PC-Based Gamma MCA System - Model 733
Introduction

The Model 733 is an affordable PC-based gamma spectroscopy system conveniently packaged to run directly on your PC. The system includes a detector, USB cable, and PC Spectrum Acquisition & Analysis Software (SAAS). The Model 733 gamma detector is a combined MCA, HV Power Supply and 7.6 x 7.6 cm (3 x 3 inch) NaI(Tl) scintillator. Ludlum also offers a Model 732 that is identical, except it incorporates a smaller 5.1 x 5.1 cm (2 x 2 inch) NaI(Tl) scintillator. The detector receives its power directly from the PC via the USB interface so no extra cables are required.  

The MCA is equipped with 1024 channels and utilizes a 10-bit Wilkinson type ADC. Spectra are acquired and then sent via the USB interface to the PC once every second where they are analyzed and stored by the SAAS software. The SAAS software package is a very basic and user-friendly program that facilitates spectrum acquisition and analysis. Once calibrated, the user can acquire live streaming data or previously stored spectra and perform peak analysis, select user-defined ROIs, and exercise spectrum stabilization, stripping, smoothing, and normalization math routines. Spectral data can also be exported to more powerful MCA programs to perform additional quantitative and qualitative analysis for determining the activity and isotope identification.