Evidence for nonequilibrium particle emission before symmetric disintegration of a composite system formed in the 16O+40Ca reaction at 230 MeV |
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| Institution: | 1. Cancer Therapeutics Program, University of Pittsburgh Cancer Institute, Pittsburgh, PA, USA;2. Department of Pharmaceutical Sciences, School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA;3. Aix-Marseille University, Faculty of Pharmacy, Pharmacokinetics, Toxicokinetics Department, Marseille, France;4. Division of Hematology-Oncology, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA;5. Vertex Pharmaceuticals, Preclinical Safety Assessment-Bioanalysis, Boston, MA, USA;6. Investigational Drug Branch, Cancer Therapy Evaluation Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Bethesda, MD, USA;7. Department of Radiation Oncology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA;8. Department of Pharmacology and Chemical Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA |
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| Abstract: | Measurement of fragment-fragment correlations in the reactions of 230 MeV 16O with 40Ca and 280 MeV32S with 24Mg have been used to isolate processes in which symmetric decay follows nonequilibrium emission of one or two alpha particles. At the higher energy per nucleon. in contrast to previous observations for lower velocity projectiles, nonequilibrium emission followed by symmetric decay has approximately the same probability as the symmetric fission following complete fusion. |
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