Let us hope that future research unravels many more mysteries surrounding nuclei! In addition, the detailed investigation of multi-neutron correlations and the study of other exotic systems now become possible with the multi-neutron-decay spectroscopy technique utilized here. The present findings enhance our understanding of nuclear structure by offering new insights, especially for extremely neutron-rich nuclei. "This result suggests that the 'island of inversion,' whereby the energy gap between neutron orbitals weakens or vanishes, extends beyond the fluorine isotopes 28F and 29F into the oxygen isotopes," explains Dr. "The researchers also investigated the cross-section for the production of 28O from the 29F beam, finding it to be consistent with 28O not exhibiting a closed N = 20 shell structure. "Specifically, the statistical coupled-cluster calculations suggested that the energies of 27O and 28O can provide valuable constraints for the interactions considered in such ab initio approaches," points out Dr. Most theoretical approaches predicted higher energies for both isotopes. They found that both 27O and 28O exist as narrow low-lying resonances and compared their decay energies to the results of sophisticated theoretical models-a large-scale shell model calculation and a newly developed statistical approach-based on effective field theories of quantum chromodynamics. The researchers observed these isotopes and studied their properties by directly detecting their decay products. Proton-induced nucleon knockout reactions from a high-energy 29F beam generated the neutron-unbound isotopes 27O and 28O. The study's success was enabled by the capabilities of the RIKEN RI Beam Factory, which could produce intense beams of unstable nuclei coupled to an active target of thick liquid hydrogen and multi-neutron detection arrays. The nucleus 28O, which consists of 8 protons and 20 neutrons (N), is of significant interest as it is expected to be one of the few 'doubly magic' nuclei in the standard shell-model picture of nuclear structure. Now, in a new study published in available in Nature, an international collaboration of researchers led by Yosuke Kondo, an Assistant Professor at the Department of Physics at Tokyo Institute of Technology, reports the first observation of two such isotopes-oxygen-28 ( 28O) and oxygen-27 ( 27O)-through their decay into oxygen-24 with four and three neutrons, respectively. ![]() These isotopes exist as very short-lived resonances, decaying through spontaneous neutron emission. In nuclear physics, neutron-rich isotopes, especially the light ones with neutron-to-proton ratio significantly different from that of stable nuclei, provide stringent tests of modern nuclear structure theories. ![]() The study of physical systems under extreme conditions offers valuable insights into their organization and structure.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |