Fission Dynamics Of Atomic Clusters And Nuclei - Proceedings Of The International Workshop

In this volume, the main results of the last 60 years of research in nuclear fission are summarized, showing how ideas advanced from the beginning, for nuclei have also found useful applications in the new area of atomic clusters. The present status of the physics of fission is discussed in depth, and perspectives for further research are outlined. Preface......Page 6 CONTENTS......Page 8 Fission kills nuclear ropes loops and chains......Page 12 1 Introduction......Page 16 2 Semiclassical explanation of the onset of mass asymmetry......Page 17 3 Inclusion of spin-orbit interaction in POT......Page 19 Acknowledgment......Page 22 References......Page 23 1 Introduction......Page 24 2 The model......Page 25 3 Coupling of the pairing vibrations with the fission mode......Page 28 4 Conclusions:......Page 30 References......Page 31 Fission studies with large detector arrays......Page 32 2 A new determination of the Ba-Mo yield matrix for 252Cf......Page 33 3 Cold Binary Spontaneous Fission......Page 36 4 Light Charged Particle Ternary Fission......Page 37 5 Identification of the cold 10Be ternary SF pairs of 252Cf......Page 39 References......Page 46 1 Introduction.......Page 48 2 Dynamical jellium model.......Page 49 3 Conclusions.......Page 53 References......Page 54 Fission decay of nuclei and the extension of the periodic system......Page 56 1 Introduction......Page 76 2 The baryonic string force in the nuclear bag......Page 77 3 Derivation of the baryonic string force......Page 79 4 Nuclear liquid systems 5......Page 81 5 Phases of nuclear liquid state......Page 83 6 Conclusion......Page 85 References......Page 86 1 Introduction......Page 87 2 Global Models of Atomic-Mass Data......Page 88 3 Global Models of B~ -Decay Halflives......Page 93 References......Page 95 1 Introduction......Page 97 2 The Nonrelativistic Framework......Page 98 3 The Nuclear Structures......Page 100 References......Page 104 Neutron Halo of Fissile Nuclei......Page 105 References......Page 113 Search for possible isomer 232Pa......Page 115 REFERENCES......Page 118 Broken symmetry in nuclear matter......Page 119 References......Page 127 1 Introduction......Page 128 2 Classical droplets......Page 129 3 Quantal effects around scission......Page 134 References......Page 136 1 Introduction......Page 138 2 The EDF Theory of Fission......Page 139 References......Page 144 1 The decay of hot nuclei......Page 146 References......Page 152 1 INTRODUCTION......Page 154 2 NEW RESULTS AND CURRENT EXPERIMENTAL SITUATION......Page 155 3 MASS DISTRIBUTIONS OF COLD DECAYS......Page 160 4 TRANSITION BETWEEN CLUSTER- AND FISSION-LIKE TYPES OF DECAYS......Page 168 5 CONCLUSIONS......Page 171 ACKNOWLEDGMENTS......Page 172 References......Page 173 1 Introduction......Page 174 2 Electronic shell and supershell effects......Page 175 3 Shape deformations......Page 179 4 Fragmentation of charged clusters......Page 182 5 Optical response along the fission path......Page 191 6 From fission to fragmentation and Coulomb explosion......Page 193 Acknowledgments......Page 198 References......Page 199 1 Introduction......Page 203 2 Radiationless excitation......Page 204 3 Prompt-to-delayed fission ratio.......Page 208 4 Muon attachment probabilities......Page 209 References......Page 211 1 Introduction......Page 215 3 Results and Discussion......Page 216 4 Summary and Conclusions......Page 222 References......Page 223 2 Mixed parity bands mean assymetric bosonic structure......Page 225 3 Theoretical approaches......Page 227 4 More experiments required......Page 228 References......Page 230 1 Introduction......Page 232 2 Experimental results......Page 233 3 Theoretical model analisys......Page 235 4 Formation of neutron rich nuclides in fission......Page 239 5 Conclusion......Page 240 References......Page 241 1 Introduction and Experimental Setup......Page 243 2 Quaternary Fission......Page 247 3 Summary......Page 256 References......Page 258 1 Introduction......Page 259 3 The theory of Papenbrock and Bertsch......Page 260 4 A low energy theorem......Page 262 5 Semi-classical theory......Page 263 6 Derivation of the semi-classical result......Page 264 7 Conclusions......Page 265 8 Acknowledgments......Page 266 1 Introduction......Page 267 2 The Theory......Page 269 3 Results and Discussion......Page 271 References......Page 276 1 Introduction......Page 277 2 The reaction model......Page 278 3 Results......Page 280 References......Page 284 1 Introduction......Page 286 2 Experimental Technique......Page 288 3 Characteristics of Mass and Energy Distributions of SHE Fission Fragments......Page 294 4 Capture and fusion-fission cross sections......Page 298 5 Neutron and gamma-ray multiplicities in the fission of superheavy nuclei......Page 301 6 Experimental Results on the Synthesis of Superheavy Nuclei......Page 302 7 Discussion......Page 307 8 Addendum......Page 310 References......Page 311 1 Introduction......Page 313 3 Results and Discussion......Page 314 4 Summary......Page 319 References......Page 321 1 Experiment......Page 322 2 Results......Page 323 3 Conclusion......Page 327 References......Page 328 Possible explanation of the difference in nuclear fission induced by the intermediate energy protons and neutrons......Page 329 References......Page 334 1 Introduction......Page 335 2 Energy balance at scission......Page 336 3 The distribution of excitation energy in the fission fragments......Page 337 4 Conclusions......Page 341 References......Page 342 Machine generated contents note: Fission kills nuclear ropes, loops and chains J. A. Wheeler Semiclassical calculation of shell effects in deformed nuclei M. Brack and Ch. Aman Coupling of the collective pairing vibrations with the fission mode K. Pomorski Fission studies with large detector arrays J. K. Hwang, C. J. Beyer, A. V. Ramayya, J. H. Hamilton, G. M. Ter Akopian, A. V. Daniel, J. O. Rasmussen, S. -C. Wu, R. Donangelo, J. Kormicki, X. Q. Zhang, A. Rodin, A. Formichev, J. Kliman, L. Krupa, Yu. Ts. Oganessian, G. Chubaryan, D. Seweryniak, R. V. F. Janssens, W. C. Ma, R. B. Piercey and J. D. Cole Adiabatic and non-adiabatic dynamics of ions in the formation of electron excitation widths in metal clusters A. V. Solov'yov Fission, decay of nuclei and the extension of the periodic system W. Greiner Fission in (the light of) a quark-gluon liquid theory of the nucleons H. Bohr Statistical modeling of nuclear systematics J. W. Clark, E. Mavrommatis, S. Athanassopoulos, A. Dakos and K. Gernoth Toroidal structures in light nuclei A. Arriaga Neutron Halo of Fissile Nuclei V. I. Serov, S. N. Abramovich and F. F. Karpeshin Search for possible isomer 232Pa E. F. Fomushkin, S. N. Abramovich and M. F. Andreev Broken symmetry in nuclear matter A. W. Overhauser and A. E. Pozamantir The diverse manifestations of fission of classical and quantal droplets H. J. Krappe Energy-density functional approach to fission and half-lives of superheavy elements I. Reichstein and F. B. Malik Decay channels of hot nuclei and hot metalic clusters P. Frdbrich Cluster radioactivity A. A. Ogloblin, G. A. Pik-Pichak and S. P. Tretyakova Static and dynamical properties of simple metal clusters: Analogies with atomic nuclei J. A. Alonso, M. Barranco, F. Garcias, P. -G. Reinhard and E. Suraud The role of exotica in studying nuclear fission F. F. Karpeshin Particle-acompanied fission M. Mutterer, Yu. N. Kopatch, D. Schwalm and F. Gonnenwein Alpha-particle structure on the surface of the atomic nucleus M. Brenner Superasymmetric fission V. A. Rubchenya Quaternary fission F. Gnnenwein, P. Jesinger, M. Mutterer, A. M. Gagarski, G. A. Petrov, W. H. Trzaska, V. Nesvishevsky and 0. Zimmer Bremsstrahlung emission in alpha-decay D. M. Brink A model for particle induced fission F. B. Malik On the half-lives of trinuclear molecules A. Sndulescu, F. Carstoiu, I. Bulboacd and W. Greiner Fusion-fission reactions of heaviest nuclei. Synthesis of superheavy elements with Z = 114 and 116 Yu. Ts. Oganessian, M. G. Itkis and V. K. Utyonkov Puzzling results on nuclear shells from the properties of fission channels K. -H. Schmidt, A. R. Junghans, J. Benlliure, C. Bockstiegel, H. -G. Clerc, A. Grewe, A. Heinz, M. De Jong and S. Steinhiiuser Emission of light charged particles from fission fragments of uranium nuclei induced by slow negative muons and pions, protons with energy of 153 and 1000 MeV and negative pions at 1700 MeV G. E. Belovitzkiy and 0. M. Shteingrad Possible explanation of the difference in nuclear fission induced by the intermediate energy protons and neutrons V. E. Bunakov, L. V. Krasnov and A. V. Fomichev Scission configurations in cold fission S. Miicu, P. Quentin and N. Pillet. In this volume, the main results of the last sixty years of research in nuclear fission are summarized, showing how ideas advanced from the beginning, for nuclei have also found useful applications in the new area of atomic clusters. The present status of the physics of fission is discussed in depth, and perspectives for further research are outlined. Contents: Fission Studies with Large Detector Arrays (J K Hwang et al.); Fission, Decay of Nuclei and the Extension of the Periodic System (W Greiner); Neutron Halo of Fissile Nuclei (V I Serov et al.); Decay Channels of Hot Nuclei and Hot Metali Preface; CONTENTS; Fission kills nuclear ropes loops and chains; Semiclassical calculation of shell effects in deformed nuclei; 1 Introduction; 2 Semiclassical explanation of the onset of mass asymmetry; 3 Inclusion of spin-orbit interaction in POT; Acknowledgment; References; Coupling of the collective pairing vibrations with the fission mode; 1 Introduction; 2 The model; 3 Coupling of the pairing vibrations with the fission mode; 4 Conclusions:; Acknowledgments; References; Fission studies with large detector arrays; 1 Introduction; 2 A new determination of the Ba-Mo yield matrix for 252Cf The diverse manifestations of fission of classical and quantal droplets1 Introduction; 2 Classical droplets; 3 Quantal effects around scission; 4 Conclusions; References; Energy-density functional approach to fission and half-lives of superheavy elements; 1 Introduction; 2 The EDF Theory of Fission; References; Decay channels of hot nuclei and hot metalic clusters; 1 The decay of hot nuclei; References; Cluster radioactivity; 1 INTRODUCTION; 2 NEW RESULTS AND CURRENT EXPERIMENTAL SITUATION; 3 MASS DISTRIBUTIONS OF COLD DECAYS; 4 TRANSITION BETWEEN CLUSTER- AND FISSION-LIKE TYPES OF DECAYS 5 CONCLUSIONSACKNOWLEDGMENTS; References; Static and dynamical properties of simple metal clusters: Analogies with atomic nuclei; 1 Introduction; 2 Electronic shell and supershell effects; 3 Shape deformations; 4 Fragmentation of charged clusters; 5 Optical response along the fission path; 6 From fission to fragmentation and Coulomb explosion; Acknowledgments; References; The role of exotica in studying nuclear fission; 1 Introduction; 2 Radiationless excitation; 3 Prompt-to-delayed fission ratio.; 4 Muon attachment probabilities; References; Particle-acompanied fission; 1 Introduction 3 Derivation of the baryonic string force4 Nuclear liquid systems 5; 5 Phases of nuclear liquid state; 6 Conclusion; Acknowledgments; References; Statistical modeling of nuclear systematics; 1 Introduction; 2 Global Models of Atomic-Mass Data; 3 Global Models of B~ -Decay Halflives; Acknowledgments; References; Toroidal structures in light nuclei; 1 Introduction; 2 The Nonrelativistic Framework; 3 The Nuclear Structures; References; Neutron Halo of Fissile Nuclei; References; Search for possible isomer 232Pa; REFERENCES; Broken symmetry in nuclear matter; References 3 Cold Binary Spontaneous Fission4 Light Charged Particle Ternary Fission; 5 Identification of the cold 10Be ternary SF pairs of 252Cf; 6 Acknowledgment; References; Adiabatic and non-adiabatic dynamics of ions in the formation of electron excitation widths in metal clusters; 1 Introduction.; 2 Dynamical jellium model.; 3 Conclusions.; Acknowledgments; References; Fission decay of nuclei and the extension of the periodic system; Fission in (the light of) a quark-gluon liquid theory of the nucleons; 1 Introduction; 2 The baryonic string force in the nuclear bag