Published 1973
| Published
Journal Article
Open
Observations of Low Energy Hydrogen and Helium Isotopes during Solar Quiet Times
Abstract
We report a new quiet-time measurement of the relative abundance of cosmic-ray ^2H and ^4He. The observations were made in selected time intervals between September 1972 and February 1973 with the Caltech Electron/Isotope Spectrometer on IMP-7. In the energy interval 13-29 MeV/nucleon, we find an upper limit to the ^2H to ^4He ratio of Γ(^2H/^4He)< 0.06. This new upper limit is significantly lower than finite ^2H/^4He ratios measured in earlier years by other workers. Possible implications of this new result are discussed.
Additional Information
© 1973 University of Colorado. Provided by the NASA Astrophysics Data System. This work was supported in part by NASA under contract NAS5-11066 and Grant 05-002-160. One of us (Hurford) received support from the National Research Council of Canada while another (Stone) was an Alfred P. Sloan research fellow during this period. Space Radiation Laboratory SRL ID #: 1973-05Attached Files
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Additional details
- Eprint ID
- 44804
- Resolver ID
- CaltechAUTHORS:20140409-085000539
- NAS5-11066
- NASA
- NGR-05-002-160
- NASA
- National Research Council of Canada (NRCC)
- Alfred P. Sloan Research Fellowship
- Created
-
2014-04-10Created from EPrint's datestamp field
- Updated
-
2020-02-20Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1973-05