Masses, Isomers and Decay Studies for Elemental Nucleosynthesis (MAIDEN)
Main funder
Funder's project number: 771036
Funds granted by main funder (€)
- 1 999 575,00
Funding program
Project timetable
Project start date: 01/06/2018
Project end date: 30/11/2023
Summary
About half of the elements heavier than iron have been produced via the rapid neutron capture process (r process). However, its astrophysical site has remained unknown and is one of the big outstanding questions in physics. Neutrino-driven winds from the proton-neutron star created in core-collapse supernovae were long considered as the most favorable site for the r process but recently neutron-star mergers have become more and more promising candidates. In order to constrain the astrophysical site for the r process, nuclear binding energies of exotic neutron-rich nuclei are needed as they determine the path for the process and therefore strongly effect on the final isotopic abundances. In the project MAIDEN, high-precision mass measurements will be performed for the r process employing novel production and measurement techniques at JYFLTRAP in JYFL-ACCLAB. For accurate measurements, long-living isomeric states have to be resolved from the ground states using state-of-the-art techniques, and the measured states identified via post-trap spectroscopy if in question. Beta-decay properties of neutron-rich nuclei are important for the r-process also as such. MAIDEN will reduce the nuclear data uncertainties related to the r-process calculations. When compared with the observed r-process abundances, this can potentially constrain the astrophysical site for the r-process and lead to a scientific breakthrough.
Principal Investigator
Primary responsible unit
Related publications
- Coulomb excitation of 222Rn (2022) Spagnoletti, P.; et al.; A1; OA
- Direct determination of the atomic mass difference of the pairs 76As−76Se and 155Tb−155Gd rules out 76As and 155 Tb as possible candidates for electron (anti)neutrino mass measurements (2022) Ge, Z.; et al.; A1; OA
- Direct determination of the excitation energy of the quasistable isomer 180mTa (2022) Nesterenko, D. A.; et al.; A1; OA
- First trap-assisted decay spectroscopy of the 81Ge ground state (2022) Delafosse, C.; et al.; A1; OA
- High-precision electron-capture Q value measurement of 111In for electron-neutrino mass determination (2022) Ge, Z.; et al.; A1; OA
- High-precision measurement of a low Q value for allowed β−-decay of 131I related to neutrino mass determination (2022) Eronen, T.; et al.; A1; OA
- High-precision Q-value measurement and nuclear matrix element calculations for the double-β decay of 98Mo (2022) Nesterenko, D. A.; et al.; A1; OA
- Mass measurements towards doubly magic 78Ni : Hydrodynamics versus nuclear mass contribution in core-collapse supernovae (2022) Giraud, S.; et al.; A1; OA
- Nuclear Data and Experiments for Astrophysics (2022) Kankainen, Anu; et al.; A3; 978-3-031-10751-1
- Observation of an ultralow-Q-value electron-capture channel decaying to 75As via a high-precision mass measurement (2022) Ramalho, M.; et al.; A1; OA
