liu_2009#
J. Liu, E. J. Salumbides, U. Hollenstein, J. C. J. Koelemeij, K. S. E. Eikema, W. Ubachs and F. Merkt, “Determination of the ionization and dissociation energies of the hydrogen molecule”, J. Chem. Phys. 130, 174306 (2009)
Source record · Catalogue · Review register
DOI: 10.1063/1.3120443
Source kind: measurement
Recorded technique: The ionisation energy of ortho-H2 as a sum of intervals (Fig. 1, Table II): X (v = 0, N = 1) -> EF 1Sigma_g+ (v = 0, N = 1), from Hannemann et al. 2006 (their Ref. 5); EF (0, 1) -> the 54p1_1(0) Rydberg state, measured here; and the 54p1_1(0) binding energy relative to the centre of gravity of the X+ (v+ = 0, N+ = 1) hyperfine structure, from Osterwalder et al. 2004 (Ref. 6) and Karr et al. 2008 (Ref. 25). The measurement: a skimmed pulsed supersonic H2 beam (2 bar stagnation), two-step excitation, a nonresonant two-photon step at 202 nm (pulsed dye laser, ~0.4 cm^-1 bandwidth, exciting all Doppler components) and a 397 nm step (second harmonic of a cw-seeded pulsed Ti:Sa amplifier, ~20 MHz bandwidth, delayed by 50 ns), with co- and counterpropagating 397 nm beams to cancel the first-order Doppler shift; delayed pulsed-field ionisation; calibration against Doppler-free I2 lines (comb-measured positions) and an etalon; the amplifier’s frequency shift measured by heterodyne (pp. 2-4). The para-H2 (conventional) value adds the X (0, 1) - X (0, 0) interval (Jennings et al. 1984, Ref. 8) and subtracts the X+ (0, 1) - X+ (0, 0) interval (Korobov, Refs. 9-11) (p. 6).
Materials in structured entries: H2
Dataset quantities: ionization_energy
Contents: 20 datasets; 0 formulas.
Curation notes#
PDF pages 1-9 (page 1 is the publisher’s cover sheet; PDF page 2 = 174306-1; pages cited are PDF pages). Identity checked on the first page (PDF p. 2). The library flags unmapped glyphs on every page (parentheses rendered as other characters): every number taken was read on the table images (Tables II and III) or on the rendered page (the equations under Table II, p. 6).
NOMENCLATURE: in H2 the para levels have even N, so E_i(H2) = E_i(para-H2) = X+ 2Sigma_g+ (v+ = 0, N+ = 0) - X 1Sigma_g+ (v = 0, N = 0) is the conventional (rotationless) ionisation energy; E_i(ortho-H2) = X+ (v+ = 0, N+ = 1, centre of gravity of the hyperfine structure) - X (v = 0, N = 1) (Table II; p. 5: ‘This value corresponds to the center of gravity of the hyperfine structure components of the N+ = 1 level of H2+’). The hyperfine splittings of X (0, 1) (< 500 kHz) and EF (0, 1) are neglected (p. 5).
EXTRACTED: - ie_ortho_H2 (inline; p. 6, the equation under Table II): E_i(ortho-H2) = (2) + (3) - (4) + (5) + (6) = 124 357.237 97(36) cm^-1. Table II’s intervals reproduce it to 1e-5 cm^-1 (the sum with (4) taken as the mean of its three hyperfine components, 4.791 89, is 124 357.237 979; the paper does not say how it averaged). ‘The overall uncertainty ... is determined as quadrature summation of the uncertainties of all energy level intervals’ (p. 5): sqrt(0.18^2 + 0.29^2 + 0.10^2) = 0.36 (1e-3 cm^-1) reproduces the (36). - ie_para_H2 (Table III, ‘This work’ row, tbl_c65377ced290; also abstract p. 2, text p. 6 and p. 7): E_i(H2) = E_i(para-H2) = (1) + E_i(ortho-H2) - (7) = 124 417.491 13(37) cm^-1 (the table’s year column prints 2008). The intervals give 124 417.491 144, 1.4e-5 cm^-1 above the printed value (well inside the uncertainty); the quadrature sum with (1)’s 0.10 gives 0.37. In eV (not printed; hc = 1.239841984e-4 eV cm): ortho 15.4183325, para 15.4258029 eV. - Table III (p. 8, tbl_c65377ced290, image checked): E_i(H2) as determined 1969-2002, reproduced, one dataset per row, with the references as the paper’s list prints them (p. 9). Theoretical values are printed without uncertainties. The 1993 rows citing ‘revised in 41’ are shiner_1993’s two H2 values (identical); the 1993 theory row (Ref. 40) is the Kolos & Rychlewski number shiner_1993 prints.
UNCERTAINTIES: the EF (0, 1) -> 54p1_1(0) interval is 25 209.997 56 +- (0.000 22)statistical +- (0.000 07)systematic cm^-1 (p. 5), ‘by adding the statistical and systematic errors’ 25 209.997 56(29); the statistical part is one standard deviation (p. 5: ‘the number in parentheses represents one standard deviation in the unit of the last digit’, of the mean of 16 pairs of measurements on 4 days, 2 x 12 604.998 80(10) cm^-1 fundamental). Error budget (Table I, p. 5, tbl_db58936e3055; MHz on the fundamental, x 2 on the UV): statistical, line centres of I2 +-0.36 x 2 and H2 +-3.0 x 2, ring-laser nonlinearity < +-1.1 x 2, residual Doppler < +-0.32 x 2, sum in quadrature +-6.5; systematic, FSR +-0.012 x 2, I2 reference lines < +-0.1 x 2, Ti:Sa amplifier shift (-4.76 +- 0.60) x 2, doubling crystal < +-0.35, ac Stark (-1.27 +- 0.64) x 2, dc Stark (+0.77 +- 0.39) x 2, pressure < +0.10 +- 0.05; sum -10.4 +- 2.0 MHz. The confidence level of the totals is not named.
COMPARISON: holsch_2019’s ortho-H2 value 124 357.238 003(11) cm^-1 is 3.3e-5 cm^-1 above this paper’s 124 357.237 97(36) (0.1 sigma of this paper’s uncertainty). Hölsch et al. (their Ref. 19) describe their result as a 30-fold improvement over this ‘2009 result’.
NOT EXTRACTED (notes only; no quantity): - Table II (p. 6, tbl_335e888b87cd; cm^-1): (1) X (0, 1) - X (0, 0) 118.486 84(10) [8]; (2) EF (0, 1) - X (0, 1) 99 109.731 39(18) [5]; (3) 54p1_1 (S = 0, centre) - EF (0, 1) 25 209.997 56(29) [this work]; (4) 54p1_1 (S = 0), F = 1, 0, 2 - 51d1_1 (G+ = 1/2), F = 0: 4.791 80, 4.791 91, 4.791 96 [6]; (5) X+ (0, 1, G+ = 1/2), F+ = 1/2 - 51d1_1 (G+ = 1/2), F = 0: 42.270 539(10) [6]; (6) X+ (0, 1, centre) - X+ (0, 1, G+ = 1/2), F+ = 1/2: 0.030 379 61 [25]; (7) X+ (0, 1, centre) - X+ (0, 0): 58.233 675 1(1) [9-11]. The 54p1_1(0) binding energy -(4) + (5) + (6) is 37.509 03 (the text, p. 2, quotes 37.509 02(2) from Ref. 6). The library’s CSV of this table lost the parentheses (‘118.486 8410-’); its OCR alternative and the image agree with the values above. - The dissociation energy (Eqs. (12)-(14), p. 7): D0(H2) = 36 118.069 62(37) cm^-1 (para, N = 0), a ‘hybrid experimental-theoretical determination’ (abstract), limited entirely by E_i(H2). Against the theory of Wolniewicz 1995 (36 118.069) and the experiment of Zhang et al. 2004 (36 118.062(10)) (p. 7). Recalculated inputs (CODATA 2006 constants): E_i(H) = 109 678.771 742 6(10) cm^-1 (Eq. (9), the hyperfineless 1 2S1/2 ground state; Eqs. (6)-(8): Dirac -109 679.043 564 75(73), recoil -0.000 794 340 7, Lamb shift 0.272 616 53(67)); E_i(H2+) = 131 058.121 975(49) cm^-1 (Eq. (10), Korobov’s formulae, uncertainty from neglected higher-order terms); D0(H2+) = 21 379.350 232(49) cm^-1 (Eq. (11); Moss 21 379.3501(1)). These are calculations (H is not a curated material; H2+’s ionisation energy is a theoretical value in a measurement record), so they stay in notes. - The earlier values quoted in the introduction (p. 2): E_i(H2)exp = 124 417.476(12) (de Lange et al. 2002, Table III’s 2002 row), D0(H2)exp = 36 118.062(10) (Zhang et al. 2004), and theory 124 417.491 and 36 118.069 (Wolniewicz 1995, Table III’s 1995 row). - Figs. 2-4 (the field-ionisation spectra, the calibration, the distribution of the measurements) and Figs. 5-6 (the potential diagram; E_i(H2) against year): figures, not digitised.
Recorded bibliographic identity status: VALIDATED_WITH_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.
Datasets#
liu_2009/ie_ortho_H2#
{
"id": "ie_ortho_H2",
"material": "H2",
"table": "text",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "primary",
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 1), centre of gravity of the hyperfine structure",
"initial_state": "X 1Sigma_g+ (v = 0, N = 1), ortho-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
1 inline points in the source record.
p. 6 (174306-5), the equation printed under Table II: E_i(ortho-H2) = (2) + (3) - (4) + (5) + (6) = 124 357.237 97(36) cm^-1, from X (v = 0, N = 1) to the centre of gravity of the hyperfine structure of X+ (v+ = 0, N+ = 1). Quadrature sum of the intervals’ uncertainties; level not named (record notes). Superseded in precision by holsch_2019/ie_ortho_H2 (124 357.238 003(11)).
liu_2009/ie_para_H2#
{
"id": "ie_para_H2",
"material": "H2",
"file": "H2/liu_2009__ie_para_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "primary",
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, ‘This work’ row (year printed 2008), p. 8; also the abstract (p. 2) and the equation under Table II (p. 6): E_i(H2) = E_i(para-H2) = (1) + E_i(ortho-H2) - (7) = 124 417.491 13(37) cm^-1, X (v = 0, N = 0) -> X+ (v+ = 0, N+ = 0): the conventional ionisation energy. ‘The most precise and accurate experimental result of this quantity’ (p. 8). Quadrature sum; level not named (record notes).
liu_2009/herzberg_1969_expt_H2#
{
"id": "herzberg_1969_expt_H2",
"material": "H2",
"file": "H2/liu_2009__herzberg_1969_expt_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"G. Herzberg, Phys. Rev. Lett. 23, 1081 (1969)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1969, Expt., Ref. 33.
liu_2009/herzberg_1969_theory_H2#
{
"id": "herzberg_1969_theory_H2",
"material": "H2",
"file": "H2/liu_2009__herzberg_1969_theory_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"G. Herzberg, Phys. Rev. Lett. 23, 1081 (1969)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
}
}
Table III, 1969, Theor., Ref. 33. Theoretical, printed without uncertainty. The theoretical value of the same reference (Ref. 33 only is printed).
liu_2009/herzberg_1972_H2#
{
"id": "herzberg_1972_H2",
"material": "H2",
"file": "H2/liu_2009__herzberg_1972_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"G. Herzberg and Ch. Jungen, J. Mol. Spectrosc. 41, 425 (1972)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1972, Expt., Ref. 24.
liu_2009/eyler_1986_H2#
{
"id": "eyler_1986_H2",
"material": "H2",
"file": "H2/liu_2009__eyler_1986_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"E. E. Eyler, R. C. Short and F. M. Pipkin, Phys. Rev. Lett. 56, 2602 (1986)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1986, Expt., Ref. 34.
liu_2009/glab_1987_H2#
{
"id": "glab_1987_H2",
"material": "H2",
"file": "H2/liu_2009__glab_1987_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"W. L. Glab and J. P. Hessler, Phys. Rev. A 35, 2102 (1987)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1987, Expt., Ref. 35.
liu_2009/eyler_1987_ref34_H2#
{
"id": "eyler_1987_ref34_H2",
"material": "H2",
"file": "H2/liu_2009__eyler_1987_ref34_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"E. E. Eyler, R. C. Short and F. M. Pipkin, Phys. Rev. Lett. 56, 2602 (1986)",
"E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig and E. Pollack, Phys. Rev. A 36, 3486 (1987)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1987, Expt., Ref. 34, revised in 36.
liu_2009/eyler_1987_ref35_H2#
{
"id": "eyler_1987_ref35_H2",
"material": "H2",
"file": "H2/liu_2009__eyler_1987_ref35_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"W. L. Glab and J. P. Hessler, Phys. Rev. A 35, 2102 (1987)",
"E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig and E. Pollack, Phys. Rev. A 36, 3486 (1987)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1987, Expt., Ref. 35, revised in 36.
liu_2009/mccormack_1989_H2#
{
"id": "mccormack_1989_H2",
"material": "H2",
"file": "H2/liu_2009__mccormack_1989_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"E. McCormack, J. M. Gilligan, C. Cornaggia and E. E. Eyler, Phys. Rev. A 39, 2260 (1989)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1989, Expt., Ref. 37.
liu_2009/jungen_1990_H2#
{
"id": "jungen_1990_H2",
"material": "H2",
"file": "H2/liu_2009__jungen_1990_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"Ch. Jungen, I. Dabrowski, G. Herzberg and M. Vervloet, J. Chem. Phys. 93, 2289 (1990)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1990, Expt., Ref. 38.
liu_2009/gilligan_1992_H2#
{
"id": "gilligan_1992_H2",
"material": "H2",
"file": "H2/liu_2009__gilligan_1992_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"J. M. Gilligan and E. E. Eyler, Phys. Rev. A 46, 3676 (1992)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1992, Expt., Ref. 39.
liu_2009/kolos_1993_H2#
{
"id": "kolos_1993_H2",
"material": "H2",
"file": "H2/liu_2009__kolos_1993_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"W. Kołos and J. Rychlewski, J. Chem. Phys. 98, 3960 (1993)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
}
}
Table III, 1993, Theor., Ref. 40. Theoretical, printed without uncertainty. The same number as shiner_1993’s ab initio column (shiner_1993/ab_initio_H2, 124 417.471 cm^-1, Kolos, private communication).
liu_2009/shiner_1993_ref37_H2#
{
"id": "shiner_1993_ref37_H2",
"material": "H2",
"file": "H2/liu_2009__shiner_1993_ref37_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"shiner_1993"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1993, Expt., Ref. 37, revised in 41. Identical to shiner_1993/mccormack_H2 (124 417.507(12) cm^-1: McCormack et al.’s Rydberg data with Shiner et al.’s EF <- X recalibration).
liu_2009/shiner_1993_ref38_H2#
{
"id": "shiner_1993_ref38_H2",
"material": "H2",
"file": "H2/liu_2009__shiner_1993_ref38_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"shiner_1993"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1993, Expt., Ref. 38, revised in 41. Identical to shiner_1993/jungen_1990_H2 (124 417.484(17) cm^-1: Jungen et al.’s 1990 analysis with Shiner et al.’s recalibration).
liu_2009/wolniewicz_1993_H2#
{
"id": "wolniewicz_1993_H2",
"material": "H2",
"file": "H2/liu_2009__wolniewicz_1993_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"L. Wolniewicz, J. Chem. Phys. 99, 1851 (1993)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
}
}
Table III, 1993, Theor., Ref. 42. Theoretical, printed without uncertainty.
liu_2009/meiners_1994_H2#
{
"id": "meiners_1994_H2",
"material": "H2",
"file": "H2/liu_2009__meiners_1994_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"J.-C. D. Meiners, M.S. thesis, University of Delaware, 1994"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 1994, Expt., Ref. 43.
liu_2009/kolos_1994_H2#
{
"id": "kolos_1994_H2",
"material": "H2",
"file": "H2/liu_2009__kolos_1994_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"W. Kołos, J. Chem. Phys. 101, 1330 (1994)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
}
}
Table III, 1994, Theor., Ref. 44. Theoretical, printed without uncertainty.
liu_2009/wolniewicz_1995_H2#
{
"id": "wolniewicz_1995_H2",
"material": "H2",
"file": "H2/liu_2009__wolniewicz_1995_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"L. Wolniewicz, J. Chem. Phys. 103, 1792 (1995)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
}
}
Table III, 1995, Theor., Ref. 4. Theoretical, printed without uncertainty. The ‘latest theoretical’ value the paper compares with (p. 2 and p. 8: ‘believed to be accurate to within 0.01 cm^-1’).
liu_2009/de_lange_2002_H2#
{
"id": "de_lange_2002_H2",
"material": "H2",
"file": "H2/liu_2009__de_lange_2002_H2.csv",
"table": "tbl_c65377ced290",
"quantity": "ionization_energy",
"unit": "cm-1",
"abscissa": "label",
"use": "reproduced",
"reproduced_from": [
"A. de Lange, E. Reinhold and W. Ubachs, Phys. Rev. A 65, 064501 (2002)"
],
"parameters": {
"kind": "adiabatic",
"final_state": "X+ 2Sigma_g+ (v+ = 0, N+ = 0)",
"initial_state": "X 1Sigma_g+ (v = 0, N = 0), para-H2"
},
"uncertainty": {
"column": true,
"level": "not stated"
}
}
Table III, 2002, Expt., Ref. 2.
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.