Background: In neutron interaction with matter and reduction of neutron energy due to multiple scatterings to the thermal energy range, increasing the probability of thermal neutron capture by neutron captures makes dose enhancement in the tumors loaded with these materials. Objective: The purpose of this study is to evaluate dose distribution in the presence of 10B, 157Gd and 33S neutron...

Introduction: Neutrons have many applications in various fields, such as medicine. The important application of neutron in medical science is in Boron Neutron Capture Therapy (BNCT). Because of this, determination of neutron dose and flux is critical for the health maintaining of workers and patients exposed to this beam. The neutron radioisotope sources produce gamma rays in ...

The double ionization of He by either photon impact or bare ion impact are simple examples of the quantal three-body Coulomb breakup problem. For example, the double photoionization of He near threshold produces two slow moving continuum electrons in the Coulomb field of an alpha particle, which is extremely difficult for perturbation theory to handle. On the other hand, various non-perturbativ...

The criticality safety control technique is required for the fuel debris removal from Fukushima Dai-Ichi Nuclear Power Station which experienced a severe accident. subcriticality estimation expected to be done with only limited information about while primary containment vessel internal survey work ongoing. purpose of this study develop method called virtual neutron capture method. neutrons sur...

A pairing model for nucleons, introduced by Richardson in 1966, which describes proton-neutron pairing as well as proton-proton and neutron-neutron pairing, is reexamined in the context of the Quantum Inverse Scattering Method. Specifically, this shows that the model is integrable by enabling the explicit construction of the conserved operators. We determine the eigenvalues of these operators i...

The large spin dependence of the absorption cross section for neutrons by He gas provides a method to polarize neutron beams. For certain applications, such polarized He-based neutron ”spin filters” have advantages over conventional neutron optical polarizing methods. Spin filters operate at all neutron wavelengths, can cover a large angular range and/or a large energy range, and decouple neutr...

Prompt gamma-ray neutron activation analysis (PGNAA) is now a proven method for the identification of chemical warfare agents and explosives in military projectiles and storage containers. Idaho National Laboratory is developing a next-generation PGNAA instrument based on the new Ortec Detective mechanically-cooled HPGe detector and a neutron generator. In this paper we review PGNAA analysis of...

Recent experimental results concerning interaction cross sections (σI) are reviewed. σI values have been measured by a transmission method using the fragment separator at GSI. The σI values for B, C, N, O, and F isotopes are presented. By using Glauber-model analysis, the effective matter radii for light neutron-rich nuclei can be deduced. The recently shown magic number, N = 16, near the neutr...