Measurement of Be-10 in 1,000- and 5,000-year-old Antarctic ice
Abstract
The nuclear accelerator spectrometry technique was used to determine Be-10 concentrations in 10-liter samples of Antarctic ice believed to be about 1,000 and 5,000 years old. On the basis of an estimated annual precipitation rate of 3.7 of water at the Antarctic collection site, the analysis yields an average Be-10 deposition rate of 0.0031 atoms per sq cm per sec. This is much less than the value obtained previously for Greenland ice and about 4 to 8 times smaller than the deposition rates found in most sea sediments. These differences may be related to differences in precipitation and/or latitude dependence of fallout rate.
- Publication:
-
Nature
- Pub Date:
- October 1978
- DOI:
- 10.1038/275731a0
- Bibcode:
- 1978Natur.275..731R
- Keywords:
-
- Antarctic Regions;
- Beryllium 10;
- Ice Environments;
- Radiation Distribution;
- Spectrometers;
- Cations;
- Core Sampling;
- Fallout;
- Latitude;
- Precipitation (Meteorology);
- Qualitative Analysis;
- Radiation Counters;
- Space Radiation