High-precision mass measurement of neutron-rich 96Kr

• Published in: Hyperfine interactions 2020, Vol.241 (1), Article 59
• Main Authors: Smith, Matthew B., Murböck, Tobias, Dunling, Eleanor, Jacobs, Andrew, Kootte, Brian, Lan, Yang, Leistenschneider, Erich, Lunney, David, Lykiardopoulou, Eleni Marina, Mukul, Ish, Paul, Stefan F., Reiter, Moritz P., Will, Christian, Dilling, Jens, Kwiatkowski, Anna A.
• Format: Article
• Language: English
• Subjects: 1st International Conference; Atomic; Atomic properties; Calcium isotopes; Condensed Matter Physics; Contaminants; Germany 19-24 May 2019; Hadrons; Heavy Ions; Ions; Krypton; Mainz; Merger of the Poznan Meeting on Lasers and Trapping Devices in Atomic Nuclei Research and the International Conference on Laser Probing; Molecular; Nuclear deformation; Nuclear Physics; Optical and Plasma Physics; Physics; Physics and Astronomy; Proceedings of PLATAN 2019; Resolution; Surfaces and Interfaces; Thin Films
• ISSN: 0304-3843; 1572-9540
• DOI: 10.1007/s10751-020-01722-2

While the nuclear deformation in the region around Z = 40 and N = 60 has been studied in great detail, the possible onset of nuclear deformation in the isotopic chain of krypton ( Z = 36) is still a subject of controversy. Here, we present a high-precision mass measurement of the neutron-rich nuclide 96 Kr, as measured by the Multiple-Reflection Time-of-Flight Mass Spectrometer (MR-TOF-MS) at TRIUMF’s Ion Trap for Atomic and Nuclear Science (TITAN). A statistical method, based on a hyper-exponentially modified Gaussian, has been employed to model the data. As such, the uncertainty introduced by overlapping peaks from beam contaminants was reduced and the mass excess of 96 Kr determined to be -53097(57)keV. The capability of the method has been confirmed with measurements of the stable isotopic pair 40 Ar/ 40 Ca, in which a relative accuracy Δ m / m of 3.5 ⋅ 10 − 8 and a mass resolving power of more than 400000 were achieved.