Studies of Highly Charged Ions in the ARTEMIS Trap and Direct Mass Measurements of Radionuclides at SHIPTRAPONLINE ONLY

Penning traps are high-precision tools for spectroscopy and mass spectrometry 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 [1, 2] aims to measure the magnetic moment of an electron bound to heavy, highly charged ions using the laser-microwave double-resonance spectroscopy technique [3] 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. 40Ar13+ is the first candidate for these high-precision measurements followed by 209Bi82+. In order to perform the double resonance spectroscopy, a pure cooled cloud of Ar13+ 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 [4]. This talk will present the studies of highly charged argon ions produced in ARTEMIS and high-precision mass measurements of 221Fr, 219Rn, 213Bi, 211Pb, 209Pb, 207Tl and 207Pb, with a relative precision of δm/m ∼ 10−9, at SHIPTRAP. These radionuclides are obtained from the recoil-ion sources: 225Ac and 223Ra, installed in the cryogenic gas cell of SHIPTRAP.

References

[1] Quint W et al. 2008 Physical Review A 78 03251
[2] Sturm S et al. 2017 Atoms 5 4
[3] Lindenfels D v et al. 2013 Physical Review A 87 023412
[4] Eliseev S et al. 2013 Physical Review Letters 110 082501