https://doi.org/10.1140/epja/s10050-021-00422-x
Regular Article
Low-energy excitations and 
-decay branchings in 
Sn via (p,p’) at 
1
Institut für Kernphysik, Universität zu Köln, 50937, Köln, Germany
2
Department of Physics, Florida State University, 32306, Tallahassee, FL, USA
3
Institute for Energy and Climate Research, IEK-8: Troposphere, Forschungszentrum Jülich GmbH, 52428, Jülich, Germany
Received:
18
December
2020
Accepted:
11
March
2021
Published online:
15
June
2021
The dipole response of the proton-magic nucleus 
was previously investigated with electromagnetic and hadronic probes. Different responses were observed revealing the so-called isospin splitting of the Pygmy Dipole Resonance (PDR). Here we present the results of a new study of using inelastic proton scattering at low energies to test an additional probe possibly exciting states of the PDR. The response to the new probe as well as the -decay behavior of excited states were studied. The (p,p’) experiment was performed at 
using the combined spectroscopy setup SONIC@HORUS at the Tandem accelerator of the University of Cologne. Proton- coincidences were recorded, enabling a state-to-state analysis due to the excellent energy resolution for both particles and rays. 
states in the PDR region were populated in the present inelastic proton scattering experiment. Many -decay branching ratios could be determined.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
