Measurement of the $^{40}$Ar(e,e$^{\prime}$) elastic scattering cross section with a novel gas-jet target

M. Littich; L. Doria; P. Brand; P. Achenbach; S. Aulenbacher; S. Bacca; J. C. Bernauer; M. Biroth; D. Bonaventura; D. Bosnar; M. Christmann; E. Cline; A. Denig; M. Distler; A. Esser; I. Friščić; J. Geimer; P. Gülker; M. Hoek; P. Klag; A. Khoukaz; M. Lauss; S. Lunkenheimer; T. Manoussos; D. Markus; H. Merkel; M. Mihovilovic; U. Müller; J. Pochodzalla; B. S. Schlimme; C. Sfienti; J. E. Sobczyk; S. Stengel; E. Stephan; M. Thiel; S. Vestrick; A. Wilczek; L. Wilhelm

arXiv · 2503.18965

Measurement of the $^{40}$Ar(e,e$^{\prime}$) elastic scattering cross section with a novel gas-jet target

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Abstract

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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M. Littich, L. Doria, P. Brand, P. Achenbach, S. Aulenbacher, S. Bacca, J. C. Bernauer, M. Biroth, D. Bonaventura, D. Bosnar, M. Christmann, E. Cline, A. Denig, M. Distler, A. Esser, I. Friščić, J. Geimer, P. Gülker, M. Hoek, P. Klag, A. Khoukaz, M. Lauss, S. Lunkenheimer, T. Manoussos, D. Markus, H. Merkel, M. Mihovilovic, U. Müller, J. Pochodzalla, B. S. Schlimme, C. Sfienti, J. E. Sobczyk, S. Stengel, E. Stephan, M. Thiel, S. Vestrick, A. Wilczek, L. Wilhelm. 2025-03-20. Measurement of the $^{40}$Ar(e,e$^{\prime}$) elastic scattering cross section with a novel gas-jet target. https://arxiv.org/abs/2503.18965

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