https://doi.org/10.1140/epja/i2012-12049-x
Review
Isomer and decay studies for the rp process at IGISOL
1
Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014, Jyväskylä, Finland
2
Petersburg Nuclear Physics Institute, 188300, Gatchina, Russia
3
Dating Laboratory, University of Helsinki, Helsinki, P.O. Box 64, FI-00014, Finland
4
Gesellschaft für Schwerionenforschung mbH, Planckstrasse 1, D-64291, Darmstadt, Germany
* e-mail: anu.k.kankainen@jyu.fi
Received:
31
January
2012
Accepted:
13
February
2012
Published online:
19
April
2012
This article reviews the decay studies of neutron-deficient nuclei within the mass region 
performed at the Ion-Guide Isotope Separator On-Line (IGISOL) facility in the University of Jyväskylä over last 25 years. Development from He-jet measurements to on-line mass spectrometry, and eventually to atomic mass measurements and post-trap spectroscopy at IGISOL, has yielded studies of around 100 neutron-deficient nuclei over the years. The studies form a solid foundation to astrophysical rp -process path modelling. The focus is on isomers studied either via spectroscopy or via Penning-trap mass measurements. The review is complemented with recent results on the ground and isomeric states of 90Tc . The excitation energy of the low-spin isomer in 90Tc has been measured as 
keV with JYFLTRAP double Penning trap and the ground state of 90Tc has been confirmed to be the (8+) state with a half-life of 
s. Finally, the mass-excess results for the spin-gap isomers 53Co
m
and 95Pd
m
and implications from the JYFLTRAP mass measurements for the (21+) isomer in 94Ag are discussed.
© SIF, Springer-Verlag Berlin Heidelberg, 2012
