JUPITER DATA CONFIRMS LOCAL ELEMENT SYNTHESIS.
O. Manuel1, K. Windler2. Chemistry Departments, 1. University of Missouri, Rolla, MO 65401; 2. University of Illinois, Champaign, IL 61801

The Galileo space probe shows xenon in the He-rich Jupiter atmosphere with excess 136Xe and a ratio of r-products of nucleosynthesis, 136Xe/134Xe, closer to the "strange" Xe of carbonaceous chondrites (Xe-X, alias Xe-HL) than to solar-type Xe. Xe-X is also closely linked with primordial He in diverse meteorites [Science 195, 208 (1977); Meteoritics 15, 117 (1980)]. The Sun appears to be He-rich, but it contains very little Xe-X. Diffusion enriches the lighter isotopes of Xe, He, and other elements in the solar wind [Meteoritics 18, 209 (1983)] and this creates a solar surface consisting mostly of the lighter elements, H and He. Distinct from the surface is the bulk Sun with H/He <0.1 [op. cit. (1983)], which is too low to produce the high 3He/4He ratio in the solar wind by D-burning. This coupling of chemical and isotopic heterogeneities across planetary distances confirms that the solar system formed directly from unmixed debris of a local supernova, NOT from an interstellar cloud [Wasserburg, EPSL 86, 129 (1987)]. Additional evidence for these conclusions is in a preprint for Space Science Reviews [om@umr.edu].