This experience made it possible to place greater focus on improving the overall performance of the new instrumentation from the outset of the design phase. Highenergy gammaray spectroscopy, enabling reliable chemical analyses. Muon and neutroninduced background in gammaray spectrometry. A new capture and inelastic spectroscopy tool takes. We use cookies to make interactions with our website easy and meaningful, to better understand the use of our services, and to tailor advertising. Cosmicray muon and cosmicneutroninduced background was accurately measured, and is discussed. Database of prompt gamma rays from slow neutron capture for.
Acceleratorbased sources, such as deuteriumdeuterium dd and deuteriumtritium dt fusion neutron generators, provide the electronic control of isotropic. Database of prompt gamma rays from slow neutron capture. Cd are a higher neutron capture cross section and lower toxicity. Cosmic rays interact with the surface of a planetary body and produce a cascade of secondary particles, such as neutrons. Field test results of a new neutron induced gamma ray spectroscopy. Lowbackground, digital gammaray spectrometer with bege. A new neutroninduced gammaray spectroscopy tool for. Capture credit capc based on neutroninduced gamma ray spectroscopy nigs is proposed to confirm the subcriticality of fuel debris in which nuclear fuel and structural materials are comelted or mixed. By the ratio, we can credit the negative reactivity inserted by the capture reactions.
Expert with neutron and neutroninduced gamma ray spectroscopy measurements. The minimum requirement an evaluation software must meet to. For the neutroninduced gamma ray spectroscopy data acquired by litho scanner service, our multidisciplinary interpretation experts collaborate with you as needed, using advanced workflows and employing a multimineral solver to provide the most comprehensive petrophysical results. Gem logging software was performed on the summed spectrum, which gave the. Control of the analyser is performed with dedicated readout software. Proceedings volume 9593 hard xray, gammaray, and neutron detector physics xvii. Pdf field test results of a new neutron induced gamma ray. Gamma ray spectrum from thermal neutron capture on. Software savvy techlog, including python scripting. Neutron capture is a nuclear reaction in which an atomic nucleus and one or more neutrons collide and merge to form a heavier nucleus. By nigs, rates of some capture reactions can be measured in relation to fission reactions.
The most significantly emitted photon and electron reaction products induce a. The principles of neutroninduced capture gamma ray spectroscopy at the heart of the gem measurement have been understood and practiced in the industry for several years. Capture spectroscopy basics activation, or induced gamma ray spectroscopy, logs record concentrations of individual chemical elements derived from the characteristic energy levels of gamma rays emitted by a nucleus that has been activated by neutron bombardment. Because elements excited by neutrons emit characteristic gamma rays, such spectra can be analyzed for elemental concentrations. Neutron detection based on neutroninduced gamma rays. Since neutrons have no electric charge, they can enter a nucleus more easily than positively charged protons, which are repelled electrostatically neutron capture plays an important role in the cosmic nucleosynthesis of heavy elements. Gammaray spectra are acquired with a 16384channel analogdigital. For bulk samples, elastic scattering of the neutrons before the capture reaction may also play an. We have achieved an overall background reduction by a factor of 9436 relative to the ambient level. The use of neutroncapture gamma rays as a method of elemental analysis was. Zerkin for the software developments associated with the retrieval system.
Accurate answers are delivered for even the most complex mineralogy. Concept of capture credit based on neutroninduced gamma ray spectroscopy. Analysis of 14mev neutron induced gammaray spectra using. A final class of neutron logs, neutroninduced gamma ray logging, records the energy spectra of the induced gamma rays. Hard xray, gammaray, and neutron detector physics xvii.
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