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MAIDEN

Masses, isomers and decay studies for elemental nucleosynthesis

CoordinatorUniversity of Jyväskylä
Grant period2018-06-01 - 2023-11-30
Funding bodyEuropean Union
Call numberERC-2017-COG
Grant number771036
IdentifierG:(EU-Grant)771036

Note: About half of the elements heavier than iron have been produced via the rapid neutron capture process, the r process. Its astrophysical site has been one of the biggest outstanding questions in physics. Neutrino-driven winds from proto-neutron stars created in core-collapse supernovae were long considered as the most favourable site for the r process. Recently, neutron-star mergers have become the most promising candidates, and new exciting observations from these compact objects, such as gravitational waves, are expected in the coming years. In order to constrain the astrophysical site for the r process, nuclear binding energies (i.e. masses) of exotic neutron-rich nuclei are needed because they determine the path for the process and therefore have a direct effect on the final isotopic abundances. In this project, high-precision mass measurements will be performed in three regions relevant for the r process, employing novel production and measurement techniques at the IGISOL facility in JYFL-ACCLAB. Long-living isomeric states, which also play a role in the r process, will be resolved from the ground states to obtain accurate mass values. Post-trap decay spectroscopy will be performed to confirm which state has been measured in order to avoid systematic uncertainties in the mass values. The new data will be compared with theoretical mass models and included in r-process calculations performed for various astrophysical sites. MAIDEN will advance our knowledge of nuclear structure far from stability and reduce nuclear data uncertainties in the r-process calculations, which can potentially constrain the astrophysical site for the r process and lead to a scientific breakthrough in our understanding of the origin of elements heavier than iron in the universe.
     

Recent Publications

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Direct mass measurement of $^{93}Pd$ and implications for the isomer structures in $^{94}Ag$ : Tracing the two-proton decay branch
Physical review research 7(4), L042022 () [10.1103/mhhn-kmgx] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Prominent Bump in the Two-Neutron Separation Energies of Neutron-Rich Lanthanum Isotopes Revealed by High-Precision Mass Spectrometry
Physical review letters 134(4), 042501 () [10.1103/PhysRevLett.134.042501] BibTeX | EndNote: XML, Text | RIS

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β -delayed neutron spectroscopy of $^{85 , 86}$As with MONSTER at IGISOL
Physical review / C 111(4), 044312 () [10.1103/PhysRevC.111.044312] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Overview of High-Performance Timing and Position-Sensitive MCP Detectors Utilizing Secondary Electron Emission for Mass Measurements of Exotic Nuclei at Nuclear Physics Facilities
Sensors 24(22), 7261 () [10.3390/s24227261] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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Probing the $N=104$ midshell region for the $r$ process via precision mass spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double Penning trap
Physical review / C 110(4), 045809 () [10.1103/PhysRevC.110.045809] BibTeX | EndNote: XML, Text | RIS

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Study of transfer-like fragments for $^{136}Xe$+$^{209} Bi/^{176}Yb$: Prospect for multinucleon transfer reactions at IGISOL
EPJ Web of Conferences, 306, 01036
Fusion23 Conference, ShizuokaShizuoka, Japan, 19 Nov 2023 - 24 Nov 20232023-11-192023-11-24 Les Ulis : EDP Sciences, The European physical journal / Web of Conferences 306, 01036 pp. () [10.1051/epjconf/202430601036] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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High-Precision Mass Measurements of Neutron Deficient Silver Isotopes Probe the Robustness of the N=50 Shell Closure
Physical review letters 133(13), 132503 () [10.1103/PhysRevLett.133.132503] BibTeX | EndNote: XML, Text | RIS

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First investigation on the isomeric ratio in multinucleon transfer reactions: Entrance channel effects on the spin distribution
Physics letters / B 853, 138654 () [10.1016/j.physletb.2024.138654] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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VADER: A novel decay station for actinide spectroscopy
Nuclear instruments & methods in physics research / B 540, 148 - 150 () [10.1016/j.nimb.2023.04.021] OpenAccess  Download fulltext Files BibTeX | EndNote: XML, Text | RIS

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High-precision Penning-trap mass measurements of Cd and In isotopes at JYFLTRAP remove the fluctuations in the two-neutron separation energies
Physical review / C 108(6), 064302 () [10.1103/PhysRevC.108.064302] BibTeX | EndNote: XML, Text | RIS

All known publications ...
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 Record created 2018-05-26, last modified 2023-02-12
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