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Behavior of nuclear matter under extreme conditions in fission |
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| Authors: | J. H. Hamilton A. V. Ramayya J. K. Hwang G. M. Ter-Akopian A. V. Daniel T. N. Ginter C. J. Beyer J. Kormicki X. Q. Zhang A. M. Rodin A. S. Fomichev J. Kliman L. Krupa J. Jandel Yu. Ts. Oganessian W. Greiner D. N. Poenaru G. Chubaryan D. Seweryniak R. V. F. Janssens J. O. Rasmussen S. C. Wu R. Donangelo W. C. Ma R. B. Piercey J. D. Cole |
| Affiliation: | 1. Department of Physics, Vanderbilt University, 37235, Nashville, TN, USA 2. Flerov Lab. for Nuclear Reactions, JINR, Dubna, Russia 3. Joint Institute for Heavy Ion Research, 37831, Oak Ridge, TN, USA 4. Lawrence Berkeley National Laboratory, 94720, Berkeley, CA, USA 5. Institute of Physics, Bratislava, Slovakia 6. Johann Wolfgang Goethe University, Frankfurt, Germany 7. Institute of Atomic Physics, Bucharest, Romania 8. Cyclotron Institute, Texas A&M University, 77843, College Station, TX, USA 9. Argonne National Laboratory, 60439, Argonne, IL, USA 10. Inst. de Fisica, Universidade Federal de Rio de Janeiro, Rio de Janeiro, Brazil 11. Department of Physics, Mississippi State University, 39762, MS, USA 12. Idaho National Engr. and Environmental Lab., 83415, Idaho Falls, ID, USA |
| Abstract: | The spontaneous fission of 252Cf has been studied via γ-γ-γ coincidence and γ-γ light charged particle coincidence with Gammasphere. The binary fission yields of correlated Mo?Ba pairs with 0–10 neutron emission have been remeasured. The existence of “hot” fission mode with 8–10 neutron emission seen previously in the Mo?Ba split is confirmed but with lower intensities. By gating on the light charged particles detected in ΔE-E detectors and a γ ray in one partner, the relative yields of correlated pairs in alpha ternary SF with zero to 6n emission are observed for the first time with the distribution peaked at 2.5n. New correlated pairs are identified in 10Be ternary SF. We observed essentially only cold, On 10Be and little, if any, hot, xn 10Be. New γ-γ-γ data with 2.3 times the total events show weak non-Doppler broadened high energy peaks in coincidence with transitions in correlated pairs in 10Be SF shifted by the same 6,1 to 26 keV from the 2-0 energy in 10Be as seen earlier. |
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