T(T,2n)4He and3He(3He,2p)4He: The Reaction Mechanism from Solar Energies to 10 MeV

A.D Bacher,M Gatu Johnson,J.A Frenje,G.M Hale,C.R Brune,D.B Sayre

doi:10.1051/epjconf/201611303003

Abstract

We have studied the energy dependence of the reaction mechanism of the T(t,2n)4 He reaction at stellar energies and of its charge symmetric analog reaction 3 He(3 He,2p)4 He at energies up 10 MeV. We find that the reaction mechanism changes dramatically over this energy range in part due to the interference of the two identical fermions in the three-body final state.

Highlights

This contribution describes a study of the Charge Symmetric reactions T+T and 3He+3He carried out at the laser facilities OMEGA and the National Ignition Facility (NIF) and at the tandem accelerator facility at Cal Tech
At OMEGA and the NIF the neutron spectra were determined by very fast Neutron Time-ofFlight detectors (TOF) and by a Medium Resolution Spectrometer (MRS) with a CD2 foil to convert the neutrons into deuterons which could be momentum-analyzed in the magnetic field
At Cal Tech the proton energy spectra were determined by a pair of solid-state detectors that used standard particle identification techniques to separate the charge-one protons from the charge-two alpha particles

Summary

Introduction

This contribution describes a study of the Charge Symmetric reactions T+T and 3He+3He carried out at the laser facilities OMEGA and the National Ignition Facility (NIF) and at the tandem accelerator facility at Cal Tech. At OMEGA and the NIF the neutron spectra were determined by very fast Neutron Time-ofFlight detectors (TOF) and by a Medium Resolution Spectrometer (MRS) with a CD2 foil to convert the neutrons into deuterons which could be momentum-analyzed in the magnetic field. The properties of these detectors have been determined by previous measurements of n+D and D+T reactions.

Results

Conclusion