DUAL ALPHA SPECTROMETER. A SELF-CONTAINED, DOUBLE-WIDE NIM MODULE THAT CONTAINS TWO INDEPENDENT ALPHA-SPECTROSCOPY CHANNELS. EACH CHANNEL INCLUDES VACUUM CHAMBER, SAMPLE HOLDER, DETECTOR, BIAS SUPPLY, PREAMPLIFIER, AMPLIFIER, BIASED AMPLIFIER, TEST PULSER AND DISCRIMINAT. SEPARATE ENERGY RANGE SELECTIONS FOR EACH CHANNEL : 3-5, 4-6, OR 5-7 MeV AND 3-7, 4-8, OR 5-9 MeV. AVAILABLE WITH DETECTOR AREAS OF 200mm SQ, 400 mm SQ AND 600mm SQ.- FOR DETECTION OF POWER OF ALPHA IONS.

CLASSIFICATION IS DETERMINED BY THE PROVISIONS OF: GENERAL INTERPRETATIVE RULES 1: TERMS OF HEADING 9030 INCLUDES, APPARATUS FOR MEASURING OR DETECTING IONISING RADIATION AND 6: TERMS OF ONE-DASH SUBHEADING 9030.10, INSTRUMENTS OR APPARATUS FOR MEASURING OR DETECTING IONISING RADIATIONS. CN: 90301090, OTHER.