نتایج جستجو برای: neutron capture

تعداد نتایج: 162999  

1999
J. M. Verbeke Y. Lee K. N. Leung J. Vujic M. D. Williams L. K. Wu N. Zahir

Radio-frequency (RF) driven ion sources are being developed in Lawrence Berkeley National Laboratory (LBNL) for sealed-accelerator-tube neutron generator application. By using a 5-cm-diameter RF-driven multicusp source H yields over 95% have been achieved. These experimental findings will enable one to develop compact neutron generators based on the D-D or D-T fusion reactions. In this new neut...

1997
S. Goriely

The radiative direct capture of neutrons is calculated within the potential model. The uncertainties related to the choice of the neutron-nucleus interaction potential and the prediction of the excitation spectrum in the residual nucleus are discussed. The allowed direct E1-type transitions to all the excited states predicted by a combinatorial model of nuclear level densities are calculated wi...

2012
A. M. Hurst B. W. Sleaford R. B. Firestone N. C. Summers Z. Revay L. Szentmiklosi S. Basunia T. Belgya J. E. Escher M. Krticka

The neutron-capture reaction is of fundamental use in identifying and analyzing the γ-ray spectrum from an unknown object as it gives unambiguous information on exactly what isotopes are absorbing the neutrons. There are many applications where this can be used passively (nonproliferation), or actively where an external neutron source is used to probe an unknown assembly (planetary studies). Th...

Journal: :iranian journal of medical physics 0
mona zolfaghari department of physics, faculty of science, k. n. t university of technology, tehran, iran mahmood sedaghatizadeh department of physics, faculty of science, k. n. t university of technology, tehran, iran

introduction electron linear accelerator (linac) can be used for neutron production in boron neutron capture therapy (bnct). bnct is an external radiotherapeutic method for the treatment of some cancers. in this study, varian 2300 c/d linac was simulated as an electron accelerator-based photoneutron source to provide a suitable neutron flux for bnct. materials and methods photoneutron sources w...

2017
A. D. Harken Brian W. Robertson

Solid-state neutron detectors based only on boron-rich semiconductors are of interest for their potential to provide the highest thermal neutron detection efficiencies of any solid-state neutron detectors. A simple physical model, recently shown to generate thermal neutron capture product spectra that agree quantitatively with full-physics GEANT4 simulation, is used to compare the capture produ...

2015
Tanja Peters Catrin Grunewald Matthias Blaickner Markus Ziegner Christian Schütz Dorothee Iffland Gabriele Hampel Thomas Nawroth Peter Langguth

BACKGROUND Neutron capture therapy for glioblastoma has focused mainly on the use of (10)B as neutron capture isotope. However, (157)Gd offers several advantages over boron, such as higher cross section for thermal neutrons and the possibility to perform magnetic resonance imaging during neutron irradiation, thereby combining therapy and diagnostics. We have developed different liposomal formul...

Introduction Electron linear accelerator (LINAC) can be used for neutron production in Boron Neutron Capture Therapy (BNCT). BNCT is an external radiotherapeutic method for the treatment of some cancers. In this study, Varian 2300 C/D LINAC was simulated as an electron accelerator-based photoneutron source to provide a suitable neutron flux for BNCT. Materials and Methods Photoneutron sources w...

ژورنال: سنجش و ایمنی پرتو 2015

In Boron Neutron Capture Therapy (BNCT), the patient is injected with a tumor localizing drug containing a boron-10 compound. Then the tumor region is irradiated with an appropriate neutron beam. Lethal dose deposited by 10B (n, α)7Li reaction products cause destruction of the tumor cell. Recently, a lot of efforts have been done for the use of Tehran Research Reactor (TRR) for BNCT and a...

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