Detector array for the $^7$H nucleus multi-neutron decay study

TL;DR

This paper describes the development of a detector array designed for detailed study of the five-body decay of the 7H nucleus, including neutron detection and particle identification, at the ACCULINNA-2 separator.

Contribution

The paper introduces a new detector setup with 100 plastic scintillators and specialized detectors for studying 7H decay at a radioactive beam facility.

Findings

Monte Carlo simulations predict detector performance and particle energy distributions.

The setup is optimized for neutron and recoil detection in 7H decay experiments.

Expected luminosity and detection efficiency are estimated for future experiments.

Abstract

Setup fitting the requirements for the detailed study of the five-body decay of the 7H nucleus obtained as a result of the proton transfer from the 8He projectiles to the deuterium target nuclei is being built at the radioactive beam line of ACCULINNA-2 separator in the G.N. Flerov Laboratory of Nuclear Reactions. Described here is the assembly of 100 BC-404 plastic scintillators, intended for neutron detection, the annular Si detector telescope for the 3He recoils, and the detector array providing the $\Delta E$-$E$-TOF registration of 3H nuclei emitted at the 7H decay. Results obtained by the Monte Carlo simulations made for the energy values and flight passes of all these particles are given together with the luminosity expected for the discussed experiments.