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Low-Background Alpha/Beta Counting System

The HA4100 is an integrated, cabinet-style low-background counting system utilizing dual-scintillator detectors. Available in 1, 2, 4, 6, 8, and 10-channel configurations, each detection channel operates independently while allowing simultaneous measurement. It is designed for total alpha and beta activity concentration analysis in water, biological, environmental, and aerosol samples.
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Product Overview

The HA4100 is an integrated, cabinet-style low-background counting system utilizing dual-scintillator detectors. Available in 1, 2, 4, 6, 8, and 10-channel configurations, each detection channel operates independently while allowing simultaneous measurement. It is designed for total alpha and beta activity concentration analysis in water, biological, environmental, and aerosol samples.

 

Features

  • Low Maintenance:​ Dual-scintillator detectors are resistant to surface contamination and require no consumables, ensuring a long service life.
  • Superior Anti-coincidence:​ Anti-coincidence shielding efficiency > 99.9%, drastically reducing background counts.
  • Precision Control:​ High voltage and discriminator thresholds are software-programmable, ensuring high setting accuracy.
  • Automated Decay Correction:​ Automatically corrects activity for working and certified reference sources based on half-life.
  • High Mobility:​ Robust cabinet design with integrated casters for easy relocation and space-saving storage.
  • Auto-Calculation:​ Automatically computes mean values, activity concentration, standard error, and MDA (Minimum Detectable Activity).
  • Secure Data Archiving:​ Automatically saves results with support for data retrieval and export.
  • On-Site Reporting:​ Equipped with a tablet PC and dot-matrix printer for real-time hardcopy output.
  • User-Friendly Interface:​ Native Chinese software interface for rapid parameter setup and real-time result display.

 

Technical Specifications

Product Model

HA4100

Alpha Background

≤ 0.0032 cm⁻²·min⁻¹

(Condition: ²³⁹Pu source, active area Φ25 mm, 2π efficiency ≥ 80%)

Beta Background

≤ 0.10 cm⁻²·min⁻¹

(Condition: ⁹⁰Sr-⁹⁰Y source, active area Φ25 mm, 2π efficiency ≥ 50%)

α/β Crosstalk Rejection

α spillover into β channel: ≤ 1% (²³⁹Pu)

β spillover into α channel: ≤ 0.1% (⁹⁰Sr-⁹⁰Y)

Efficiency Repeatability

α ≤ 2%; β ≤ 2.5%

Long-Term Stability

Efficiency drift ≤ 1% for both α and β (after 24 h continuous operation)

Background Stability

Background fluctuation within Nb ± 3σ over 24 h

(Nb = mean background count; σ = standard deviation)
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