Masses, Isomers and Decay Studies for Elemental Nucleosynthesis (MAIDEN)

Main funder

Funder's project number771036

Funds granted by main funder (€)

  • 1 999 575,00

Funding program

Project timetable

Project start date01/06/2018

Project end date30/11/2023


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 areaAccelerator and Subatomic Physics (University of Jyväskylä JYU)

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Last updated on 2024-10-06 at 07:55