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AbstractAbstract
[en] Monte Carlo calculations are described which confirm that the response of a spherical thermal-neutron detector at the centre of a spherical moderating assembly in a neutron beam diverging from a point source is simply related to its response in a parallel neutron beam. (orig.)
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Journal Article
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Nuclear Instruments and Methods; ISSN 0029-554X;
; v. 184(2/3); p. 595-597

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AbstractAbstract
[en] In neutron spectrometry and dosimetry where Bonner spheres are used, certain questions arise, such as: which of these spheres should be employed in a particular neutron field or energy region, and in a given measuring time, to obtain the neutron spectrum, fluence, or dose equivalent with a minimum uncertainty? These and similar questions in spectrometer optimisation can be answered by means of a general measure of the quality of an experiment, established from basic requirements. The most suitable measure turns out to be the trace of the squared, reduced covariance matrix of the measurands of the experiment, whereby this matrix expresses the individual and mutual uncertainties of the measurement results. (author)
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Smith, C.O.
Proceedings of the first international conference on structural mechanics in reactor technology1972
Proceedings of the first international conference on structural mechanics in reactor technology1972
AbstractAbstract
No abstract available
Primary Subject
Source
Jaeger, T.A. (comp.); Commission of the European Communities, Brussels (Belgium); Bundesanstalt fuer Materialpruefung, Berlin (F.R. Germany); v. 2 (pt.C) p. 223-244; 1972; First international conference on structural mechanics in reactor technology; Berlin, F.R. Germany; 20 Sep 1971; 11 figs.
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Report
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AbstractAbstract
[en] To reduce the error of measurement that the sphere-sphere disturbance caused when the on-line Bonner sphere spectrometers use many slow-sphere in the measurement, this thesis uses MCNP to simulate the impact on sphere-sphere disturbance of three factors of disturb-sphere radius, detect-sphere radius, distance of sphere-sphere, and make a synthesis of simulation and actual measurement results and design a plan of placing slow-sphere. The results show that this plan can reduce the sphere-sphere disturbance to an acceptable level and also can provide the design of on-line Bonner sphere spectrometers with theoretical support and data reference. (authors)
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Source
8 figs., 3 tabs., 7 refs.
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Journal Article
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Nuclear Electronics and Detection Technology; ISSN 0258-0934;
; v. 35(12); p. 1216-1220

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AbstractAbstract
[en] This paper compares the use of both standard unfolding and Bayesian methods to analyze data extracted from neutron spectrometric measurements with a view to deriving some integral quantities characterizing a neutron field. We consider, as an example, the determination of the total neutron fluence and dose in the vicinity of an Am–Be source from Bonner spheres measurements. It is shown that the Bayesian analysis provides a rigorous estimation of these quantities and their correlated uncertainties and overcomes difficulties encountered in the standard unfolding methods.
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Source
S0168-9002(12)00652-3; Available from http://dx.doi.org/10.1016/j.nima.2012.06.016; Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment; ISSN 0168-9002;
; CODEN NIMAER; v. 689(Complete); p. 35-39

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AbstractAbstract
[en] Collision probabilities in spherical geometry are decomposed into a sum of Meijer's G functions, which are subsequently identified as the product of an exponential and a polynomial of finite degree and are hence easily computed. The series is then summed analytically, and the usual transport kernel for spherical geometry--the exponential integral--appears. A new form of the integral transport equation for the scalar flux is thus found
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Journal Article
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Nuclear Science and Engineering; v. 67(3); p. 339-340
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AbstractAbstract
[en] For plurisubharmonic functions Cn of lower order λ<+∞ estimates of the growth of their maximum value on the sphere of radius r with centre at the origin in terms of the growth of the Nevanlinna characteristics T(r,u) are obtained. These estimates are best possible for λ≤1. The results are new even in the case of functions of the form u= log |f|, where f is an entire function in Cn, n>1
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Available from http://dx.doi.org/10.1070/SM1999v190n02ABEH000387; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Sbornik. Mathematics; ISSN 1064-5616;
; v. 190(2); p. 309-321

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AbstractAbstract
[en] Using the free volume of van der Waals equation, Carnahan-Starling equation for hard spheres, Wilson equation for nonrandom mixing of solution, NRTL equation and our equation, several new equations of states for pure gases are derived. Using these equations, compressibility factors for pure gases are calculated and compared with Nelson-Obert generalized compressibility factor charts. The equation of states using the concept of molecular nonrandom distribution gave better results than those of molecular random distribution. This shows that the molecular nonrandom distribution makes considerable effect on the equation of states
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12 refs, 8 figs, 1 tab
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Journal Article
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Journal of the Korean Chemical Society; ISSN 1017-2548;
; v. 57(5); p. 540-546

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Hu, Zejun; Zhai, Shujie, E-mail: huzj@zzu.edu.cn, E-mail: zhaishujie@zzu.edu.cn2018
AbstractAbstract
[en] In this paper, we establish a complete classification of umbilic-free submanifolds of the unit sphere with parallel Möbius second fundamental form and arbitrary codimension.
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Copyright (c) 2018 Springer Nature Switzerland AG; Article Copyright (c) 2018 Springer International Publishing AG, part of Springer Nature; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Results in Mathematics; ISSN 1422-6383;
; v. 73(3); p. 1-46

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Liu, Wen-Chun; Hwang, Jisoo; Koo, Annette; Wu, Houping; Leecharoen, Rojana; Yu, Hsueh-Ling, E-mail: liuwenchun@itri.org.tw2018
AbstractAbstract
[en] Five NMIs within APMP, including CMS/ITRI, MSL, NIM, NIMT and KRISS from TCPR applied to the APMP technical committee initiative project for funding to carry out a pilot comparison of transmittance haze in 2012. The project started in 2014 and the final report was completed at the end of 2016. In this pilot comparison, three different haze standards were adopted, and transmittance haze for each standard was measured according to ASTM D1003 or ISO 14782. This paper presents the first results of an APMP pilot study of transmittance haze and the analysis of the variation among different haze measurement systems which are commonly used. The study shows that the variables such as sphere multiplier, transmittance distribution, fluorescence of samples and optical path of the incident beam cause discrepancies among NMIs and highlight deficiencies in current documentary standards. (paper)
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13. International Conference on New Developments and Applications in Optical Radiometry; Tokyo (Japan); 13-16 Jun 2017; Available from http://dx.doi.org/10.1088/1742-6596/972/1/012023; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
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Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 972(1); [6 p.]

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