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Project List » Complementary Investigations for Photon beams - High-Energy nuclear Resonant States with charged particle probes |
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Complementary Investigations for Photon beams - High-Energy nuclear Resonant States with charged particle probes
www.nipne.ro/proiecte/pn4/2-projects.html
Acronym: CIPHERS
Contracting Authority: IFA
Number / Date of the contract: ELI-RO/RDI/2024-002 / 2024-07-10
Project Manager: Par-Anders Soderstrom
Partners:
Starting date / finishing date: 2024-07-10 / 2027-03-31
Project value: 4000000 RON
Abstract: Two of the main fundamental science topics to be explored with the gamma-beam system VEGA at ELI-NP are the nuclear gamma-ray strength functions and the nuclear level densities above and around the neutron threshold. In these regions of nuclear excitation energy, the quasi-continuum and continuum regions where the nucleus exhibits large-amplitude collective structures like the Giant Dipole Resonance (GDR) and the Pygmy Dipole Resonance (PDR), measurements of decay properties are, in general, a challenging task, and while methods exist for extracting either the gamma-ray strength or the level density, they are complex and often suffer from systematic model dependencies. One of the main focal points of the ELI-NP TDRs for GANT and NRF for the gamma-ray beam is the study of PDR and GDR excitations with high precision. As the physics phenomena in these TDRs are complex, theoretically and experimentally, more than one single measurement approach or one single experiment is usually required to describe the underlying structures fully. Thus, for these ELI-NP TDRs to be realized with the highest possible scientific impact, complementary experiments can be performed at the neighbouring facilities of ELI-NP - the 9MV Tandem facility - using charged particle probes and utilizing ELI-NP experimental equipment for in-depth physics studies of experimental methods and complement the flagship experiments at ELI-NP, as well as at other facilities abroad. In this project, we propose constructing a complete experimental setup, preparatory versions of which were successfully tested in 2022, 2023, and 2024. We also experimentally investigate selected key cases with complementary data with gamma-ray beams approved.
Objectives: 1. A complete experimental setup at the 9MV Tandem facilities of IFIN-HH
2. A Geant4 code to be distributed publicly for consistent results between experiments and research groups
3. Data analysis of the preparatory experiments
4. Measurement of transition probabilities of discrete states
5. Development of a fast charged-particle tagging detector
6. Experimental studies of the continuum and quasi-continuum
7. Charged particle decay in hot nuclei from fusion-evaporation reactions
8. Complementary experiments at external facilities.
THE STAGES OF THE PROJECT AND DELIVERY DATES
RESULTS
PUBLISHED ARTICLES
RESEARCH TEAM
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