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- W2020489085 abstract "In this third paper in a series in which the characteristics of nuclear fragments produced in the interaction of 5-GeV protons with Ag and U targets were studied by means of $frac{mathrm{dE}}{dxensuremath{-}E}$ measurements with semiconductor detector telescopes new information was obtained on the energy spectra of light fragments. One set of measurements on fragments from a Ag target involved the use of a two-element telescope incorporating a $ensuremath{Delta}E$ detector as thin as 16 ensuremath{mu}m. A new algorithm for processing the $ensuremath{Delta}E$ and $E$ data to extract particle identification was developed and the resulting particle spectra showed superior resolution for the elements from Li ($Z=3$) to S ($Z=16$). Segments of the energy spectra of each of these elements were measured at 20ifmmode^circelsetextdegreefi{} and, for many of them, also at 45, 90, 135, and 160ifmmode^circelsetextdegreefi{} to the beam direction. By use of three-element telescopes and absorbers the high-energy part of the energy spectrum for isotopes of He, Li, Be, B, and C ejected from Ag and U targets was measured at 20ifmmode^circelsetextdegreefi{}. The measurements extended beyond 300 MeV for $^{6}mathrm{Li}$ and $^{7}mathrm{Li}$ and to 400 MeV for $^{7}mathrm{Be}$. A distinct high-energy component was found in these cases. The suitability of nuclear evaporation as a description of the emission of the low-energy fragments was tested with two simple theoretical models, one specifying isotropic fragment emission from a moving nucleus at a fixed nuclear temperature and one specifying isotropic fragment emission from a set of moving nuclei with a Maxwellian distribution of excitation energies and forward momenta. The second could describe rather well all the 90ifmmode^circelsetextdegreefi{} data, provided a Coulomb barrier 0.4 that of the classical tangent-spheres barrier was used. However, the measured intensity in the forward direction was much higher than predicted. Neither evaporation calculation was able to describe the highest-energy part of the spectra, and the conclusion was drawn that these particles must be produced in the initial high-energy cascade." @default.
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- W2020489085 title "Energy Spectra of Fragments from Silver and Uranium Bombarded with 5.0-GeV Protons" @default.
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- W2020489085 doi "https://doi.org/10.1103/physrevc.7.1611" @default.
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