sabbagh_1977#
J. Sabbagh and N. Sadeghi, “Experimental transition probabilities of some Xe(I) lines”, J. Quant. Spectrosc. Radiat. Transfer 17, 297-301 (1977)
Source record · Catalogue · Review register
DOI: 10.1016/0022-4073(77)90108-X
Source kind: measurement
Recorded technique: Absorption of a 132Xe probe lamp (0.5 Torr 132Xe in 4.5 Torr He, RF excited, 1 mm bore) by the metastable 6s[3/2]2 and resonant 6s[3/2]1 atoms in the afterglow of a pulsed discharge in 0.2 Torr isotopic 132Xe (cell 38 mm by 300 mm, current below 10 mA), read on a 0.6 m monochromator with photomultipliers (3500-11000 Angstrom) and a multichannel analyser (5 us resolution). Ratios of the absorption rates of two lines from the same lower level (each below 5 %, Doppler profiles, Eqs. 1-2) give ratios of f, and with the Ladenburg formula (Eq. 3) of A; absolute values by normalising to the reference lines 8819 Angstrom (6p[5/2]3-6s[3/2]2, A = (30 +- 0.5) x 10^6 s-1) and 8280 Angstrom (6p[1/2]0-6s[3/2]1, (34 +- 2.5) x 10^6 s-1), the means of the literature values of Table 1, not measured here.
Materials in structured entries: Xe
Dataset quantities: transition_probability
Contents: 3 datasets; 0 formulas.
Curation notes#
J. Quant. Spectrosc. Radiat. Transfer 17(3), 297-301 (1977) = PDF pages 1-5 (journal page = PDF page + 296). Identity checked on the first page (PDF p. 1: journal, volume 17, pp. 297-301, Pergamon 1977, title, authors, Grenoble) on 2026-10-09. Table 2 (p. 300, tbl_a841626f3146) and Table 1 (p. 298, tbl_730574616f21) checked cell by cell against the table images.
TAKEN (transition_probability, TC-1011; extraction script tools/extract/ sabbagh_1977.py): Table 2, column ‘Present work’, all 25 rows, in three datasets: the 19 lines to the metastable 6s[3/2]2 measured against 8819 Angstrom (A_6s2_Xe, primary), the 4 lines to the resonant 6s[3/2]1 measured against 8280 Angstrom (A_6s1_Xe, primary), and the two reference lines (A_reference_Xe, check: their values are the means of Table 1’s literature values, ‘we have arrived at mean value of ...’, p. 298, not measurements of this paper). Rows are the transitions in the paper’s Racah notation, x the printed air wavelength. The library cell ‘6p[1/2]_6-6s[3/2]_1’ is the image’s 6p[1/2]0-6s[3/2]1 (the script labels it so; the cell is kept in printed). Uncertainties as printed, per row, ‘include, besides uncertainties in the transition probabilities of the reference lines 8819 and 8280 Angstrom (see Table 1), the uncertainties in our absorption-ratio measurements’ (p. 301), level not stated: each line’s value carries its reference line’s scale (1.7 % for 8819, 7.4 % for 8280) in common with the others of its group.
NOT TAKEN: the ratio A(7642 Angstrom, 6p’[1/2]1-6s’[1/2]0) / A(8206 Angstrom, 6p’[3/2]1-6s’[1/2]0) = 1.11 +- 0.13 (p. 301; theory 1.734, Chen and Garstang, and 1.594, Aymar-Fehrenbach), a ratio no quantity holds; Table 1’s literature values and Table 2’s comparison columns (Chen and Garstang; Aymar-Fehrenbach, intermediate and jl coupling; Malakhov; Karimov and Klimkin), reproduced and superseded by NIST; Figs. 1-2 (absorption against time).
LEVELS. The paper uses Racah (jl) notation, 6p[5/2]3 = 5p5(2P*3/2)6p 2[5/2], J = 3 in NIST’s notation; the primed levels have the 2P*1/2 core. Wavelengths are in air (8819 Angstrom = NIST 882.18 nm vacuum, 881.941 nm air; every row’s wavelength matches NIST’s air wavelength of the named transition to within 0.4 Angstrom, 0.05 Angstrom for the rows printed to 0.1 Angstrom, which fixes the mapping). Every row, upper level -> NIST (src/optmat/data/external/nist_asd/Xe_I_levels.tsv): 6p[1/2]1, 6p[5/2]2, 6p[5/2]3, 6p[3/2]1, 6p[3/2]2, 6p[1/2]0 = 5p5.(2P*<3/2>).6p 2[K] J; 6p’[3/2]1, 6p’[3/2]2, 6p’[1/2]1 = 5p5.(2P*<1/2>).6p 2[K] J; 7p[1/2]1, 7p[5/2]2, 7p[5/2]3, 7p[3/2]2, 8p[5/2]2, 8p[5/2]3, 8p[3/2]2, 9p[5/2]3, 9p[3/2]2 = 5p5.(2P*<3/2>).np 2[K] J; 4f[3/2]2, 4f[5/2]3, 5f[5/2]3 = 5p5.(2P*<3/2>).nf 2[K] J; lower levels 6s[3/2]2 and 6s[3/2]1 = 5p5.(2P*<3/2>).6s 2[3/2]* J = 2 and 1 (K and J as in the label).
FINDING (NIST, src/optmat/data/external/nist_asd/Xe_I_lines_nir.tsv, TC-983). Of the 20 lines to 6s[3/2]2, 16 have NIST A values equal to this paper’s (to NIST’s printed digits; NIST tp_ref T3269), so NIST evidently adopts this paper: 8819 (3.00e7, A+), 9800 (3.11e7, B+), 9045 (1.24e7), 8409 (3.06e6), 8232 (2.86e7), 4691 (2.8e5), 4524.7 (4.6e5), 4501 (1.46e6), 3974.4 (1.4e5), 3967.5 (5.3e5), 3951 (5.6e5), 3693.5 (3.1e5), 3686 (4.5e5), 4203.7 (1.1e5), 4193.5 (2.20e5), 3796.3 (1.6e5). The four 7p lines differ (NIST T8608): 4792.6, 0.15 against NIST 0.12 (x 1.25); 4697, 0.57 against 0.736 (x 0.77); 4671, 2.84 against 2.49 (x 1.14); 4624, 2.18 against 2.42 (x 0.90). The five lines to 6s[3/2]1 are all 0.904-0.944 times NIST’s (8280: 34 against 36.9; 10838.3: 1.70 against 1.8; 9923.2: 12.0 against 13.0; 9162.6: 21.7 against 24; 8952.2: 7.50 against 8.1; NIST tp_ref ‘T3269n, T6714’): NIST’s values are this paper’s times 36.9/34 = 1.085, to NIST’s rounding, i.e. renormalised to a reference A of 3.69e7 s-1 for 8280 Angstrom instead of the paper’s 34e6. The ratio A(7642)/A(8206) = 1.11 +- 0.13 against NIST’s 2.1e7/2.0e7 = 1.05.
FINDING (bruce_1990). Sabbagh and Sadeghi state that the 6p[1/2]0 level decays practically only by 8280 Angstrom (p. 298), so A(8280) = 1/tau(6p[1/2]0). Bruce et al.’s radiative lifetime 26.8 +- 0.8 ns gives 3.73e7 s-1, 10 % above the adopted 34 +- 2.5 x 10^6 s-1 and consistent with NIST’s renormalised 3.69e7.
FINDING (gornik_1981). Gornik et al.’s Table I gives ‘Experimental f values (Ref. 19) 6s|3/2|1 -> 6p’ of 0.12, 0.15 and 0.30 for 6p[1/2]0, 6p[3/2]2 and 6p[5/2]2, Ref. 19 being this paper. This paper prints no f values; its A values of the lines to 6s[3/2]1, 34, 7.50 and 12.0 x 10^6 s-1 at 8280, 8952.2 and 9923.2 Angstrom, give by its own Eq. (3) (absorption f from the lower level, g_u/g_l = 1/3, 5/3, 5/3) f = 0.1165, 0.1502 and 0.2953: Gornik et al.’s values are these, rounded. NIST’s absorption f of the same lines are 0.127 (B), 0.163 (C+) and 0.321 (B+), 8-9 % higher (the renormalisation above). In Gornik et al.’s single-path estimate the product f(1S0 - 6s[3/2]1) f(6s[3/2]1 - 6p) enters; with their 0.28 (matthias_1977) it is 0.0336, 0.0420 and 0.0840, and with NIST’s 0.265 and the NIST values above 0.0337, 0.0432 and 0.0851: the two differences cancel to within 0.2, 2.8 and 1.3 %.
The paper quotes ‘the radiative lifetime of the level 6s[3/2]1 is 3.8 nsec’ (p. 299, its Ref. 12, Anderson 1965, whose value is 3.79 +- 0.12 ns in matthias_1977’s Table 2).
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
sabbagh_1977/A_6s2_Xe#
{
"id": "A_6s2_Xe",
"material": "Xe",
"file": "Xe/sabbagh_1977__A_6s2_Xe.csv",
"table": "tbl_a841626f3146",
"quantity": "transition_probability",
"unit": "1/s",
"scale": 1000000.0,
"abscissa_unit": "angstrom",
"wavelength_medium": "standard_air",
"use": "primary",
"parameters": {
"notation": "racah",
"normalisation": "A(8819 Angstrom, 6p[5/2]3-6s[3/2]2) = 30e6 s-1 (+- 0.5e6), the mean of Table 1's literature values",
"method": "absorption by 6s[3/2]2 atoms in a 132Xe afterglow, ratios of absorption rates of lines sharing the lower level"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table 2 (p. 300), ‘Present work’: the 19 measured lines from 6p, 6p’, 7p, 8p, 9p, 4f and 5f to the metastable 6s[3/2]2, 3686-9800 Angstrom (air), relative absorption rates normalised to A(8819) (the blue and violet lines through 4671 Angstrom). 16 equal NIST’s A to its printed digits; the four 7p lines differ (record notes).
sabbagh_1977/A_6s1_Xe#
{
"id": "A_6s1_Xe",
"material": "Xe",
"file": "Xe/sabbagh_1977__A_6s1_Xe.csv",
"table": "tbl_a841626f3146",
"quantity": "transition_probability",
"unit": "1/s",
"scale": 1000000.0,
"abscissa_unit": "angstrom",
"wavelength_medium": "standard_air",
"use": "primary",
"parameters": {
"notation": "racah",
"normalisation": "A(8280 Angstrom, 6p[1/2]0-6s[3/2]1) = 34e6 s-1 (+- 2.5e6), the mean of Table 1's literature values",
"method": "absorption by 6s[3/2]1 atoms (populated from 6s[3/2]2 by collisions) in a 132Xe afterglow, ratios of absorption rates of lines sharing the lower level"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table 2 (p. 300), ‘Present work’: the 4 measured lines from 6p to the resonant 6s[3/2]1, 8952.2-10838.3 Angstrom (air), normalised to A(8280). NIST’s A are these times 1.085 (= 36.9/34, a different reference A for 8280; record notes). gornik_1981’s f values 0.15 and 0.30 are the 8952.2 and 9923.2 rows converted by Eq. (3) (script check).
sabbagh_1977/A_reference_Xe#
{
"id": "A_reference_Xe",
"material": "Xe",
"file": "Xe/sabbagh_1977__A_reference_Xe.csv",
"table": "tbl_a841626f3146",
"quantity": "transition_probability",
"unit": "1/s",
"scale": 1000000.0,
"abscissa_unit": "angstrom",
"wavelength_medium": "standard_air",
"use": "check",
"parameters": {
"notation": "racah",
"normalisation": "the adopted references themselves (means of Table 1)",
"method": "mean of the literature values of Table 1 (Chen and Garstang; Allen et al.; Aymar-Fehrenbach a, b; and for 8280 also Malakhov, Verolainen et al., Karimov and Klimkin)"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table 2 (p. 300), the reference lines 8819 Angstrom (6p[5/2]3-6s[3/2]2, 30 +- 0.5) and 8280 Angstrom (6p[1/2]0-6s[3/2]1, 34 +- 2.5): the means of Table 1’s theoretical and experimental literature values (p. 298), adopted, not measured here (equal to Table 1’s ‘Mean values’, script check). A check: NIST gives 3.00e7 (A+) and 3.69e7 (B); bruce_1990’s lifetime of 6p[1/2]0, whose only decay is 8280 Angstrom, gives 3.73e7.
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.