CaltechAUTHORS
  A Caltech Library Service

Observations of Hydrogen and Helium Isotopes in Solar Cosmic Rays

Hurford, G. J. and Stone, E. C. and Vogt, R. E. (1975) Observations of Hydrogen and Helium Isotopes in Solar Cosmic Rays. In: Proceedings of the 14th International Cosmic Rays Conference. Vol.5. Max Planck Gesellschaft , pp. 1624-1629. http://resolver.caltech.edu/CaltechAUTHORS:20140410-133320235

[img]
Preview
PDF - Published Version
See Usage Policy.

527Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20140410-133320235

Abstract

Hydrogen and helium isotopes in solar cosmic rays between 1.2 and 15.0 MeV/nuc have been observed with the Ca1tech Electron/Isotope Spectrometer on IMP-7. During 1973 three "^3He rich events", containing more ^3He than ^2H or ^3H, were observed on 14 February, 29 June, and 5 September. The latter event was particularly interesting in that (^3He/^4He) ~ 6 and (^3He/^1H) ~ 1. Excluding these three events, flare-averaged ratios for ^2H/^1H and ^3H/^1H have been obtained for energies below 8.6 MeV/nuc. When compared with the ratios at higher energies, the observed energy dependence is consistent with the thin target model of Ramaty and Kozlovsky with a relativistic pathlength of ~ 1 g/cm^2. Flare-averaged ^3He results reported here might suggest a somewhat longer pathlength.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
http://adsabs.harvard.edu/abs/1975ICRC....5.1624HADSArticle
Contact Email Address:dmiles@caltech.edu
Additional Information:© 1975 MPE. Provided by the NASA Astrophysics Data System. This work was supported in part by the National Aeronautics and Space Administration under contract NAS5-11066 and grant NGR 05-002-160.
Group:Space Radiation Laboratory
Funders:
Funding AgencyGrant Number
NASANAS5-11066
NASANGR 05-002-160
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1975-06
Record Number:CaltechAUTHORS:20140410-133320235
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140410-133320235
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44862
Collection:CaltechAUTHORS
Deposited By: SWORD User
Deposited On:14 Apr 2014 23:53
Last Modified:14 Apr 2014 23:53

Repository Staff Only: item control page