Study of the fission decay of the isoscalar monopole resonance via the 238U(α, α′) reaction at 0° |
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Authors: | R De Leo S Brandenburg AG Drentje MN Harakeh H Janszen A Van Der Woude |
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Institution: | Kernfysisch Versneller Instituut, 9747 AA Groningen, The Netherlands |
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Abstract: | The fission decay of 238U has been investigated using inelastic scattering of 120 MeV ga-particles to excite the 238U nucleus. Angular correlations of the fission fragments have been measured for excitation energies between 5.7 and 15.7 MeV in coincidence with inelastically scattered α-particles between 0 and 3°. The difference in yield for fission in coincidence with inelastically scattered α-particles between 0–1.35° and 1.35–3° was used to deduce the fission decay of the giant monopole resonance. It was found that in the fission decay channel (22 ± 5)% of the E0 EWSR strength is located between 8 and 15 MeV excitation energy. The distribution of the deduced monopole strength is in agreement with recent theoretical calculations predicting splitting of the giant monopole resonance in deformed nuclei. |
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Keywords: | Nuclear Reactions |
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