Wed·Nov 12, 2025Wednesday·November 12, 2025

1. 01*

   Energy Levels of 18Ne

   K. Setoodehnia🇺🇸 · J. H. Kelley · C. G. Sheu

   In this document, experimental nuclear structure data are evaluated for 18Ne for ENSDF. 18Ne was first identified by (1954Go17), see (2012Th01). The details of each reaction and decay experiment populating 18Ne levels are compiled and evaluated. The combined results provide a set of adopted values that include level energies, spins and parities, level half-lives, {\gamma}-ray energies, decay types and branching ratios, and other nuclear properties. This work supersedes the earlier work by Ron Tilley (1995Ti07) published in Nuclear Physics A 595 (1995) 1. The earlier evaluations were published by Fay Ajzenberg-Selove in (1959Aj76, 1972Aj02, 1978Aj03, 1983Aj01, and 1987Aj02).

   nucl-ex0 citations
2. 02*

   Energy Levels of 19Ne

   K. Setoodehnia🇺🇸 · J. H. Kelley · C. G. Sheu

   In this document, experimental nuclear structure data are evaluated for 19Ne. 19Ne was first identified by (1939Fo01), see (2012Th01). The details of each reaction and decay experiment populating 19Ne levels are compiled and evaluated. The combined results provide a set of adopted values that include level energies, spins and parities, level half-lives, {\gamma}-ray energies, decay types and branching ratios, and other nuclear properties. This work supersedes the earlier work by Ron Tilley (1995Ti07) published in Nuclear Physics A 595 (1995) 1. The earlier evaluations were published by Fay Ajzenberg-Selove in (1959Aj76, 1972Aj02, 1978Aj03, 1983Aj01, and 1987Aj02).

   nucl-ex1 citation
3. 03*

   Energy Levels of 8C

   K. Setoodehnia🇺🇸 · J. H. Kelley

   In this document, experimental nuclear structure data are evaluated for 8C. The details of each reaction populating 8C levels are compiled and evaluated. The combined results provide a set of adopted values that include level energies, spins and parities, level widths, decay types and branching ratios, and other nuclear properties. This work supersedes the earlier work by J. E. Purcell in (2018) published in the ENSDF database.

   nucl-ex0 citations
4. 04*

   Latest results from CUORE and prospects for CUPID

   K. Zhao (on behalf of the CUORE and CUPID collaborations)🇮🇹

   The search for neutrinoless double beta decay (0$\nu \beta \beta$) is fundamental for investigating lepton-number violation, probing new physics beyond the Standard Model, and determining whether neutrinos are Majorana particles. CUORE (Cryogenic Underground Observatory of Rare Events), a cryogenic bolometric experiment at LNGS, studies 0$\nu \beta \beta$ in ${}^{130}$Te using 988 TeO${}_2$ crystals. It is a milestone of cryogenic detector arrays with a tonne-scale detector operated for more than 7~years below 15~mK. Since 2017, CUORE has accumulated over 2.9~tonne-years of exposure, achieving one of the leading 0$\nu \beta \beta$ limits and one of the most precise two-neutrino double beta decay (2$\nu \beta \beta$) half-life measurements thanks to a detailed background reconstruction across a broad energy range. Building on CUORE's success, CUPID (CUORE Upgrade with Particle ID) aims to significantly enhance its 0$\nu \beta \beta$ discovery sensitivity to $10^{27}$ yr in ${}^{100}$Mo, covering the Inverted Hierarchy of neutrino masses. It will employ lithium molybdate (Li${}_2$MoO${}_4$) crystals enriched in ${}^{100}$Mo, alongside germanium light detectors with Neganov-Trofimov-Luke amplification, enabling simultaneous heat and light readout for enhanced background rejection. CUPID will reuse CUORE's cryostat and infrastructure. Current efforts focus on detector performance validation, sensitivity studies, and finalizing the experimental design to maximize physics reach. This work presents the latest CUORE results and outlines the key milestones toward CUPID's realization.

   nucl-exastro-ph.IMJINST(2026)·1 citation
5. 05*

   Cryogenic source of atomic tritium for neutrino-mass measurements and precision spectroscopy

   Aleksei Semakin🇫🇮 · Janne Ahokas🇫🇮 · Tom Kiilerich🇫🇮 · Sergey Vasiliev🇫🇮 · Francois Nez🇫🇷 · Pauline Yzombard🇫🇷 · Valery Nesvizhevsky🇫🇷 · Eberhard Widmann🇦🇹 · Paolo Crivelli🇨🇭 · Caroline Rodenbeck🇩🇪 · Marco Röllig🇩🇪 · Magnus Schlösser🇩🇪

   We propose a concept for a cryogenic source of atomic tritium at sub-Kelvin temperatures and energies suitable for magnetic trapping. The source is based on the dissociation of solid molecular T2 films below 1 K by electrons from a pulsed RF discharge, a technique recently demonstrated for atomic hydrogen, combined with buffer-gas cooling and magnetic confinement. We analyze the key processes limiting the source performance, adsorption, spin exchange and recombination, and show that atomic tritium fluxes exceeding 1e15 1/s at kinetic energies of 100 mK can be achieved at the entrance to the magnetic trap. Such a source would enable Doppler-free two-photon 1S-2S spectroscopy in atomic tritium for high-precision measurements of the triton charge radius, providing a crucial benchmark for bound-state QED and improving the comparison between electronic, muonic, and scattering determinations of nuclear sizes in light systems. Beyond spectroscopy, an atomic tritium source avoids molecular final state broadening in the beta decay and is therefore necessary for next generation neutrino mass measurements; combined with detector technologies such as sub-eV resolution quantum sensors or cyclotron radiation emission spectroscopy, it enables an order of magnitude improvement compared to the current best experimental limit. Additionally, the source can be used to generate a beam of low field seeking deuterium atoms for loading magnetic traps, an important benchmark before trapping tritium atoms, which is useful for precision spectroscopy.

   ↳ physics.atom-phnucl-exphysics.ins-detquant-phPRResearch(2026)·1 citation
6. 06*

   Revisiting the Possibility of a Sharp Phase Transition in Cold Neutron Stars

   Bao-Jun Cai🇨🇳 · Bao-An Li🇺🇸 · Yu-Gang Ma🇨🇳

   First-order phase transitions (FOPTs) in cold neutron stars (NSs) have been extensively studied and have provided valuable insights into the behavior of the densest matter visible in our Universe, although a strong consensus has yet to emerge. Revisiting the possibility of a hadron-quark FOPT from a new perspective, we examine the interplay between the coupled nature of gravity and microscopic interactions in Tolman--Oppenheimer--Volkoff (TOV) equations and the fundamental requirements of thermodynamic consistency in NSs. We demonstrate that a sharp FOPT manifested as a plateau in the equation of state (EOS) $P(\epsilon )$, i.e., pressure $P$ versus energy density $\epsilon$, is intrinsically incompatible with the regularity conditions of the TOV solutions. Although numerical integrations of the TOV equations with EOSs incorporating FOPTs may yield seemingly reasonable mass-radius relations consistent with current observations, such results can mask underlying inconsistencies. Our analysis thus establishes a structural consistency criterion for constraining dense-matter EOSs using NS observables, complementing existing studies of possible phase transitions in NS interiors.

   ↳ astro-ph.HEhep-phhep-thnucl-ex+10 citations
7. 07*

   On the Measurability of True Coincidence Summing in the GRIFFIN Spectrometer

   Liam Schmidt

   The measurement of gamma-rays from decaying nuclei allow for the investigation into nuclear structure. True coincidence summing occurs when two gamma-rays from a single decay get detected in a single detector and their energies sum together to give false peaks in the energy spectrum. Corrections to this summing effect are crucial for an accurate determination of nuclear decay events. The summing correction formalism of Semkow et al. is generalized here into the \textit{Semkow matrix formalism} and is extended into a multiplicity expansion. This formalism is used to calculate the matrix probabilities for 180-degree coincidence events as a method for correcting coincidence summing; in doing so, the deviation between the full correction and this 180-degree correction is shown as a function of multiplicity. This formalism is extended to the \textit{partitioned matrix formalism}, to calculate probabilities for \textit{gated} gamma rays; where two gamma-rays of interest are taken in multi-detector coincidence. The summing correction probabilities for gated gamma-rays are provided and the deviation is shown in a manner similar to that of the singles. Terms such as measurability, event equivalence, and ontic and epistemic events are defined. It is shown that within these definitions, coincidence summing is not sufficiently measurable, or rather, its sufficient measurability is statistically bounded by the deviations derived.

   ↳ physics.ins-detnucl-exAppl.Radiat.Isot.(2026)·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.