Tootfinder

🫧 Nuclear startup Deep Fission goes public in a curious SPAC
https://techcrunch.com/2025/09/08/nuclear-startup-deep-fission-goes-public-in-a-curious-spac/

Nuclear startup Deep Fission goes public in a curious SPAC | TechCrunch
Deep Fission had been seeking to raise $15 million in a seed round as recently as April. The reverse merger will raise twice that amount.

Transport properties of nuclear matter from anomalous fission yields
Karl-Heinz Schmidt, Christelle Schmitt, Andreas Heinz
https://arxiv.org/abs/2509.24590 https://

Transport properties of nuclear matter from anomalous fission yields
In nuclear fission, a heavy nucleus splits into two fragments, driven by the Coulomb repulsion between the positively charged protons. The fission process is governed by the potential energy and basic transport properties of nuclear matter like inertial mass and viscosity. While inertia induces features of memory, viscosity attenuates these features by damping. Exploring signatures of memory in fission is crucial for overcoming the current severe lack of experimental information on the transpor…

When you're at a party and there's a look, it's always a good idea to ask, "So what's the thing you're into? Like, what are you a real sicko for?"
Conversation tonight covered board games, animation, fission v. fusion, and Polari.
#yeshahahayes

Nonreciprocal interactions induce persistent active clusters in binary colloids
Shoma Hara, Masazumi Okada, Keisuke Kittaka, Sho Tanami, Yuichi Iwasaki, Hiroaki Ishikawa, Kiwamu Yoshii, Yutaka Sumino
https://arxiv.org/abs/2509.23164

Nonreciprocal interactions induce persistent active clusters in binary colloids
We study binary colloids under AC electric fields, where electrohydrodynamic (EHD) flows generate nonreciprocal interactions. Mixing particles of different sizes produces self-propelled pairs that fragment and reassemble into persistent active clusters, unlike the static crystallization of single-sized systems. Agent-based and continuum models reproduce these dynamics and identify two key mechanisms: asymmetric pair propulsion and spray-like fission from excluded-volume polarity. These results …

Isoenergetic description of induced fission pathways within energy-density functional theory
Alan A. Dzhioev, N. V. Antonenko
https://arxiv.org/abs/2509.22006 https://

Isoenergetic description of induced fission pathways within energy-density functional theory
A thermodynamically consistent description of induced fission pathways in the superheavy nucleus $^{296}$Lv is presented within the framework of nuclear energy-density functional theory. Using self-consistent finite-temperature Hartree-Fock-Bogoliubov calculations with the Skyrme-type energy-density functional SkM$^*$, we derive and compare effective potentials corresponding to different thermodynamic processes -- isothermal ($T=\text{const}$), isentropic ($S=\text{const}$), and isoenergetic ($…

Exploring shell effects in fission yields of neutron-deficient Th, Ac, and Ra isotopes near N=126
J. L. Rodr\'iguez-S\'anchez, J. Ta\"ieb
https://arxiv.org/abs/2508.17024

Exploring shell effects in fission yields of neutron-deficient Th, Ac, and Ra isotopes near N=126
Studies of nuclear fission over recent decades have led to a well-defined mapping of neutron and proton shell effects across the nuclear chart, particularly within the valley of stability. These shell effects play a crucial role in driving the asymmetric splitting of fissioning nuclei, as reflected in fission yields that are strongly influenced by spherical and deformed shell closures. In the actinide region, the existence of two primary fission modes, standard I and standard II, has been well-…

Quasi one dimensional anomalous (rogue) waves in multidimensional nonlinear Schr\"odinger equations 1: fission and fusion
Francesco Coppini, Paolo Maria Santini
https://arxiv.org/abs/2508.18120

Quasi one dimensional anomalous (rogue) waves in multidimensional nonlinear Schrödinger equations 1: fission and fusion
In this paper we study the first nonlinear stage of modulation instability (NLSMI) of $x$-periodic AWs in multidimensional generalizations of the focusing nonlinear Schrödinger (NLS) equation, like the non-integrable elliptic and hyperbolic NLS equations in $2+1$ and $3+1$ dimensions. In the quasi one-dimensional (Q1D) regime, where the wavelength in the $x$ direction of propagation is significantly smaller than in the transversal directions, the behavior is universal, independent of the parti…

Spatiotemporal Nonlinear Pulse Dynamics in Multimode Silicon Nitride Waveguides
Azka Maula Iskandar Muda, U\u{g}ur Te\u{g}in
https://arxiv.org/abs/2508.18945 https://

Spatiotemporal Nonlinear Pulse Dynamics in Multimode Silicon Nitride Waveguides
We present an open-source multimode nonlinear Schrödinger equation-based simulation to investigate spatiotemporal nonlinear pulse propagation in thin-film silicon nitride (SiN) waveguides. Using this framework, we analyze femtosecond pulse evolution under diverse excitation conditions in a 6 μm wide SiN waveguide supporting six TE modes. Our results reveal that mode selection and power distribution critically govern nonlinear coupling, soliton fission, and dispersive wave generation, leading …

mist: MIST protein interaction database (2020)
The Molecular Interaction Search Tool (MIST) is a comprehensive resource of molecular interactions, assembled from severla primary sources. MIST currently supports several species, including:.
This network has 50 nodes and 41 edges.
Tags: Biological, Protein interactions, Unweighted

Accurate spontaneous fission half-lives from a microscopic large-scale nuclear structure model
Adri\'an S\'anchez-Fern\'andez, Silvia Bara, Wouter Ryssens, St\'ephane Goriely
https://arxiv.org/abs/2508.16240

Accurate spontaneous fission half-lives from a microscopic large-scale nuclear structure model
We demonstrate the ability of the BSkG3 model to predict large-scale fission properties. In particular, we focus on the description of spontaneous fission half-lives, which are crucial for modeling the r-process. To assess the model accuracy, we compare predicted and experimental values for all nuclei with available data. The combination of BSkG3 predictive power for ground state and fission properties, the inclusion of triaxial and octupole degrees of freedom, the use of microscopic collective…

Excitonic description of singlet fission beyond dimer model : a matrix product state approach
Supriyo Santra, Amartya Bose, Debashree Ghosh
https://arxiv.org/abs/2509.03966 http…

Excitonic description of singlet fission beyond dimer model : a matrix product state approach
The importance of singlet fission as a fundamental process with a variety of implications in energy harvesting cannot be overstated. The challenge is in characterizing the energy states of these large singlet fission molecular aggregates that participate in the process. Large dimensionality and essential multi-configuration nature of the electronic states of interest combine to make accurate ab initio calculations prohibitively difficult. We present a spin-resolved tight-binding excitonic model…

Prediction of Spallation Induced Transmutation Rates For Long Lived Fission Products via Proton Accelerator
Grigor Tukharyan, William Reed Kendrick, Areg Danagoulian, Benoit Forget
https://arxiv.org/abs/2510.05507

Prediction of Spallation Induced Transmutation Rates For Long Lived Fission Products via Proton Accelerator
Long lived fission products represent a major challenge in nuclear waste management due to persistent radiotoxicity over very long timescales. This study focuses on six of these fission products: Se-79, Zr-93, Tc-99, Sn-126, I-127, Cs-135. This study investigates the feasibility of spallation driven transmutation, in which a high energy proton beam strikes a heavy spallation target to generate neutrons that induce transmutation in the fission products surrounding the target. Lead and depleted u…

mist: MIST protein interaction database (2020)
The Molecular Interaction Search Tool (MIST) is a comprehensive resource of molecular interactions, assembled from severla primary sources. MIST currently supports several species, including:.
This network has 23826 nodes and 285752 edges.
Tags: Biological, Protein interactions, Unweighted

Modeling oxygen-void interactions in uranium nitride
Mohamed AbdulHameed, Anton J. Schneider, Benjamin Beeler, Michael W. D. Cooper
https://arxiv.org/abs/2508.14329 https://

Modeling oxygen-void interactions in uranium nitride
Oxygen impurities in uranium nitride (UN) are reported to influence its swelling behavior under irradiation, yet the underlying mechanism remains unknown. In this work, we develop a first-principles model that quantifies the interaction of oxygen with voids and fission gas bubbles in UN, leading to a reduction in surface energy that can promote swelling. The analysis reveals that segregation of substitutional oxygen at surface nitrogen sites is the primary driver of surface energy reduction, $&…

Fusion and Fission of Particle-like Chiral Nematic Vortex Knots
Darian Hall, Jung-Shen Benny Tai, Louis H. Kauffman, Ivan I. Smalyukh
https://arxiv.org/abs/2508.05841 https://…

Fusion and Fission of Particle-like Chiral Nematic Vortex Knots
Vortex knots have been seen decaying in many physical systems. Here we describe topologically protected vortex knots, which remain stable and undergo fusion and fission while conserving a topological invariant analogous to that of baryon number. While the host medium, a chiral nematic liquid crystal, exhibits intrinsic chirality, cores of the vortex lines are structurally achiral regions where twist cannot be defined. We refer to them as "dischiralation" vortex lines, in analogy to dislocations…

Double excitations in molecules
Namana Venkatareddy, Victor Ghosh, H. R. Krishnamurthy, Manish Jain
https://arxiv.org/abs/2508.16262 https://arxiv.org/pdf/…

Double excitations in molecules
Double excitations in organic molecules have garnered significant interest as a result of their importance in singlet fission and photophysics. These excitations play a crucial role in understanding the photoexcitation processes in polyenes. To describe photoexcited states with both single and double excitation character, we use a first-principles many-body theory that combines the GW / Bethe-Salpeter equation and the configuration interaction (CI) methods. Specifically, we develop and employ t…

mist: MIST protein interaction database (2020)
The Molecular Interaction Search Tool (MIST) is a comprehensive resource of molecular interactions, assembled from severla primary sources. MIST currently supports several species, including:.
This network has 66 nodes and 65 edges.
Tags: Biological, Protein interactions, Unweighted

Search for spontaneous fission of plutonium and americium nuclides using gamma spectrometry
I. S. Klyuyev, D. V. Kasperovych, V. V. Kobychev
https://arxiv.org/abs/2509.26191 htt…

Search for spontaneous fission of plutonium and americium nuclides using gamma spectrometry
Spontaneous fission in americium and plutonium isotopes was investigated using high-resolution gamma spectrometry. This process was investigated through analysis of a certified PuO2 sample spectrum obtained from the IAEA database of reference spectra. Measurements were carried out with a HPGe detector, and detection efficiency calibration was performed by Monte Carlo simulations using GEANT4. There are no peaks observed that can be ascribed to beta decay of expected spontaneous-fission daughter…

Mountain Pass Critical Points of the Liquid Drop Model
Gregory R. Chambers, Jared Marx-Kuo
https://arxiv.org/abs/2509.09098 https://arxiv.org/pdf/2509.0909…

Mountain Pass Critical Points of the Liquid Drop Model
We consider Gamow's liquid drop functional, $\mathcal{E}$, on $\mathbb{R}^3$ and construct non-minimizing, volume constrained, critical points for volumes $3.512 \cong α_0 < V < 10$. In this range, we establish a mountain pass set up between a ball of volume $V$ and two balls of volume $V/2$ infinitely far apart. Intuitively, our critical point corresponds to the maximal energy configuration of an atom of volume $V$ as it undergoes fission into two atoms of volume $V/2$. Our proof relies on ge…

Reducing parametric uncertainties through information geometry methods
M. Imbri\v{s}ak, A. E. Lovell, M. R. Mumpower
https://arxiv.org/abs/2508.19474 https://

Reducing parametric uncertainties through information geometry methods
Information geometry is a study of applying differential geometry methods to challenging statistical problems, such as uncertainty quantification. In this work, we use information geometry to study how measurement uncertainties in pre-neutron emission mass distributions affect the parameter estimation in the Hauser-Feshbach fission fragment decay code, CGMF. We quantify the impact of reduced uncertainties on the pre-neutron mass yield of specific masses to these parameters, for spontaneous fiss…

First Measurement of Neutrino Emissions from Spent Nuclear Fuel by the Double Chooz Experiment
Double Chooz Collaboration, T. Abrah\~ao, H. Almazan, J. C. dos Anjos, S. Appel, J. C. Barriere, I. Bekman, T. J. C. Bezerra, L. Bezrukov, E. Blucher, C. Bourgeois, C. Buck, J. Busenitz, A. Cabrera, M. Cerrada, E. Chauveau, P. Chimenti, O. Corpace, J. V. Dawson, J. F. Du, Z. Djurcic, A. Etenko, H. Furuta, I. Gil-Botella, A. Givaudan, H. Gomez, M. C. Goodman, T. Hara, J. Haser, D. Hellwig, A. …

First Measurement of Neutrino Emissions from Spent Nuclear Fuel by the Double Chooz Experiment
Neutrino emission from nuclear reactors provides real-time insights into reactor power and fuel evolution, with potential applications in monitoring and nuclear safeguards. Following reactor shutdown, a low-intensity flux of ``residual neutrinos'' persists due to the decay of long-lived fission isotopes in the partially burnt fuel remaining within the reactor cores and in spent nuclear fuel stored in nearby cooling pools. The Double Chooz experiment at the Chooz B nuclear power plant in France …

Intramolecular Singlet Fission Through a Coherently Coupled Excimer-like Intermediate
Sanjoy Patra, Atandrita Bhattacharyya, Ch. Mudasar Hussain, Vijay P. Singh, Supriyo Santra, Debashree Ghosh, Pritam Mukhopadhyay, Vivek Tiwari
https://arxiv.org/abs/2508.21568

Intramolecular Singlet Fission Through a Coherently Coupled Excimer-like Intermediate
Singlet Fission (SF) into two triplets offers exciting avenues for high-efficiency photovoltaics and optically initializable qubits. While the chemical space of SF chromophores is ever-expanding, the mechanistic details of electronic-nuclear motions that dictate the photophysics are unclear. Rigid SF dimers with well-defined orientations are necessary to decipher such details. Here, using polarization-controlled white-light two-dimensional and pump-probe spectroscopies, we investigate a new cla…

Excitation energy of fission fragments within nuclear time-dependent density functional theory
Antonio Bjel\v{c}i\'c, Nicolas Schunck, Marc Verriere
https://arxiv.org/abs/2510.06701

Excitation energy of fission fragments within nuclear time-dependent density functional theory
The number and properties of the neutrons and photons emitted in nuclear fission are directly related to the excitation energy of the fission fragments when they are formed at scission. Though not observable experimentally because of the extremely short time scales, the excitation energy of fission fragments can be predicted by microscopic theory based on time-dependent density functional theory (TDDFT). Initial results on the value of the total kinetic energy of fission reactions were very pro…

Chromium-doped uranium dioxide fuels: A review
Mack Wesley Cleveland, Andrew Nelson, Ericmoore Jossou
https://arxiv.org/abs/2510.07698 https://arxiv.org/pd…

Chromium-doped uranium dioxide fuels: A review
UO2 doped with parts per million Cr2O3 powder is considered a potential near term accident tolerant fuel candidate. Here, the results of decades of industry and academic research into Cr-doped UO2 are analyzed and their shortcomings are critiqued. Focusing on the incorporation mechanisms of Cr into the fuel matrix, we explore a mechanistic understanding of the characteristic properties of Cr-doped UO2, notably, enhanced fission gas retention attributed to enlarged grain sizes following sinterin…

Impact of shape coexistence on the symmetric to asymmetric fission mode transition in Th isotopes
Shengyuan Chen, Zeyu Li, Minghui Zhou, Zhipan Li
https://arxiv.org/abs/2508.08616

Impact of shape coexistence on the symmetric to asymmetric fission mode transition in Th isotopes
We study the evolution of fission modes along the Th isotopic chain using a microscopic framework combining the time-dependent generator coordinate method and finite-temperature covariant density functional theory. Theoretical fission fragment charge distributions agree well with experiments, and reveal a rapid symmetric-to-asymmetric transition from $A=222$ to 234. By analyzing the free energy surfaces and time evolution of collective probability density distributions, we demonstrate that this…

mist: MIST protein interaction database (2020)
The Molecular Interaction Search Tool (MIST) is a comprehensive resource of molecular interactions, assembled from severla primary sources. MIST currently supports several species, including:.
This network has 27105 nodes and 334495 edges.
Tags: Biological, Protein interactions, Unweighted

Replaced article(s) found for nucl-ex. https://arxiv.org/list/nucl-ex/new
[1/1]:
- Prediction of Spallation Induced Transmutation Rates For Long Lived Fission Products via Proton A...
Grigor Tukharyan, William Reed Kendrick, Areg Danagoulian, Benoit Forget

mist: MIST protein interaction database (2020)
The Molecular Interaction Search Tool (MIST) is a comprehensive resource of molecular interactions, assembled from severla primary sources. MIST currently supports several species, including:.
This network has 46404 nodes and 643319 edges.
Tags: Biological, Protein interactions, Unweighted

Replaced article(s) found for physics.acc-ph. https://arxiv.org/list/physics.acc-ph/new
[1/1]:
- Prediction of Spallation Induced Transmutation Rates For Long Lived Fission Products via Proton A...
Grigor Tukharyan, William Reed Kendrick, Areg Danagoulian, Benoit Forget

Replaced article(s) found for cond-mat.mtrl-sci. https://arxiv.org/list/cond-mat.mtrl-sci/new
[1/1]:
- High-Spin State Dynamics and Quintet-Mediated Emission in Intramolecular Singlet Fission
une, et al.

Tracking photophysical relaxation in spiropyran with simulated time-resolved X-ray absorption spectroscopy
Lina Frans\'en, Benjamin Roux, Sonia Coriani, Saikat Nandi, Morgane Vacher
https://arxiv.org/abs/2509.07002

Tracking photophysical relaxation in spiropyran with simulated time-resolved X-ray absorption spectroscopy
Spiropyran is a prototype photoswitch that undergoes photoinduced ring-opening via C-O bond fission. The quantum yield for this photochemical reaction is low, with photophysical relaxation being the dominant process. Previous theoretical studies have suggested that photophysical relaxation proceeds via cleavage and subsequent reformation of a C-N bond. However, experimental evidence for this mechanism is lacking; most time-resolved studies have probed in the ultraviolet-visible domain, where C-…

Beam-dust interactions in an e$^ $e$^-$ collider
Kazuhito Ohmi, Hitoshi Fukuma, Shinji Terui
https://arxiv.org/abs/2510.04415 https://arxiv.org/pdf/2510.04…

Beam-dust interactions in an e$^+$e$^-$ collider
In recent electron-positron colliders designed and operated with very low emittance and high current, the energy density of the beam has increased significantly compared to earlier designs. Under these conditions, interactions between the beam and residual materials within the beam pipe exert considerable mutual influence. The residual materials are heated by the beam, leading to evaporation, charging, and possible fission, eventually resulting in a plasma state. Conversely, the beam undergoes …

Replaced article(s) found for nucl-th. https://arxiv.org/list/nucl-th/new
[1/1]:
- Impact of shape coexistence on the symmetric to asymmetric fission mode transition in Th isotopes
Shengyuan Chen, Zeyu Li, Minghui Zhou, Zhipan Li

Examining potential energy surface through Chebyshev shape parametrization
K. Jyothish, M. S. Suryan Sivadas, A. K. Rhine Kumar
https://arxiv.org/abs/2508.06067 https://

Examining potential energy surface through Chebyshev shape parametrization
The present study introduce a novel approach, the Chebyshev shape parametrization, to describe the geometric configurations of atomic nuclei, with a particular emphasis on fission dynamics. In this framework, the nuclear surface is represented by a profile function expanded in a Chebyshev polynomial series, with deformation parameters derived analytically under volume conservation and centre-of-mass constraints. The proposed parametrization is shown to be universal robust, and we establish tran…