AlCl Molecular Constants

AlCl

Aluminum Monochloride

	²⁷Al³⁵Cl		²⁷Al³⁷Cl
Constant	Value (Unc.)	Ref.	Value (Unc.)	Ref.
Y₀₁ [MHz]	7312.8411(21)	72000	7140.7832(21)	72000
Y₁₁ [MHz]	-48.3005(18)		-46.6058(17)
Y₂₁ [MHz]	0.1408(5)		0.1343(5)
Y₃₁ [kHz]	-0.17(4)		-0.16(4)
Y₀₂ [kHz]	-7.503(4)		-7.154(4)
Y₁₂ [kHz]	0.016(2)		0.015(2)
Y₀₃ [Hz]	-1.336(7) x 10^-3		-1.243(7) x 10^-3
eQq₀(Al) [MHz]	-29.8(10)	65001 ^a	-29.8(10)	^b
eQq₀(Cl) [MHz]	-8.6(10)	65001 ^a	-6.9(15)	^c
µ_r [u]	15.2301451		15.5977136
r_e [10^-10 m]	2.1301663(4) ^d		2.1301650(4) ^d

^a Recalculation of Ref. 65001, new assignments in frequency list, see [73020].

^b Assumed from ²⁷Al³⁵Cl, Ref. 65001.

^c Calculated from ratio of Q(³⁵Cl) / Q(³⁷Cl).

^d Recalculated as r_e = [505379.006(51) / µ_rY₀₁]^1/2 with units as given in table.

Additional Ref. 67042.

NIST Physical Measurement Laboratory