Table 1.

Some figures of merit of the Cerenkov emission in water and soft tissue

	Water	Tissue
n, average in (400–1000) nm	1.33	1.4
θ max(β→1)	41°	44°
T min(θ=0), β particle	264 keV	219 keV
$\frac{\mathit{\text{dN}}}{\mathit{\text{dl}}}(400-1000\text{nm}),\beta \to 1$	20 ph/mm	23 ph/mm