Strontium monoiodide

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

Data collected through September, 1977

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 (88)Sr127I
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
F  210.4 H 0.40        F → A or B V 19902.1 H
↳Kamalasanan, 1975
           F → A or B V 19599.3 H
↳Kamalasanan, 1975
D (2Σ) 28944.0 200.4 H 0.50        D → X V 28957.1 H
↳missing citation; Ashrafunnisa, Rao, et al., 1973
C (2Π) 23223.4 168.5 H 0.40        C ↔ X 1 R 23220.6 H
↳Walters and Barratt, 1928; Mesnage, 1939; missing citation
22666.1 170.9 H 0.36        C ↔ X 1 R 22664.5 H
↳Walters and Barratt, 1928; Mesnage, 1939; missing citation
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
B (2Σ) 14815.9 2 182.2 H 0.37        B → X 1 V 14820.1 H
↳missing citation
A (2Π) 14748.8 2 179.5 H 0.32        A ↔ X 1 V 14751.7 H
↳Walters and Barratt, 1928; Shukla, 1970; Reddy, Reddy, et al., 1971; missing citation
14422.7 2 182.3 H 0.54        A ↔ X 1 V 14427.0 H
↳Walters and Barratt, 1928; Shukla, 1970; Reddy, Reddy, et al., 1971; missing citation
X 2Σ+ 0 174.1 3 H 0.35 3         

Notes

1Radiative lifetimes measured by Dagdigian, Cruse, et al., 1974: τ(A)= 42 ns, τ(B)= 46 ns, τ(C)= 36 ns. There seems to be some uncertainty concerning the correct identification of the B state emission.
2According to Ashrafunnisa, Rao, et al., 1973, 2 the tentative assignments for these two states or substates (i.e. Σ and Π) should be reversed.
3Average values for the lower state constants of A.. .D → X.
4From a reactive scattering study of the Sr + HI reaction by the crossed molecular beam technique Mims, Lin, et al., 1972. The ionic model calculations of Krasnov and Karaseva, 1965 predict D00 ~ 2.92 eV Krasnov and Karaseva, 1965.

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.

Kamalasanan, 1975
Kamalasanan, M.N., New band system of SrI molecule in the region 4900-5250 Å, Indian J. Pure Appl. Phys., 1975, 13, 124. [all data]

Ashrafunnisa, Rao, et al., 1973
Ashrafunnisa; Rao, D.V.K.; Rao, P.T., A new ultraviolet band system of the SrI molecule, J. Phys. B:, 1973, 6, 2653. [all data]

Walters and Barratt, 1928
Walters, O.H.; Barratt, S., The alkaline earth halide spectra and their origin, Proc. R. Soc. London A, 1928, 118, 120. [all data]

Mesnage, 1939
Mesnage, P., Recherches sur les decharges de haute frequence et leur application a la spectroscopie moleculaire, Ann. Phys. (Paris), 1939, 12, 5. [all data]

Shukla, 1970
Shukla, M.M., Analysis of the A-X band system of the SrI molecule, Indian J. Pure Appl. Phys., 1970, 8, 855. [all data]

Reddy, Reddy, et al., 1971
Reddy, B.R.K.; Reddy, Y.P.; Rao, C.G.R.; Rao, P.T., The spectrum of SrI in the photographic infrared, Curr. Sci., 1971, 40, 186. [all data]

Dagdigian, Cruse, et al., 1974
Dagdigian, P.J.; Cruse, H.W.; Zare, R.N., Radiative lifetimes of the alkaline earth monohalides, J. Chem. Phys., 1974, 60, 2330. [all data]

Ashrafunnisa, Rao, et al., 1973, 2
Ashrafunnisa; Rao, D.V.K.; Rao, P.T., The band spectrum of SrI in the region λ6500-λ7200 Å, J. Phys. B:, 1973, 6, 1503. [all data]

Mims, Lin, et al., 1972
Mims, C.A.; Lin, S.-M.; Herm, R.R., Crossed beam collision mechanics: reactions of Ca, Sr, and Ba with HI and limits on D0° for CaI, SrI, and BaI, J. Chem. Phys., 1972, 57, 3099. [all data]

Krasnov and Karaseva, 1965
Krasnov, K.S.; Karaseva, N.V., Reevaluation of the spectroscopic dissociation energies of subhalides of the IIa group, Opt. Spectrosc. Engl. Transl., 1965, 19, 14, In original 30. [all data]

Notes

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