Silicon Charged Particle Detectors

Silicon Detectors for Alpha Spectroscopy

Ultra-CAM

The most common areas of application of Alpha Spectroscopy are in radiochemistry and the screening of health physics and environmental samples.

The silicon detectors of choice for these applications are ULTRAs with a depletion depth of >/=100 microns and ULTRA-AS detectors for ultra-low background applications.

Many installations still use reliable Ruggedized (R-Series) Surface Barrier Detectors, which are both low-background and light tight.

ULTRA and ULTRA AS Ion Implanted Silicon Charged Particle Detector Data Sheet

ULTRA-CAM Ion Implanted Silicon Detector for Continuous Air Monitoring Data Sheet

R Series Ruggedized Partially Depleted Silicon and Low Background (See No Alpha) Detector Data Sheet

Alpha Spectrometers

Whether you need just one spectrometer or many, ORTEC has choices to suit your needs.

OCTETE PLUS Alpha Spectroscopy Workstation Fast (8 μs) ADC and memory on a PCI-Bus plug-in card Computer control of all MCA functions MAESTRO-32 MCA Software included 8 spectrometers and 8 additional inputs for external spectrometers. Download the OCTETE PLUS data sheet.

576A Dual Alpha Spectrometer Two independent alpha-spectroscopy channels Each channel includes vacuum chamber, sample holder, detector, bias supply, preamplifier, amplifier, biased amplifier, test pulser, and discriminator Separate energy range selections for each channel: 3-5, 4-6, or 5-7 MeV and 3-7, 4-8, or 5-9 MeV Choice of either vertical or horizontal sample holder Available with ULTRA™ or Ruggedized® detector with area of 300 mm2, 450 mm2, or 600 mm2 Precalibrated at the factory, the 576A requires no further adjustments AlphaVision-32 (A36-B32) is recommended as companion alpha analytical software Download the 576A data sheet.

SOLOIST Alpha Spectrometer A versatile, integrated, alpha spectrometer for measuring low-activity samples that decay by alpha-particle emission Includes sample chamber, detector, bias supply, preamplifier, amplifiers, and calibration pulser in a NIM-standard double-width module Accommodates horizontal samples up to 5.1 cm (2 in.) in diameter with adjustable sample-to-detector spacing Available with low-background ULTRA-AS™ Series detectors up to 1200 mm2 in active area Easy access to vacuum chamber through hinged door featuring a high-reliability, O-ring seal Removable, nickel-plated brass chamber simplifies decontamination Calibrated outputs and controls for selected energy ranges Complete, turn-key multiple-unit alpha spectrometer systems available Download the SOLOIST data sheet.

A-576 A-PAD Preamplifier, Amplifier, Discriminator with Bias Supply Complete alpha spectroscopy chain in a one-wide NIM module Includes preamplifier, amplifier, bias supply, and discriminator Lowest cost per input for non-NIM vacuum chambers Spectroscopy and gross counting outputs Front-panel-selectable energy ranges Integral test pulse generator Download the A-576 A-PAD data sheet.

Accessories for Alpha Spectrometers
807 Vacuum Chamber For routine alpha/beta counting Convenient and durable Sample-to-detector distance easily set and measured Can be used for beta-gamma coincidence measurements Single valve for pumping and venting Download the 807 Vacuum Chamber Data Sheet

808 Vacuum Chamber For quick and convenient measurement of environmental samples with charged-particle detectors Superior design and construction Accommodates extra large samples Easily adjustable and repeatable sample-detector geometry Low-background sample holders Compatible with any ORTEC charged-particle detector equipped with a Microdot^®connector Front-opening hinged door Three-way, high-quality, "Pump", "Hold", and "Vent" vacuum valve Compatible with the ORTEC ALPHA-PPS-115 (or -230) Portable Pumping Station Download the 808 Vacuum Chamber Data Sheet

Am-1 Ultra-Thin Window Alpha Source CALIBRATED ²⁴¹Am SOURCE ― ORTEC Am-1C Isotopically pure ²⁴¹Am of 0.1-µCi nominal activity is electrodeposited on platinum and is calibrated to within 1% of the absolute disintegration rate. The energy spectrum from ²⁴¹Am contains alphas of 5.486 MeV (85%), 5.443 MeV (12.8%), and others <2% each. UNCALIBRATED ²⁴¹Am SOURCE ― ORTEC Am-1U This source is identical to the one described above, except that it has not been calibrated. Download the Am-1 Ultra Thin Window Alpha Source Data Sheet

Portable Pump Station User selectable for fast/slow pumping Three gas ballasting modes Oil anti-suckback valve Capacity to pump down two cabinets of spectrometers Antibackstreaming oil trap New exhaust mist eliminator Vacuum gauge and thermocouple No assembly required High performance at an economical price Pumping station for all ORTEC alpha spectrometers Adaptable to other manufacturer's alpha modules Interfaces with multiport manifolds Adaptable to 807 or 808 Vacuum Chambers Pump selectable for 115 and 230 volts Cart-mounted, for flexibility Fold-down handle for convenient storage Download the Portable Pump Station Data Sheet

576-VM Vacuum Manifold and Control For convenient use of up to four Model 576(A) Dual Alpha Spectrometers with a single pump Screw-type vacuum valves for fine adjustment of pumping speed Download the 576VM Vacuum Manifold and Control Data Sheet

RCAP-2 Ion Recoil Contamination Avoidance Package (for Alpha Spectrometers) Battery-biased sample holder Electronically-controlled pressure regulator Reliable and easy to operate Download the RCAP-2 Ion Recoil Contamination Avoidance Package Data Sheet