نتایج جستجو برای: dd neutron generator

تعداد نتایج: 96054  

2005
G. Jervan A. Markus J. Raik R. Ubar

* This work has been supported by the Estonian Science Foundation grant G-1850 ABSTRACT: A hierarchical test generation approach to digital circuits, which uses Register-Transfer (RT) and gate level model descriptions, is presented. The proposed test generator implements a novel test generation technique based on Decision Diagram (DD) models. Uniform modeling procedures are used on both levels,...

Journal: :basic and clinical cancer research 0
hoda darestani 1nuclear engineering department, science and research unit, azad university, tehran, i.r. iran hassan ali nedaie radiotherapy oncology department, cancer institute, tehran university of medical sciences, tehran, i.r. iran azim arbabi radiation oncology department, imam hussein medical center, faculty of medicine, shahid beheshti university of medical sciences, tehran, i.r. iran kheirollah mohammadi nuclear engineering department, amirkabir industrial university, tehran, i.r. iran mahmood allahverdi radiotherapy oncology department, cancer institute, tehran university of medical sciences, tehran, i.r. iran arjang shahvar agricultural, medical and industrial research school, karaj, i.r. iran

background : in spite of clinically useful photon and electron beams, high energy linacs produce secondary particles such as neutrons (photo-neutron production). neutrons have important roles during treatment with high energy photons in terms of protection and dose escalation. in this project, neutron dose equivalent of 18 mv varian accelerators is calculated by tld600 and tld700. materials and...

Journal: :The Review of scientific instruments 2012
Arun Persaud Ole Waldmann Rehan Kapadia Kuniharu Takei Ali Javey Thomas Schenkel

Field ionization as a means to create ions for compact and rugged neutron sources is pursued. Arrays of carbon nano-fibers promise the high field-enhancement factors required for efficient field ionization. We report on the fabrication of arrays of field emitters with a density up to 10(6) tips∕cm(2) and measure their performance characteristics using electron field emission. The critical issue...

Journal: :Journal of radiation research 1995
S Endo M Hoshi H Tauchi S Takeoka K Kitagawa S Suga N Maeda K Komatsu S Sawada E Iwamoto

A neutron generator (HIRRAC) for use in radiobiology study has been constructed at the Research Institute for Radiation Biology and Medicine, Hiroshima University (RIRBM). Monoenergetic neutrons of which energy is less than 1.3 MeV are generated by the 7Li(p,n)7 Be reaction at proton energies up to 3 MeV. The protons are accelerated by a Schenkel-type-accelerator and are bombared onto the 7Li-t...

2010
S. Antić

Many properties of nuclei and nuclear matter can be well described with modern phenomenological energy density functionals (EDF). A particular strong constraint represents the observation of two pulsars of approx. two solar masses [1]. It requires a sufficiently stiff equation of state (EoS) at densities well above the nuclear saturation density. Since nucleons of large momenta interact with th...

2002
HENRY C. GRIFFIN

Fast neutrons are useful for activation analysis of several light elements. For example, oxygen analyses are routinely made in our reactor laboratory and elsewhere by the 160(n, p)]6N reaction. The threshold for this reaction is over 10 MeV. Napier et al. ~) have described a device which was intended to convert thermal neutrons into 14 MeV neutrons by the reaction sequence 6Li(n, o~)3H ... 2H(3...

Journal: :iranian journal of radiation research 0
h.r. vega-carrillo unidad académica de estudios nucleares, universidad autonoma de zacatecas, zacatecas, zac. méxico r. barquero departamento de radiología del hospital universitario rio hortega, valladolid, spain g.a. mercado unidad academica de matematicas universidad autónoma de zacatecas, zacatecas, zac. méxico

background: in high-intensity, mixed and pulsed neutron fields the use of spectrometers or area monitors with active detectors is useless in these conditions neutron measuring devices must have a passive detector. here a passive neutron area monitor with cr39 track detector was designed and the response was calculated. materials and methods: the response of a passive neutron area monitor with c...

Journal: :Agriculture 2021

The purpose of the study was to construct an electrostatic insect-capturing apparatus that could be applied a drone (quadcopter). For this purpose, double-charged dipolar electric field screen (DD-screen) constructed using oppositely charged insulator tubes then attached drone. charging, inner surface coated with conductive paste and linked negative or positive voltage generator. opposite charg...

ژورنال: سنجش و ایمنی پرتو 2019

Neutron radiography is an unique, advanced and useful non-destructive test method in various industries and researches. Nuclear reactors are powerful and stable neutron sources for the neutron radiography system. In this research, the MNSR research reactor has been used as a neutron source for a neutron radiography system, and its neutron beam parameters have been evaluated. Also, using the dir...

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