Incorporation of short-lived 10Be in a calcium-aluminum-rich inclusion from the Allende meteorite

被引：257

作者：

McKeegan, KD ^{[1
]}

Chaussidon, M

Robert, F

机构：

[1] Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA

[2] Ctr Rech Petrog & Geochim, CNRS, F-54501 Vandoeuvre Nancy, France

[3] Museum Natl Hist Nat, F-75015 Paris, France

来源：

SCIENCE | 2000年 / 289卷 / 5483期

关键词：

D O I：

10.1126/science.289.5483.1334

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Enrichments in boron-10/boron-11 in a calcium-aluminum-rich inclusion from the Allende carbonaceous chondrite are correlated with beryllium/boron in a manner indicative of the in situ decay of short-lived beryllium-10. Because this radionuclide is produced only by nuclear spallation reactions, its existence in early solar system materials attests to intense irradiation processes in the solar nebula. The particle fluence inferred from the initial beryllium-10/beryllium-9 is sufficient to produce other short-lived nuclides, calcium-41 and manganese-53, found in meteorites, but the high canonical abundance of aluminum-26 may still require seeding of the solar system by radioactive stellar debris.

引用

页码：1334 / 1337

页数：4

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