Recent high-precision mass measurements with the Penning trap spectrometer ISOLTRAP.

The Penning trap mass spectrometer ISOLTRAP has to date been used for the determination of close to 300 masses of radionuclides. A relative mass uncertainty of 10-8 can now be reached. Recent highlights were measurements of rp-process nuclides as for instance 72-74Kr or superallowed β emitters like 22Mg, 74Rb and 34Ar. The heaviest nuclides measured so far with ISOLTRAP are neutron-rich radium and francium isotopes. An overview of ISOLTRAP mass measurements and details about the recent experiment on 229-232Ra and 230Fr are presented. [ABSTRACT FROM AUTHOR]