نتایج جستجو برای: neutron moderation

تعداد نتایج: 51301  

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...

2015
Janice Langan-Fox James M. Canty Michael J. Sankey

The current study presents a conceptual framework for the moderation of the relationship between implicit and self-attributed motive congruency and psychological well-being. Consistent with this framework, we found evidence for such moderation effects for predicting life satisfaction in a secondary data analysis of a sample (N = 441) drawn from the Eugene-Springfield Community Sample longitudin...

2005
Paula M. Pickering

In this paper, I explore conditions that contribute to a rare outcome in ethnic party systems: the election of parties with moderate positions on interethnic relations. More specifically, I investigate why voters of the small, impoverished, and ethnically fragmented states of Bosnia and Macedonia, which share the same electoral system, chose parties with divergent positions on interethnic relat...

صالحی, روح اله, طاهری, محمد, عبداله زاده, مسعود, قاسمی, عباس,

  Background : Performing successful BNCT experiments needs a suitable neutron source. Important factors of the neutron beam are flux and energy that are very important in the selection of neutron source. In most centers that use this method for treatment, reactor is a neutron source, which according to characteristics of the reactor appropriated neutrons are very high. High cost of constructin...

Journal: :medical journal of islamic republic of iran 0
m. ayubian iran university of medical sciences.سازمان اصلی تایید شده: دانشگاه علوم پزشکی ایران (iran university of medical sciences) k. kamali moghadam atomic energy organizationسازمان اصلی تایید شده: سازمان انرژی اتمی (atomic energy organization) t. taheri atomic energy organizationسازمان اصلی تایید شده: سازمان انرژی اتمی (atomic energy organization)

abstract background: with respect to the difference in the interaction of thermal neutron and x rays with matter, using two radiography systems of thermal neutron and x rays will yield highly valuable information for studying the inner structure of biologic samples. methods: the high sensitivity of thermal neutron to hydrogen, in particular, has led to recognizing this system as a useful tool i...

2005
Abdul-Majeed Azad

Liquid metals such as Bi and Pb and Pb–Bi eutectic alloy are serious contenders for use as coolant in LMFBRs in lieu of sodium due to a number of attractive characteristics (high density, low moderation, low neutron absorption and activation, high boiling point and poor interaction with water and air, etc.). Analysis of hypothetical accidents is of relevance to predict the catastrophe involving...

2001
O. P. Joneja R. Chawla

Studies of spectral characteristics of different critical and driven sub-critical MUSE-4 configurations are presented in this paper. The current investigations have permitted to quantify important aspects, such as the influence of the intrinsic source, the asymmetry of the core along the north/south axis, the impact of the two different types of external sources to be employed, and the moderati...

Journal: :Nuclear Science and Techniques 2021

Back-streaming neutrons from the spallation target of China Spallation Neutron Source (CSNS) that emit through incoming proton channel were exploited to build a white neutron beam facility (the so-called Back-n source), which was completed in March 2018. The is very intense, at approximately 2 × 107 n/cm2/s 55 m target, and has nominal with power 100 kW CSNS-I phase kinetic energy 1.6 GeV thick...

Journal: :Computational Statistics & Data Analysis 2016
Michael P. Clements

We show that factor forecasting models deliver real-time gains over autoregressive models for US real activity variables during the recent period, but are less successful for nominal variables. The gains are largely due to the Financial Crisis period, and are primarily at the shortest (one quarter ahead) horizon. Excluding the preGreat Moderation years from the factor forecasting model estimati...

2017

Resum Moderation in virtual communities should not be a private privilege. This paper proposes a method for participants in a social network to decide their own rules for accepting (or not) contents. With the norm argument map, participants are able to argue about norms and voice their opinions about other people?s arguments. This structure, equipped with a method to fuse all the data introduce...

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