# Interference Effect Between Neutron Direct and Resonance Capture Reactions For Neutron-Rich Nuclei

## TL;DR

This paper investigates the interference effects between compound and direct neutron capture processes in neutron-rich nuclei, revealing significant impacts on cross sections relevant to astrophysical nucleosynthesis.

## Contribution

It introduces a combined calculation method for interference effects in neutron capture, applying it to neutron-rich nuclei and analyzing the impact on Maxwellian averaged cross sections.

## Key findings

- Interference effects are significant near resonances and at low energies for certain nuclei.
- Interference can substantially alter Maxwellian averaged cross sections.
- The study highlights the importance of considering interference in astrophysical models.

## Abstract

Interference effect of neutron capture cross section between the compound and direct processes is investigated. The compound process is calculated by resonance parameters and the direct process by the potential mode. The interference effect is tested for neutron-rich $^{82}$Ge and $^{134}$Sn nuclei relevant to $r$-process and light nucleus $^{13}$C which is neutron poison in the $s$-process and produces long-lived radioactive nucleus $^{14}$C ($T_{1/2}=5700$ y). The interference effects in those nuclei are significant around resonances, and low energy region if $s$-wave neutron direct capture is possible. Maxwellian averaged cross sections at $kT=30$ and $300$ keV are also calculated, and the interference effect changes the Maxwellian averaged capture cross section largely depending on resonance position.