Observations of low energy hydrogen and helium isotopes during solar quiet timesResults of a new quiet-time measurement of the relative abundance of cosmic-ray H-2 and He-4. 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 from 13 to 29 MeV/nucleon, an upper limit to the H-2 to He-4 ratio of less than 0.06 is found. This new upper limit is significantly lower than finite H-2/He-4 ratios measured in earlier years by other workers. Possible implications of this new result are discussed.
Document ID
19740047401
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hurford, G. J.
Mewaldt, R. A.
Stone, E. C.
Vogt, R. E. (California Institute of Technology Pasadena, Calif., United States)