Evidence for multiphonon giant resonances in electromagnetic fission of 238U |
| |
Authors: | Ilievski S,Aumann T,Boretzky K,Elze Th W,Emling H,Grünschloss A,Holeczek J,Holzmann R,Kozhuharov C,Kratz J V,Kulessa R,Leistenschneider A,Lubkiewicz E,Ohtsuki T,Reiter P,Simon H,Stelzer K,Stroth J,Sümmerer K,Wajda E,Waluś W LAND Collaboration |
| |
Affiliation: | Institut für Kernphysik, Johann Wolfgang Goethe-Universit?t, D-60486 Frankfurt, Germany. |
| |
Abstract: | Differential cross sections for electromagnetic fission of 238U projectiles (500 MeV/u) in C, Sn, and Pb targets are measured and analyzed in terms of single- and multiphonon giant resonance excitations as doorway states to fission. A novel experimental method exploits the linear relationship between neutron multiplicity and the primary 238U excitation energy. Multiphonon states contribute up to 20% of the cross section; a component at high excitation energies is indicated that may arise from three-phonon dipole and two-phonon GDR x GQRiv giant resonance excitations. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|