Radiation-hard
scintillators are used in places were considerable dose impact is achieved (nuclear power
plants, radiation facilities etc.) or operation conditions make it impossible to change
sensor elements frequently (space flight objects, large detectors for high energy
physics). Fore these purposes we have developed the new radiation-hard scintillator
UPS99RH.
The main characteristics of radiation hardness, namely technical
attenuation length (TAL) is presented in fig 1 for our new scintillator as well as for
some nearest "competitors" The dependence of TAL after 10 MRad irradiation on
dose rate is presented in fig. 1.

More detailed information on scintillator parameters could be found in
table 1.
Table 1.
| Name |
Light yield, ph.e. |
BAL length (before irradiation), cm |
TAL (before irradiation), cm |
TAL after 10 MRad dose irradiation |
| UPS99RH |
3.0 |
70 |
70 |
20 |
| BC408 |
3.8 |
370 |
170 |
12 |
| SCSN-81 |
2.8 |
100 |
70 |
9 |
| UPS923A (standard) |
3.5 |
270 |
140 |
8 |
|
Our new developments in the field of general-purpose
scintillators are represented by standard scintillator UPS97GS. These scintillators are
made by means of glass mold casting technique. Their main characteristics are summarized
in the table 2.
Table 2.
| Name |
BAL, cm |
TAL for 4mm plate, cm |
Operation time, years |
Light yield, % anthracene |
| UPS97GS |
270 |
100 |
9.8 |
50 |
| BC408 |
370 |
170 |
5.0 |
55-60 |
| SCSN-81 |
100 |
80 |
8.4 |
45 |
According to the whole set of indexes (operation
time, light yield, transparency) our UPS97GS exceed its analogs (BC408 and SCSN-81).
Besides, we can produce these devices with literally unlimited sizes. |