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Table C.1

Spectroscopic constants of in . All values are in cm−1 except that of ζ3, which is dimensionless.

Parameter Calculated(a) This work(b)
[3109.06283] 3108.3804(14)
B 9.28476(12) 9.27152(15)
C 4.57068(19) 4.574692(36)
ζ3 0.11576(5) 0.115685(49)
DJ × 103 [0.75425] 0.6922(15)
DJK × 103 [−1.35945] −1.2882(26)
DK × 103 [0.65058] 0.6405(45)
HJ × 109 −0.146(49)
q × 103 9.24(39)(c) 7.15(20)(c)
ηJ × 103 −0.638(10)
ηK × 103 0.682(19)
DqJ × 103 0.0266(22)
DqK × 103 0.665(21)

(a) Calculated uncertainties (values in parentheses) reflect twice the standard parameter fit error. The DJ, DJK, and DK parameters for were constrained to the calculated υ+ = 0 values. (b)Errors on parameters (values in parentheses) are equal to once the standard deviation. (c)A positive value of the -doubling parameter q here means that the component of the J = |k| = 1 level, which has zero spin-weight, is lower in energy than the component.

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