We present here the first results of two-dimensional hydrodynamical simulations of the neutrino-heating phase in the collapsed core of a 15M⊙ star, where the neutrino transport is treated with a variable Eddington factor method for solving the Boltzmann transport equation, and the neutrino interactions include nucleon-nucleon bremsstrahlung, nucleon recoils and correlations, and weak-magnetism ...

Corrections to the zeroth-approximation cross-section formula for antineutrino capture on protons at nuclear reactors are evaluated. They include recoil corrections 1 I M of three kinds. The true recoil correction to the cross section is negligible. The weak-magnetism-axial-vector interference is sizable, decreasing the cross section by -2% for 5-MeV positrons. One also has to include the recoi...

Imaging the magnetic fields around a non-magnetic impurity can provide a clear benchmark for quantifying the degree of magnetic frustration. Focusing on the strongly frustrated J1-J2 model and the spatially anisotropic J1a-J1b-J2 model, very distinct low energy behaviors reflect different levels of magnetic frustration. In the J1-J2 model, bound magnons appear trapped near the impurity in the g...

Articles you may be interested in Electrical resistivity study of La, B doped nanocrystalline superconducting vanadium nitride Nuclear magnetic resonance studies on the surface magnetism of vanadium ultrafine particles (abstract) The temperature dependence of the critical fields of VaGa has been measured up to 70 kO~ ~sing ac and dc magnetization techniques. For a material with a transition wid...