#
{
"id": "absorption_CH4",
"material": "CH4",
"file": "CH4/brion_1984__absorption_CH4.csv",
"table": "tbl_689c845cc210",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. Backx, G. R. Wight, R. R. Tol and M. J. Van der Wiel, J. Phys. B 8, 3007 (1975) (the table's note a, 'from J. Phys. B 8 (1975) 3007-3019'; authors from this paper's ref. 6)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 326, (e,e+ion) table, ‘Total a Photo-Absorption’ (note a: from J. Phys. B 8 (1975) 3007): df/dE (10^-2 eV^-1) at 14.0-80.0 eV, 20 points (1 eV steps to 20 eV, 2 eV to 30, then 5 and 10 eV steps); nothing below 14 eV. The same values appear in the p. 313 table. gallagher_1988 (Fig. 60) shows Backx’s points increasingly above Samson’s photon data above about 24 eV, by tens of per cent at 30-70 eV.
brion_1984/ionization_CH4#
{
"id": "ionization_CH4",
"material": "CH4",
"file": "CH4/brion_1984__ionization_CH4.csv",
"table": "tbl_689c845cc210",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"C. Backx and M. J. Van der Wiel, J. Phys. B 8, 3020 (1975) (the page's head 'CH4 (e,e+ion) J. Phys. B 8 (1975) 3020-3033', missing from the extraction; authors from this paper's ref. 5)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 326, ‘Total Photo-Ionization’ (CH4+ ... C+ summed): printed in 10^-2 eV^-1 at 14.0-80.0 eV, 20 points; scale 1.0975 to Mb (p. 303). Exceeds the total photoabsorption at 16-18 eV (41.15 against 40.40) and 40 eV; ratio 0.86-1.07 above 20 eV. The (e,2e) table of p. 313 prints a slightly different total (36.80 against 36.79 at 15 eV).
brion_1984/absorption_N2O#
{
"id": "absorption_N2O",
"material": "N2O",
"file": "N2O/brion_1984__absorption_N2O.csv",
"table": "tbl_c5ae487e5662",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock, C. E. Brion and M. J. Van der Wiel, Chem. Phys. 45, 461 (1980) (the table head's 'Chem. Phys. 45 (1980) 461-478'; authors from gallagher_1988, ref. 195)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 327, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 8.0-74.0 eV, 63 points (1 eV steps to 66 eV, then 2 eV). Not the p. 315 (e,2e) table’s absorption column, which is normalised at 35 eV to Lee et al.’s photoabsorption.
brion_1984/ionization_N2O#
{
"id": "ionization_N2O",
"material": "N2O",
"file": "N2O/brion_1984__ionization_N2O.csv",
"table": "tbl_c5ae487e5662",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock, C. E. Brion and M. J. Van der Wiel, Chem. Phys. 45, 461 (1980) (the table head's 'Chem. Phys. 45 (1980) 461-478'; authors from gallagher_1988, ref. 195)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 327, ‘Total Photo-Ionization’ (N2O+, NO+, N2+, O+, N+ summed; the N2+ header extracts as ‘N_3^+’): printed in 10^-2 eV^-1 at 12.0-74.0 eV, 59 points; scale 1.0975 to Mb (p. 303). Ratio to the total photoabsorption 0.94-1.06 above 20 eV.
brion_1984/absorption_CO2#
{
"id": "absorption_CO2",
"material": "CO2",
"file": "CO2/brion_1984__absorption_CO2.csv",
"table": "tbl_f55f568f42e8",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock, C. E. Brion and M. J. Van der Wiel, Chem. Phys. 45, 461 (1980) (the table head's 'Chem. Phys. 45 (1980) 461-478'; authors from gallagher_1988, ref. 195)"
],
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 328, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 8.0-80.0 eV, 59 points (1 eV steps to 53 eV, then 2 eV from 56 eV; 54 and 55 eV not printed). Not the p. 314 (e,2e) table’s absorption column (normalised at 35 eV to Lee et al.).
brion_1984/ionization_CO2#
{
"id": "ionization_CO2",
"material": "CO2",
"file": "CO2/brion_1984__ionization_CO2.csv",
"table": "tbl_f55f568f42e8",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock, C. E. Brion and M. J. Van der Wiel, Chem. Phys. 45, 461 (1980) (the table head's 'Chem. Phys. 45 (1980) 461-478'; authors from gallagher_1988, ref. 195)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 328, ‘Total Photo-Ionization’ (CO2+, CO+, O+, C+, CO2++ summed; headers extracted with ‘*’ for ‘+’): printed in 10^-2 eV^-1 at 13.0-80.0 eV, 54 points; scale 1.0975 to Mb (p. 303). Ratio to the total photoabsorption 0.89-1.04 above 20 eV.
brion_1984/absorption_SF6#
{
"id": "absorption_SF6",
"material": "SF6",
"file": "SF6/brion_1984__absorption_SF6.csv",
"table": "tbl_643f8c4f78a2",
"quantity": "differential_oscillator_strength",
"unit": "1/eV",
"scale": 0.01,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock and M. J. Van der Wiel, J. Phys. B 12, 2153 (1979) (the table head's 'J. Phys. B 12 (1979) 2153-2169', extracted as 'SF_5'; authors from this paper's ref. 13)"
],
"excluded_rows": {
"6.0": "8.40 at 6.0 eV between 0.50 (5.0 eV) and 0.70 (7.0 eV), in the flat 0.5-0.8 floor that precedes SF6's first band (the rise begins at 10-11 eV in this table): not physical, probably a misprint (0.40?), the correction unknown. Kept as printed, excluded; it alone would add 1.7 au to S(-2)."
},
"uncertainty": {
"relative": 0.05,
"level": "not stated"
}
}
p. 331, (e,e+ion) table, ‘Total Photo-Absorption’: df/dE (10^-2 eV^-1) at 5.0-63.0 eV in 1 eV steps, 59 points. Three misprinted values (23.0, 24.0, 25.0 eV) are corrected by errata. The 5-9 eV values (0.50-0.80) are a floor below the first absorption band, probably background; kept. The ionisation note of the table: ‘see journal article for possible complications due to double dissociative ionization’ (and p. 302: such effects ‘have been found to be large for SF6’). gallagher_1988 (Fig. 95) shows a peak of about 150 Mb near 23 eV in these data.
brion_1984/ionization_SF6#
{
"id": "ionization_SF6",
"material": "SF6",
"file": "SF6/brion_1984__ionization_SF6.csv",
"table": "tbl_643f8c4f78a2",
"quantity": "photoionization_cross_section",
"unit": "Mb",
"scale": 1.0975,
"abscissa_unit": "eV",
"use": "reproduced",
"reproduced_from": [
"A. P. Hitchcock and M. J. Van der Wiel, J. Phys. B 12, 2153 (1979) (the table head's 'J. Phys. B 12 (1979) 2153-2169', extracted as 'SF_5'; authors from this paper's ref. 13)"
],
"uncertainty": {
"relative": 0.1,
"level": "not stated"
}
}
p. 331, ‘Total Photo-Ionization’ (SF5+ ... SF2++ summed): printed in 10^-2 eV^-1 at 16.0-63.0 eV, 48 points; scale 1.0975 to Mb (p. 303). ‘See journal article for possible complications due to double dissociative ionization’ (table note): the time-of-flight method sees only the fastest fragment (p. 302). Ratio to the (corrected) total photoabsorption 0.89-1.13 above 20 eV.
Formulas#
No formulas are recorded.
Corrections#
[
{
"dataset": "absorption_SF6",
"row": "23.0",
"column": "value",
"printed": "20.80",
"corrected": "120.80",
"reason": "The hundreds digit is missing from the printed value: the table's five-character column drops it (the photoionisation column beside it prints six characters). At 23.0 eV the total photoionisation is 118.58, and the absorption cannot be six times smaller than the ionisation it contains; with 120.80 the ratio is 0.98, as at the neighbouring energies (22 eV 0.96, 26 eV 0.97).",
"evidence": "Table image tbl_643f8c4f78a2.jpg (p. 331): the cell reads '20.80', right-aligned like its neighbours, beside '118.58' in the Total Photo-Ionization column; the absorption column's other values near the 23 eV shape resonance are 82.20 (22 eV) and 88.10 (26 eV). Only a leading 1 gives a physical ratio (a 2 would make the ionisation efficiency 0.54 above 20 eV, where the paper assumes about 1, p. 302). gallagher_1988's Fig. 95, as its record describes it, shows these data peaking at about 150 Mb near 23 eV; the corrected 24.0 eV value is 135.30 x 1.0975 = 148 Mb."
},
{
"dataset": "absorption_SF6",
"row": "24.0",
"column": "value",
"printed": "35.30",
"corrected": "135.30",
"reason": "As at 23.0 eV: the hundreds digit is missing. The total photoionisation at 24.0 eV is 132.86; with 135.30 the ratio is 0.98.",
"evidence": "Table image tbl_643f8c4f78a2.jpg (p. 331): '35.30' beside '132.86'; see the 23.0 eV erratum."
},
{
"dataset": "absorption_SF6",
"row": "25.0",
"column": "value",
"printed": "10.40",
"corrected": "110.40",
"reason": "As at 23.0 eV: the hundreds digit is missing. The total photoionisation at 25.0 eV is 106.92; with 110.40 the ratio is 0.97 (printed, 10.3).",
"evidence": "Table image tbl_643f8c4f78a2.jpg (p. 331): '10.40' beside '106.92'; see the 23.0 eV erratum."
}
]
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.