NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Solar cosmic ray composition above 10 MeV/nucleon and its energy dependence in the 4 August 1972 eventObservations of the proton, helium (C,N,O) and Fe-group nuclei fluxes made during the large 4 August 1972 solar particle event are presented. The results show a small, but significant variation of the composition of multicharged nuclei as a function of energy in the energy region above 10 MeV/nucleon. In particular, the He/(C,N,O) abundance ratio varies by a factor approximately 2 between 10 and 50 MeV/nucleon, and the Fe-group/(C,N,O) ratio suggests a similar variation. Abundance ratios from the 4 August 1972 event are compared as a function of energy with ratios measured in other solar events. At energies approximately greater than 50 MeV/nucleon, the He/(C,N,O) abundance ratio for August 1972 is consistent with all earlier measurements made above that energy.
Document ID
19740009412
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Bertsch, D. L. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Biswas, S. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Reames, D. V. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1974
Subject Category
Space Radiation
Report/Patent Number
NASA-TM-X-70590
X-662-74-32
Accession Number
74N17525
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available