First energy and angle differential measurements of e+e−-pairs emitted by internal pair conversion of excited heavy nuclei - Leinberger, U.; Berdermann, E.; Heine, F.; Heinz, S.; Joeres, O.; Kienle, P.; Koenig, I.; Koenig, W.; Kozhuharov, C.; Schröter, A.; Tsertos, H.; Hofmann, C.; et al. (Springer, 1998)
http://dx.doi.org/10.1007/s100500050058
Keywords: U