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Spectrométrie Alpha

Quantification and identification of alpha-emitting nuclides plays a key role in site environmental characterization and radiation protection.  Alpha spectroscopy is especially crucial for waste management and site decommissioning and decontamination applications. CANBERRA offers turnkey solutions for alpha spectroscopy in both production “batch mode” or research environments.

Alpha Spectroscopy

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Alpha Analyst Integrated Alpha Spectrometer

Alpha Analyst Integrated Alpha Spectrometer


CANBERRA's Alpha Analyst™ along with Apex-Alpha™ software is the complete solution for both routine and non-routine alpha spectroscopy applications. This flexible Alpha Spectroscopy System is designed to operate the way you do – whether that's counting samples in a production "batch mode" environment or one sample at a time in a research type environment.


  • Completely integrated alpha spectroscopy instrument
  • 100% computer controlled electronics and vacuum
  • Automatic recoil suppression control
  • Modular for ease of expansion
  • Straightforward sample oriented graphical user interface
  • Clean vent port to reduce moisture and contamination buildup in chambers
  • Extensive QA record keeping built in
  • Connects directly to Ethernet network
  • Optional calibration services and startup

Alpha Analyst Integrated Alpha Spectrometer

Alpha Spectroscopy Accessories

Alpha Spectroscopy Accessories

Model 7400-01/7400-02 Vacuum Pump

  • 25 liter per minute pumping speed
  • Pressure to 13.3 10-3 Pa (1 10-4 mmHg)
  • Model 7400-01 (120 V, 60 Hz)
  • Model 7400-02 (230 V, 50 Hz)
  • Shipping weight: 18 kg (40 lb)

Model 7400-09 Inlet Filter

  • Prevents oil back-streaming
  • Aluminum construction
  • 12.7 mm (0.5 in.) diameter inlet
  • 19.0 mm (0.75 in.) diameter outlet
  • Replaceable filter element
  • Shipping weight: 0.45 kg (1 lb)
  • Model 7400-10 replacement cartridge (5-pack)

Model 7400-11 Installation Kit

  • Includes 2.4 m (8 ft) vacuum line, clamps and fittings to connect spectrometer to vacuum pump, with or without optional filter or manifold.
  • Shipping weight: 2.3 kg (5 lb)

Model 7400-03/7400-04 Direct Drive Vacuum Pump

  • 43 liter per minute pumping speed
  • Pressure to 4 10-1 Pa (3 10-3 mmHg)
  • Model 7400-03 (120 V ± 10%, 50/60 Hz)
  • Model 7400-04 (230 V ± 10%, 50/60 Hz)
  • Shipping weight: 14 kg (30 lb)

Model 7400-17 Exhaust Filter Kit

  • Exhaust filter assembly for above listed vacuum pumps. Fits 3/4-20 exhaust port.
  • Removes fine oil droplets from pump exhaust allowing pump to discharge into clean work area.
  • Model 7400-18 replacement filter
  • Shipping weight: 0.45 kg (1 lb)

Model 7400-13 Six Port Manifold

  • Includes all necessary flexible vacuum lines, clamp, fittings, and so forth, to connect 1-6 spectrometers.
  • Requires one 7400-11 Installation Kit
  • Shipping weight: 0.9 kg (2 lb)

Model 7400-14 Dual Six-Port Valved Manifold

  • Connects 1-6 spectrometers to roughing and high vacuum pumps.
  • Allows independent operation of multiple spectrometers.
  • 17.8 48.3 cm (7 19 in.) rack mount panel
  • Requires two 7400-11 Installation kits
  • Shipping weight: 5.4 kg (12 lb)

Model 7400-14A Valved Manifold with Pressure Control

  • Same as Model 7400-14, but has a front panel adjustable bleed valve for pressure control.
  • Pressure Range 0.13-1.33 kPa (1-10 mmHg)
  • Shipping weight: 6.8 kg (15 lb)

Model 7400-16 Pressure Gauge Panel

  • Pressure Range 0-20 mm Hg (0-2.66 kPa)
  • Thermocouple pressure gauge tube and installation hardware included.
  • Choice of 120 V or 230 V, 50/60 Hz operation. Specify at time of order.
  • Shipping weight: 2.3 kg (5 lb)

Model 7400-16A Dual Pressure Gauge Panel

  • Pressure Range 0-20 mmHg (0-2.66 kPa)
  • Thermocouple pressure gauge tube and installation hardware included.
  • Choice of 120 V or 230 V 50/60 Hz operation. Specify at time of order.
  • Shipping weight: 2.7 kg (6 lb)
Alpha Spectrometer - Model 7401

Alpha Spectrometer - Model 7401


The CANBERRA Model 7401 is a comprehensive alpha spectrometer that can accommodate samples up to two inches in diameter in a double- width NIM package. The versatile sample chamber and instrument electronics support CANBERRA's own PIPS Detectors, which combine high resolution and low backgrounds in a rugged alpha detector with active areas up to 1200 mm 2 . In addition, the alternative use of most charged particle detectors is also supported. The Model 7401 fully integrates into one package a stainless steel vacuum chamber for low backgrounds and ease of cleaning, a vacuum gauge, detector bias supply, preamp/amplifier, pulser, discriminator, counter, and digital display. A stainless steel shelf and sample holder are included with each spectrometer, for reproducible detector/sample spacing, which is user selectable from 1 to 49 mm, in 4 mm increments.

The full functionality of the 7401 is enhanced by a microprocessor- managed user interface. Front panel controls allow the user to quickly set and easily display the bias voltage on the detector, the energy value of the calibrated internal pulser, the energy value of the discriminator and the preset time for the built-in counter. Additionally, the front panel display also monitors chamber pressure, detector leakage current, accumulated counts and elapsed time. To facilitate routine work and quick setup, the detector bias voltage, discriminator energy and pulser settings are retained in memory when the 7401 is switched off. For gross alpha counting, the counter can be started, stopped and reset using the simple front panel switches. For added convenience, the time display can be internally configured for either seconds or hours.

To support a variety of alpha detectors, the built-in detector bias supply is adjustable from 2 to 198 V dc, positive or negative. Premature and possibly damaging application of bias to the detector is avoided by a user-configured interlock. The interlock safely inhibits the bias supply until proper vacuum is attained, then the bias voltage is gradually ramped to the predetermined setting, over approximately one minute.

The precision preamp and amplifier provide the optimal pulse shaping and signal conditioning required for detectors used in alpha spectrometry. Gain and offset of the amplifier can be adjusted by means of front panel access to multi-turn controls. For reference, the internal test pulser can be set to mark energies from 0.1 to 10 MeV and can be used to calibrate the spectrometry system without the use of alpha emitting sources. The counter discriminator also is calibrated in energy units and is fully variable between 0.1 and 10 MeV. The discriminator output, indicating activity above the selected setting, is available at the rear panel counts output. The rear panel also has a connector for signal input from an optional external test pulser. When combined with appropriate CANBERRA Mixer/Routers, Multiplexers and software products, a single multichannel analyzer (MCA) can easily support multiple 7401 Alpha Spectrometers in a complete data acquisition and analysis system.

Alpha Spectrometer - Model 7401


  • Stainless steel vacuum chamber
  • Accommodates samples up to 50 mm (2 in.) diameter
  • Supports the use of alpha detectors up to 1200 mm 2
  • Optional reverse sample bias (standard with 7401VR)
  • Built-in counter/timer
  • Integral vacuum gauge with vacuum/bias interlock
  • Bias supply variable to 198 V dc, positive or negative
  • Digital display of:
    • Counter/Timer
    • Chamber Pressure
    • Detector Bias
    • Leakage Current
    • Pulser Energy
    • Discriminator Energy
Apex-Alpha™ - Alpha Spectroscopy Software Suite

Apex-Alpha™ - Alpha Spectroscopy Software Suite

Apex-Alpha™ - Alpha Spectroscopy Software SuiteApex-Alpha is part of our Apex Software Family.

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