Towards Precision Muonic X-ray Measurements of Charge Radii of Light Nuclei
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Date
2024-03
Publication Type
Journal Article
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Abstract
We, the QUARTET Collaboration, propose an experiment to measure the nuclear charge radii of light elements with up to 20 times higher accuracy. These are essential both for understanding nuclear physics at low energies, and for experimental and theoretical applications in simple atomic systems. Such comparisons advance the understanding of bound-state quantum electrodynamics and are useful for searching for new physics beyond the Standard Model. The energy levels of muonic atoms are highly susceptible to nuclear structure, especially to the mean square charge radius. The radii of the lightest nuclei (with the atomic number, (Formula presented.)) have been determined with high accuracy using laser spectroscopy in muonic atoms, while those of medium mass and above were determined using X-ray spectroscopy with semiconductor detectors. In this communication, we present a new experiment, aiming to obtain precision measurements of the radii of light nuclei (Formula presented.) using single-photon energy measurements with cryogenic microcalorimeters; a quantum-sensing technology capable of high efficiency with outstanding resolution for low-energy X-rays.
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published
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Journal / series
Volume
6 (1)
Pages / Article No.
206 - 215
Publisher
MDPI
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Software
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Subject
muonic atoms; charge radius; X-ray; metallic magnetic calorimeter (MMC); nuclear structure; bound-state quantum electrodynamics (QED); simple atomic systems
Organisational unit
03864 - Kirch, Klaus / Kirch, Klaus
Notes
Funding
22-2 ETH-023 - New detector technology for muonic X-ray spectroscopy and measurement of the absolute nuclear charge radii of Li-6 and Li-7 (ETHZ)