Results 201 to 210 of about 5,026 (252)
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2009 23rd IEEE/NPSS Symposium on Fusion Engineering, 2009
As a part of the FAST (Fusion Advanced Studies Torus) project a neutronic analysis has been performed aimed to design optimization and radiological safety assessment. The neutron emissivity source foreseen for various FAST scenarios has been calculated and used as input for Monte Carlo calculations.
R. Villari +7 more
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As a part of the FAST (Fusion Advanced Studies Torus) project a neutronic analysis has been performed aimed to design optimization and radiological safety assessment. The neutron emissivity source foreseen for various FAST scenarios has been calculated and used as input for Monte Carlo calculations.
R. Villari +7 more
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Radiology, 1953
This paper summarizes the recent work on fast neutron dosimetry done by the Health Physics Division of the Oak Ridge National Laboratory. Neutrons do not ionize directly, but by various reactions with tissue they produce particles which do ionize. In the case of fast neutrons the important reactions are the elastic collisions with hydrogen, carbon ...
G S, HURST, R H, RITCHIE
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This paper summarizes the recent work on fast neutron dosimetry done by the Health Physics Division of the Oak Ridge National Laboratory. Neutrons do not ionize directly, but by various reactions with tissue they produce particles which do ionize. In the case of fast neutrons the important reactions are the elastic collisions with hydrogen, carbon ...
G S, HURST, R H, RITCHIE
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Review of Scientific Instruments, 1949
A simple fast neutron detector suitable for health physics applications has been constructed using two 931A photo-multiplier tubes in coincidence to reduce background. A ``sandwich'' made of Lucite and activated zinc sulfide is used to produce the scintillations.
W G, MOULTON, C W, SHERWIN
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A simple fast neutron detector suitable for health physics applications has been constructed using two 931A photo-multiplier tubes in coincidence to reduce background. A ``sandwich'' made of Lucite and activated zinc sulfide is used to produce the scintillations.
W G, MOULTON, C W, SHERWIN
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A Fast Neutron Source for Radiotherapy
Nature, 1965IN recent discussions1–6 the use of 15-MeV neutrons resulting from the D-T reaction has been suggested for the radiotherapy of tumours. As pointed out by Fowler7 in this respect, two opposing factors play a part in estimates of the possible value of neutrons of various energies, namely, their penetration into tissue and their oxygen enhancement ratio ...
Broerse, J.J., Barendsen, G.W.
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Fast-Neutron Radiobiology and Radiotherapy
1975The application of fast neutrons, negative pions or heavy ions will only provide an advantage for the radiotherapy of cancer if, in comparison with conventional radiations, e.g., X-rays, gamma rays and electrons, better depth-dose and collimation characteristics or specific radiobiological dose response relationships result in greater local control ...
Barendsen, G.W., Broerse, J.J.
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Medical Physics, 2005
An investigation of the therapeutic potential of boron neutron capture (BNC) enhancement of fast neutron therapy utilizing the Harper University Hospital superconducting cyclotron‐produced fast neutron therapy beam is presented. A technique for modification of the fast neutron beam to increase the BNC enhancement is presented along with an evaluation ...
Jay, Burmeister +3 more
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An investigation of the therapeutic potential of boron neutron capture (BNC) enhancement of fast neutron therapy utilizing the Harper University Hospital superconducting cyclotron‐produced fast neutron therapy beam is presented. A technique for modification of the fast neutron beam to increase the BNC enhancement is presented along with an evaluation ...
Jay, Burmeister +3 more
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Fast Neutron Radiotherapy—An Overview
Medical Dosimetry, 1988Fast neutron radiotherapy has been employed worldwide in the last two decades in the treatment of a variety of advanced malignancies. The basic principles behind neutron treatment will be summarized in this article, along with results to date of a number of clinical trials evaluating the effectiveness and toxicity of neutron radiotherapy.
B R, Griffin, G R, Stewart
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Journal of Neutron Research, 2020
In this contribution we describe NEPIR, the fast-neutron irradiation facility under construction at the 70 MeV cyclotron SPES facility of the INFN laboratory of Legnaro (LNL). NEPIR will be constructed in stages, according to the available funds. The initial configuration, based on a thick Be neutron production target, will be operational in 2022; it ...
Mastinu, Pierfrancescoa +6 more
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In this contribution we describe NEPIR, the fast-neutron irradiation facility under construction at the 70 MeV cyclotron SPES facility of the INFN laboratory of Legnaro (LNL). NEPIR will be constructed in stages, according to the available funds. The initial configuration, based on a thick Be neutron production target, will be operational in 2022; it ...
Mastinu, Pierfrancescoa +6 more
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Disintegration of Nitrogen by Fast Neutrons
Nature, 1948THE reactions 147N (np) 146C and 147N (nα) 115B have been investigated using the mono-energetic neutrons, obtained by bombarding a thin heavy-ice target by deuterons (D+D neutrons). With a deuteron energy of 400 keV. and a variation of the angle between the direction of the neutrons used and the beam of impinging deuterons from 34° to 138°, the neutron
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