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Precision Mass Measurements of Short-lived Nuclides at the Heavy-ion Storage Ring in Lanzhou
Authors:ZHANG Yuhu  WANG Meng  Yu A Litvinov  XU Hushan
Affiliation:1.Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science,Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;2.GSI Helmholtzzentrum fur Schwerionenforschung, Planckstrae 1, Darmstadt 64291, Germany
Abstract:Recent commissioning of the Cooler Storage Ring at the Heavy Ion Research Facility in Lanzhou enabled us to conduct high-precision mass measurements at the Institute of Modern Physics in Lanzhou (IMP). In the past few years, mass measurements were performed using the CSRe-based isochronous mass spectrometry employing the fragmentation of the energetic beams of 58Ni, 78Kr, 86Kr, and 112Sn projectiles. Masses of short-lived nuclides on both sides of the stability valley were addressed. Relative mass precision of down to 10?6 ~ 10?7 is routinely achieved. The mass values were used as an input for dedicated nuclear structure and astrophysics studies, providing for instance new insights into the rp-process of nucleosynthesis in X-ray bursts. In this contribution, we briefly review the so far conducted experiments and the main achieved results, as well as outline the plans for future experiments.
Keywords:storage ring  isochronous mass spectrometry  binding energy  isobaric multiplet mass equation  X-ray burst
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