Speaker
Description
Penning traps are high-precision tools for mass spectrometry and spectroscopy experiments. Two such experiments based on Penning traps at the GSI Helmholtz Centre for Heavy Ion Research are: ARTEMIS and SHIPTRAP. The ARTEMIS Penning trap experiment aims to measure the magnetic moment of an electron bound to heavy, highly charged ions using the laser-microwave double-resonance spectroscopy technique with $ 10^{-9} $ level of accuracy. These high-precision $ g $-factor measurements would be the most stringent test of QED in the limits of extreme electromagnetic fields of the nucleus. $ ^{40}$Ar$^{13+} $ is the first candidate for these high-precision measurements followed by $ ^{209}$Bi$^{82+} $. In order to perform the double-resonance spectroscopy, a pure cooled cloud of Ar$^{13+} $ ions needs to be prepared in the spectroscopy trap of ARTEMIS.
The SHIPTRAP mass spectrometer enables high-precision measurements of superheavy and exotic nuclei with rather short half-lives of about 200\,ms and above. These mass measurements are performed using the phase-imaging ion-cyclotron-resonance technique. This talk will present the studies of highly charged argon ions produced in ARTEMIS and high-precision mass measurements of radio-nuclides obtained from the recoil-ion sources: $ ^{225}$Ac and $ ^{223}$Ra, installed in the cryogenic gas cell of SHIPTRAP.
