Large Acceptance Spectrometers for Invariant Mass Spectroscopy of Exotic Nuclei and Future Development

TL;DR

This paper reviews large acceptance spectrometers used in invariant mass spectroscopy of exotic nuclei, highlighting recent developments like the SAMURAI facility, addressing neutron detection challenges, and discussing future prospects at new RI-beam facilities.

Contribution

It introduces the key features of large acceptance spectrometers, discusses the SAMURAI facility, and explores future developments for studying exotic nuclei.

Findings

Successful investigation of unbound states of exotic nuclei.

Identification of cross talk issues in neutron detection.

Future perspectives for large acceptance spectrometers at new facilities.

Abstract

Large acceptance spectrometers at in-flight RI separators have played significant roles in investigating the structure of exotic nuclei. Such spectrometers are in particular useful for probing unbound states of exotic nuclei, using invariant mass spectroscopy with reactions at intermediate and high energies. We discuss here the key characteristic features of such spectrometers, by introducing the recently commissioned SAMURAI facility at the RIBF, RIKEN. We also explore the issue of cross talk in the detection of multiple neutrons, which has become crucial for exploring further unbound states and nuclei beyond the neutron drip line. Finally we discuss future perspectives for large acceptance spectrometers at the new-generation RI-beam facilities.