Publication: Unperturbed inverse kinematics nucleon knockout measurements with a carbon beam
Дата
2021
Авторы
Patsyuk, M.
Kahlbow, J.
Laskaris, G.
Duer, M.
Atkin, E.
Barbashina, N.
Bolozdynya, A.
Fillipov, K.
Finogeev, D.
Galavanov, A.
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© 2021, The Author(s), under exclusive licence to Springer Nature Limited part of Springer Nature.Particle knockout scattering experiments1,2 are fundamental for mapping the structure of atomic nuclei2–6, but their interpretation is often complicated by initial- and final-state interactions of the incoming and scattered particles1,2,7–9. Such interactions lead to reduction in the scattered particle flux and distort their kinematics. Here we overcome this limitation by measuring the quasi-free scattering of 48 GeV c–112C ions from hydrogen. The distribution of single protons is studied by detecting two protons at large angles in coincidence with an intact 11B nucleus. The 11B detection suppresses the otherwise large distortions of reconstructed single-proton distributions induced by initial- and final-state interactions. By further detecting residual 10B and 10Be nuclei, we also identified short-range correlated nucleon–nucleon pairs9–13 and provide direct experimental evidence for separation of the pair wavefunction from that of the residual many-body nuclear system9,14. All measured reactions are well described by theoretical calculations that include no distortions from the initial- and final-state interactions. Our results showcase the ability to study the short-distance structure of short-lived radioactive nuclei at the forthcoming Facility for Antiproton and Ion Research (FAIR)15 and Facility for Rare Isotope Beams (FRIB)16 facilities, which is relevant for understanding the structure and properties of nuclei far from stability and the formation of visible matter in the Universe.
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Unperturbed inverse kinematics nucleon knockout measurements with a carbon beam / Patsyuk, M. [et al.] // Nature Physics. - 2021. - 17. - № 6. - P. 693-699. - 10.1038/s41567-021-01193-4