Mon·Jun 8, 2020Monday·June 8, 2020

1. 01*

   Upgrade of IAEA recommended data of selected nuclear reactions for production of PET and SPECT isotopes

   A. Hermanne · F. T. Tárkányi🇭🇺 · A. V. Ignatyuk🇷🇺 · S. Takács🇭🇺 · R. Capote🇦🇹

   An IAEA research project was dedicated to the compilation, evaluation and recommendation of cross-section data for the accelerator production of ${}^{11}$C, ${}^{13}$N, ${}^{15}$O, ${}^{18}$F, ${}^{64}$Cu, and ${}^{124}$I positron-emitting radionuclides clinically used for PET imaging, and for the accelerator production of two gamma emitters, ${}^{81}$Rb and ${}^{123}$I, used in SPECT imaging. Cross sections for 19 charged-particle induced reactions that can be employed for radionuclide accelerator production were evaluated including uncertainties. The resulting reference cross-section data were obtained from Padé fits to selected and corrected experimental data, and integral thick target yields were subsequently deduced. Uncertainties in the fitted results were estimated via a Padé least-squares method with the addition of a 4\% assessed systematic uncertainty to the estimated experimental uncertainty. Experimental data were also compared with theoretical predictions available from the TENDL library. All of the numerical reference cross-section data with their corresponding uncertainties and deduced integral thick target yields are available on-line at the IAEA-NDS medical portal https://www-nds.iaea.org/medportal/ and also at the IAEA-NDS web page https://www-nds.iaea.org/medical/.

   nucl-exnucl-thNucl.Data Sheets(2021)·8 citations
2. 02*

   Excitation of baryonic resonances in stable medium-mass nuclei of Sn

   J L Rodriguez-Sanchez · J Benlliure · E Haettner · C Scheidenberger · J Vargas · Y Ayyad · H Alvarez-Pol · J Atkinson · T Aumann · S Beceiro-Novo · K Boretzky · M Caamaño and 20 other authors

   Isobaric charge-exchange reactions induced by beams of 112Sn have been investigated at the GSI facilities using the fragment separator FRS. The high-resolving power of this spectrometer makes it possible to obtain the isobaric charge-exchange cross sections with an accuracy of 3% and to separate quasi-elastic and inelastic contributions in the missing-energy spectra, in which the inelastic component is associated to the in-medium excitation of baryonic resonances such as the $\Delta$ resonance. We report on the results obtained for the (p,n) and (n,p) channels excited by using different targets that cover a large range in neutron excess.

   nucl-exJ.Phys.Conf.Ser.(2020)·1 citation

* 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.