Fri·Jun 4, 2021Friday·June 4, 2021

1. 01*

   A new method in the production of Ac-227, Ra-228, Th-228 and U-232 on Thorium target from different perspective for use in Radioisotope Power Systems and Nuclear Batteries

   O. Artun

   We recommended a new method from different perspective for the production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes which have an important potential for use in radioisotope power systems (instead of Pu-238) and nuclear batteries, based on long half-life, high power density and low radiation level. In the method, the production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes were performed by particle accelerators on Th-232 targets, instead of uranium, thorium, actinium series etc. in nuclear reactors. For this aim, to produce Ac-227, Ra-228, Th-228 and U-232 radioisotopes, we calculated cross-section and integral yields curves and simulated activities and yields of product for each reaction process under special conditions, such as during irradiation of 24 h in a particle beam current of 1 mA for the energy range of Eprojectile=1000-1 MeV. The obtained data were compared with experimental EXFOR database and theoretical TENDL database in detail. The cross-section, activity and yields results of each nuclear reaction process were analyzed and discussed in terms of the suitable production of Ac-227, Ra-228, Th-228 and U-232 radioisotopes.

   nucl-exphysics.app-phNucl.Instrum.Meth.B(2022)·0 citations
2. 02*

   Neutron occupancies and single-particle energies across the stable tin isotopes

   S. V. Szwec🇫🇮 · D. K. Sharp🇬🇧 · B. P. Kay🇺🇸 · S. J. Freeman🇬🇧 · J. P. Schiffer🇺🇸 · P. Adsley🇫🇷 · C. Binnersley🇬🇧 · N. de Séréville🇫🇷 · T. Faestermann🇩🇪 · R. F. Garcia Ruiz🇬🇧 · F. Hammache🇫🇷 · R. Hertenberger🇩🇪 and 5 other authors

   The occupancies and vacancies of the valence neutron orbitals across the stable tin isotopic chain from $112\le A\le 124$ have been determined. These were inferred from the cross sections of neutron-adding and -removing reactions. In each case, the reactions were chosen to have good angular-momentum matching for transfer to the low- and high-$\ell$ orbitals present in this valence space. These new data are compared to older systematic studies. The effective single-neutron energies are determined by combining information from energy centroids determined from the adding and removing reactions. Two of the five orbitals are nearly degenerate, below $N=64$, and approximately two MeV more bound than the other three, which are also degenerate.

   nucl-exnucl-thPRC(2021)·15 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.