نتایج جستجو برای: neutron capture

تعداد نتایج: 162999  

Journal: :Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine 2004
Ramon F Alvarez-Estrada Maria L Calvo

We summarize previous researches regarding neutron guides of small transverse cross-section (neutron fibres), smaller than those of the standard hollow guides and collimators employed currently. Those studies may not be widely known in the neutron capture therapy (NCT) community, but they may be interesting for it. Such neutron fibres could allow to deliver and concentrate neutron beams selecti...

2009
V. V. Voronin

In this short note we discuss the possibility to get the constraint on the parameters of short range pseudomagnetic interaction of free neutron with matter from the crystal-diffraction experiment. It is demonstrated that for range of λ < 10 −6 m this constraint can be a few order better than in any other method.

Journal: :Chemical communications 2013
Erkan Firinci Joshua I Bates Ian M Riddlestone Nicholas Phillips Simon Aldridge

A metal templated synthetic approach gives access to [Cp*Fe(CO)(2){B(NMesCMe)(2)CH}][BAr(f)(4)], and represents the first example of coordinative trapping of the elusive [B(NRCMe)(2)CH] fragment.

Background: In neutron interaction with matter and reduction of neutron energy due to multiple scatterings to the thermal energy range, increasing the probability of thermal neutron capture by neutron captures makes dose enhancement in the tumors loaded with these materials. Objective: The purpose of this study is to evaluate dose distribution in the presence of 10B, 157Gd and 33S neutron...

Alireza Sadremomtaz, Peyvand Taherparvar Sepideh Gholami

Introduction: Neutrons have many applications in various fields, such as medicine. The important application of neutron in medical science is in Boron Neutron Capture Therapy (BNCT). Because of this, determination of neutron dose and flux is critical for the health maintaining of workers and patients exposed to this beam. The neutron radioisotope sources produce gamma rays in ...

C. Geng, C. Gong, D. Shu, H. Yu, S. Fatemi, W. Shao, X. Tang,

Background: Boron neutron capture therapy (BNCT) is a binary radiotherapy combining biochemical targeting with neutron irradiation. However, monitoring the boron distribution is a fundamental problem in BNCT. Prompt gamma rays emitted by boron capture reaction can be used to address the issue. Materials and Methods: The general-purpose Monte Carlo toolkits Geant4 and MCNP were used for the simu...

Journal: :The journal of the Japanese Practical Surgeon Society 1981

F. Rahmani, H Khalafi, S.M. Abtahi, S.M.R. Aghamiri,

Background: The aim of this work was to establish how well gel dosimeters performed, as substitutes for brain tissue compared with standard phantom materials such as water, polymethyl-methacrylate (or PMMA), A150 plastic and TE- liquid phantom material for dosimetry of neutron beams in boron neutron capture therapy. Materials and Methods: Thermal neutron fluence, photon dose and epithermal neu...

Journal: :Chemical communications 2012
Chian-Hui Lai Yu-Chuan Lin Fong-In Chou Chien-Fu Liang En-Wei Lin Yung-Jen Chuang Chun-Cheng Lin

A multivalent galactosyl carborane derivative 10 (dendritic glyco-borane, DGB) was synthesized and demonstrated as a potential cell-targeting agent in BNCT with HepG2 cells. DGB 10 improved the delivery of boron to HepG2 cells and neutron irradiation data show DGB 10 with ten-fold improvement at killing the HepG2 cells over BSH.

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