Mainz 2026 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry (joint session MS/Q)

MS 2.1: Invited Talk

Monday, March 2, 2026, 17:00–17:30, N 6

Pushing the Boundaries at FRIB: High-Precision Mass Measurements Near The Driplines — •Franziska Maria Maier, Scott Campbell, Hannah Erington, Christian Ireland, and Ryan Ringle — FRIB, USA

With new radioactive-ion-beam facilities such as FRIB becoming operational, the properties of nuclei in close proximity to the driplines are coming within reach of high-precision measurements. Within the last two years, at a fraction of FRIB’s ultimate beam intensity, we used the LEBIT facility to successfully perform Penning-trap mass measurements of ²²Al [1], ^101,103Sn [2,3] and ²³Si [4]. These masses provide insights into the smoothness of the mass surface, help assess isospin symmetry breaking and offer valuable anchor points for nuclear models - especially for predicting properties near the driplines, where experimental data remain scarce. As FRIB ramps up its beam intensity, the production of many more nuclei will enable new and exceptional research opportunities. However, the short half-lives of many of these nuclei pose challenges for Penning-trap mass spectrometry. To overcome these, we are developing MR-ToF devices at FRIB, that will also expand FRIB’s mass separation capabilities [5,6].

[1] S. Campbell et al., PRL 132, 152501 (2024)

[2] C.M. Ireland, F.M. Maier et al., PRC 111, 014314 (2025)

[3] C.M. Ireland et al., arxiv.org/abs/2510.11815

[4] F.M. Maier et al., PRC 112, 014329 (2025)

[5] F.M. Maier, C.M. Ireland et al., arxiv.org/abs/2509.16428

[6] C.M. Ireland, F.M. Maier et al., arxiv.org/abs/2510.11741

Keywords: mass spectrometry; radioactive ions; nuclear structure; Penning trap; MR-ToF