Simulations of isotope-production irradiations of targets in the radiation environments of fission reactors or particle accelerators require the evaluation of proton and/or neutron particle fluxes within the target and the integration of these with appropriate cross-section data. In fission reactors, proton fluxes are typically considered negligible and the approach reduces to neutron reactions...

0022-3115/$ see front matter 2010 Elsevier B.V. A doi:10.1016/j.jnucmat.2010.12.077 ⇑ Corresponding author. Tel.: +1 608 263 5093; fax E-mail address: [email protected] (M.E. Sawan Radiation damage parameters in SiC/SiC composite structures are determined in both magnetic (MFE) and inertial (IFE) confinement fusion systems. Variations in the geometry, neutron energy spectrum, and pulsed natur...

Production cross sections and excitation functions of neutron deficient isotopes of U, Pa and Th have been measured in the reaction of 22 N e+ 208 P b. The comparison of experimental production cross sections of uranium isotopes with the neutron number 126 ≤ N ≤ 134 to the values calculated using statistical model of nuclear deexcitation has been carried out. There is shown, that none of the co...

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...

Actually, the design of more powerful next-generation secondary-beam facilities is being intensively discussed. The main challenge is the production of neutron-rich isotopes, because the neutron-drip line has only been reached for the lightest elements. The traditional way for producing neutronrich nuclei is fission of actinides. Another approach introduced recently, based on cold fragmentation...

We have measured the barometer coefficient of cosmic ray neutron production at sea level and find the value —9,25% ± 0,20/cmHg. We have shown that there is no diurnal variation of neutron production of amplitude greater than about 0,4 %. The effects of the large solar flare of November 19th, 1949 on cosmic ray neutrons were much greater than on ionising cosmic rays at sea level; the maximum fac...

A 14 MeV neutron generator described in this paper.Neutrons are produced in D-T, D-D,T-T reactions. The production of 14 MeV neutrons from DD neutrons generator resulting from tritium build up from d(d,p)t reaction in the target under 30mA, 300 KeV deuteron beam, bombarding a water-cooled, rotating target, size of beam spot on target is 1.8 cm is obtained. An estimate of the capital cost 14 MeV...

An enhancement for the η production in proton-neutron collisions as compared with that in proton-proton scattering has been recently observed. We present a calculation for the production cross section, in proton-neutron collisions near threshold, within instanton model for the QCD vacuum and show that a specific flavor dependent nonperturbative quark-gluon interaction related to instantons is a...

An enhancement for the η production in proton-neutron collisions as compared with that in proton-proton scattering has been recently observed. We present a calculation for the production cross section, in proton-neutron collisions near threshold, within instanton model for the QCD vacuum and show that a specific flavor dependent nonperturbative quark-gluon interaction related to instantons is a...

We report on a comparison study of the Monte Carlo packages GEANT4 and FLUKA for simulating neutron production by muons penetrating deep underground. GEANT4 is found to generate fewer neutrons at muon energies above ∼100 GeV, by at most a factor of 2 in some materials, which we attribute mainly to lower neutron production in hadronic cascades. As a practical case study, the muon-induced neutron...