Antiprotonic atoms have been fundamental in experiments which provide the most precise data on the strong interaction between protons and antiprotons and of the neutron skin of many nuclei thanks to the clean annihilation signal. In most of these experiments, the capture process of low energy antiprotons was done in a dense target leading to a significant suppression of specific transitions between deeply bound levels that are of particular interest. In particular, precise measurements of specific transitions in antiprotonic atoms with Z>2 are sparse. We propose to use the pulsed production scheme developed for antihydrogen and protonium for the formation of cold antiprotonic atoms. This technique has been recently achieved experimentally for the production of antihydrogen at AEgIS. The proposed experiments will have sub-ns synchronization thanks to an improved control and acquisition system. The formation in vacuum guarantees the absence of Stark mixing or annihilation from high n states and together with the sub-ns synchronization would resolve the previous experimental limitations. It will be possible to access the whole chain of the evolution of the system from its formation until annihilation with significantly improved signal-to-background ratio.

Experiments with mid-heavy antiprotonic atoms in AEgIS / G. Kornakov, M. Auzins, B. Bergmann, P. Burian, G. Bonomi, R.S. Brusa, A. Camper, R. Caravita, F. Castelli, P. Cheinet, R. Ciurylo, D. Comparat, G. Consolati, M. Doser, H. Gjersdal, L.T. Gloggler, L. Graczykowski, F. Guatieri, S. Haider, S. Huck, M. Janik, G. Kasprowicz, G. Khatri, L. Klosowski, L. Lappo, C. Malbrunot, S. Mariazzi, G. Nebbia, L. Nowak, D. Nowicka, E. Oswald, D. Pagano, L. Penasa, V. Petracek, M. Piwinski, S. Pospisil, L. Povolo, F. Prelz, S. Rangwala, B. Rienacker, A. Rotondi, O.M. Rohne, H. Sandaker, I. Stekl, D. Tefelski, I.C. Tietje, M. Volponi, T. Wolz, M. Zawada, C. Zimmer, N. Zurlo. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - 380:(2022), pp. 446.1-446.6. (Intervento presentato al 22. convegno Particles and Nuclei International Conference, PANIC tenutosi a Online : 5-10 September nel 2021) [10.22323/1.380.0446].

Experiments with mid-heavy antiprotonic atoms in AEgIS

F. Castelli;F. Prelz;
2022

Abstract

Antiprotonic atoms have been fundamental in experiments which provide the most precise data on the strong interaction between protons and antiprotons and of the neutron skin of many nuclei thanks to the clean annihilation signal. In most of these experiments, the capture process of low energy antiprotons was done in a dense target leading to a significant suppression of specific transitions between deeply bound levels that are of particular interest. In particular, precise measurements of specific transitions in antiprotonic atoms with Z>2 are sparse. We propose to use the pulsed production scheme developed for antihydrogen and protonium for the formation of cold antiprotonic atoms. This technique has been recently achieved experimentally for the production of antihydrogen at AEgIS. The proposed experiments will have sub-ns synchronization thanks to an improved control and acquisition system. The formation in vacuum guarantees the absence of Stark mixing or annihilation from high n states and together with the sub-ns synchronization would resolve the previous experimental limitations. It will be possible to access the whole chain of the evolution of the system from its formation until annihilation with significantly improved signal-to-background ratio.
Settore FIS/04 - Fisica Nucleare e Subnucleare
Settore FIS/01 - Fisica Sperimentale
2022
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/1008088
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