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Extraterrestrial helium trapped in fullerenes in the sudbury impact structure
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Poreda, Robert J. Bada, Jeffrey L. Becker, Luann |
| Copyright Year | 1996 |
| Description | Fullerenes (C60 and C70) in the Sudbury impact structure contain trapped helium with a He-3/He-4 ratio of 5.5 x 10(exp -4) to 5.9 x 10(exp -4). The He-3/He-4 ratio exceeds the accepted solar wind value by 20 to 30 percent and is higher by an order of magnitude than the maximum reported mantle value. Terrestrial nuclear reactions or cosmic-ray bombardment are not sufficient to generate such a high ratio. The He-3/He-4 ratios in the Sudbury fullerenes are similar to those found in meteorites and in some interplanetary dust particles. The implication is that the helium within the C60 molecules at Sudbury is of extraterrestrial origin. |
| File Size | 426046 |
| Page Count | 5 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980028458 |
| Archival Resource Key | ark:/13960/t1ck3bc30 |
| Language | English |
| Publisher Date | 1996-04-12 |
| Access Restriction | Open |
| Subject Keyword | Geophysics Molecules Meteorites Helium Isotopes Fullerenes Helium Solar Wind Interplanetary Dust Nuclear Reactions Cosmic Rays Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
