Indeed, at high neutron energies ([E.sub.n] [greater than or equal to] 100 keV) the second term in the brackets for the neutron flux density (18), which is included in the expression (20), will be significantly larger than the first and therefore the energy spectrum of moderated neutrons in this part of the energies is the same as the fission neutron
spectrum (maximum is in the high part of the spectrum).
Results were obtained also for a fission neutron
spectrum having a Watt shape.
Using the innovative approach of time-modulated fission neutron
detection, this system combines a large detection area with directional information to achieve sensitivity to signals much weaker than the natural neutron background.
- The assays demonstrate that over these mineralised intervals both the Prompt Fission Neutron
(PFN) and gamma values report significantly lower pU3O8.
He said he has asked for a workshop to he held in the Spring of 2004 to look specifically at whether it is possible to develop a model based on fission neutron
irradiation and Spallation Neutron Source irradiation, coupled with the capabilities Ultrascale computing.
Additional Prompt Fission Neutron
("PFN") data obtained from the current drilling program is adding to Toro's confidence in applying a "correction factor" of approximately 1.34 (34%) to existing gamma-radiation data.
The average energy of [sup.252]Cf source spontaneous fission neutron
is 2.13 MeV.
Peak results from use of the Prompt Fission Neutron
Tool (PFN) downhole logging tool report over 0.6% pU3O8, with consistent widths and grades using a 200 parts per million (ppm) pU3O8 cut off.
The SUSD3D analysis revealed several differences between the results based on different prompt fission neutron
spectra (PFNS) covariances, in some cases resulting in rather large (unphysical) uncertainties.
All holes will be logged using a prompt fission neutron
("PFN") tool that will allow Toro to directly measure and report the grade of uranium mineralisation.
Following the highly successful Theseus 2011 drilling program, Toro has estimated the project's ETR by using a compilation of individual drillhole downhole gamma, prompt fission neutron
(PFN) and assay results.