Issue 1, 2005
From the journal:

Analyst

Determination of boron in materials by cold neutron prompt gamma-ray activation analysis

Rick L. Paula  

a Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA

Abstract

An instrument for cold neutron prompt gamma-ray activation analysis (PGAA), located at the NIST Center for Neutron Research (NCNR), has proven useful for the measurement of boron in a variety of materials. Neutrons, moderated by passage through liquid hydrogen at 20 K, pass through a 58Ni coated guide to the PGAA station in the cold neutron guide hall of the NCNR. The thermal equivalent neutron fluence rate at the sample position is 9 × 108 cm−2 s−1. Prompt gamma rays are measured by a cadmium- and lead-shielded high-purity germanium detector. The instrument has been used to measure boron mass fractions in minerals, in NIST SRM 2175 (Refractory Alloy MP-35-N) for certification of boron, and most recently in semiconductor-grade silicon. The limit of detection for boron in many materials is <10 ng g−1.

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Article information

DOI
https://doi.org/10.1039/B412223B
Article type
Paper
Submitted
09 Aug 2004
Accepted
12 Oct 2004
First published
24 Nov 2004

Analyst, 2005,130, 99-103

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Determination of boron in materials by cold neutron prompt gamma-ray activation analysis

R. L. Paul, Analyst, 2005, 130, 99 DOI: 10.1039/B412223B

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