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 and other outputs
- Measurements of binding energies and electromagnetic moments of silver isotopes : A complementary benchmark of density functional theory (2024) de Groote, R. P.; et al.; A1; OA
- Applying machine learning methods for the analysis of two-dimensional mass spectra (2023) Gao, Z.; et al.; A1; OA
- Elucidating the nature of the proton radioactivity and branching ratio on the first proton emitter discovered 53mCo (2023) Sarmiento, Luis G.; et al.; A1; OA
- Further Evidence for Shape Coexistence in 79Znm near Doubly Magic 78Ni (2023) Nies, L.; et al.; A1; OA
- High-precision measurements of low-lying isomeric states in 120–124In with the JYFLTRAP double Penning trap (2023) Nesterenko, D. A.; et al.; A1; OA
- Isomeric yield ratios in proton-induced fission of 238U (2023) Gao, Z.; et al.; A1; OA
- Nuclear Charge Radius of 26mAl and Its Implication for Vud in the Quark Mixing Matrix (2023) Plattner, P.; et al.; A1; OA
- Nuclear structure at the neutron emission threshold and below explored via betadecays of 82,83Ga and 86As (2023) Al Ayoubi, Lama; G4; OA; 978-951-39-9534-8
- Offline commissioning of a new gas cell for the MARA Low-Energy Branch (2023) Zadvornaya, A.; et al.; A1; OA
- Precise mass measurements of radioactive nuclides for astrophysics (2023) Clark, Jason; et al.; A2; OA
