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Systematic study of the de-excitation of neutron-rich nuclei produced in various fission reactions
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Applied Nuclear Physics. Extreme Light Infrastructure - Nuclear Physics.
2019 (English)Conference paper, Oral presentation with published abstract (Refereed)
Abstract [en]

At present, a unique high-intensity, monochromatic photon source is built at ELI-NP in Romania, with photo-fission being one of the designated research areas. Simultaneously with the finalization of the corresponding instrumentation, the future scientific program is being prepared, partly based on on-going fission activities.

In this presentation we intend to give an overview of the current status of the ELI-NP facility with focus put on future photo-fission experiments, of which the study of fission fragment deexcitation might be one of the fields of research. In a not too simplified picture, this deexcitation process takes place in the early stages, i.e. within a few nanoseconds after scission, through the successive emission of prompt neutrons and gamma rays. Concerning the latter, we have contributed in the past years with a number of precise measurements of prompt gamma-ray spectra from various fissioning systems. From those we determined average characteristics like multiplicity, mean energy per photon and total gamma-ray energy released in fission. The obtained results were investigated for their dependences of mass and atomic numbers of the fissioning system as well as the dissipated excitation energy. The purpose of this endeavor was to find a description that allows predicting prompt gamma-ray spectra characteristics for cases that cannot be studied experimentally. We will present results from the latest measurements of prompt fission gamma-ray spectra and give an outlook on our future activities in this field.

Place, publisher, year, edition, pages
2019.
National Category
Subatomic Physics
Research subject
Physics with specialization in Nuclear Physics; Physics with specialization in Applied Nuclear Physics
Identifiers
URN: urn:nbn:se:uu:diva-396980OAI: oai:DiVA.org:uu-396980DiVA, id: diva2:1369619
Conference
Castelvecchio Pascoli, Barga, Italy: Theory-5 Scientific Workshop on Nuclear Fission Dynamics and the Emission of Prompt Neutrons and Gamma Rays, September 24-26, 2019
Note

Invited speaker.

Available from: 2019-11-12 Created: 2019-11-12 Last updated: 2019-11-12

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  • nn-NB
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