# DSr

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

## 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

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:
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