P.O. Box 666
Chesterland, OH 44026
Phone: (800) 795-5226
Fax: (440) 729-8238
Radiation Therapy
3-D Water Phantom Dosimetry
ADCL Calibrations
Area Monitors
Barometers-Thermometers-Accessories
Block-Mold Room
CT Electron Density Phantom
Digital Portal Imaging
Electrometers
HDR-LDR Accessories
IMRT QA Equipment
Ion Chambers
Linac Daily Output QA Devices
Patient Dose Verification System
Radiation Survey Meters
Room Lasers
Sensitometers-Desensitometers
TG-51 Water Phantom
Triax Cable Reels
Triax Extension Cables
Water Equivalent Phantoms
Diagnostic Radiology
Calibration Services
Diagnostic Test Tools
Multi Function Meters
Radiation Protection-Monitoring
Test Patterns-Accessories
Test Phantoms
Radiation Safety-Homeland Security
Detectors
Digital Portal Imaging
Gate Monitors
Handheld Survey Meters
Personal Dosimeters
Portal Monitor
Radiation Simulation-Training
Response Kits
Waste Monitors
Nuclear Medicine
Dose Calibrators
Lead Shielding
Thyroid Uptake System
Detectors :
Model 42-30H Neutron Detector
Ludlum Model 42-30H Neutron Detector
The Model 42-30H is a neutron detector designed for detection of thermal and fast neutrons. Typically used with a Model 375 Area Monitor.
The neutron “remball” detector has been the standard for measuring neutron fields for more than 50 years. Recently, the Department of Transportation (DOT) and International Air Transport Association (IATA) regulations have cracked down on the shipping of these detectors due to the poisonous nature of the BF
3
. The Model 42-30H eliminates this problem with the introduction of the
3
He tube.
The differences and similarities between BF
3
and
3
HE tubes are:
Energy Response:
There is no change in energy response which still follows the inverse- RPG curve.
Crosstalk:
Gamma interference or “crosstalk” is the same for both the BF
3
and
3
He tubes. Crosstalk is less than 10 counts per minute at 10R/hr (
137
Cs).
High Voltage:
Operating HV is normally about 1100 Vdc for the
3
He tube, where the BF
3
tube required about 1700 Vdc.
Count Rate:
The
3
He tube has approximately four times the count rate of the BF
3
tube at a given neutron dose rate. This difference is mostly beneficial because it reduces statistical error.
Pressure:
The
3
He tubes have less than 2.7 atmospheres of pressure and are exempt from any shipping requirements.
Click Here to Download a Printable Information Sheet. (.pdf format)
PH 1-800-795-5226
FAX 440-729-8238
P.O. Box 666 Chesterland, OH 44026
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