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In their approach the Udagwa and Tamura theory was used to deduce the spectra of neutrons and protons transferred into the target nucleus (stripping to bound states and breakup-capture in the continuum); these were then assumed to initiate three-quasiparticle preequilibrium cascade and evaporation. The deuteron cross-section that does not undergo stripping or breakup-capture was assumed to initiate a separate preequilibrium cascade and evaporation. e. the breakup and also the remaining cross-sections coming from the optical model reaction cross-section that did not undergo breakup.
With these last two equations and the Ericson partial state density expression, we can calculate absolute PE spectra with Eq. 6). When we calculate N-N collision rates in the code ALICE, we have two options. 53]; the other is to use 27 Eq. 62] weighted for composite nucleus N and Z (rather than using the approximation of Eq. 10). All the discussions above apply to a single precompound nucleon emission. 27]). g. a (p, 2p) reaction on a heavy element target. There are two types of multiple precompound decay which might be considered.
We described calculations by four different groups using mostly global parameters. We identified several deficiencies in reaction formalisms used in the calculations. We showed poor fit to the data for the lighter targets and provided an example of how to incorporate breakup effects in the ALICE-91 calculations for the deuteron-induced reactions. We show two examples of excellent fit to the data, one in which full HauserFeshbach calculation was done by Gul and the other from the Obninsk group where better level density data were used.