HELIUM ION-IMPLANTATION INTO MINERALS

被引：18

作者：

FUTAGAMI, T ^{[1
]}

OZIMA, M ^{[1
]}

NAKAMURA, Y ^{[1
]}

机构：

[1] INST SPACE & ASTRONAUT SCI,SAGAMIHARA,KANAGAWA,JAPAN

来源：

EARTH AND PLANETARY SCIENCE LETTERS | 1990年 / 101卷 / 01期

关键词：

D O I：

10.1016/0012-821X(90)90124-G

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We implanted rock-forming minerals (olivine, magnetite, ilmenite, and rutile) with a 3.6 keV helium ion beam, which simulates solar wind α-particles, and analyzed implanted helium. A total fusion experiment shows that nearly 100% of impinging helium ions is trapped in a target at smaller doses, while the concentration of trapped helium tends to be saturated above a helium ion dose of ∼ 1016 ions/cm2. There is no appreciable difference in the concentration of trapped helium among minerals. A stepwise heating experiment shows that implanted helium is retained more firmly in magnetite and rutile than in olivine. On the basis of the experimental results, a high degree of loss of implanted helium out of IDPs is suggested. This may be attributed to decomposition of helium-bearing minerals in IDPs during their entry into the earth's atmosphere. © 1990.

引用

页码：63 / 67

页数：5

共 20 条

[11] ION-BOMBARDMENT-INDUCED RADIATION DAMAGE IN SOME CERAMICS AND IONIC CRYSTALS - DETERMINED BY ELECTRON DIFFRACTION AND GAS RELEASE MEASUREMENTS [J].