A field instrument for quantitative determination of beryllium by activation analysis

Geological Survey research 1965, Chapter B

“…Several instruments using the Be 9 (gamma-neutron) Be 8 reaction for low-level beryllium determinations have been reported (Brownell, 1959;Vaughn, 1960;Mezhiborskaya, 1962). The principal differences between the earlier instruments and the instrument described here are the use of B 10 -lined low-voltage proportional counters for thermal neutron detection, a remotely operated pneumatic "rabbit" system for handling the radioactive source safely and reliably, and an annular-shaped sensitive chamber.…”

Geology of the beryllium deposits in the Thomas Range, Juab County, Utah

“…Activation analysis measures neutrons released by beryllium when it is struck by gamma-rays. Several instruments for activation analysis have been described (Cantwell, Hawkes, and Rasmussen, 1958;Brownell, 1959;and Vaughn, Wilson, and Ohm, 1960). I used the instrument described by Vaughn, Wilson, and Ohm (1960).…”

“…Several instruments for activation analysis have been described (Cantwell, Hawkes, and Rasmussen, 1958;Brownell, 1959;and Vaughn, Wilson, and Ohm, 1960). I used the instrument described by Vaughn, Wilson, and Ohm (1960). More than 150 analyses were made on coarsely ground samples of unsorted tuff and nodules.…”

“…The Thomas Range is the first place in which beryllium minerals have been found in tuff. The development of nuclear beryllium detectors for use in the field, such as described by Brownell ( 1959) and Vaughn, Wilson, and Ohm (1960), made this discovery possible. Although these instruments should aid in finding finely disseminated beryllium deposits in tuff in other areas, a study of the Thomas Range beryllium deposits will give some guidelines in exploring and developing similar deposits elsewhere.…”