Storage ring mass spectrometry for nuclear structure and astrophysics research

Abstract

In the last two and a half decades ion storage rings have proven to be powerful tools for precision experiments with unstable nuclides in realm of nuclear structure and astrophysics. There are presently three storage ring facilities in the world at which experiments with stored radioactive ions are possible. These are the ESR in GSI, Darmstadt/Germany, the CSRe in IMP, Lanzhou/China, and the R3 storage ring in RIKEN, Saitama/Japan. In this work, an introduction to the facilities is given. Selected characteristic experimental results and their impact in nuclear physics and astrophysics are presented. Planned technical developments and the envisioned future experiments are outlined.

Experimental investigation of the transition energy γt in the isochronous mode of the HIRFL-CSRe

“…Since such nuclei are characterized by low production cross-section and short half-lives, highly efficient and fast mass measurement techniques are required. The IMS based on storage rings is one of such techniques which are realized at in-flight radioactive ion beam facilities [4][5][6]. The IMS is performed today at three heavy-ion storage ring facilities in the world, namely the experimental storage ring ESR at GSI Helmholtz Center in Darmstadt [7][8][9][10], the experimental cooler-storage ring CSRe at the Institute of Modern Physics in Lanzhou [11][12][13][14][15][16][17][18], and the rare-ion storage ring R3 at the RIKEN Nishina Center in Tokyo [19][20][21][22][23][24].…”

Studies at the border between nuclear and atomic physics: Weak decays of highly charged ions

“…However, there are two more storage rings coupled to radioactive ion beam facilities [102]. These are the experimental cooler-storage ring CSRe at Institute of Modern Physics (IMPCAS) in Lanzhou, China and the rare-ion storage ring R3 at RIKEN in Wako, Japan.…”

First application of combined isochronous and Schottky mass spectrometry: Half-lives of fully ionized Cr24+49 and Fe26+<

“…Owing to the development of high-sensitivity non-destructive Schottky detectors [24][25][26], which are capable to detect single stored heavy highly-charged ions within a few ten milliseconds, it became attractive to develop an isochronous Schottky mass spectrometry with time-resolved Schottky detection technique for halflife measurements of HCIs. Furthermore, this is a basis for half-life measurements of exotic nuclides foreseen at the future storage ring projects at FAIR in Darmstadt and HIAF in Huizhou [27,28]. We note, that within the later projects further developments of Schottky detectors to include positionsensitivity has been proposed [29,30].…”