by Dept. of Energy, Sandia Laboratories, for sale by the National Technical Information Service] in Albuquerque, N. M, [Springfield, Va .
Written in English
|Statement||David L. Hanson, Lyle W. Kruse, Sandia Laboratories ; prepared by Sandia Laboratories for the United States Department of Energy|
|Series||SAND ; 79-2196|
|Contributions||Kruse, Lyle W, United States. Dept. of Energy, Sandia Laboratories|
|The Physical Object|
|Pagination||44 p. :|
|Number of Pages||44|
1. Introduction. In fusion neutronics, the spectral neutron fluence (or flux) is the central quantity to be investigated. The neutron flux penetrating the shield blanket and the reactor vessel is the long-range source term for energy deposition where the neutron start energy of 14 MeV is dissipated by successive elastic and inelastic scattering down to thermal energies and by nuclear by: Neutron activation analysis (NAA) is the nuclear process used for determining the concentrations of elements in a vast amount of materials. NAA allows discrete sampling of elements as it disregards the chemical form of a sample, and focuses solely on its nucleus. The method is based on neutron activation and therefore requires a source of sample is bombarded with neutrons, causing. Neutron measurements with and without water phantom in the beam. MATERIALS AND METHODS We describe measurements of neutron spectra around a scanning proton beam. Measurements were made using the Nested Neutron Spectrometer (Detec Inc., Gatineau, QC) operated in pulsed and current mode (Dubeau et al., ; Maglieri et al., ). Measuring neutron spectra in radiotherapy using the nested neutron spectrometer Robert Maglieri, Angel Licea, Michael Evans, Jan Seuntjens, and John Kildea Citation: Medical Phys
Neutron Activation Analysis (NAA) is a sensitive analytical technique which useful for performing both qualitative and quantitative multi-element analysis of major, minor, and trace elements in. radiotherapy machine neutron measurements prove to be very difficult because of unwanted electron accelerators are pulsed at a repetition rate of to pulses per second with a pulse duration of 1 to 10 microsecond. The photon leakage,although shielded to a large extent by the massive shielding in the treatmentFile Size: KB. uncertainties in the measurements of neutron dose. The principles of neutron production were investigated both for radio-therapy with photons and carbon ions. During photon radiotherapy, neu-trons are produced through photonuclear reactions. The majority of the neutrons are produced in the target and the collimators in the linear accel-. radiotherapy. To quantify neutron production, in-room measurements have traditionally been carried out using Bonner sphere systems (BSS) with activation foils and TLDs. In this work, a recently developed active detector, the nested neutron spectrometer (NNS), was tested in radiotherapy by:
A wireline log of the yields of different elements in the formation, measured using induced gamma ray spectroscopy with a pulsed neutron elemental yields are derived from two intermediate results: the inelastic and the capture inelastic spectrum is the basis for the carbon-oxygen log, and can also give information on other elements. A complete pulsed neutron system has been developed for use in reactor reactivity measurements. The probe unit is small enough to fit into a reactor instrumentation pipe. The pulse‐to‐pulse variation in neutron output has been kept to a minimum by regulating the gas pressure in the neutron tube and by maintaining the same pulsing conditions regardless of pulsing by: 8. Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF. The fast and maximum thermal neutron fluxes from the DD neutron generator at the University of Sharjah were experimentally measured by the activation technique using different neutron reactions. The thermal and fast neutron fluxes were found to be × 10 6 and × 10 7 n/cm 2 s, respectively. This was done to verify the modeling Cited by: 4.