| Autor: |
Madey, Richard, Zhang, Wei-Ming, Anderson, Bryon D., Baldwin, Alan Richard, Elaasar, Mostafa, Flanders, Bruce S., Keane, Declan, Pairsuwan, Weerapong, Varga, J., Watson, John W., Westfall, Gary D., Hartnack, Christoph, Stöcker, Horst, Frankel, Kenneth A. |
| Jazyk: |
angličtina |
| Rok vydání: |
2006 |
| Předmět: |
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| Popis: |
Inclusive neutron spectra were measured at 0°, 4°, 8°, 15°, 30°, and 42° from Nb-Nb and Au-Au collisions at 800 MeV/nucleon. A peak that originates from neutron evaporation from the projectile appears in the spectra at angles out to 8°. The shapes and magnitudes of the spectra are compared with those calculated from models of nucleus-nucleus collisions. The differential cross sections for Au-Au collisions are about four times those for Nb-Nb collisions. The predictions of the Vlasov-Uehling-Uhlenbeck (VUU) and QMD theories agree with the angular distributions of the differential cross sections except at small angles; the VUU prediction overestimates the angular distributions from a few degrees to about 20°, whereas the QMD prediction underestimates the angular distributions below 8°. The Firestreak model overestimates the angular distribution for Nb-Nb collisions and underestimates it for Au-Au collisions. Also, the VUU and QMD models agree with the measured double-differential cross sections in more angular and energy regions than the Firestreak and intranuclear cascade models; however, none of the models can account for the peaks at small angles (θ≤15°). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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