PF Molecular Constants

PF

Phosphorus Monofluoride

Parameter	³¹P¹⁹F X ^³Σ^{^-}	Ref.
B₀ [MHz]	16 920.9763(47)	85012
D₀ [kHz]	30.384(76)
λ ₀ [MHz]	88 385.93(31)
λ _D [kHz]	28.0(26)
γ₀ [MHz]	44.969(38)
b(P) + c(P)/3 [MHz]	116.809(44)
c(P) [MHz]	-502.645(103)
c_D(P) [MHz]	0.0525(161)
b(F) + c(F)/3 [MHz]	89.433(47)
c(F) [MHz]	-240.294(91)
µ_r [u]	11.775 5957
r₀ [10^-10 m]	1.592 59^a

^a Calculated as r₀ = [505379.006(51) / µ_r B₀]^1/2 with units as given in table.

NIST Physical Measurement Laboratory