Abstract We describe a project that brings together researchers from atomic physics, nuclear physics and sub-atomic particle to develop high-precision laboratory-scale experiment able search for very weakly coupled sterile neutrinos in the mass range extending 5–10 keV/ c 2 several 100 . Observed neutrino flavor eigenstates are known be quantum mixtures of at least three sub-eV/ eigenstates. There is strong theoretical belief there may exist further higher levels, which, if range, might form...

We present a fully differential study of projectile coherence effects in ionization p + He collisions. The experimental data are qualitatively reproduced by non-perturbative ab initio time-dependent model, which treats the properties terms wave packet. A comparison between first- and higher-order treatments shows that observed interference structures primarily due to coherent superposition different impact parameters leading same scattering angle. Higher-order contributions have significant...

We present a triple differential experimental study of ionization molecular hydrogen by proton impact. By comparing cross-sections obtained for coherent and incoherent projectile beams we were able to extract contributions from interference. Two types distinctly different interferences could be identified. demonstrate that both can separated in the same data set analyzing fixed momentum transfer recoil-ion momentum.

We have performed a kinematically complete experiment on ionization of H2 by 75 keV proton impact for electrons ejected with speed close to the projectile speed. The fully differential data are compared three-body distorted wave and continuum wave—eikonal initial state calculation. Large discrepancies between theory, as well both calculations, found. These probably arise from strong coupling capture channels, which is not accounted theory.

We have measured fully differential cross sections for electron capture in 75 keV $p+{\mathrm{H}}_{2}$ collisions with subsequent dissociation of the intermediate molecular ${\mathrm{H}}_{2}^{+}$ ion by vibrational excitation using different projectile coherence lengths. Data were obtained two orientations as a function scattering angle. Two types interference, single- and two-center identified. The interference structure is phase shifted $\ensuremath{\pi}$ compared to what we expected....

We have measured and calculated fully differential cross sections (FDCS) for dissociative capture in 75-keV $p+{\mathrm{H}}_{2}$ collisions. FDCS were analyzed the kinetic energy release (KER) ranges 0 to 2.1 eV 4 7 two different molecular orientations. In latter range, dissociation is dominated by electronic excitation $2p{\ensuremath{\pi}}_{\mathrm{u}}$ state. Here, we observed two-center interference an orientation plane perpendicular initial beam axis parallel transverse momentum...

We have measured and calculated fully differential cross sections (FDCS) for ionization of helium by 75-keV proton impact. Ejected electrons with a speed close to above the projectile were investigated. This range kinematics represents largely unexplored regime. A high sensitivity FDCS details description few-body dynamics, reported earlier ${\mathrm{H}}_{2}$, was confirmed. peak structure found in an electron angular between regions where so-called binary recoil peaks are usually observed....

We have performed a kinematically complete experiment on ionization of H2 by 75 keV proton impact leading to electrons with speed equal the projectile speed. By comparing cross sections measured coherent and an incoherent beam we were able perform detailed analysis interference effects. found that structure is significantly more damped than for smaller electron energy studied previously. This damping further increased if kinematic conditions are selected which favor strong role...

We have measured fully momentum-analyzed recoiling target ions and scattered projectiles, produced in ionization of He ${\mathrm{H}}_{2}$ by 75 keV proton impact, coincidence. The momentum the ejected electrons was deduced from conservation. From data we extracted differential cross sections as a function polar electron emission angle (for fixed energies) energy angles). Comparison between experiment various distorted wave calculations confirms that under kinematic conditions where...

We have measured fully differential cross sections (FDCS) for ionization in $75\text{\ensuremath{-}}\mathrm{keV}p+{\mathrm{H}}_{2}$ collisions ejected electron speeds close to the projectile speed. The data were analyzed dependence on both emission angle and scattering angle. Pronounced postcollisional effects between electrons observed. Significant differences experiment theory two conceptually very similar theoretical models found. This shows that region of electron-projectile...

We have measured and calculated fully differential cross sections for vibrational dissociation following capture in 75-keV $p+{\mathrm{H}}_{2}$ collisions. For a molecular orientation perpendicular to the projectile beam axis parallel transverse momentum transfer we observe pronounced interference structure. The positions of extrema suggest that term is afflicted with phase shift which depends on scattering angle. However, no significant dependence kinetic-energy release was observed....

We performed a fully differential experimental and theoretical study on ionization of He in intermediate-energy collisions with protons for small projectile coherence length. Data were taken an ejected electron energy corresponding to speed close the (velocity matching). In angular distributions, pronounced double-peak structure, observed previously length much larger than atomic size, is less current data. This observation interpreted terms interference between first-and higher-order...

We have measured fully differential cross sections for dissociative single capture and Coulomb explosion through double in 75 keV $p+{\mathrm{H}}_{2}$ collisions. Data were analyzed fixed kinetic energy releases molecular orientations as a function of scattering angle. Two-center interference was identified capture. The pattern is not inconsistent with the symmetry electronic state affecting phase angle term. No clear signatures single-center observed either process. For at most only very...

Abstract Recent studies of projectile coherence effects in ion-atom collisions are presented. For intermediate-energy proton an extensive literature provides strong support for the importance such effects. In this regime now used as a tool to study few-body dynamics very sensitively. contrast, high-energy ion impact is much sparser and here important role cannot be regarded being established. context, recent claim that COLTRIMS experiments properties determined only by target beam rebutted.

Introduction: Gender-based violence is prevalent globally causing disease and mortality. Violence against women a global public health issue affecting people of all ages genders. This study aimed to find the prevalence gender-based physical in tertiary care center. Methods: A descriptive cross-sectional was conducted center among cases presenting one-stop crisis management Data collected from 14 April 2021 12 2024 after obtaining ethical approval Institutional Review Committee. Convenience...

We present a theoretical study on the energy dispersion of an ultrathin film periodically aligned single-walled carbon nanotubes (SWCNTs) with help Bogoliubov–Valatin transformation. The Hamiltonian is derived using many-particle green function technique in Matsubara frequency formalism. periodic array SWCNTs embedded dielectric comparatively higher permittivity than substrate and superstrate such that SWCNT becomes independent axis quantization but keeps thickness as variable parameter...

We have measured differential yields for double capture and accompanied by ionization in 75 keV p + Ar collisions. Data were taken two different transverse projectile coherence lengths. A small effect of the properties on found capture, but not plus ionization. The results suggest that multiple projectile–target interactions can lead to a significant weakening effects.

We present a theoretical study on the energy dispersion of an ultrathin film periodically-aligned single-walled carbon nanotubes (SWCNTs) with help Bogoliubov–Valatin transformation. The Hamiltonian was derived using many-particle green function technique in Matsubara frequency formalism. periodic array SWCNTs embedded dielectric comparatively higher permittivity than substrate and superstrate such that SWCNT became independent axis quantization but keeps thickness as variable parameter,...