| Abstract: | A low-cost instrument has been developed for quantitative determinations of beryllium in the field by activation analysis. The instrument makes use of the gamma-neutron reaction between gammas emitted by an artificially radioactive source (Sb124) and beryllium as it occurs in nature. The instrument and power source are mounted in a panel-type vehicle. Samples are prepared by hand-crushing the rock to approximately ?-inch mesh size and smaller. Sample volumes are kept constant by means of a standard measuring cup. Instrument calibration, made by using standards of known BeO content, indicates the analyses are reproducible and accurate to within ? 0.25 percent BeO in the range from 1 to 20 percent BeO with a sample counting time of 5 minutes. Sensitivity of the instrument maybe increased somewhat by increasing the source size, the sample size, or by enlarging the cross-sectional area of the neutron-sensitive phosphor normal to the neutron flux. |
| Genre: | USGS Numbered Series |
| ProdID: | 3324 |
| Citation Author: | Vaughn, William W.; Wilson, E. E.; Ohm, J. M. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 9 p. :illus. ;27cm. |
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| Citation Publisher: | [U.S. Geological Survey], |
| Citation Series: | Circular |
| Citation Series Code: | CIR |
| Citation Series Number: | 427 |
| Citation Search Results Text: | A field instrument for quantitative determination of beryllium by activation analysis; 1960; CIR; 427; Vaughn, William W.; Wilson, E. E.; Ohm, J. M. |
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| Citation Year: | 1960 |
| Type: | citation/reference |
| Text: | A field instrument for quantitative determination of beryllium by activation analysis; 1960; CIR; 427; Vaughn, William W.; Wilson, E. E.; Ohm, J. M. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/circ/1960/0427/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/circ/1960/0427/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | [U.S. Geological Survey], |
