Abstract
The production of very neutron-rich nuclides heavier than fission fragments is an ongoing experimental challenge. Multi-nucleon transfer reactions (MNT) have been suggested as a method to produce these nuclides. By thermalizing the reaction products in gas-filled stopping cells, we can deliver them as cooled high-quality beams to decay, laser and mass spectrometry experiments. High precision mass spectrometry will allow for the first time to universally and unambiguously identify the atomic and proton numbers of the ions produced in MNT reactions. In this way their ground and isomeric state properties can be studied in high-precision measurements. In experiments at IGISOL, Finland and at FRS Ion Catcher, Germany, we have done and will perform broadband measurements of the reaction products, with the aim to improve the understanding of the reaction mechanism and to determine the properties of the ground and isomeric states of the produced nuclides. First results and preparations for upcoming experiments are presented.
Highlights
Heavy neutron-rich nuclei play a key role in the formation of the third abundance peak in the astrophysical rapid neutron capture process [1]
Radioactive ion beams with energies at and slightly above the Coulomb barrier open a wide field for the study of Multi-nucleon transfer (MNT) reactions of heavy nuclei and their application for the synthesis of new exotic heavy and superheavy isotopes [4, 5, 6, 7]
We describe here the two experiments and ways to obtain the information about the reaction process
Summary
Heavy neutron-rich nuclei play a key role in the formation of the third abundance peak in the astrophysical rapid neutron capture process [1]. Experiments at IGISOL, Finland and the FRS Ion Catcher, Germany, have started, with the aim to measure the ground-state properties of the reaction products and to improve the understanding of the reaction mechanism itself. In these experiments production cross section (relative to the elastic cross-section of the beam or target) and isomer-to-ground state ratios can be measured. This information can be used to validate reaction models and to gain knowledge about the spin and excitation transferred in the reaction process. We describe here the two experiments and ways to obtain the information about the reaction process
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