Wed·Oct 19, 2022Wednesday·October 19, 2022

1. 01*

   Collision-Induced Dissociation at TRIUMF's Ion Trap for Atomic and Nuclear science

   A. Jacobs🇨🇦 · C. Andreoiu🇨🇦 · J. Bergmann🇩🇪 · T. Brunner🇨🇦 · T. Dickel🇩🇪 · I. Dillmann🇨🇦 · E. Dunling🇨🇦 · J. Flowerdew · L. Graham · G. Gwinner🇨🇦 · Z. Hockenbery🇨🇦 · B. Kootte🇨🇦 and 17 other authors

   The performance of high-precision mass spectrometry of radioactive isotopes can often be hindered by large amounts of contamination, including molecular species, stemming from the production of the radioactive beam. In this paper, we report on the development of Collision-Induced Dissociation (CID) as a means of background reduction for experiments at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). This study was conducted to characterize the quality and purity of radioactive ion beams and the reduction of molecular contaminants to allow for mass measurements of radioactive isotopes to be done further from nuclear stability. This is the first demonstration of CID at an ISOL-type radioactive ion beam facility, and it is shown that molecular contamination can be reduced up to an order of magnitude.

   nucl-exphysics.ins-detInt.J.Mass Spectrometry(2022)·3 citations
2. 02*

   Fission Fragments Mass Yields of Actinide Nuclei

   Krzysztof Pomorski🇵🇱 · Bożena Nerlo-Pomorska🇵🇱

   A new, rapidly convergent Fourier over spheroid parametrization is developed to describe the shape of a fissioning nucleus: its elongation, non-axiality and left-right asymmetry and neck formation. The 4D Potential Energy Surfaces (PES) of even-even actinide nuclei are evaluated within the macro-micro model. The Langevin trajectories generated on such PESs allow for obtaining the fission fragments' mass and kinetic energy yields. The charge equilibration at the scission configuration and the post-scission neutron emission are also discussed.

   ↳ nucl-thnucl-exActa Phys.Polon.Supp.(2023)·8 citations
3. 03*

   pynucastro: A Python Library for Nuclear Astrophysics

   Alexander Smith Clark · Eric T. Johnson · Zhi Chen · Kiran Eiden · Donald E. Willcox🇺🇸 · Brendan Boyd🇬🇧 · Lyra Cao · Christopher J. DeGrendele · Michael Zingale🇺🇸

   We describe pynucastro 2.0, an open source library for interactively creating and exploring astrophysical nuclear reaction networks. We demonstrate new methods for approximating rates and using detailed balance to create reverse rates, show how to build networks and determine whether they are appropriate for a particular science application, and discuss the changes made to the library over the past few years. Finally, we demonstrate the validity of the networks produced and share how we use pynucastro networks in simulation codes.

   ↳ astro-ph.IMnucl-exApJ(2023)·26 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.