New capability for neutron transmission measurements at LANSCE: The DICER instrument

Author(s):  
A. Stamatopoulos ◽  
P. Koehler ◽  
A. Couture ◽  
B. DiGiovine ◽  
G. Rusev ◽  
...  
2001 ◽  
Vol 34 (3) ◽  
pp. 258-262 ◽  
Author(s):  
D. F. R Mildner ◽  
M. Arif ◽  
S. A. Werner

Thermal neutron transmission measurements have been made as a function of wavelength on a pyrolytic graphite monochromator crystal that has been set to diffract a horizontal beam at different take-off angles. The major dips in the transmission caused by the various reflections have been identified. These results can be used for the design of a beamline on which more than one instrument is placed. The transmission data show that it is best for the monochromator with the greatest (horizontal) take-off angle to be placed upstream, with monochromators with decreasing take-off angles progressively further downstream. The order of instruments for which the wavelength is greater than 0.43 nm is unimportant.


1988 ◽  
Vol 23 (12) ◽  
pp. 4231-4236 ◽  
Author(s):  
M. Adib ◽  
A. Abdel-Kawy ◽  
Y. Abbas ◽  
A. Ashry ◽  
M. Wahba

1991 ◽  
Author(s):  
G. de Saussure ◽  
N. M. Larson ◽  
J. A Harvey ◽  
N. W. Hill

2020 ◽  
Vol 239 ◽  
pp. 01006
Author(s):  
Arnd Junghans ◽  
Roland Beyer ◽  
Jürgen ClauBner ◽  
K Toniögler ◽  
Sebastian Urlass ◽  
...  

Neutron total cross sections are an important source of experimental data in the evaluation of neutron-induced cross sections. The sum of all neutron-induced reaction cross sections can be determined with a precision of a few per cent in a relative measurement. The neutron spectrum of the photoneutron source nELBE extends in the fast region from about 100 keV to 10 MeV and has favourable conditions for transmission measurements due to the low instantaneous flux of neutrons and low gamma-flash background. Several materials of interest (in part included in the CIELO evaluation or on the HPRL of OECD/NEA) have been investigated: 197Au [1, 2], natFe [2], natW [2], 238U, natPt, 4He, natO, natNe, natXe. For gaseous targets high pressure gas cells with flat end-caps have been built that hold up to 200 bar pressure. The experimental setup will be presented including results from several transmission experiments and the data analysis leading to the total cross sections will be discussed.


1992 ◽  
Vol 19 (7) ◽  
pp. 393-402 ◽  
Author(s):  
G. de Saussure ◽  
N.M. Larson ◽  
J.A. Harvey ◽  
N.W. Hill

2007 ◽  
Author(s):  
Giuseppe Viesti ◽  
S. Pesente ◽  
G. Nebbia ◽  
D. Fabris ◽  
M. Lunardon ◽  
...  

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