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
Follow-up groups
Profiling area: Accelerator and Subatomic Physics (University of Jyväskylä JYU)
Related publications and other outputs
- 𝛽 decay of the ground state and of a low-lying isomer in 216Bi (2024) IDS Collaboration; A1; OA
- Detailed structure of 131Sn populated in the 𝛽 decay of isomerically purified 131In states (2024) Benito, J.; et al.; A1; OA
- Direct high-precision measurement of the mass difference of 77As–77Se related to neutrino mass determination (2024) Ge, Z.; et al.; A1; OA
- Fast-timing Investigation of A=128 Isobars Populated in the β-decay of 128Cd (2024) Llanos-Expósito, M.; et al.; A4; OA
- First investigation on the isomeric ratio in multinucleon transfer reactions : Entrance channel effects on the spin distribution (2024) Kumar, D.; et al.; A1; OA
- First Study of the 139Ba(𝑛,𝛾)140Ba Reaction to Constrain the Conditions for the Astrophysical 𝑖 Process (2024) Spyrou, A.; et al.; A1; OA
- High-Precision Mass Measurements of Neutron Deficient Silver Isotopes Probe the Robustness of the N=50 Shell Closure (2024) Ge, Zhuang; et al.; A1; OA
- High-precision measurement of the atomic mass of 84Sr and implications to isotope shift studies (2024) Ge, Zhuang; et al.; A1; OA
- Isospin symmetry breaking in the T=1, A=70 triplet (2024) Zimba, G. L.; et al.; A1; OA
- Long-sought isomer turns out to be the ground state of 76Cu (2024) Canete, L.; et al.; A1; OA
