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

https://doi.org/10.1140/epja/s10050-025-01623-4

Littich, M.; Doria, L.; Brand, P.; Achenbach, P.; Aulenbacher, S.; Bacca, S.; Bernauer, J_C; Biroth, M.; Bonaventura, D.; Bosnar, D.; et al (July 2025, The European Physical Journal A)

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 $$\hbox {fm}^{-1}$$ ${fm}^{- 1}$ and 1.55 $$\hbox {fm}^{-1}$$ ${fm}^{- 1}$ is in agreement with previous experiments performed with a traditional high-pressure gas target, as well as with modernab-initiocalculations 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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Nuclear density dependence of polarization transfer in quasi-elastic $A (\vec{e}, e^{'} \vec{p})$ reactions

https://doi.org/10.1103/PhysRevC.110.L061302

Kolar, T; Cosyn, W; Giusti, C; Achenbach, P; Ashkenazi, A; Böhm, R; Bosnar, D; Brecelj, T; Christmann, M; Cohen, E O; et al (December 2024, Physical Review C)

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Low- $Q^{2}$ elastic electron-proton scattering using a gas jet target

https://doi.org/10.1103/PhysRevC.106.044610

Wang, Y.; Bernauer, J. C.; Schlimme, B. S.; Achenbach, P.; Aulenbacher, S.; Ball, M.; Biroth, M.; Bonaventura, D.; Bosnar, D.; Brand, P.; et al (October 2022, Physical Review C)

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New Insight in the $Q^{2}$ Dependence of Proton Generalized Polarizabilities

https://doi.org/10.1103/PhysRevLett.123.192302

Beričič, J.; Correa, L.; Benali, M.; Achenbach, P.; Ayerbe Gayoso, C.; Bernauer, J. C.; Blomberg, A.; Böhm, R.; Bosnar, D.; Debenjak, L.; et al (November 2019, Physical Review Letters)
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