2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81240Ultra-relativistic Au+Au collisions at RHIC ($\sqrt{s}$=130, 200 GeV) are used to study production of rare anti-nuclei. These clusters of anti-nucleons are formed by coalescence, i.e. overlapping wave functions of anti-nucleons. The coalescence coefficients $B_2$ for Anti-$d$ and $B_3$ for Anti-$^3He$ are determined, and used to derive the fireball radius.5 pages, 5 figures. 8th International Conference on Clustering Aspects of Nuclear Structure and Dynamics, November 28, 2003, Nara, JapanNuclear Experimenttext