Mon·Mar 27, 2023Monday·March 27, 2023

1. 01*

   Magnetic and antimagnetic rotational bands data tables

   J. X. Teng🇨🇳 · K. Y. Ma

   The experimental results of 252 magnetic rotational bands reported in 123 nuclei and 38 antimagnetic rotational bands reported in 27 nuclei are collected and listed in the present work, including energy, spin, parity, magnetic dipole reduced transition probability B(M1), electric quadrupole reduced transition probability B(E2), B(M1)/B(E2) ratio, and the ratio of the dynamic moment of inertia to the electric quadrupole reduced transition probability J(2)/B(E2). Following the presentation of the kinematic moment of inertia J(1), dynamic moment of inertia J(2), and I versus rotational frequency, as well as energy staggering parameter S(I), B(M1), B(E2), B(M1)/B(E2), and J(2)/B(E2) versus I in A 60, 80, 110, 140, and 190 mass regions, a brief discussion is provided. Based on the systematic studies, some nuclei are predicted to be candidates for magnetic or antimagnetic rotation.

   nucl-exphysics.data-anJ.Phys.G(2024)·12 citations
2. 02*

   Liquid solution centrifugation for safe, scalable, and efficient isotope separation

   Joseph F. Wild · Heng Chen · Keyue Liang · Jiayu Liu🇨🇳 · Stephen E. Cox · Alex N. Halliday · Yuan Yang

   A general method of separating isotopes by centrifuging dissolved chemical compounds in a liquid solution is introduced. This technique can be applied to almost all elements and leads to large separation factors. The method has been demonstrated in several isotopic systems including Ca, Mo, O, and Li with single-stage selectivities of 1.046-1.067 per unit mass difference (e.g., 1.434 in 40Ca/48Ca, 1.134 in 16O/18O), which are beyond the capabilities of various conventional methods of isotope enrichment. Equations are derived to model the process and the results agree with those of the experiments. The scalability of the technique has been demonstrated by performing a three-stage enrichment of 48Ca, and the scalability is more broadly supported through analogies to the gas centrifuge, whereby countercurrent centrifugation can further multiply the separation factor by 5-10 times per stage in a continuous process. Optimal centrifuge conditions and solutions can achieve both high-throughput and highly efficient isotope separation.

   nucl-exphysics.app-phphysics.chem-phSci.Adv.(2023)·1 citation
3. 03*

   The Gallium Neutrino Absorption Cross Section and its Uncertainty

   S. R. Elliott🇺🇸 · V.N. Gavrin🇷🇺 · W. C. Haxton🇺🇸 · T. V. Ibragimova🇷🇺 · E. J. Rule🇺🇸

   In the recent Baksan Experiment on Sterile Transitions (BEST), a suppressed rate of neutrino absorption on a gallium target was observed, consistent with earlier results from neutrino source calibrations of the SAGE and GALLEX/GNO solar neutrino experiments. The BEST collaboration, utilizing a 3.4 MCi 51Cr neutrino source, found observed-to-expected counting rates at two very short baselines of R=0.791 plus/minus 0.05 and 0.766 plus/minus 0.05, respectively. Among recent neutrino experiments, BEST is notable for the simplicity of both its neutrino spectrum, line neutrinos from an electron-capture source whose intensity can be measured to a estimated precision of 0.23%, and its absorption cross section, where the precisely known rate of electron capture to the gallium ground state, 71Ge(e,nue)71Ga(g.s.), establishes a minimum value. However, the absorption cross section uncertainty is a common systematic in the BEST, SAGE, and GALLEX/GNO neutrino source experiments. Here we update that cross section, considering a variety of electroweak corrections and the role of transitions to excited states, to establish both a central value and reasonable uncertainty, thereby enabling a more accurate assessment of the statistical significance of the gallium anomalies. Results are given for 51Cr and 37Ar sources. The revised neutrino capture rates are used in a re-evaluation of the BEST and gallium anomalies.

   ↳ nucl-thhep-exhep-phnucl-exPRC(2023)·25 citations
4. 04*

   Phenomenology of double deeply virtual Compton scattering in the era of new experiments

   K. Deja🇵🇱 · V. Martinez-Fernandez🇵🇱 · B. Pire🇫🇷 · P. Sznajder🇵🇱 · J. Wagner🇵🇱

   We revisit the phenomenology of the deep exclusive electroproduction of a lepton pair, i.e. double deeply virtual Compton scattering (DDVCS), in view of new experiments planned in the near future. The importance of DDVCS in the reconstruction of generalized parton distributions (GPDs) in their full kinematic domain is emphasized. Using Kleiss-Stirling spinor techniques, we provide the leading order complex amplitudes for both DDVCS and Bethe-Heithler sub-processes. Such a formulation turns out to be convenient for practical implementation in the PARTONS framework and EpIC Monte Carlo generator that we use in simulation studies.

   ↳ hep-phhep-exnucl-exnucl-thPRD(2023)·53 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.