Study and validation of a new "3D Calorimetry" of hot nuclei with the HIPSE event generator

TL;DR

This paper evaluates a new 3D calorimetry method for hot nuclei using the HIPSE event generator and INDRA simulation, aiming to improve the accuracy of Quasi-Projectile characterization in nuclear reactions.

Contribution

It provides a comprehensive validation and quantification of the 3D calorimetry technique for hot nuclei with simulated data, establishing its limits and effectiveness.

Findings

Quantitative assessment of 3D calorimetry accuracy

Validation of the method using HIPSE and INDRA simulations

Identification of the method's limitations in nuclear reaction analysis

Abstract

In nuclear thermodynamics, the determination of the excitation energy of hot nuclei is a fundamental experimental problem. Instrumental physicists have been trying to solve this problem for several years by building the most exhaustive 4Pi detector arrays and perfecting their calorimetry techniques. In a recent paper, a proposal for a new calorimetry, called "3D calorimetry", was made. It tries to optimize the separation between the particles and fragments emitted by the Quasi-Projectile and the other possible contributions. This can be achieved by determining the experimental probability for a given nucleus of a nuclear reaction to be emitted by the Quasi-Projectile. It has been developed for the INDRA data. In the present work, we wanted to dissect and validate this new method of characterization of a hot Quasi-Projectile. So we tried to understand and control it completely to determine these limits. Using the HIPSE event generator and a software simulating the functioning of INDRA, we were able to achieve this goal and provide a quantitative estimation of the quality of the QP characterization.