Reference Label	Details
Hayden 1982	C. C. Hayden, D. M. Neumark, K. Shobatake, R. K. Sparks, and Y. T. Lee, J. Chem. Phys. 76, 3607-3613 (1982) Methylene Singlet–Triplet Energy Splitting by Molecular Beam Photodissociation of Ketene