Thu·Sep 25, 2025Thursday·September 25, 2025

1. 01*

   Multi-Cycle PWR Modeling with DRAGON and PARCS: Implications for Nuclear Data Assessment

   Benjamin Arthur Hugo Meunier

   Nuclear data libraries serve as the foundation for all calculations in the nuclear field. Their quality directly affects the accuracy of computations. When new nuclear data libraries are released, they must undergo validation through the use of integral experimental data. This work introduces an automated simulation pipeline that converts raw nuclear data into predictions for various reactors, significantly enhancing the validation process. This pipeline allows for the assessment of potential biases in integral measurement predictions for nuclear power plants before the release of a new nuclear data library. To achieve this, an implementation of history variables in DRAGON was developed to determine the macroscopic cross sections of the nodal code PARCS. This method has been verified for seven depletion cycles across three pressurised water reactors (PWRs) against publicly available data. The errors on the predictions are in the uncertainty range attributed to variations in nuclear data. Additionally, a methodology to assess the quality of novel nuclear data libraries against experimental measurements in PWRs is presented.

   nucl-exnucl-th0 citations
2. 02*

   Lifetime of the $4_1^{+}$ state of ${}^{132}$Te

   H. Mayr🇩🇪 · T. Stetz · V. Werner🇩🇪 · M. Beckers · A. Blazhev🇩🇪 · A. Esmaylzadeh🇩🇪 · J. Fischer🇩🇪 · R.-B. Gerst🇩🇪 · K.A. Gladnishki · K.E. Ide🇯🇵 · J. Jolie🇩🇪 · V. Karayonchev🇺🇸 and 13 other authors

   The evolution of the collectivity of tellurium isotopes from mid-shell towards $N=82$ is currently based mainly on properties of the first excited $2^{+}$ states. To extend structural information in this isotopic chain, in particular with respect to the balance of microscopic, seniority-type and collective excitations, electric quadrupole transition strengths from $4^{+}$ states need to be considered. An experiment was performed to determine the $4_1^{+}$ lifetime of ${}^{132}$Te via the recoil-distance Doppler-shift method at the University of Cologne tandem accelerator. The isotope of interest was populated in the two neutron-transfer reaction ${}^{130}$Te(${}^{18}$O,${}^{16}$O)${}^{132}$Te${}^{\ast }$. The $E2$ decay transition strength has been determined to be $B(E2;4_1^{+}\to 2_1^{+})=9.3(10)\text{W.u.}$ and compares favourably to shell model calculations.

   nucl-exPRC(2026)·1 citation
3. 03*

   Abnormal dense and dilute nuclear systems

   E.E. Kolomeitsev🇷🇺 · D.N. Voskresensky🇷🇺

   Researchers have long been interested in exotic states of matter. In the early 1970s, Migdal proposed the existence of metastable or stable nuclei containing a pion condensate, and Bodmer posited the existence of collapsed nuclei with a quark core. Lee and Wick proposed that compressed nuclear matter could undergo a phase transition into a scalar condensate state with effectively very light baryons. In the mid-1980s, Witten pointed out that strange quark matter may be an absolutely stable form of matter that can exist in the form of quark strangelets. These hypotheses stimulated large experimental efforts to detect these states in heavy-ion collisions and in terrestrial samples. Additionally, the cosmos is the arena for a broad search for traces of exotic matter in compact objects and other energetic phenomena. We review various approaches and arguments for the possibility of abnormal states of matter, including metastable and stable dense objects with condensates, as well as dilute nuclear objects. Among these, we discuss scalar condensate and p-wave and s-wave pion condensations in dense nuclear systems and the formation of a $\Delta$ resonance matter. Then we consider a scalar mode condensation triggered by the Pomeranchuk instability in dilute nuclear matter, and clustering. We also mention recent ideas that a relativistic rotation and a dark-matter component may stabilize abnormal nuclear systems. Finally, we list some observational anomalies that cannot yet be appropriately explained by conventional physics.

   ↳ nucl-thnucl-exEPJA(2026)·0 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.