Iridium has been used for decades at Los Alamos as a fluence monitor in underground nuclear testing. Iridium can be used to monitor three neutron spectral groups at once, thermal/epithermal, 14 MeV, and fission spectrum (&gt;2 MeV). The nuclear reaction Ir-193(n,n')Ir-193m has not had a model independent cross section, until recently. The first measurement of the cross section was made last fall at the Berkeley HFNG.

Iridium: Important neutron flux monitor

2019 Fall National Meeting

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