Current accelerator-based neutron source concepts for boron neutron capture therapy (BNCT) are centered on the lithium (p,n) reaction. The near lithium threshold source concept uses proton energies <~100 keV above the reaction threshold energy (1.88 MeV). For deeply seated brain tumors, epithermal (1 eV to 10 keV) ...
NASA Astrophysics Data System (ADS)
Fission neutron spectra from neutron induced fission in 235U and 239Pu for energies below that of the neutron inducing fission have been measured. The spectra were obtained for 1.5 MeV and 2.5 MeV incident neutrons. Previous accelerator-based fission neutron spectra ...
Energy Citations Database
A comprehensive program is in progress at the Los Alamos National Laboratory for the development of sensitive, practical, nondestructive assay techniques for the quantification of low-level transuranics in bulk solid wastes. The program encompasses a broad range of techniques, including sophisticated active and passive gamma-ray spectroscopy, passive ...
DOE Information Bridge
Shielded special nuclear material (SNM) is very difficult to detect and new technologies are needed to clear alarms and verify the presence of SNM. High-energy photons and neutrons can be used to actively interrogate for heavily shielded SNM, such as highly enriched uranium (HEU), since neutrons can penetrate gamma-ray shielding and ...
A complete assay system for 208-liter barrels contianing transuranic wastes has been developed. The system consists of an 8-MeV commercial electron accelerator, neutron moderating cavity housing the waste barrel and containing neutron detectors, high resolution germanium gamma spectrometer, and x-ray radiography camera (both film and ...
A source for boron neutron capture therapy (BNCT) comprises a body of photoneutron emitter that includes heavy water and is closely surrounded in heat-imparting relationship by target material; one or more electron linear accelerators for supplying electron radiation having energy of substantially 2 to 10 MeV and for impinging such radiation on the target material, whereby ...
DOEpatents
A comprehensive program is currently in progress for the development of sensitive, practical nondestructive assay techniques for the quantification of low level transuranics in bulk solid wastes. This program encompasses a broad range of nuclear and nonnuclear techniques including sophisticated passive gamma-ray and passive neutron detection systems, ...
Using high current, cw linear accelerator technology, a spallation neutron source can achieve much higher average intensities than existing or proposed pulsed spallation sources. With about 100 mA of 300 MeV protons or deuterons, the accelerator based neutron research facility (ABNR) would initially achieve the ...
. Scott. The design and testing high power lithium target for accelerator-based boron neutron capture therapy. Research and Development in Neutron Capture Therapy, Eds.: W. Sauerwein, R. Moss, and A. Wittig . - , , . , . [1] B. Bayanov, et al. Accelerator based neutron source for the ...
E-print Network
At Los Alamos, a comprehensive program is underway for the development of sensitive, practical, nondestructive assay techniques for the quantification of low-level transuranics in bulk solid wastes. The program encompasses a broad range of techniques, including sophisticated active and passive gamma-ray spectroscopy, passive neutron detection systems, ...
... Descriptors : *GAMMA RAY SPECTRA, *NEUTRON CAPTURE GAMMA RAYS, *THERMAL NEUTRONS, NEUTRON CROSS SECTIONS ...
DTIC Science & Technology
... NEUTRONS), SHIELDING, FAST NEUTRONS, FISSION NEUTRONS, LITHIUM FLUORIDES, THERMOLUMINESCENCE, GLASS, CALCIUM ...
Fast and thermal neutron intensity distributions have been measured at an accelerator based prompt gamma ray neutron activation analysis (PGNAA) setup. The setup is built at the 350 keV accelerator laboratory of King Fahd University of Petroleum and Minerals (KFUPM). The setup is mainly ...
Oak Ridge National Laboratory Physics Division The Oak Ridge Electron Linear Accelerator Pulsed Neutron Source The ORELA is a powerful electron accelerator-based neutron source...
Science.gov Websites
for neutron capture therapy is under construction now at the Budker Institute of Nuclear Physics, NovosibirskAccelerator based neutron source for neutron capture therapy B. Bayanov, Yu. Belchenko, V. Belov, V Physics, Novosibirsk, Russia The Budker Institute of Nuclear Physics (Novosibirsk) and ...
Several investigators have suggested that a charged particle accelerator with light element reactions might be able to produce enough epithermal neutrons to be useful in Neutron Capture Therapy. The reaction choice so far has been the Li(p,n) reaction with protons up to 2.5 MeV. A moderator around the target would reduce the faster ...
In this work we present an optimized neutron beam shaping assembly for epithermal Accelerator-Based Boron Neutron Capture Therapy (AB-BNCT) and discuss the simulations leading to its design.
Recently there has been a great deal of interest in studying possible methods for remote non-destructive material composition testing, for example, for cargo identification at transportation, neutron logging etc., by means of nuclear detection (D.R. Brown, T. Gozani, Nucl. Instr. and Meth. B 99 (1995) 753). Of current concern are the applications of pulsed fast ...
... of infinite homogeneous air-transport calculations of neutrons, and prompt and ... was used to calculate neutron, neutron-induced gamma ...
... NEUTRON CAPTURE GAMMA RAYS, GAMMA RAY SPECTRA), (*GAMMA RAY SPECTRA, TABLES(DATA)), THERMAL NEUTRONS, ENERGY ...
... Title : Neutron and Gamma-Ray Fluxes for Pumping Lasers. ... ray fluxes of interest for studies of neutron pumped gamma lasers and gamma ...
... NUCLEAR EXPLOSIONS, AIRBURST), (*NEUTRON TRANSPORT THEORY, AIR), SHIELDING, FISSION NEUTRONS, GAMMA RAYS, FAST ...
... GAMMA COUNTERS, GERMANIUM, RESOLUTION, ACCURACY, NEUTRON BEAMS, THERMAL NEUTRONS, BERYLLIUM, IRON, SCANDIUM ...
... Title : Experimental Studies of the Neutron and Gamma Shielding Provided by Field Fortifications from a 14-Mev Neutron Source,. ...
Accelerator-based intense epithermal neutron sources for Neutron Capture Therapy (NCT) have been considered as an alternative to nuclear reactors. Lithium (Li) has generally received the widest attention for this application, since the threshold energy is low and neutron yield is high. Because of the poor thermal ...
PubMed
... MATERIALS, NEUTRON DETECTORS, NEUTRON CAPTURE, THERMAL NEUTRONS, NONLEAKAGE PROBABILITY, THERMAL REACTORS. ...
... NEUTRON CAPTURE GAMMA RAYS, IONOSPHERIC PROPAGATION), (*THERMAL NEUTRONS, DENSITY), NEUTRON COUNTERS, FAST ...
... (Author). Descriptors : *NEUTRON CAPTURE GAMMA RAYS, GAMMA RAY SPECTRA, THERMAL NEUTRONS, ALUMINUM, GAMMA COUNTERS ...
The technologies that are being utilized to design and build the target systems for a state-of-the-art accelerator-based neutron source, the Spallation Neutron Source (SNS), are discussed. Emphasis is given to the technology issues that present the greate...
National Technical Information Service (NTIS)
... those due to X-rays, neutrons, gammas, induced ... of effects due to neutrons and gammas ... COMPUTER PROGRAMMING), NEUTRON FLUX, GAMMA ...
The Idaho National Laboratory, along with Los Alamos National Laboratory and the Idaho State University's Idaho Accelerator Center, are developing electron accelerator-based, photonuclear inspection technologies for the detection of shielded nuclear material within air-, rail-, and especially, maritime-cargo transportation containers. This paper describes a developing ...
A pilot accelerator-based source of epithermal neutrons, which is intended for wide application in clinics for boron neutron capture therapy, has been constructed at the Budker Institute of Nuclear Physics (Novosibirsk). A stationary proton beam has been obtained and near-threshold neutron generation regime has ...
UNH was assigned the responsibility to use their accelerator neutron measurements to verify the TASC response function and to modify the TASC fitting program to include a high energy neutron contribution. Direct accelerator-based measurements by UNH of th...
We are here today to testify on the Department of Energy's (DOE) management of the Spallation Neutron Source Project (project). This billion- dollar complex, to be built in Oak Ridge, Tennessee, is designed to be the world's most powerful accelerator-base...
All accelerator-based fast-neutron contraband interrogation systems have many closely interrelated subsystems, whose performance parameters will be critically interdependent. For optimal overall performance, a systems analysis design approach is required....
Boron Neutron Capture Therapy (BNCT) is a promising binary treatment modality for high-grade primary brain tumors (glioblastoma multiforme, GM) and other cancers. BNCT employs a boron-10 containing compound that preferentially accumulates in the cancer ce...
Boron neutron capture therapy is an experimental binary cancer radiotherapy modality in which a boronated pharmaceutical that preferentially accumulates in malignant tissue is first administered, followed by exposing the tissue in the treatment volume to ...
