The 10-channel Low-Level Planchet Counter LB 770 offers simultaneous, separate α-β measurement of 10 planchets, each up to 60 mm Ø. For each sample there are two separate measuring channels for alpha and beta activities.
The 10 planchets, each up to 60 mm Ø, are arranged in a matrix consisting of 5 drawers made of copper with 2 samples each. The 10 ultra-flat flow proportional counter tubes are located directly above the planchets. The 10 measuring counters are covered at the top by a large-area flow counter tube acting as common guard counter.
Slider and counter tubes are surrounded by a 100 mm thick shielding made of machined lead bricks (total weight approx. 950 kg). The 11-fold alpha/beta discriminator unit (preamplifier) is located outside the lead shielding. This unit includes in a common housing the pulse preamplifier discriminators with integral discriminators (alpha and beta channels) for direct connection of measuring counter tubes and a discriminator with integral threshold and pulse shaper module for connection of the guard counter tube. It supplies standard pulses to the interface unit.
Simultaneous, but separate counting of 10 samples offers the following major advantages as compared with single detector automatic sample changers:
Low background system ideally suited for the measurement of alpha / beta emitting nuclides commonly used in these application areas:
Beta emitters like C-14, P32, P-33, Co-60, Sr-90, Tc-99, Cs-137.Alpha emitters like Ra-226, Po-210, Th232 are measured with very good efficiency.
BERTHOLD TECHNOLOGIESGmbH & Co. KG
Calmbacher Str. 2275323 Bad WildbadGermany
+49 7081 177-0+49 7081 177-100info@Berthold.com