Cosmic Ray Deuterium from 0.2 to 3.0 GeV/nucleon

A.J. Davis, A.W. Labrador, R.A. Mewaldt, S.M. Schindler, L.M. Barbier, E.R. Christian, K.E. Krombel, J.W. Mitchell, J.F. Ormes, R.E. Streitmatter, M. Hof, W. Menn, M. Simon, O. Reimer, R.L. Golden, S.J. Stochaj, W.R. Webber, Ib Lundgaard Rasmussen

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The abundances of cosmic ray protons and deuterium between 0.2 and 3.0 GeV/nucleon were measured by the IMAX balloon--borne magnet spectrometer during a flight in July, 1992. These isotope measurements extend to significantly higher energies than have previously been achieved. A high--resolution time--of--flight system and two silica aerogel Cherenkov counters were used in conjunction with a drift--chamber/MWPC--tracking system to determine mass by means of the velocity vs. magnetic rigidity technique. We present here the abundances of ^1H, ^2H and ^4He corrected to the top of the atmosphere, and the resulting ^2H/^1H and ^2H/^4He isotope ratios. The IMAX experiment was supported by NASA: RTOP 353--87--02 (GSFC); grants NAGW--1919 (Caltech) and NAGW--1418 (NMSU), and in Germany by the DFG and the BMFT.
Original languageEnglish
JournalAmerican Physical Society Meeting Abstracts
Publication statusPublished - 1996


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