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DGe


Constants of diatomic molecules

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 72GeD
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
A 2Delta 25460 1 1027.82 Z 65.73  3.2860 2 0.1670 3 -0.0219 [0.000140] 4  1.6182 A lrarrow X R 25283.0 Z
missing citation; Veseth, 1973
X 2Pir 0 5 [1320.09] Z (19) 6  3.4145 7 0.0702  [0.0000832] 8  1.5874  

Notes

1A0 = 14.4, A1 = 9.9, A2 = 7.2; moderate J dependence.
2Spin-doubling constants gamma= 0.300 (v=0), gamma= 0.281 (v=1), gamma= 0.22 (v=2). Predissociation, see 11 .
3missing note
4D1 = 1.65E-4, D2 = 1.7E-4; also higher order constants.
5A0 = 891.86 Klynning and Lindgren, 1966, A1 = 894.35 Klynning and Lindgren, 1966; small J dependence. See also Veseth, 1973.
6Estimated from isotope shifts Klynning and Lindgren, 1966.
7Lambda-type doubling; in Deltav(2Pi1/2) = 0.2506(J+1/2) - ...; v=0
8D1 = 0.824E-4.
9From the predissociation in A 2Delta Klynning and Lindgren, 1966; thermochemical data give the same value Barrow and Deutsch, 1960.
10A0 = 10.3, A1 = 6.1; moderate J dependence. For a more detailed theoretical discussion of this 2Delta state see Veseth, 1971.
11Spin-doubling constants gamma = 0.473 (v=0) and gamma= 0.362 (v=1). Broadening of absorption lines due to predissociation above 27000 cm-1.
12D1 = 8.01E-4; also higher order constants.
13Spin-splitting constants 2= 6.52, gamma1 = 0.037, gamma2 = 0.048. Note that the definitions of 2, gamma1 and gamma2 used in Klynning, 1966 are those of Hougen Hougen, 1962 and differ from those used by Martin and Merer [see ref. Klynning and Lindgren, 1966 of GeF). The B0 value in the abstract of Klynning, 1966 and quoted in DONNSPEC is clearly wrong.
14A0 = 892.52 Klynning and Lindgren, 1966, A1 = 896.12 Klynning and Lindgren, 1966; small J dependence. See also Veseth, 1973.
15Lambda-type doubling, Deltav(2Pi1/2) = 0.496(J+1/2)-...; v=0
16D1 = 3.40E-4.
17From the value for GeH.

References

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Veseth, 1973
Veseth, L., Some anomalies in the electronic spectra of GeH, GeD, SnH, and SnD related to Hund's coupling case (c), J. Mol. Spectrosc., 1973, 48, 283. [all data]

Klynning and Lindgren, 1966
Klynning, L.; Lindgren, B., Rotational analysis of the 2«DELTA»-2«PI» band system of GeH and of GeD, Ark. Fys., 1966, 32, 575. [all data]

Barrow and Deutsch, 1960
Barrow, R.F.; Deutsch, J.L., Gaseous SiH and GeH, Proc. Chem. Soc. London, 1960, 122. [all data]

Veseth, 1971
Veseth, L., Second-order spin-orbit splitting in 2«DELTA» states of diatomic molecules, Physica (Amsterdam), 1971, 56, 286. [all data]

Klynning, 1966
Klynning, L., On the 4«SIGMA» state of GeH, Ark. Fys., 1966, 32, 563. [all data]

Hougen, 1962
Hougen, J.T., The rotational energy levels of diatomic molecules in 4«SIGMA» electronic states, Can. J. Phys., 1962, 40, 598. [all data]


Notes

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