Mon·Oct 27, 2025Monday·October 27, 2025

1. 01*

   EXKALIBUR: Towards a Kaonic Atoms Periodic Table to test Fundamental Interactions

   Simone Manti🇮🇹 · Leonardo Abbene🇮🇹 · Francesco Artibani🇮🇹 · Massimiliano Bazzi🇮🇹 · Giacomo Borghi🇮🇹 · Damir Bosnar🇭🇷 · Mario Bragadireanu🇷🇴 · Antonino Buttacavoli🇮🇹 · Mario Carminati🇮🇹 · Alberto Clozza🇮🇹 · Francesco Clozza🇮🇹 · Luca De Paolis🇮🇹 and 25 other authors

   Kaonic atoms, formed when a negatively charged kaon replaces an electron, provide a unique laboratory to test fundamental interactions at low energies. EXKALIBUR (EXtensive Kaonic Atoms research: from LIthium and Beryllium to URanium) is a program to perform systematic, high-precision X-ray spectroscopy of selected kaonic atoms across the periodic table at the DA$\Phi$NE accelerator at the National Laboratory of Frascati (INFN-LNF). Here, we outline its detector-driven strategy: Silicon Drift Detectors for 10-40 keV transitions in light targets (Li, Be, B, O), CdZnTe detectors for 40-300 keV lines in intermediate-$Z$ systems (Mg, Al, Si, S), and a High-Purity Germanium detector for high-$Z$ atoms (Se, Zr, Ta, Mo, W, Pb), complemented by VOXES, a high-resolution crystal spectrometer for sub-eV studies. EXKALIBUR plans to (i) reduce the charged-kaon mass uncertainty below 10 keV, (ii) produce a database of nuclear shifts and widths to constrain multi-nucleon K${}^{-}$-nucleus interaction models, and (iii) provide precision data for testing bound-state QED in strong fields. We summarize the planned measurements and expected sensitivities within DA$\Phi$NE luminosities.

   nucl-ex1 citation
2. 02*

   Boron Nitride Coatings for the Enhanced Detection of Neutrons in CR-39

   Noah DAmico · Sandeep Puri · Ian Jones · Andrew Gillespie · Cuikun Lin🇨🇳 · Bo Zhao · R. V. Duncan

   The neutron detection efficiency of Columbia Resin 39 (CR-39) nuclear track detectors was assessed for AmBe, 252Cf, and D-T (14 MeV) neutron source spectra. A boron nitride (BN) coating for CR-39 was developed to enhance the neutron detection efficiency by converting neutrons into energetic alpha particles through the well-known 10B(n,a)7Li reaction. Separate partially coated CR-39 pieces were exposed to each neutron source and subsequently analyzed under optical microscope and through large-area Scanning Electron Microscopy (SEM) imaging over the irradiated area. The detection efficiency (tracks per neutron) was evaluated for each source spectra under optical and scanning electron microscopes and with or without BN coating. This resulted in a comprehensive guide to neutron detection with various sources using CR-39.

   ↳ physics.ins-detnucl-ex0 citations
3. 03*

   Paths to Superheavy Nuclei

   K. Godbey🇺🇸 · F.M. Nunes🇺🇸 · M. Albertsson🇺🇸 · K.J. Cook🇺🇸 · J.M. Gates🇺🇸 · K. Hagel🇺🇸 · K. Hagino🇯🇵 · M. Kowal🇵🇱 · Jin Lei🇨🇳 · J. Lubian🇧🇷 · A. Makowski🇵🇱 · P. McGlynn🇺🇸 and 7 other authors

   This document summarizes the discussions and outcomes of the Facility for Rare Isotope Beams Theory Alliance (FRIB-TA) topical program "The path to Superheavy Isotopes" held in June 2024 at FRIB. Its content is non-exhaustive, reflecting topics chosen and discussed by the participants. The program aimed to assess the current status of theory in superheavy nuclei (SHN) research and identify necessary theoretical developments to guide experimental programs and determine fruitful production mechanisms. This report details the intersection of SHN research with other fields, provides an overview of production mechanisms and theoretical models, discusses future needs in theory and experiment, explores other potential avenues for SHN synthesis, and highlights the importance of building a strong theory community in this area.

   ↳ nucl-thnucl-exJ.Phys.G(2025)·5 citations
4. 04*

   Can Bose-Einstein condensates enhance radioactive decay?

   Hanzhen Lin🇺🇸 · Yukun Lu🇺🇸 · Wolfgang Ketterle🇺🇸

   This paper lays out the principles of how Bose-Einstein condensates can modify radioactive decay. We highlight the challenges of many modes and short coherence times due to the $\approx$ MeV energies of the emitted radiation. Recent proposals for gamma ray and neutrino lasers claim that using a Bose-Einstein condensate as a source would solve these issues. We show that this is not the case, and the proposed experiments would have a gain of only $10^{-16}$ or smaller. We also analyze proposals for gamma ray lasers based on stimulated annihilation of positronium Bose-Einstein condensates.

   ↳ quant-phhep-phnucl-exphysics.atom-phPRL(2026)·3 citations
5. 05*

   Fundamental impossibility of a superradiant neutrino laser

   Yu-Kun Lu🇺🇸 · Hanzhen Lin🇺🇸 · Wolfgang Ketterle🇺🇸

   Here we address the fundamental question of whether an idealized system of $N$ atoms will show collective behavior and superradiance when it emits fermions instead of photons. We show that for single-fermion emission processes, the maximum emission is $\propto N$ and not $\propto N^2$, which proves the absence of superradiance and shows that the recent proposal to realize a superradiant neutrino laser is impossible. This can be understood as either destructive interference of fermionic transition amplitudes, or Pauli blockade by collective excitations with fermionic nature. We derive the exact solution of the fermionic Dicke problem and analyze the decay dynamics in various regimes. We extend the proof to arbitrary Hamiltonians and show that the jump rate operator for neutrino emission has a maximum eigenvalue of $N$ times the single-particle rate ${\Gamma }_0$. States with low excitation can show collective behavior and emit at a rate of $N{\Gamma }_0$.

   ↳ quant-phhep-phnucl-exphysics.atom-phPRL(2026)·3 citations
6. 06*

   Data sorting modes of phoswich detector array

   R. Li🇫🇷 · D. Verney🇫🇷 · C. Delafosse🇫🇮 · M. N. Harakeh🇳🇱 · A. Maj🇵🇱 · F. Didierjean🇫🇷 · L. Al Ayoubi🇫🇷 · H. Al Falou🇱🇧 · P. Bednarczyk🇵🇱 · G. Benzoni🇮🇹 · F. Le Blanc🇫🇷 · V. Bozkurt🇹🇷 and 22 other authors

   The different data-sorting modes of the phoswich detector array PARIS used for detecting high-energy (4$-$10 MeV) $\gamma$ rays are investigated. The characteristics including time resolution, energy resolution and detection efficiency under various modes are studied. The present study shows that PARIS has capabilities of rejecting escape and pileup events when used for decay spectroscopy. Notably, the methods presented in this work refer specifically to the $\beta$-decay experiment of ${}^{80g+m}$Ga conducted with three PARIS clusters comprising 27 phoswich detectors, rather than to a general report on the PARIS array or its overall performance for in-beam spectroscopy. Compared with the 2"$\times$2"$\times$2" LaBr${}_3$(Ce) detector (Ciemała et al., 2009), even in individual mode, PARIS provides significant suppression of single- and double-escape peaks and reduces background via vetoing function of the outer-volume NaI(Tl) crystals. In contrast to the common approach of adding back the energies in LaBr${}_3$(Ce) and NaI(Tl) to increase the detection efficiency of the full-energy peak, using NaI(Tl) as a veto shield provides a superior trade-off for applications where spectral purity is essential. Employing add-back analysis within each cluster of nine phoswiches or between all phoswiches could enhance full-energy peak efficiency and further suppress escape peaks and background. Applying a multiplicity condition provides a further suppression but simultaneously lowers the statistics of full-energy peaks.

   ↳ physics.ins-detnucl-exNucl.Instrum.Meth.A(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.