Home Symbol which looks like a small house Up Solid circle with an upward pointer in it

Strontium monoxide

Constants of diatomic molecules

Go To: Top, References, Notes

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
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 88Sr16O
C 1Sigma+ 28632.7 480.2 Z 2.6  0.2742 1 0.0021  3.5E-7  2.131 C rarrow X 2 R 28546.43 Z
Mahanti, 1932; missing citation
B 1Pi 24701.0 519.91 Z 3.24  0.2937 0.0015  5.0E-7  2.059 B rarrow X 2 R 24634.4 Z
Mahanti, 1932; missing citation; Deezsi, Koczkas, et al., 1954
Unclassified bands in the regions 14700 - 15700 and 16600 - 16900 cm-1. The emitter of these bands has long been in doubt Charton and Gaydon, 1956 Pearse and Gaydon, 1976; in flames, and in arcs in water vapour, strong bands attributed to SrOH ocur in the same regions Lagerqvist and Huldt, 1955 Huldt and Lagerqvist, 1956. The bands have recently been observed in dry Sr + N2O + CO (or N2*) flames, both in emission and in absorption Benard, Slafer, et al., 1977 Eckstrom, Barker, et al., 1977 missing citation, and have tentatively been attributed to the transitions 3Delta lrarrow a 3Pi and 1Delta, 1Sigma- lrarrow A' 1Pi or SrO.
A 1Sigma+ 10886.59 619.58 Z 0.89 3  0.30471 4 0.00112  3.2E-7  2.0219 A rarrow X 5 R 10870.40 Z
missing citation; missing citation; Almkvist and Lagerqvist, 1950; missing citation; missing citation; Brewer and Hauge, 1968
A' 1Pi 9400 472.8 6 H 2.06  0.2565 7 0.0017    2.204 A' rarrow X R 9310 H
Capelle, Broida, et al., 1975; Hecht, 1976
a 3Pii 9149 8 463.5 1.61  0.2584 0.0020    2.196  
X 1Sigma+ 0 653.49 Z 3.96  0.337980 0.002194  3.6E-7  1.91983 9  
Ault and Andrews, 1975
Microwave and rf sp. 10 11
Kaufman, Wharton, et al., 1965


1In nitrogen matrices.
2RKR Franck-Condon factors Liszt and Smith, 1971.
3Bandheads in the region 8959-9166 cm-1, originally Lagerqvist and Selin, 1956 attributed to a new system of SrO, have been shown Brewer and Hauge, 1968 to belong to the A rarrow X 0-3 sequence.
4Numerous perturbations by levels of a 3Pii and A' 1Pi Almkvist and Lagerqvist, 1950, Field, 1974.
5Franck-Condon factors Nicholls, 1962.
6Vibrational numbering Capelle, Broida, et al., 1975 confirmed by isotope studies Hecht, 1976.
7The rotational constants have been derived Capelle, Broida, et al., 1975 with the help of information gained from the analysis of perturbations in A 1Sigma+ Almkvist and Lagerqvist, 1950, Field, 1974.
8A = -70; all constants for this state derived by Field, 1974 from perturbations in A 1Sigma+ Almkvist and Lagerqvist, 1950.
9IR SPectrum 13
10By the molecular beam electric resonance method. muel = 8.913 -0.026(v+1/2) D Kaufman, Wharton, et al., 1965.
11Ab initio calculations of various ground state properties Yoshimine, 1968.
12From the appearance threshold of SrO in a crossed-beam
13missing note


Go To: Top, Constants of diatomic molecules, Notes

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

Mahanti, 1932
Mahanti, P.C., The band spectra of MgO, CaO and SrO, Phys. Rev., 1932, 42, 609. [all data]

Deezsi, Koczkas, et al., 1954
Deezsi, I.; Koczkas, E.; Matrai, T., Rotationsanalyse einiger blauen Banden des SrO-Molekuls, Acta Phys. Acad. Sci. Hung., 1954, 3, 95. [all data]

Charton and Gaydon, 1956
Charton, M.; Gaydon, A.G., Band spectra emitted by strontium and barium in arcs and flames, Proc. Phys. Soc. London Sect. A, 1956, 69, 520. [all data]

Pearse and Gaydon, 1976
Pearse, R.W.B.; Gaydon, A.G., The identification of molecular spectra, Pub. London - 4th Edition, Chapman and Hall, John Wiley & Sons, Inc., New York, 1976, 0. [all data]

Lagerqvist and Huldt, 1955
Lagerqvist, A.; Huldt, L., Die Trager der Flammenspektren der Erdalkalimetalle, Die Naturwissenschaften, 1955, 42, 365. [all data]

Huldt and Lagerqvist, 1956
Huldt, L.; Lagerqvist, A., Zum Ursprung der Bandenspektren von Calcium und Strontium, Ark. Fys., 1956, 11, 347. [all data]

Benard, Slafer, et al., 1977
Benard, D.J.; Slafer, W.D.; Hecht, J., Chain reaction chemiluminescence of alkaline earth catalyzed N2O-CO flames, J. Chem. Phys., 1977, 66, 1012. [all data]

Eckstrom, Barker, et al., 1977
Eckstrom, D.J.; Barker, J.R.; Hawley, J.G.; Reilly, J.P., Intracavity dye laser spectroscopy studies of the Ba + N2O, Ca + N2O + CO, and Sr + N2O + CO reactions, Appl. Opt., 1977, 16, 2102. [all data]

Almkvist and Lagerqvist, 1950
Almkvist, G.; Lagerqvist, A., Perturbations in the infra-red bands of SrO, Ark. Fys., 1950, 2, 233. [all data]

Brewer and Hauge, 1968
Brewer, L.; Hauge, R., Near infrared bands of diatomic CaO and SrO, J. Mol. Spectrosc., 1968, 25, 330. [all data]

Capelle, Broida, et al., 1975
Capelle, G.A.; Broida, H.P.; Field, R.W., Photon yields of several reactions producing diatomic strontium oxide and halides, and SrO (A'1«PI»-X1«SIGMA»): a new band system, J. Chem. Phys., 1975, 62, 3131. [all data]

Hecht, 1976
Hecht, J., Vibrational analysis of the A'1«PI» state of strontium oxide using two isotopes, J. Chem. Phys., 1976, 65, 5026. [all data]

Ault and Andrews, 1975
Ault, B.S.; Andrews, L., Nitrogen matrix reactions of alkaline earth metal atoms with ozone: infrared spectra of the alkaline earth metal oxide molecules, J. Chem. Phys., 1975, 62, 2320. [all data]

Kaufman, Wharton, et al., 1965
Kaufman, M.; Wharton, L.; Klemperer, W., Electronic structure of SrO, J. Chem. Phys., 1965, 43, 943. [all data]

Liszt and Smith, 1971
Liszt, H.S.; Smith, Wm.H., RKR Franck-Condon factors for blue and ultraviolet transitions of some metal oxides, J. Quant. Spectrosc. Radiat. Transfer, 1971, 11, 1043. [all data]

Lagerqvist and Selin, 1956
Lagerqvist, A.; Selin, L.-E., Einige ultrarote Banden des SrO Molekules, Ark. Fys., 1956, 11, 323. [all data]

Field, 1974
Field, R.W., Assignment of the lowest 3«PI» and 1«PI» states of CaO, SrO, and BaO, J. Chem. Phys., 1974, 60, 2400. [all data]

Nicholls, 1962
Nicholls, R.W., Franck-Condon factors to high vibrational quantum numbers II: SiO, MgO, SrO, AlO, VO, NO, J. Res. Nat. Bur. Stand. Sect. A, 1962, 66, 227. [all data]

Yoshimine, 1968
Yoshimine, Y., Computed ground state properties of BeO, MgO, CaO, and SrO in molecular orbital approximation, J. Phys. Soc. Jpn., 1968, 25, 1100. [all data]


Go To: Top, Constants of diatomic molecules, References