Subjects: Nuclear Science and Technology >> Radiation Physics and Technology submitted time 2024-05-30
Abstract: DD4hep serves as a generic detector de Conversely, Filmbox~(FBX) stands out as a widely used 3D modeling file format within the 3D software industry. In this paper, we introduce a novel method that can automatically convert complex HEP detector geometries from DD4hep de The feasibility of this method was demonstrated by its application to the DD4hep de The automatic DD4hep--FBX detector conversion interface provides convenience for further development of applications, such as detector design, simulation, visualization, data monitoring, and outreach, in HEP experiments.
Subjects: Physics >> Nuclear Physics submitted time 2023-10-12
Abstract: Information on the decay process of nuclides in the superheavy region is critical in investigating new elements beyond oganesson and the island of stability. This paper presents the application of a random forest algorithm to examine the competition among different decay modes in the superheavy region, including α decay, β− decay, β+ decay, electron capture and spontaneous fission. The observed half-lives and dominant decay mode are well reproduced. The dominant decay mode of 96.9% of the nuclei beyond 212Po is correctly obtained. Further, α decay is predicted to be the dominant decay mode for isotopes in new elements Z = 119–122, except for spontaneous fission in certain even–even elements owing to the increased Coulomb repulsion and odd–even effect. The predicted half-lives demonstrate the existence of a long-lived spontaneous fission island southwest of 298Fl caused by the competition between the fission barrier and Coulomb repulsion. A better understanding of spontaneous fission, particularly beyond 286Fl, is crucial in the search for new elements and the island of stability.
Subjects: Physics >> Nuclear Physics Subjects: Physics >> Geophysics, Astronomy, and Astrophysics submitted time 2023-09-12
Abstract: The neutron capture cross sections (${n, upgamma}$) of Bromine was performed with the time-of-flight (TOF) technique at the Back-n facility of the China Spallation Neutron Source (CSNS). Prompt $ upgamma$-rays originating from neutron-induced capture events were detected by four C${}_6$D${}_6$ detectors. The pulse height weighting technique (PHWT) and the double-bunch unfolding method based on the Bayesian theory were used in the data analysis. To obtain reliable measurement results, background deductions, normalization, and corrections were carefully considered. The multilevel R-matrix Bayesian code SAMMY was used to extract the resonance parameters in the resolved resonance region (RRR). The average cross sections in unresolved resonance region the was obtained from 10 to 400 keV. The experimental results were compared with the data of several evaluated libraries and previous experiments in the resolved and unresolved resonance region. The TALYS code was used to describe the average cross sections in the unresolved resonance region. Astrophysical Maxwell average cross sections (MACSs) of ${}^{79,81}$Br from $ kT $ = 5 to 100 keV was calculated over a sufficiently wide range of neutron energies. At a thermal energy of $kT=30$ keV, the MACS value for ${}^{79}$Br 638$ pm$64 mb is in good agreement with the KADoNiS recommended value. By contrast, the value of 293$ pm$29 mb for ${}^{81}$Br is substantially higher than those of the evaluated database and the KADoNiS recommended value.
Peer Review Status:Awaiting Review