The PANDORA project: an experimental setup for measuring in-plasma β-decays of astrophysical interest
1 INFN-Laboratori Nazionali del Sud, Catania, Italy
2 INFN, Sezione di Perugia, Perugia, Italy
3 ENEA, Bologna, Italy
4 INFN, Sezione di Bologna, Italy
5 Universita degli Studi di Catania, Catania, Italy
6 INFN-Laboratori Nazionali di Legnaro, Legnaro (PD), Italy
Published online: 14 January 2020
Experiments performed on Storage Rings have shown that lifetimes of beta-radionuclides can change dramatically as a function of theionization state. PANDORA (Plasmas for Astrophysics, Nuclear Decay Observation and Radiation for Archaeometry) aims at measuring, for the first time, nuclear β-decay rates in stellar-like conditions, especially for radionuclides involved in nuclear-astrophysics processes (BBN, s- processing, CosmoChronometers, Early Solar System formation). Compact magnetic plasma traps, where plasmas reach density ne~10n-1014 cm-3, and temperature Te~0.1-30 keV, are suitable for such studies. The decay rates can be measured as a function of the charge state distribution of the inplasma ions. The collaboration is now designing the plasma trap able to reach the needed plasma densities, temperatures and charge states distributions. A first list of radioisotopes, including tens of physics cases of potential interest is now available. Possible physics cases include, among the others, 2°4Tl, 63Ni, 6°Co, 171Tm, 147Pm, 85Kr, 176Lu and the pairs 187Re-187Os and 87Sr-87Rb, which play a crucial role as cosmo-clock. Physics cases are now under evaluation in terms of lifetime measurements feasibility in a plasma trap.
© The Authors, published by EDP Sciences, 2020
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