☍ 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	802.26	4.77			0.5525	0.00495							10.464	1.65434	6.89	9.8	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.
a\(^3\Pi\)	27239.5	830.3	4.64364	0.0123	-0.0001119	0.559454	0.004798	2.58e-05	47.3475	-0.07391	-0.000695	-0.0003002	-0.0306545		1.64708			Physica Sripta 10; 86 (1974). o, p, q from J. Chem. Phys. 156, 124306 (2022); \(B_e, \gamma_e, \lambda_e\) from Molecular Physics; 119; 1 (2021)
A\(^1\Pi\)	43949.2	803.94	5.99			0.5564	0.00534							10.56	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\(^3\Sigma^+\)	44813.2	786.37	7.64			0.5628									1.6391			Physica Sripta 10; 86 (1974). \(B_e, \gamma_e, \lambda_e\) from Molecular Physics; 119; 1 (2021)
B\(^1\Sigma^+\)	54251.0	866.6	7.45			0.58368	0.0056								1.60955			Physica Sripta 10, 86 (1974)
c\(^3\Sigma^+\)	54957.7	933.66	4.81			0.58861	0.00457					0.0015			1.6028			Physica Sripta 10, 86 (1974)
C\(^1\Sigma^+\)	57688.0	938.22	5.09	-0.017		0.58992	0.00458	-1.1e-05							1.601			Physica Sripta 10, 86 (1974)
D\(^1\Delta\)	61229.5	901.05	6.11			0.58297	0.00502								1.611			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	0.0043		-0.34	0.11					1.6021			J. Phys. Chem. A 128, 2752 (2024)
E\(^1\Pi\)	63689.4	923.02	5.28			0.58709	0.00464								1.597			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\(^1\Pi\)	65795.6	955.33	5.38			0.59281	0.00459								1.581			Physica Sripta 10, 86 (1974)
G\(^1\Sigma^+\)	66805.7	931.46				0.6049	0.00767								1.598			Physica Sripta 10, 86 (1974)
H\(^1\Sigma^+\)	67797.0					0.59214												Physica Sripta 10, 86 (1974)

For more information about the spectroscopic constants, please refer to Information.