Motivated by the recent observation of coherent elastic neutrino-nucleus scattering (CE$\nu $NS) at COHERENT experiment, our goal is to explore its potential in probing important nuclear structure parameters. We show that data offers unique opportunities investigate neutron form factor. Our present calculations are based on deformed Shell Model (DSM) method which leads a better fit CE$\nu $NS data, as compared known phenomenological factors such Helm-type, symmetrized Fermi and...

The preceding paper (V) shows that fluctuation analysis applied to experimental data in a chaotic region of the nuclear spectrum, determines values or bounds for parameter Λ, proportional mean-squared near-diagonal matrix element symmetry-breaking interaction. immediate interest is with time-reversal invariance (TRI) which bounds, not values, are found. We show here how this information can be reduced bound on α, relative magnitude noninvariant (TRNI) part nucleon-nucleon This done terms...

Event detection rates for WIMP-nucleus interactions are calculated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:msup><mml:mrow><mml:mo> </mml:mo></mml:mrow><mml:mrow><mml:mn mathvariant="normal">71</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Ga, id="M2"><mml:mrow><mml:msup><mml:mrow><mml:mo> mathvariant="normal">73</mml:mn></mml:mrow></mml:msup></mml:mrow></mml:math>Ge, id="M3"><mml:mrow><mml:msup><mml:mrow><mml:mo>...

Following a major shortage of 99Mo in the 2009–2010 period, concern grew that aging reactor production facilities needed to be replaced. Most producers were using highly enriched 235U (HEU) as target material. The Organisation for Economic Co-...Read More

Abstract Applications of the proxy- SU (3) model Bonatsos and collaborators to nuclei in A = 60–90 region introduces (4) symmetry. Shell spaces with single particle orbits 1 p 3/2 , 1/2 0 f 5/2 g 9/2 are essential for these also protons neutrons this occupy same orbits. With applying ‘proxy scheme’, changes 7/2 giving spectrum generating algebra U (40) ⊃ [ (10) G SO (3)] ⨂ ST S (2) T (2)]. (3), we have model. It is easy see that symmetry implies goodness appearing above, i.e. calculations...

A general theory, based on central limit theorems and unitary-group decompositions of the microscopic $H$, is given for nuclear level density. The density appears in terms convolutions noninteracting-particle densities with easily calculable interaction functions explicitly Hamiltonian matrix elements.

Energy-level fluctuations are calculated by random-matrix methods, for time-reversal noninvariant (TRNI) Hamiltonians. The theory, applied to the data, shows that in neutron and proton resonance regions (i.e., heavy intermediate nuclei, respectively), local rms off-diagonal multiparticle $H(\mathrm{TRNI})$ matrix element $\ensuremath{\lesssim}\frac{D}{10}$, with $D$ level spacing. Spectral averaging methods reduce this a bound on nucleon-nucleon TRNI vs TRI interactions. First calculations,...

We study the quantum many-body dynamics and entropy production triggered by an interaction quench in a system of $N=10$ interacting identical bosons external one-dimensional harmonic trap. The multiconfigurational time-dependent Hartree method for (MCTDHB) is used solving Schr\"odinger equation at high level accuracy. consider measures such as Shannon information entropy, number principal components, occupation that are computed from basis set MCTDHB. These quantify relevant physical...

Embedded random matrix ensembles generated by interactions (of low body rank and usually two-body) in the presence of a one-body mean field, introduced nuclear structure physics, are now established to be indispensable describing statistical properties large number isolated finite quantum many-particle systems. Lie algebra symmetries interactions, as identified from shell model interacting boson model, led introduction variety embedded (EEs). These with field chaos generating two-body...

Group theoretical aspects of the extended interacting boson model (gIBM) with s, d, and g bosons are discussed. The basis states branching rules given for seven dynamical symmetries. Casimir operators their eigenvalues obtained enable one to write down energy formulas.

Using the ergodicity principle for expectation values of several types observables, we investigate thermalization process in isolated fermionic systems. These are described by two-body random ensemble, which is a paradigmatic model to study quantum chaos and especially dynamical transition from integrability chaos. By means exact diagonalizations analyze relevance eigenstate hypothesis as well influence other factors, such energy structure initial state, or dimension Hilbert space. We also...

Abstract Coherent elastic neutrino–nucleus scattering (CE ν NS) is a neutral-current low-energy electro-weak reaction-channel detected recently by the COHERENT experiment at Oak Ridge National Laboratory (ORNL), USA, in Spallation Neutron Source facility. The extremely weak signal on CsI detector of first and liquid Ar repeated energy-recoil due to interaction, where nucleus elastically scattered as whole while simultaneously neutrino goes out. Today, several promising nuclear detectors are...

The event rates for WIMP-nucleus and neutrino-nucleus scattering processes, expected to be detected in ton-scale rare-event detectors, are investigated. We focus on nuclear isotopes that correspond the target nuclei of current future experiments looking WIMP- events. structure calculations, performed context deformed shell model, based Hartree-Fock intrinsic states with angular momentum projection band mixing both elastic inelastic channels. Our predictions high-recoil-energy tail show...