Abstract
Storage ring mass spectrometry allows for simultaneous measurements of masses of a large amount of nuclides. Two measurement techniques, isochronous and Schottky mass spectrometry, are applied. The clear advantage of the storage ring mass spectrometry is that only a few particles are required to measure their mass with high accuracy. In this contribution we address the most recent results obtained at the two presently operating facilities, namely the Experimental Storage Ring (ESR) in Darmstadt and the Experimental Cooler-Storage Ring (CSRe) in Lanzhou.
Highlights
It is well known in physics that the total energy of a closed system is its fundamental constant which results from all interactions and correlations of the constituent particles
Published under licence by IOP Publishing Ltd experimental techniques are routinely used. These are the Penning trap [1] and storage ring mass spectrometry [8]. In this contribution we briefly review recent results obtained with storage ring mass spectrometry
The Cooler-Storage Ring (CSRe) [13] has a mean circumference of 128.8 m and a maximal magnetic rigidity of 8.4 Tm. It has eight 45 bending sections, each of which consists of two dipole magnets. Both storage rings operate under ultra-high vacuum (UHV) conditions of about 10 11 mbar, which inevitably requires that in-ring instrumentations are bakeable to about 150 200 C and have to be made of UHV materials
Summary
It is well known in physics that the total energy of a closed system is its fundamental constant which results from all interactions and correlations of the constituent particles In this respect nuclei are fascinating many-body objects in which the strong, weak, and electromagnetic fundamental interactions take place by acting between two types of nucleons, protons and neutrons. That many of nuclei, which for instance are involved in the rapid-neutron capture process (r-process), are not accessible at the present radioactive ion beam facilities and their masses have to be obtained from theory Such nuclides can be characterised by a strong asymmetry of their proton-to-neutron ratio and can reveal unexpected nuclear structure e↵ects. New experimental nuclear masses are essential to test and improve nuclear models These nuclei are di cult to investigate due to their small production cross-sections and short lifetimes (see, e.g., [5]).
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