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- Ovejas, J. D., et al.
(author)
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Halo effects in the low-energy scattering of 15 C with heavy targets
- 2020
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In: Acta Physica Polonica, Series B.. - 1509-5770 .- 0587-4254. ; 51:3, s. 731-736
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Journal article (peer-reviewed)abstract
- The neutron-rich carbon isotope 15C was postulated to be a halo nucleus (Sn = 1215 keV, S2n = 9395 keV) according to different high-energy experiments. If so, it would be the only halo nucleus exhibiting a "pure" s-wave structure of the ground state. At low collision energies, the effect of this halo structure should manifest as a strong absorption pattern in the angular distribution of the elastic cross section, with a total suppression of the nuclear rainbow due to the large neutron transfer and breakup probabilities, enhanced by the halo configuration. The IS619 experiment, carried out at the HIE-ISOLDE facility at CERN (Switzerland), is the first dynamical study of this nucleus at energies around the Coulomb barrier. It aims to probe the halo structure via the measurement of the elastic cross section on a high-Z 208Pb target. Preliminary results of the elastic cross section are discussed and compared to Optical Model calculations.
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- Ovejas, J. D., et al.
(author)
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Study of the scattering of 15C at energies around the Coulomb barrier
- 2020
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In: Journal of Physics: Conference Series. - : IOP Publishing. - 1742-6588 .- 1742-6596. ; 1643:1
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Conference paper (peer-reviewed)abstract
- The neutron rich carbon isotope 15C is the only known case of an almost "pure"2s1/2 single-neutron halo ground state configuration. At collision energies around the Coulomb barrier the reaction dynamics is expected to be dominated by single neutron transfer and breakup. To investigate these effects, we have measured the scattering of 15C with a 208Pb target at 65 MeV at the HIE-ISOLDE facility in CERN (Geneva, Switzerland). The preliminary data demonstrates the presence of a strong long-range absorption pattern in the angular distribution of the elastic cross section. The results are discussed in the framework of Optical Model calculations.
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- Rehbohm, T., et al.
(author)
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Integrated Security Management of Public and Private Sector for Critical Infrastructures : Problem Investigation
- 2022
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In: Business Information Systems Workshops. - Cham : Springer. - 9783031042164 - 9783031042157 ; , s. 291-303
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Conference paper (peer-reviewed)abstract
- The interaction between security management in public and private organisations includes complex challenges. In particular in critical infrastructure sectors, there is a need for instruments that enable the holistic and overarching management of private and public providers. Cross-organisational structures and processes should be defined, but are difficult to establish in federal governmental structures due to different legislative levels and scopes. The paper investigates this challenge using Germany and the Free Hanseatic City of Bremen as example. The study proposes the development of an “Enterprise Architecture Framework” integrating and overarching the organizational structurers for both, a federal state, its municipalities and the (private) critical infrastructure providers in these municipalities. The main contributions of this paper are based on the results of an interview study. The interview partners were representatives of enterprises and public bodies covered by the federal IT security regulations. The contribution of the paper is the identification of security management challenges for services of general interest and how to increase the resilience of public service providers. Cybersecurity management in the context of public institutions is in focus.
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