The importance of excitation functions in fast neutron flux measurement

1971 ◽  
Vol 95 (2) ◽  
pp. 394
Author(s):  
D Crumpton ◽  
P.E. Francois ◽  
S.E. Hunt
Keyword(s):  
Neutron Flux ◽  
Fast Neutron ◽  
Flux Measurement ◽  
Fast Neutron Flux ◽  
Excitation Functions

The excitation functions of some (np) reactions

1949 ◽  
Vol 45 (1) ◽  
pp. 141-144 ◽  
Author(s):  
E. Bretscher ◽  
D. H. Wilkinson
Keyword(s):  
Neutron Flux ◽  
Fast Neutron ◽  
Neutron Spectrum ◽  
Incident Neutron ◽  
Neutron Spectroscopy ◽  
Fast Neutron Flux ◽  
Excitation Functions ◽  
Image Position ◽  
No Activation ◽  
Shape And Size

Investigations of reactions of the typeare of interest for their own sake, and also for the fact that, if is a radioactive nucleus, as it usually is, being a stable isobar, activation of a few different A nuclei in the same fast neutron flux will yield some information about the neutron spectrum. This follows from the fact that these (np) reactions (and the similar (nα) reactions) are nearly all endothermic, showing a threshold of neutron energy below which no activation takes place. Thus knowledge of the excitation functions of a few such reactions would enable the above-mentioned crude neutron spectroscopy to be realized. The detectors (A nuclei) would have a standard shape and size, and the induced β-activity would be measured with a standard counter in fixed geometrical conditions. Though exact spectroscopy would not be possible, any change in the relative activations of the detectors would be a quite sensitive indicator of a change in the incident neutron spectrum.

Fast Neutron Flux Measurement Using Gas-Flow Techniques

1974 ◽  
Vol 23 (1) ◽  
pp. 87-93
Author(s):  
D. P. Brown ◽  
W. G. Spear
Keyword(s):  
Neutron Flux ◽  
Fast Neutron ◽  
Gas Flow ◽  
Flux Measurement ◽  
Fast Neutron Flux ◽  
Flow Techniques
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