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# DSr

**Formula:**DSr**Molecular weight:**89.63**Information on this page:****Options:**

## 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

Symbol | Meaning |
---|---|

State | electronic state and / or symmetry symbol |

T_{e} | minimum electronic energy (cm^{-1}) |

ω_{e} | vibrational constant – first term (cm^{-1}) |

ω_{e}x_{e} | vibrational constant – second term (cm^{-1}) |

ω_{e}y_{e} | vibrational constant – third term (cm^{-1}) |

B_{e} | rotational constant in equilibrium position (cm^{-1}) |

α_{e} | rotational constant – first term (cm^{-1}) |

γ_{e} | rotation-vibration interaction constant (cm^{-1}) |

D_{e} | centrifugal distortion constant (cm^{-1}) |

β_{e} | rotational constant – first term, centrifugal force (cm^{-1}) |

r_{e} | internuclear distance (Å) |

Trans. | observed transition(s) corresponding to electronic state |

ν_{00} | position of 0-0 band (units noted in table) |

State | T_{e} | _{e} | _{e}x_{e} | _{e}y_{e} | B_{e} | _{e} | _{e} | D_{e} | _{e} | r_{e} | Trans. | _{00} |
---|---|---|---|---|---|---|---|---|---|---|---|---|

Fragments of additional absorption systems above 30000 cm^{-1};
tentative rotational analyses. | ||||||||||||

↳Khan, 1966; Khan and Butt, 1968; missing citation; missing citation | ||||||||||||

F ^{2}^{+} | 34097 | [964.6] Z | (17) 1 | [2.0334] 2 | 0.032 | [3.47E-5] | [2.0519] | F X V | 34164.87 Z | |||

↳Edvinsson, Kopp, et al., 1963; Khan, 1963; Khan, 1966; Khan and Butt, 1968 | ||||||||||||

C ^{2}^{+} | 26226 | [943] Z | (11.9) 3 | 1.98 4 | 0.03 | [2.5E-5] | 2.08 | C X V | 26279 Z | |||

↳Watson, Fredrickson, et al., 1936; missing citation | ||||||||||||

B ^{2}^{+} | 14335 | [857] Z | (10) 1 | 1.9426 5 | 0.0349 | [4.02E-5] 6 | 2.0994 | B X V | 14343.9 Z | |||

↳Watson, Fredrickson, et al., 1936 | ||||||||||||

State | T_{e} | _{e} | _{e}x_{e} | _{e}y_{e} | B_{e} | _{e} | _{e} | D_{e} | _{e} | r_{e} | Trans. | _{00} |

X ^{2}^{+} | 0 | [841] Z | (8.6) 3 | 1.8609 7 | 0.0292 | [3.47E-5] 8 | 2.1449 |

### Notes

1 | From isotope relations. |

2 | Spin doubling constant _{0} = +0.035_{7}. |

3 | From the value for SrH. |

4 | Breaking-off above N'=29 and 19 in v'=0 and 1, respectively Khan, 1963, 2. Strong perturbations. |

5 | Spin doubling constant _{0} = -2.01 N < 10 Watson, Fredrickson, et al., 1936. See 15. |

6 | D_{1} = 3.81E-5. |

7 | Spin doubling constant _{0} = +0.061_{3}. |

8 | D_{1} = 3.64E-5. |

9 | From the predissociation in C ^{2}^{+} assuming dissociation
into ^{3}P_{0} + ^{2}S. |

10 | Spin doubling constant _{0} = +0.076. All lines are diffuse owing to predissociation. |

11 | Breaking-off in emission at low pressure above N'=19 and 4 in v'=0 and 1, respectively Khan, 1963, 2. Perturbations. |

12 | Strong perturbations. |

13 | Franck-Condon factors Singh and Srivastava, 1968. |

14 | Perturbations. |

15 | Spin doubling constant _{0} = -3.81 N < 10 Watson, Fredrickson, et al., 1936.
For a more elaborate evaluation of the
spin splitting including higher-order correction terms see Veseth, 1971. |

16 | A_{0} ~ +300. See also 17. |

17 | Very large -type doubling, see Watson and Fredrickson, 1932, Veseth, 1971, 2.
The constants given here are effective values; see,
however, Veseth, 1971, 3 who has evaluated the true constants by taking into account several usually
neglected corrections to the rotational energy formulae for a ^{2} state. |

18 | From Watson, Fredrickson, et al., 1936; spin doubling constant 0 = 0.122 Watson, Fredrickson, et al., 1936.
Edvinsson, Kopp, et al., 1963 give B_{0} = 3.6336, D_{0} = 13.39E-5. |

19 | D_{1} = 12.9E-5. |

20 | In argon matrix at 4 K. |

## References

**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.
**

**Khan, 1966**

Khan, M.A.,
*Rotational analysis of some new absorption bands of SrH and SrD in the ultra-violet region*,
**Proc. Phys. Soc. London**, 1966, 89, 165. [all data]

**Khan and Butt, 1968**

Khan, M.A.; Butt, M.R.,
*A study of some new absorption bands of SrH and SrD in the ultra-violet region*,
**J. Phys. B:**, 1968, 1, 745. [all data]

**Edvinsson, Kopp, et al., 1963**

Edvinsson, G.; Kopp, I.; Lindgren, B.; Aslund, N.,
*Rotational analysis of an ultraviolet system of the hydrides and deuterides of Ca, Sr and Ba*,
**Ark. Fys.**, 1963, 25, 95. [all data]

**Khan, 1963**

Khan, M.A.,
*SrH and SrD bands at 2927 Å and 2928 Å*,
**Proc. Phys. Soc. London**, 1963, 81, 1047. [all data]

**Watson, Fredrickson, et al., 1936**

Watson, W.W.; Fredrickson, W.R.; Hogan, M.E., Jr.,
*Strontium deuteride and hydride spectra*,
**Phys. Rev.**, 1936, 49, 150. [all data]

**Khan, 1963, 2**

Khan, M.A.,
*Extension of the C ^{2}«SIGMA» --> X^{2}«SIGMA» system of SrD*,

**Proc. Phys. Soc. London**, 1963, 82, 564. [all data]

**Singh and Srivastava, 1968**

Singh, P.D.; Srivastava, Y.P.,
*Franck-Condon factors and r-centroids for some bands of the SrH*,
**J. Quant. Spectrosc. Radiat. Transfer**, 1968, 8, 1443. [all data]

**Veseth, 1971**

Veseth, L.,
*An investigation of the interaction between close-lying ^{2}«SIGMA» and ^{2}«PI» states of diatomic molecules. I. Spin-splitting of the ^{2}«SIGMA» levels*,

**Mol. Phys.**, 1971, 20, 1057. [all data]

**Watson and Fredrickson, 1932**

Watson, W.W.; Fredrickson, W.R.,
*The spectrum of strontium hydride*,
**Phys. Rev.**, 1932, 39, 765. [all data]

**Veseth, 1971, 2**

Veseth, L.,
*An investigation of the interaction between close-lying ^{2}«SIGMA» and ^{2}«PI» states of diatomic molecules. II. «LAMBDA»-doubling of the ^{2}«PI» levels*,

**Mol. Phys.**, 1971, 21, 287. [all data]

**Veseth, 1971, 3**

Veseth, L.,
*Corrections to the spin-orbit splitting in ^{2}«PI» states of diatomic molecules*,

**J. Mol. Spectrosc.**, 1971, 38, 228. [all data]

## Notes

**Go To:** Top, Constants of diatomic molecules, References

- Data from NIST Standard Reference Database 69:
*NIST Chemistry WebBook* - The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
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