Elsevier

Nuclear Physics A

Volume 257, Issue 1, 26 January 1976, Pages 15-28
Nuclear Physics A

Preequilibrium analysis of (p, n) spectra on various targets at proton energies of 25 TO 45 MeV

https://doi.org/10.1016/0375-9474(76)90471-1Get rights and content

Abstract

Thin target (p, n) spectra are reported for incident proton energies of 25, 35 and 45 MeV on48Ca, 90Zr and 120Sn, and at proton energies of 35 and 45 MeV on 208Pb. Angle-integrated spectra are compared with predictions of the geometry-dependent hybrid model, the hybrid model, and the hybrid model with average state lifetime. The geometry-dependent hybrid model, when combined with evaporation components, gives an excellent prediction of the overall shapes and magnitudes of the experimental results. The simpler hybrid model fails in both respects, paralleling results of earlier comparisons of (p, p') spectra with model calculations.

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    Work supported partially by the National Science Foundation, US Energy Research and Development Administration and the Office of Naval Research.

    ††

    Present address: University of Texas, Austin, Texas 78712.

    †††

    Present address: Stanford University, Stanford, CA 94305.

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