Abstract
A multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS) has been installed and integrated into the TITAN experiment at TRIUMF. The MR-TOF-MS extends the capabilities and improves the performance of the TITAN experiment, for instance it provides fast isobar separation, short measurement cycles, yield measurements and broad-band beam diagnosis, and enhanced rate capabilities and dynamic range. Thereby, even more exotic nuclides become accessible at TITAN for experiments. Such improved capabilities of TITAN have been used in first experiments to investigate the sub-shell closure of neutron-rich nuclides at N = 32 and the r-process nucleo-synthesis for masses at A ∼ 85. The vacuum system, electronics and data-acquisition hardware and software have been recently upgraded. For the first time an isomeric state has been measured with TITAN′s MR-TOF-MS, 84mRb (excitation energy: 464 keV). The accurate measurement of excitation energies of low-lying isomeric states is possible due to the high mass resolving power of TITAN′s MR-TOF-MS and a specialized data-analysis procedure.
Highlights
TRIUMF s Ion Trap for Atomic and Nuclear science (TITAN) [1, 2] is a multiple ion-trap system capable of performing high-precision mass measurements and in-trap decay spectroscopy [3]
This contamination often prevents precision measurements of the exotic species of interest. To overcome this limitation an isobar separator and mass spectrometer based on the Multiple-Reflection Time-Of-Flight Mass Spectrometry (MR-TOF-MS) technique has been developed at the Justus Liebig University Giessen [8] and installed recently at TITAN (Fig. 1)
Being able to detect and separate isobars and isomers and at the same time measure a broadband mass range, the new MR-TOF-MS has become a standard device in recent experiments at TITAN
Summary
TRIUMF s Ion Trap for Atomic and Nuclear science (TITAN) [1, 2] is a multiple ion-trap system capable of performing high-precision mass measurements and in-trap decay spectroscopy [3]. This contamination often prevents precision measurements of the exotic species of interest To overcome this limitation an isobar separator and mass spectrometer based on the Multiple-Reflection Time-Of-Flight Mass Spectrometry (MR-TOF-MS) technique has been developed at the Justus Liebig University Giessen [8] and installed recently at TITAN (Fig. 1). The use of these novel techniques (RFQ-based switchyard and re-trapping) allowed the integration of the very compact MR-TOF-MS instrument with minimal impact on the existing TITAN beam line. It provides cooled and clean isobaric beams delivered to downstream ion traps and other measurement devices.
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