☍ About the AlF spectroscopy database

     Aluminum monofluoride, AlF, has emerged as a highly promising candidate for experiments involving the laser cooling and trapping of cold molecules.

     This database is dedicated to the spectroscopic constants of AlF across various electronic states.

     The database has 15 electronic states:

          X\(^1\Sigma^+\), a\(^3\Pi\), A\(^1\Pi\), b\(^3\Sigma^+\), B\(^1\Sigma^+\), c\(^3\Sigma^+\), C\(^1\Sigma^+\), D\(^1\Delta\), d\(^3\Pi\), e\(^3\Delta\), E\(^1\Pi\), f\(^3\Sigma^+\), F\(^1\Pi\), G\(^1\Sigma^+\), H\(^1\Sigma^+\)

☍  The electronic states of AlF

  ⚬ Energy level scheme

     This figure presents the energy level scheme of AlF, highlighting the experimentally measured electronic states and the transitions between their vibrational ground states. The numbers indicate the Einstein A coefficients associated with each transition.

☍ The spectroscopic constants of AlF

Electronic state	\( T_e\)	\( \omega_e\)	\( \omega_ex_e\)	\( \omega_ey_e\)	\( \omega_ez_e\)	\( B_e\)	\( \alpha_e\)	\( \beta_e\)	\( A_e\)	\( \zeta_e\)	\( \eta_e\)	\( \gamma_e\)	\( \lambda_e\)	\( D_e\)	\( R_e\)	\( D_0\)	IP	Reference
X\(^1\Sigma^+\)	0.0	802.32447	4.8499145	0.0195737	-3.407e-05	0.552480208	0.0049842606	1.721536e-05						10.4799896	1.6543689056	6.89	9.8	K.-Q. Zhang, B. Guo, V. Braun, M. Dulick, P. F. Bernath, Infrared Emission spectroscopy of BF and AlF, J. Mol. Spectrosc. 170, 82-93 (1995) K.P.Huber and G.Herzberg, Molecular Spectra and Molecular Structure. Springer-Verlag; Berlin; Germany; 1979.
a\(^3\Pi\)	27239.4529	830.2807	4.64364	0.0123	-0.0001119	0.557376	0.004798	2.58e-05	47.3672	-0.07391	-0.000695	-0.0003002	0.0922638		1.64708			Physica Sripta 10; 86 (1974). \(B_e, \alpha_e, \beta_e, \zeta_e, \eta_e\) , o, p, q from J. Chem. Phys. 156, 124306 (2022); \(A_e, \lambda_e\) from Molecular Physics; 119; 1 (2021)
A\(^1\Pi\)	43949.2	803.94	5.99	-0.05		0.5564	0.00534	-4.3e-05							1.6485			R.F. Barrow et al., Physica Scripta. Vol. 10, 86-102, 1974; K.P.Huber and G.Herzberg, Molecular Spectra and Molecular Structure. Springer-Verlag; Berlin; Germany; 1979. q_e from Phys. Rev. A 100, 052513 (2019)
b\(^3\Sigma^+\)	44804.5692	786.37	7.64	-0.009		0.5628	0.00651	-2e-05				-0.0003002	0.0306545		1.644			Physica Sripta 10; 86 (1974). \(T_e, LambdaSS, \gamma\) from Molecular Physics; 119; 1 (2021)
B\(^1\Sigma^+\)	54251.0	866.6	7.45			0.58368	0.0056								1.6095			Physica Sripta 10, 86 (1974)
c\(^3\Sigma^+\)	54957.613	933.573	4.79689			0.588798	0.00448794							13.2757	1.60254			Physica Sripta 10, 86 (1974)
C\(^1\Sigma^+\)	57687.99	938.22	5.09	-0.017		0.58992	0.00458	-1.1e-05							1.60101			Physica Sripta 10, 86 (1974)
D\(^1\Delta\)	61229.52	901.05	6.11			0.58297	0.00502								1.61053			Physica Sripta 10, 86 (1974)
d\(^3\Pi\)	62434.6	944.5	5.21			0.5931	0.005		5.73	-0.024					1.594			J. Phys. Chem. A 128, 2752 (2024)
e\(^3\Delta\)	63204.5	941.3	6.57			0.5911	0.0045		-0.34	0.11					1.6021			J. Phys. Chem. A 128, 2752 (2024)
E\(^1\Pi\)	63689.43	923.02	5.28			0.58709	0.00464								1.60486			Physica Sripta 10, 86 (1974)
f\(^3\Sigma^+\)	65017.1	945.0	5.84			0.599	0.006								1.5888			J. Phys. Chem. A 128, 2752 (2024)
F\(^1\Pi\)	65795.57	955.33	5.38			0.59281	0.00459								1.5971			Physica Sripta 10, 86 (1974)
G\(^1\Sigma^+\)	66805.74	931.46				0.6049	0.00767								1.5811			Physica Sripta 10, 86 (1974)
H\(^1\Sigma^+\)	67796.97					0.59214									1.598			Physica Sripta 10, 86 (1974)

Term energies referenced to the v=0 state of the electronic ground state X ¹Σ⁺, 400.139 cm^-1. For more information about the spectroscopic constants, please refer to Information.