|
Curopium-doped Calcium
Fluoride Crystal, CaF2:Eu has low density, and low back
scattering to charged particles and rays. So it is usually used for
detecting β rays and
low-energy γ rays. And it can also be used as optical switch together
with NaI(Tl) crystal.
Red Optronics can supply BGO up to
φ200×100mm (cylinder).
|
Scintillation
Properties
|
|
|
Space
group
|
Fm3m
|
|
Cleavage
plane
|
(111)
|
|
Density
(g.cm-3)
|
3.18
|
|
Melting
point (°C)
|
1360
|
|
Hardness
(Mhos)
|
4
|
|
Hygroscopic
|
No
|
|
Radiation
Length (cm)
|
3.05
|
|
Peak
emission (nm)
|
435
|
|
Decay
constant (ns)
|
940
|
|
Refractive
index at emission maximum
|
1.44
|
|
Lower
wavelength cutoff (nm)
|
395
|
|
Thermal
expansion coefficient (×10-6 K-1)
|
19.5
|
|
Afterglow
(after 3ms) (%)
|
<
0.3
|
|
Light
output relative to Nal(Tl) (%)
|
50
|
|
|
