# Interesting effect of the nd -> p(nn) reaction

## TL;DR

This paper investigates the nd -> p(nn) reaction, highlighting the limitations of simple binding energy models and proposing that the two slow neutrons form an intermediate system with their own Fermi momentum distribution.

## Contribution

It introduces the idea that the two slow neutrons in the final state form an intermediate system with a unique Fermi momentum distribution, explaining observed spectral features.

## Key findings

- Binding energy alone cannot explain the momentum spectrum features.
- The two slow neutrons form an intermediate system with its own Fermi momentum distribution.
- The model better fits the experimental data on secondary proton spectra.

## Abstract

The reaction nd -> p(nn) produce two slow neutrons in the final state instead of deuteron. In the first view we can take into account the binding energy e ~ 2.23 MeV but this approach can not explain all features which are observed in the momentum spectrum of the secondaries protons. We need to suppose that two slow neutrons in the final state form the intermediate system which has own distribution of internal Fermi momentum.