Project description
Research to shed light on how atom fragments spin in nuclear fission
Nuclear fission, the process of splitting an atomic nucleus, is crucial in science but still puzzles nuclear physicists 85 years after its discovery. A crucial piece of this puzzle is to understand the angular momentum of atom fragments after they split in fission, which affects neutron and photon emissions during de-excitation. Limited understanding of this phenomenon leads to reliance on simplified, occasionally inaccurate data. Funded by the Marie Skłodowska-Curie Actions programme, the AMPLIFI project plans to use nuclear density functional theory to predict angular momentum distributions. Combining symmetry-restoration techniques and the time-dependent generator coordinate method, researchers will seek to understand how fragments spin when atoms of 239Pu and 235U split after being hit by neutrons. The team will also create a first-of-its-kind database to improve fission models.
Objective
Nuclear fission, the splitting of an atomic nucleus into two or more fragments, plays an essential role in both applied and fundamental science. However, even 85 years after its discovery, it remains a challenging puzzle for nuclear theorists. A crucial piece of this puzzle is the angular momentum of fission fragments, a measure of fragments' rotation that has a substantial impact on the emission of neutrons and photons during the deexcitation process. Recent research on the subject has reignited a long-standing debate on several fundamental questions. One key problem involves establishing a comprehensive microscopic theory of angular momentum distributions for the full range of fragments' masses and charges. These distributions are a major input in the data evaluation process employed to generate the large nuclear data libraries used in fundamental science and nuclear technology. However, due to the lack of a comprehensive theory, those evaluations still rely on simplified and occasionally inaccurate phenomenological inputs. The principal aim of this project is to predict angular momentum distributions using state-of-the-art nuclear density functional theory. Combining symmetry-restoration techniques and the time-dependent generator coordinate method, we will compute angular momentum distributions in fragments for the neutron-induced fission of two crucial actinides, 239Pu and 235U. Subsequently, we will explore the impact of nuclear excitation on these distributions by extending the finite-temperature formalism to fission fragments. The resulting database, first of its kind, will encompass microscopic angular momentum distributions as functions of the incident neutron energy and the nuclear excitation energy. Finally, we will evaluate the influence of these distributions on predicted fission spectra, employing the Hauser-Feschbach simulator YAHFC, thus paving the way for fission modeling based on microscopic theory.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences computer and information sciences databases
- natural sciences physical sciences theoretical physics particle physics photons
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Keywords
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Project’s keywords as indicated by the project coordinator. Not to be confused with the EuroSciVoc taxonomy (Fields of science)
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
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HORIZON.1.2 - Marie Skłodowska-Curie Actions (MSCA)
MAIN PROGRAMME
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Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships
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Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
(opens in new window) HORIZON-MSCA-2023-PF-01
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Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.
10000 ZAGREB
Croatia
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.