@article{oai:nipr.repo.nii.ac.jp:00006074,
 author = {Park,Jisun and Nagao,Keisuke},
 journal = {Antarctic meteorite research},
 month = {Mar},
 note = {P(論文), Noble gas isotopic and elemental compositions of three Antarctic eucrites Asuka-880702, Asuka-880761 and Asuka-881388 have been measured by two steps of heating temperatures (400 and 1750°C ). Cosmic-ray exposure ages calculated from cosmogenic ^(21)Ne were 20.5, 32.3 and 29.7m.y. for A-880702, A-880761 and A-881388, respectively. Combining the exposure ages with ^(81)Kr-Kr apparent exposure ages, terrestrial ages of 0.20, 0.22 and 0.23m.y. were derived for A-880702, A-880761 and A-881388, respectively. ^(244)Pu-Xe ages based on fissiogenic Xe isotopes showed that the Asuka eucrites began Xe retention at around the crystallization age of Angra dos Reis. Among the Asuka eucrites, A-880702 is about 20m.y. older than the others. From the noble gas and age data described above, we conclude that A-880761 and A-881388 are paired, but A-880702 is not.},
 pages = {213--224},
 title = {Noble gas and chronological study of Asuka eucrites: A-880761 and A-881388 are paired, but A-880702 is not},
 volume = {18},
 year = {2005}
}