Abstract We calculate the dynamics of fast neutrino flavor conversions with Boltzmann collisions scatterings in a homogeneous system. find enhancement or suppression various setups collision terms. analyze mechanism based on motion polarization vectors cylindrical coordinate analogous to pendulum motion. The phases all synchronize linear evolution phase, and phase deviation from Hamiltonian governs conversions. In non-linear regime conversions, terms induce spiral vector gradually make space...

We study the effects of collective neutrino oscillations on $\nu p$ process nucleosynthesis in proton-rich neutrino-driven winds by including both multi-angle $3\times3$ flavor mixing and network calculation. The number flux energetic electron antineutrinos is raised a $1$D supernova model for $40 M_{\odot}$ progenitor. When gas temperature decreases down to $\sim2-3\times10^{9}$ K, increased promotes more actively, resulting enhancement $p$-nuclei. In early phase wind, blowing at $0.6$ s...

Abstract We calculate the Galactic Chemical Evolution of Mo and Ru by taking into account contribution from ν p -process nucleosynthesis. estimate yields -nuclei such as 92,94 96,98 through in various supernova progenitors based upon recent models. In particular, energetic hypernovae produces a large amount compared to yield ordinary core-collapse SNe. Because this, abundances Galaxy are significantly enhanced at [Fe/H] = 0 -process. find that is main contributor elemental abundance 92 low...

The differential cross sections at 180\ifmmode^\circ\else\textdegree\fi{} for the reactions $\ensuremath{\gamma}+p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{+}+n$ and $\ensuremath{\gamma}+n\ensuremath{\rightarrow}{\ensuremath{\pi}}^{\ensuremath{-}}+p$ were measured using a magnetic spectrometer to detect ${\ensuremath{\pi}}^{\ifmmode\pm\else\textpm\fi{}}$ mesons. In order reduce spread of energy resolution due nucleon motion inside deuteron, photon difference method was employed with 50-MeV...

Measurements of multistep cascade gamma-ray spectra from several low-lying <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msup><a:mn>1</a:mn><a:mo>+</a:mo></a:msup></a:math> resonances in the <b:math xmlns:b="http://www.w3.org/1998/Math/MathML"><b:mrow><b:mmultiscripts><b:mi>Pu</b:mi><b:mprescripts/><b:none/><b:mn>239</b:mn></b:mmultiscripts><b:mo>(</b:mo><b:mi>n</b:mi><b:mo>,</b:mo><b:mi>γ</b:mi><b:mo>)</b:mo></b:mrow></b:math> reaction were made using DANCE detector. The measured...

We derive the fully self-consistent quasiparticle random-phase approximation (QRPA) equations with noniterative finite amplitude methods and calculate transition strengths of giant resonances. Then, we apply QRPA results to both neutron radiative capture calculations based on statistical Hauser-Feshbach theory inelastic scattering distorted-wave Born (DWBA). compare calculated available experimental data demonstrate how our approach can reproduce resonances various nuclear reactions.

We investigate the neutrino flavor change effects due to self-interaction, shock wave propagation as well matter effect on neutrino-process of core-collapsing supernova (CCSN). For hydrodynamics, we use two models: a simple thermal bomb model and specified hydrodynamic for SN1987A. As pre-supernova model, take an updated adjusted explain SN1987A employing recent development $(n,\gamma)$ reaction rates nuclei near stability line $(A \sim 100)$. luminosity, adopt different equivalent...

Polarization of $\ensuremath{\Lambda}$ hyperons and differential cross sections for the reaction $\ensuremath{\gamma}+p\ensuremath{\rightarrow}{K}^{+}+\ensuremath{\Lambda}$ were measured at ${K}^{+}$-meson center-of-mass angles around 45\ifmmode^\circ\else\textdegree\fi{}, 70\ifmmode^\circ\else\textdegree\fi{}, 90\ifmmode^\circ\else\textdegree\fi{} incident photon energies 1054, 1100, 1160 MeV. The ${K}^{+}$ mesons detected with a magnetic spectrometer velocity-selection system based on...

In order to investigate the impact of collective neutrino oscillations (CNOs) on signal from a nearby supernova, we perform three-flavor oscillation simulations employing multiangle effect. The background hydrodynamic model is based simulation $8.8\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$ progenitor star. We find that CNO commences after some 100 ms post bounce. Before this, suppressed by matter-induced decoherence. inverted mass hierarchy, spectrum ${\overline{\ensuremath{\nu}}}_{e}$...

We calculate the abundances of $^{7}$Li, $^{11}$B, $^{92}$Nb, $^{98}$Tc, $^{138}$La, and $^{180}$Ta produced by neutrino $(\nu)$ induced reactions in a core-collapse supernova explosion. consider modification $\nu$ self-interaction ($\nu$-SI) near neutrinosphere Mikheyev-Smirnov-Wolfenstein effect outer layers for time-dependent energy spectra. Abundances $^{7}$Li heavy isotopes $^{98}$Tc $^{138}$La are reduced factor 1.5-2.0 $\nu$-SI. In contrast, $^{11}$B is relatively insensitive to find...

The particle-induced hadronic de-excitation of the Hoyle state in 12C induced by inelastic scattering a hot and dense plasma can enhance triple-alpha reaction rate. This prevents production heavy nuclei within neutrino-driven winds core-collapse supernovae raises question as to contribution proton-rich origin p–nuclei solar-system abundances. Here we study νp-process nucleosynthesis relevant Mo92,94 Ru96,98 considering such de-excitation. We find that enhanced rate proton increase an...

We calculate the spin-flavor precession (SFP) of Dirac neutrinos induced by strong magnetic fields and finite neutrino moments in dense matter. As found case Majorana neutrinos, SFP is enhanced large field potential suppressed matter potentials composed baryon density electron fraction. The possible irrespective when fraction close to $1/3$. diagonal that are prohibited for enable spin without any flavor mixing. With supernova hydrodynamics simulation data, we discuss possibility both...

The finite amplitude method (FAM) is a very efficient approach for solving the fully self-consistent random-phase approximation (RPA) equations. We use FAM to rederive RPA matrices general Skyrme-like functionals, calculate electric dipole (E1) and magnetic (M1) giant resonances, compare results with available experimental evaluated data. For E1 transitions in heavy nuclei, calculations reproduce well resonance energy of photoabsorption cross sections. In case M1 transitions, we show that...

Prompt and $\ensuremath{\beta}$-delayed fission observables, such as the average number of prompt delayed neutrons, independent cumulative product yields, $\ensuremath{\gamma}$-ray energy spectra for photonuclear reactions on $^{235,238}\mathrm{U}$ $^{239}\mathrm{Pu}$, are calculated with Hauser-Feshbach fragment decay (${\mathrm{HF}}^{3}\text{D}$) model compared available experimental data. In analysis neutron-induced to case photo-induced fission, an excellent reproduction neutron yields...

We derive the equations of quasiparticle random-phase approximation (QRPA) based on finite amplitude method with Hartree-Fock+Bardeen--Cooper--Schrieffer (HF+BCS) single-particle states, and calculate magnetic dipole ($M1$) transition for deformed gadolinium isotopes. Our QRPA calculation shows both large spin-flip transitions in 5 to 10 MeV excitation energy low orbital that would correspond $M1$ scissors mode observed nuclear experiments. Then, we neutron capture reactions statistical...

We simulate neutrino-antineutrino oscillations caused by strong magnetic fields in dense matter. With the and large neutrino moments, Majorana neutrinos can reach flavor equilibrium. find that equilibration of are sensitive to values baryon density electron fraction inside The suppressed case neutron- (proton)-rich On other hand, occurs when is close 0.5 even density. From simulations, we propose a necessary condition for also study whether such satisfied near protoneutron star using results...

Abstract We investigate the dynamics of fast neutrino flavor conversions (FFCs) in one-dimensional (1D) and zero-dimensional (0D) models, which spatial advection is considered ignored, respectively. In this study, we employ snapshots obtained by our self-consistent, realistic Boltzmann-neutrino-radiation-hydrodynamics simulations. show that FFC growth rate considerably larger 1D model than 0D model, as expected from previous linear analysis results. find momentum space dimension does not...

The pre-equilibrium reaction mechanism is considered in the context of exciton model. A modification to one-particle one-hole state density studied which can be interpreted as a collective enhancement. magnitude enhancement set by simulating Lawrence Livermore National Laboratory (LLNL) pulsed-spheres neutron-leakage spectra. impact explored highly deformed actinide, 239-Pu. consequence this removal fictitious levels Distorted-Wave Born Approximation often used modern nuclear codes.

In the decommissioning work for concrete walls of PET-cyclotron rooms, an in-situ measurement is expected to be useful obtaining a contour map specific activity on without destroying structure. this study, activities γ-ray-emitting radionuclides in were determined by using method employing portable Ge semiconductor detector, and compared with obtained sampling method, at Medical Pharmacological Research Center Foundation Hakui, Ishikawa, Japan. Accordingly, could determination method. Since...

We aimed to investigate factors associated with impaired physical function [defined as Health Assessment Questionnaire Disability Index (HAQ-DI) >0.5] of old-old (aged 75-84 years) patients rheumatoid arthritis.Data from 15,185 arthritis in the National Database Rheumatic Disease Japan were extracted 2017 2018. enrolled 3708 aged 55-84 years Simplified Activity (SDAI) ≤11 and Steinbrocker Stage I/II. Factors HAQ-DI >0.5 analysed by multivariable logistic regression.About half received...

A Test Accumulation Ring for NUMATRON Project, TARN, is now under construction at INS, University of Tokyo. Heavy ions from the SF Cyclotron such as N5+ with an energy 8.5 MeV per nucleon, are planned to be injected and stacked in ring by a combination multiturn injection RF stacking method Expected intensity beam, e.g. N5+, 2 × 1010 particles, survival rate 90 % anticipated pressure 1 10-10 torr during time sec. In this paper, present status described well performances major subsystems.

Nuclear data is critical for many modern applications from stockpile stewardship to cutting edge scientific research. Central these pursuits a robust pipeline nuclear modeling as well assimilation and dissemination. We summarize small portion of the ongoing efforts at Los Alamos medium mass heavy nuclei. begin with an overview NEXUS framework show how one its modules can be used model parameter optimization using Bayesian techniques. The mathematical affords combination different measured in...

The partcle-induced hadronic de-excitation of the Hoyle state in $^{12}$C induced by inelastic scattering a hot and dense plasma can enhance triple-alpha reaction rate. This prevents production heavy nuclei within neutrino-driven winds core-collapse supernovae raises question as to contribution proton-rich origin $p$-nuclei solar system abundances. Here we study $\nu p$-process nucleosynthesis relevant $^{92,94}\mathrm{Mo}$ $^{96,98}\mathrm{Ru}$ considering such particle-induced...