Precision measurement of the branching fractions of the 4p 2P3/2 decay of Ca II R. Gerritsma, G. Kirchmair, F. Zähringer, J. Benhelm, R. Blatt and C. F. Roos Eur. Phys. J. D, 50 1 (2008) 13-19 Published online: 15 October 2008 DOI: 10.1140/epjd/e2008-00196-9