Low energy structures in nuclear reactions with 4n in the final state

TL;DR

This paper introduces a reaction model to explain the low-energy peak in four-neutron emission from $^8$He, attributing it to dineutron correlations, and matches experimental missing mass spectra.

Contribution

The paper presents a novel reaction model specifically describing four-neutron emission and its correlation effects in $^8$He reactions.

Findings

Successfully explains the low-energy peak in four-neutron spectra

Reveals dineutron-dineutron correlations as key to the observed phenomena

Matches experimental missing mass spectra data

Abstract

We present a reaction model to describe the fast removal of the $\alpha$-particle core in $^8$He nucleus with eventual emission of four neutrons. The obtained four neutron energy distributions allows to explain the sharp low energy peak observed by studying the missing mass spectra of four neutrons in [Nature Vol. 606, p. 678], as a consequence of dineutron-dineutron correlations.