Measurement of the 40Ar(e,e') elastic scattering cross section with a novel gas-jet target
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We report on a measurement of elastic electron scattering on argon performed with a novel cryogenic gas-jet target at the Mainz Microtron accelerator MAMI. The luminosity is estimated with the thermodynamical parameters of the target and by comparison to a calculation in distorted-wave Born approximation. The cross section, measured at new momentum transfers of 1.24 fm-1 and 1.55 fm-1 is in agreement with previous experiments performed with a traditional high-pressure gas target, as well as with modern ab-initio calculations employing state-of-the-art nuclear forces from chiral effective field theory. The nearly background-free measurement highlights the optimal properties of the gas-jet target for elements heavier than hydrogen, enabling new applications in hadron and nuclear physics.
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The European physical journal. A, Hadrons and nuclei, 61, Springer, Berlin ; Heidelberg, 2025, https://doi.org/10.1140/epja/s10050-025-01623-4