MMC Array to Study X-ray Transitions in Muonic Atoms
Abstract
The QUARTET collaboration aims to significantly improve the precision of the absolute nuclear charge radii of light nuclei from Li to Ne by using an array of metallic magnetic calorimeters to perform high-precision X-ray spectroscopy of low-lying states in muonic atoms. A proof-of-principle measurement with lithium, beryllium and boron is planned for fall 2023 at the Paul Scherrer Institute. We discuss the performance achieved with the maXs-30 detector module to be used. To place the detector close to the target chamber where the muon beam will impact the material under study, we have developed a new dilution refrigerator sidearm. We further discuss the expected efficiency given the transparency of the X-ray windows and the quantum efficiency of the detector. The expected muonic X-ray rate combined with the high resolving power and detection efficiency of the detector suggest that QUARTET will be able to study the de-excitation of light muonic atoms at an unprecedented level, increasing the relative energy resolution by up to a factor of 20 compared to conventional detector techniques.
Cite
@article{arxiv.2311.12014,
title = {MMC Array to Study X-ray Transitions in Muonic Atoms},
author = {Daniel Unger and Andreas Abeln and Thomas Elias Cocolios and Ofir Eizenberg and Christian Enss and Andreas Fleischmann and Loredana Gastaldo and César Godinho and Michael Heines and Daniel Hengstler and Paul Indelicato and Ashish Jadhav and Daniel Kreuzberger and Klaus Kirch and Andreas Knecht and Jorge Machado and Ben Ohayon and Nancy Paul and Randolf Pohl and Katharina von Schoeler and Stergiani Marina Vogiatzi and Frederik Wauters},
journal= {arXiv preprint arXiv:2311.12014},
year = {2024}
}