نتایج جستجو برای: neutron yield

تعداد نتایج: 239350  

Journal: :iranian journal of science and technology (sciences) 2009
m. haji-shafeieha

beryllium chemical combination has a considerable effect on the design and fabrication of the241am9be neutron source. in this investigation the beryllium combinations were studied as a generator ofneutrons with various mass percentage, and the neutron yields were also calculated using the results of thealice and srim codes calculations per unit incident charge. the neutron yields of beryllium ...

Journal: :iranian journal of radiation research 0
kakavand 1 department of physics, zanjan university, zanjan, iran ghafourian atomic energy organization of iran, tehran, iran haji-shafeieha 1 department of physics, zanjan university, zanjan, iran

background: miniature neutron sources with high neutron flux have abundant applications in medicine, industry and researches. the most important general characteristic of miniature neutron sources is their diameter which is 3mm in average. in this research, we have surveyed and designed an am-be miniature neutron source fabrication. materials and methods: this investigation resulted in creation...

Ghafourian, Haji-Shafeieha, Kakavand,

Background: Miniature neutron sources with high neutron flux have abundant applications in medicine, industry and researches. The most important general characteristic of miniature neutron sources is their diameter which is 3mm in average. In this research, we have surveyed and designed an Am-Be miniature neutron source fabrication. Materials and Methods: This investigation resulted in creation...

اطاعتی, غلامرضا, امراللهی, رضا, دوست‌محمدی, وحید,

The silver activation counters are commonly used for pulsed-neutron yield measurements especially in plasma focus devices. The counter normally consists of a Geiger-Muller tube along with silver foils and polyethylene (as a moderator), which is calibrated against an Am-Be radioisotope neutron source. The neutrons, after being slowed-down in the polyethylene, activate the silver foils. By measur...

ژورنال: سنجش و ایمنی پرتو 2020

Neutron Generators (NG) are used as a neutron source for different applications. During recent years, major efforts are underway to develop a high yield compact NG. In this way, radiation protection aspects need to be considered during the operation of these high yield NGs. In this paper the neutron effective dose of a NG operator has been calculated using MCNPX Monte Carlo code. The results sh...

2016
Marc Destefano Wayne D. Gray

In complex task domains, such as games, students may exceed their teachers. Such tasks afford diverse means to tradeoff one type of performance for another, combining task elements in novel ways to yield method variations and strategy discoveries that, if mastered, might produce large or small leaps in performance. For the researcher interested in the development of extreme expertise in the wil...

2017
A. S. Malgin

The cosmogenic neutron yield Yn characterizes the matter ability to produce neutrons under the effect of cosmic ray muons with spectrum and average energy corresponding to an observation depth. The yield is the basic characteristic of cosmogenic neutrons. The neutron production rate and neutron flux both are derivatives of the yield. The constancy of the exponents α and β in the known dependenc...

Journal: :The Review of scientific instruments 2012
D T Casey J A Frenje M Gatu Johnson F H Séguin C K Li R D Petrasso V Yu Glebov J Katz J P Knauer D D Meyerhofer T C Sangster R M Bionta D L Bleuel T Döppner S Glenzer E Hartouni S P Hatchett S Le Pape T Ma A MacKinnon M A McKernan M Moran E Moses H-S Park J Ralph B A Remington V Smalyuk C B Yeamans J Kline G Kyrala G A Chandler R J Leeper C L Ruiz G W Cooper A J Nelson K Fletcher J Kilkenny M Farrell D Jasion R Paguio

A magnetic recoil spectrometer (MRS) has been installed and extensively used on OMEGA and the National Ignition Facility (NIF) for measurements of the absolute neutron spectrum from inertial confinement fusion implosions. From the neutron spectrum measured with the MRS, many critical implosion parameters are determined including the primary DT neutron yield, the ion temperature, and the down-sc...

2014
A. Loveless

Neutrons are commonly used for many applications, including active interrogation and cancer therapy. One critical aspect for active interrogation efficiency is neutron yield, which is more important for successful resolution than the energy spectrum. The typical approach for improving neutron yield entails producing more neutrons, which has motivated multiple studies using the interaction of in...

2010
Sing Lee

Recent extensive and systematic numerical experiments have uncovered new insights into plasma focus fusion devices including the following: (1) a plasma current limitation effect, as device static inductance is reduced towards very small values; (2) scaling laws of neutron yield and soft x-ray yield as functions of storage energies and currents; (3) a global scaling law for neutron yield as a f...

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