Analysis procedure of the positronium lifetime spectra for the J-PET detector

TL;DR

This paper introduces a new computer program for analyzing positronium lifetime spectra in the J-PET detector, demonstrating comparable performance to standard tools and enabling combined PALS and PET imaging for advanced medical and physics research.

Contribution

A novel analysis procedure and software compatible with J-PET that performs as well as existing solutions like LT 9.0 for lifetime spectra analysis.

Findings

The new program performs as well as LT 9.0 in PALS data analysis.

It is compatible with J-PET, enabling combined PALS and PET.

The iterative fitting procedure is effective for lifetime spectrum analysis.

Abstract

Positron Annihilation Lifetime Spectroscopy (PALS) has shown to be a powerful tool to study the nanostructures of porous materials. Positron Emissions Tomography (PET) are devices allowing imaging of metabolic processes e.g. in human bodies. A newly developed device, the J-PET (Jagiellonian PET), will allow PALS in addition to imaging, thus combining both analyses providing new methods for physics and medicine. In this contribution we present a computer program that is compatible with the J-PET software. We compare its performance with the standard program LT 9.0 by using PALS data from hexane measurements at different temperatures. Our program is based on an iterative procedure, and our fits prove that it performs as good as LT 9.0.