Simulations and analysis tools for charge-exchange $(d,{}^{2}\text{He})$ reactions in inverse kinematics with the AT-TPC

TL;DR

This paper presents a simulation and analysis software for charge-exchange reactions in inverse kinematics using the AT-TPC, enabling better understanding and benchmarking of experimental data for nuclear physics research.

Contribution

The development of a comprehensive simulation and analysis toolkit based on ATTPCROOT for charge-exchange reactions in inverse kinematics with the AT-TPC.

Findings

Realistic detector response simulation for charge-exchange reactions.

Feasibility of using beam-like particle coincidences for reaction channel identification.

Investigation of space-charge effects and correction methods in track reconstruction.

Abstract

Charge-exchange $(d,{}^{2}\text{He})$ reactions in inverse kinematics at intermediate energies are a very promising method to investigate the Gamow-Teller transition strength in unstable nuclei. A simulation and analysis software based on the $\rm{\scriptsize ATTPCROOT}$ package was developed to study these type of reactions with the active-target time projection chamber (AT-TPC). The simulation routines provide a realistic detector response that can be used to understand and benchmark experimental data. Analysis tools and correction routines can be developed and tested from simulations in $\rm{\scriptsize ATTPCROOT}$, because they are processed in the same way as the real data. In particular, we study the feasibility of using coincidences with beam-like particles to unambiguously identify the $(d,{}^{2}\text{He})$ reaction channel, and to develop a kinematic fitting routine for future applications. More technically, the impact of space-charge effects in the track reconstruction, and a possible correction method are investigated in detail. This analysis and simulation package constitutes an essential part of the software development for the fast-beams program with the AT-TPC.