Quantity	Energy	Unit	Min.	Max.
neutron dose rate	E>0.5 eV	mGy/s	0.023	14
γ dose rate	-	μ Gy/s	1.5	2570
Flux	E>0.5 eV	cm-2s-1	2*106	2*109
Thermal flux	E<0.5 eV	cm-2s-1	5*104	3*108
Intermediate flux	0.5 eV <E<100 keV	cm-2s-1 per unit lethargy	8*103	2*106

Fig. 5. Typical neutron spectra in the irradiation cavity. The beam-coupling window is Be, the internal filter is Bi, 100 mm thick. Lower curve: no external filter. On the middle: 200 mm polyethylene and 45 mm Pb external filters. Upper curve: 45 mm Pb + 30 mm Fe external filters. The spectra are normalized to 1 and shifted by the factors indicated to avoid overlapping.