Abstract
We present results of hydrodynamic calculations of iron core collapse and subsequent shock propagation using the 12M/sub c/irdot and 15M/sub c/irdot initial models of Woosley and Weaver. A softening of the equation of state of neutron-rich nuclear matter at high density and the effects of general relativity play a crucial role in generating successful, prompt explosions. The energy of the explosion varies from (approx. 1 to 3) x 10/sup 51/ ergs depending upon the degree of softness.
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