20th International Conference on Electromagnetic Isotope Separators and Related Topics (EMISXX)

Recent MR-TOF-MS developments at Jyväskylä

Not scheduled

30m

Chateau Fairmont Whistler

Oral invited talk Ion optics and spectrometers Instrumentation for RIB experiments II

Speaker

Ville Virtanen (University of Jyväskylä)

Description

During the last decade Multi-Reflection Time-of-Flight Mass-Spectrometers (MR-ToF-MS) [1] have been established as integral parts of radioactive beam facilities. These devices are used to separate and to measure the atomic masses of particularly exotic, short-lived radioactive nuclei to high precision, shedding light on the nuclear forces [2], the composition of neutron stars [3], and the yields of radioactive ion production [4]. An MR-ToF-MS has been integrated to the University of Jyväskylä Ion-Guide Isotope-Separator On-Line (IGISOL) facility [5] and utilized for mass separation and measurements of exotic radioactive nuclei. In this overview, technical developments of the IGISOL MR-ToF-MS and the miniaturized radiofrequency quadrupole cooler-buncher [6]; the recent on-line measurement results, including a solution to the long-standing two-proton decay conundrum of 94Ag(21+); and the results of the latest MR-ToF-MS assisted in-source laser spectroscopy of Ag isotopes are presented.

References

[1] W. R. Plaß, et al., “Multiple-reflection time-of-flight mass spectrometry”, International Journal of Mass Spectrometry, vol. 349-350, pp. 134–144, 2013. doi: 10.1016/j.ijms.2013.06.005.

[2] F. Wienholtz et al. “Masses of exotic calcium isotopes pin down nuclear forces.” Nature vol. 498, pp. 346–349 (2013). doi: 10.1038/nature12226

[3] R. N. Wolf et al. “Plumbing Neutron Stars to New Depths with the Binding Energy of the Exotic Nuclide 82Zn”, Physical Review Letters, vol. 110, iss. 4, 2013. doi: 10.1103/PhysRevLett.110.041101

[4] S. Canarozzo et al. “Isomeric yield ratios and mass spectrometry of Y and Nb isotopes in the neutron-rich N=60 region: the unusual case of 98Y” arXiv 2025 url: https://arxiv.org/abs/2504.11274

[5] I. Moore et al., “Towards commissioning the new IGISOL-4 facility”, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, vol. 317, pp. 208–213, 2013. doi: 10.1016/j.nimb.2013.06.036.

[6] V. A. Virtanen, et al., “Miniaturised cooler-buncher for reduction of longitudinal emittance at IGISOL”, Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment vol. 1072, 170186, 2025. doi: 10.1016/j.nima.2024.170186.