Molecular hyperfine parameters in the 1 3Σu+ and 1 3Σg+ states of Li2, Na2, K2 and Rb2 Marius Lysebo and Leif Veseth Eur. Phys. J. D, 67 7 (2013) 142 Published online: 16 July 2013 DOI: 10.1140/epjd/e2013-40062-1