The NBS Standard Thermal Neutron Flux has been calibrated in terms of the B(n, a) cross section [De Juren and Rosenwasser, 1954] and of the gold thermal neutron capture cross section [Mosburg and Murphey, 1961]. The present calibration, based on absolute counting of Au activity by the 4:ir@-y coincidence method, represents part of a program of international comparisons of thermal neutron flux d...

The J =0 ground state of a drop of 8 neutrons and the lowest 1/2 and 3/2 states of 7-neutron drops, all in an external well, are computed accurately with variational and Green's function Monte Carlo methods for a Hamiltonian containing the Argonne v18 two-nucleon and Urbana IX three-nucleon potentials. These states are also calculated using Skyrme-type energy-density functionals. Commonly used ...

Charge form factors for many nuclei are accurately measured by electron scattering. These data can be analyzed by model-independent methods, such as the Fourier–Bessel expansion fit, to extract numerical values for the charge density as a function of radius. These results serve as one of the fundamental tests of nuclear models. The neutron densities are not nearly so well known from experiment ...

In former papers we showed that during the decay of a neutron star’s magnetic field under the influence of the Hall–drift, an unstable rise of small–scale field structures at the expense of the large–scale background field may happen. This linear stability analysis was based on the assumption of a uniform density throughout the neutron star crust, whereas in reality the density and all transpor...

background: several landmine detection methods, based on nuclear techniques, have been suggested during the recent years. neutron energy moderation, neutron-induced gamma emission, neutron and gamma attenuation, and fast neutron backscattering are nuclear-based methods used for landmine detection. the aim of this study is to use backscattered neutron for landmine detection. materials and method...

Properties, structure, and thermal evolution of neutron stars are determined by the equation of state of stellar matter. Recent data on isospin-diffusion and isoscaling in heavy-ion collisions at intermediate energies as well as the size of neutron skin in Pb have constrained considerably the density dependence of the nuclear symmetry energy and, in turn, the equation of state of neutron-rich n...

The Relativistic Mean Field (RMF) theory is applied to the analysis of groundstate properties of Ne, Na, Cl and Ar isotopes. In particular, we study the recently established proton skin in Ar isotopes and neutron skin in Na isotopes as a function of the difference between the proton and the neutron separation energy. We take the TMA effective interaction in the RMF Lagrangian, and describe pair...

We calculate the neutron-60Ca S-wave scattering phase shifts using state of the art coupled-cluster theory combined with modern ab initio interactions derived from chiral effective theory. Effects of three-nucleon forces are included schematically as density dependent nucleon-nucleon interactions. This information is combined with halo effective field theory in order to investigate the 60Ca-neu...