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
- Decay of the key 92-keV resonance in the 25Mg(p,γ) reaction to the ground and isomeric states of the cosmic γ-ray emitter 26Al (2021) Kankainen, A.; et al.; A1; OA
- Direct measurement of the mass difference of 72As−72Ge rules out 72As as a promising β-decay candidate to determine the neutrino mass (2021) Ge, Z.; et al.; A1; OA
- Evidence of a sudden increase in the nuclear size of proton-rich silver-96 (2021) Reponen, M.; et al.; A1; OA
- First β-decay spectroscopy of 135In and new β-decay branches of 134In (2021) Piersa-Siłkowska, M.; et al.; A1; OA
- Large Shape Staggering in Neutron-Deficient Bi Isotopes (2021) Barzakh, A.; et al.; A1; OA
- Mass measurements of As, Se, and Br nuclei, and their implication on the proton-neutron interaction strength toward the N=Z line (2021) Mardor, I.; et al.; A1; OA
- New β-decaying state in 214B (2021) Andel, B.; et al.; A1; OA
- Exploring the mass surface near the rare-earth abundance peak via precision mass measurements at JYFLTRAP (2020) Vilen, M.; et al.; A1; OA
- High-precision mass measurement of 168Yb for verification of nonlinear isotope shift (2020) Nesterenko, D.A.; et al.; A1; OA
- High-Precision Q-Value Measurement Confirms the Potential of 135Cs for Absolute Antineutrino Mass Scale Determination (2020) de Roubin, A.; et al.; A1; OA
