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RISS 인기검색어
- 검색키워드
- 저자 : P. Siegler (검색결과 2 건)
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Transmission and Capture Measurements for ^(241)Am at GELINA
C. Lampoudis,S. Kopecky,A. Plompen,P. Schillebeeckx,P. Siegler 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
The precise knowledge of cross sections for neutron induced reactions of major and minor actinides is essential for the design of advanced reactors. Furthermore, the present evaluated data files disagree with the results of some recent measurements. Therefore it was decided to perform new transmission and capture measurements for ^(241)Am at GELINA aiming to improve the evaluations. For the measurements a novel sample preparation method has been employed, for ensuring the homogeneity of the samples. The first results of capture and transmission measurements are consistent with each other, and with recent experimental values, but seem to be inconsistent with the evaluated data files. Before the final results can be reported, a careful characterisation of the americium sample is required.
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A Transparent Detector for n_TOF Neutron Beam Monitoring
S. Andriamonje,M. Calviani,Y. Kadi,R. Losito,V. Vlachoudis,E. Berthoumieux,F. Gunsing,A. Giganon,Y. Giomataris,C. Guerrero,R. Sarmento,P. Schillebeeckx,P. Siegler 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
In order to obtain high precision cross-section measurements using the time-of-flight technique, it is important to know with good accuracy the neutron uence at the measuring station. The detector dedicated to these measurements should be placed upstream of the detectors used for capture and fission cross-section measurements. The main requirement is to reduce the material of the detector as much as possible, in order to minimize the perturbation of the neutron beam and, especially, the background produced by the device itself. According to these considerations, a new neutron detector equipped with a small-mass device based on MicroMegas "Micro-bulk" technology has been developed as a monitoring detector for the CERN n TOF neutron beam. A description of the different characteristics of this innovative concept of transparent detector for neutron beam monitoring is presented. The result obtained in the commissioning of the new spallation targetof the n TOF facility at CERN is shown, compared with simulations performed with the FLUKA code.
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