Keywords: Special nuclear materials Cosmic-ray radiation Monte Carlo simulation Joint and marginal probability density functions Multiplicity correlation a b s t r a c t The challenge in detection and identification of Special Nuclear Materials (SNM) is to discriminate between the time-correlated neutrons and gamma-rays emitted from SNM and those originating from non-correlated or differently-c...

A light-weight portable neutron survey meter was developed using a mixed organic gas counter for dose management at nuclear power plants and accelerator facilities. This survey meter, NSN31041, is ~2 kg in weight and W160×H250×L300 mm(3) in size, which is capable of measuring neutron ambient dose equivalent rate from thermal to 15 MeV neutrons. The neutron energy response of the survey meter is...

Fireballs with high energy per baryon rest mass (η > η∗ ∼ 400) contain a relatively slow neutron component. We show here that in this situation the thermal history of fireballs is very different from the standard adiabatic cooling. INTRODUCTION Baryonic matter ejected in a GRB explosion is partially composed of free neutrons (see [1] and [2] for detailed calculations and references). This has a...

This article was originally intended as a brief introduction to the article by Richard Hull on the Farnsworth/Hirsch “fusor.” However, as there has been some interest by a number of subscribers in neutron generators, I decided to provide a somewhat more lengthy tutorial on the reactions that produce neutrons, some practical applications of neutrons, and a few of the various types of devices tha...

Single Event Effects are errors in electronic circuits caused by cosmic particles present in the natural environment. The result of a particle strike may corrupt the logical state at a target node or cause erroneous glitches. In most instances, the errors are random and non-destructive. The severity of these errors, however, cannot be discounted as exemplified by commercial instances [21, 22]. ...

Fast neutrons were used in the management of thirty patients with advanced salivary gland tumors. Twentytwo patients are the subject of this analysis. In only seven patients neutrons were used as the primary mode of management. The remaining patients either had recurrent disease after surgery and/or radiation, or received post-operative treatment with neutrons. After a minimum follow-up of one ...

Low energy nuclear reactions in the neighborhood of metallic hydride surfaces may be induced by ultra-low momentum neutrons. Heavy electrons are absorbed by protons or deuterons producing ultra low momentum neutrons and neutrinos. The required electron mass renormalization is provided by the interaction between surface electron plasma oscillations and surface proton oscillations. The resulting ...