@article{oai:nipr.repo.nii.ac.jp:00001389,
 author = {Komura, Kazuhisa and Tsukamoto, Masaki and Sakanoue, Masanobu},
 journal = {Memoirs of National Institute of Polar Research. Special issue},
 month = {Dec},
 note = {P(論文), Non-destructive γ-ray measurements have been made to determine cosmogenic ^<26>(Al), natural ^<40>K and fallout ^<137>(Cs) activities in 15 Antarctic meteorites (14 from Yamato Mountains and 1 from Allan Hills). The ^<26>(Al) activities range from 72 to 29 dpm/kg. If we assume that the saturation activity of ^<26>(Al) in chondrites is 60,about 1/3 of the measured meteorites show the contents close to this value; however, the rest show lower values. A simple graphical method was applied to estimate the exposure and terrestrial ages based on ^<26>(Al) and ^<53>(Mn) data, and these ages are compared with exposure ages obtained by ^<21>(Ne) measurements. The results are generally consistent with the ^<21>(Ne) data. It must be noted that the Antarctic meteorites are highly contaminated with fallout ^<137>(Cs) derived from nuclear test explosions.},
 pages = {178--187},
 title = {Non-destructive measurements of cosmogenic 26Al, natural 40K and fallout 137Cs in Antarctic meteorites},
 volume = {25},
 year = {1982}
}