液体闪烁计数仪电路板抄板与设计解析

液体闪烁计数仪抄板图

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　　Automatic TDCR liquid scintillation counter
　　With more than 30 years of experience in design and manufacture
　　of liquid scintillation counters Hidex introduces the 300 SL. An
　　Automatic TDCR Liquid Scintillation Counter.
　　The Ingenious design utilizes three photomultiplier tubes aligned
　　at 120 degrees from each other. These three PMT’s enable triple
　　to double coincidence ratio counting or TDCR.
　　TDCR, a technology familiar since 1970’s, has
　　only been employed in research instruments.
　　Hidex is the first manufacturer to introduce a
　　commercial TDCR instrument. The greatest
　　advantage of TDCR is the easy and
　　straightforward method of obtaining counting
　　efficiency of the samples without any
　　external or internal standard source of
　　radioactivity.
　　The 300 SL is a compact instrument with
　　small footprint and can easily be integrated
　　into small laboratories due to its outstanding
　　dimensions of 50 cm width, 60 cm depth and
　　65 cm height. Even with its 4-pi 60mm
　　detector shield the gross weight is just 100 kg.
　　Another unique feature of 300 SL is that the vials
　　are placed on a tray. With matrix format of 8 by 12
　　totals 96 7ml vials in one tray. Alternatively 5 by 8
　　matrix totaling 40 20ml vials can be used. The
　　trays can be used in sample preparation
　　instruments such as liquid handling stations or cell
　　harvesters.
　　300 SL boasts such optional features as alpha/beta
　　separation, cooling of instrument to 15 degrees
　　centigrade, active guard for background reduction
　　or external standard for traditional quench
　　determination.
　　The instrument is operated from PC
　　with MikroWin 2000 lite software. It
　　has easy to use interface, unlimited
　　number of prestored isotopes and
　　protocols and easy interface to Excel
　　or other data reduction programs.
　　MikroWin 2000 can be upgraded to full
　　version with 21 CFR part 11
　　compliency and extensive data
　　reduction features such as quench
　　curve analysis, IC/EC 50 value calculations etc.
　　300 SL automatic TDCR liquid scintillation counter
　　Technical data:
　　Width: 510mm
　　Height: 650mm
　　Depth: 550mm
　　Weight: 95kg
　　Electrical connections: 100-240V 50-60 Hz
　　Ports: RS-232C, USB optional
　　Radiological Data (preliminary):
　　Energy Range β’s: 0 – 2.000 keV
　　Energy Range α’s: 0 – 10.000 keV
　　Efficiency: H-3 unquenched > 65 %
　　H-3 (8 ml water sample, 12 ml Aqualight) > 26 %
　　C-14 unquenched > 95%
　　α’s ( Po-210, U-234/U238, Am-241,Rn-222, Ra-226)>95%
　　Background: H-3: 8 cpm (8 ml water sample, 12 ml Aqualight)
　　α’s ( Po-210, U-234/U238, Am-241,Rn-222, Ra-226)
　　<0.5CPM, in plastic vials

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