Speaker
Description
Tackling the increasing challenge to determine the mass of isotopes having low production yields and short half-lives, multi-reflection time-of- flight (MRTOF) mass spectrometry has grown from an initially rarely-used technology to the world’s most commonly-used method for measurements with a relative mass precision down to $\delta m/m = 10^{−8}$. This technology has been developed at RIKEN’s RIBF facility for about two decades in combination with gas-filled ion catchers for low-energy access of isotopes produced by the in-flight method.
In the recent years, three independent systems operating at different access points at RIBF, have provided substantial data in the medium- and heavy-mass region of the nuclear chart, reaching out to the superheavy nuclides. Recent achievements like high mass resolving power [1] followed by the development of α/β-TOF detectors [2] and in-MRTOF ion selection have tremendously increased the selectivity of the systems. The combined application allows for background-free identification of the rarest isotopes. In this contribution, I will give a short overview about the success of MRTOF atomic mass measurements using BigRIPS in the recent past [3-5], and report new achievements from 2024. I will discuss the instrumentation plans, with a view to future MRTOF systems in other facilities of East Asia, and the combination of mass measurements with established setups for $\beta-\gamma$ spectroscopy using a through-beam gas cell.
References:
[1] M. Rosenbusch et al., Nucl. Instrum. Meth. A 1047, 167824 (2023).
[2] T. Niwase et al., Theo. Exp. Phys. 2023(3), 031H01 (2023).
[3] S. Iimura et al., Phys. Rev. Lett. 130, 012501 (2023).
[4] D. S. Hou et al., Phys. Rev. C 108, 054312 (2023).
[5] W. Xian, S. Chen et al., Phys. Rev. C. 109, 035804 (2023).
| Email address | marco.rosenbusch@riken.jp |
|---|---|
| Funding Agency | Japanese Society for the Promotion of Science (JSPS) |
| Classification | Ion guide, gas catcher, and beam manipulation techniques |
