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| 1 | Competition between fusion-evaporation and multifragmentation in central collisions in ^(58)Ni+^(48)Ca at 25A MeV显示文摘The experimental data concerning the58Ni+48Ca reaction at Elab(Ni)=25A MeV,collected by using the CHIMERA 4π device,have been analyzed in order to investigate the competition among different reaction mechanisms for central collisions in the Fermi energy domain.As a main criterion for centrality selection we have chosen the flow angle(flow) method,making an event-by-event analysis that considers the shape of events,as it is determined by the eigenvectors of the experimental kinetic-energy tensor.For the selected central events(flow >60°) some global variables,good to characterize the pattern of central collisions have been constructed.The main features of the reaction products were explored by using different constraints on some of the relevant observables,like mass and velocity distributions and their correlations.Much emphasis was devoted,for central collisions,to the competition between fusion-evaporation processes with subsequent identification of a heavy residue and a possible multifragmentation mechanism of a well defined(if any) transient nuclear system.Dynamical evolution of the system and pre-equilibrium emission were taken into account by simulating the reactions in the framework of transport theories.Different approaches have been envisaged(dynamical stochastic BNV calculations + sequential SIMON code,QMD,CoMD,etc.).Preliminary comparison of the experimental data with BNV calculations shows reasonable agreement with the assumption of sequential multifragmentation emission in the mass region of IMFs close to the heavy residues.Possible deviations from sequential processes were found for those IMFs in the region of masses intermediate between the mass of heavy residues and the mass of light IMFs.Further simulations are in progress.The experimental analysis will be enriched also by information obtained inspecting the IMF-IMF correlation function,in order to elucidated the nature of space-time decay property of the emitting source associated with events having the largest IMF multiplicity. | FRANCALANZA L ABBONDANNO U AMORINI F BARLINI S BINI M BOUGAULT R BRUNO M CARDELLA G CASINI G AGOSTINO M D' De FILIPPO V De SANCTIS J GERACI E GIUSSANI A GRAMEGNA F GUIOT B KRAVCHUK V La GUIDARA E LANZALONE G Le NEINDRE N MAIOLINO C MARINI P MORELLI L OLMI A PAGANO A PAPA M PIANTELLI S PIRRONE S POLITI G POGGI G PORTO F RUSSOTTO P RIZZO F VANNINI G VANNUCCI L | 2013 | Nuclear Science and Techniques2013，24，5： | 2 |
| 2 | Raman effect in zinc oxide显示文摘 | Damen T C Porto S P S Tell B | 1966 | Phys Rev1966，142，2： | 1 |
| 3 | Raman effect in zinc oxide显示文摘 | Damen T C Porto S P Tell B | 1966 | Phys Rev1966，142，： | 1 |
| 4 | Plant promoters: an approach of structure and function 显示文摘 | Porto M S Pinheiro M P Batista V G | 2014 | Molecular Biotechnology2014，56，1： | 1 |
| 5 | The thermal lens effect as a power-limiting device 显示文摘 | Leite R C C Porto S P S Damen T C | 1967 | J Appl Phys Left1967，，1： | 1 |
| 6 | Antisense inhibition of thyrotropin-releasing hormone reduces arterial blood pressure in spontaneously hypertensive rats显示文摘 | GARCIA S I ALVAREZ A L PORTO P I | 2001 | Hypertension2001，37，22： | 1 |
| 7 | Nor- mal mode determination in crystals显示文摘 | ROUSSEAU D L BAUMAN R P PORTO S PS | 1981 | J Raman Spee- trosc1981，10，1： | 1 |
| 8 | Intravascular ultrasound as a significant tool for diagnosis and management of coronary a- neurysms显示文摘 | Porto I MacDonald S Banning A P | 2004 | Cardiovasc Intervent Radiol2004，27，6： | 1 |
| 9 | Relative finite determinacy and relative stability of function - germs 显示文摘 | PORTO P F S LOIBEL G F | 1978 | Bol Soc Bras Mat1978，9，2： | 1 |
| 10 | First-order Raman effect in wurtzite-type crystals显示文摘 | Arguello C A Rousseau D L Porto S P S | 1969 | Phys Rev1969，181，3： | 1 |
| 11 | Raman spectra of TiO2,MgF2,ZnF2,FeF2,and MnF2显示文摘 | PORTO S P S FLEURY P A DAMEN T C | 1967 | Phys Rev1967，4，： | 1 |
| 12 | On relative stability of function-germs显示文摘 | PORTO P F S | 1983 | Bol Soc Bras Mat1983，14，2： | 1 |
| 13 | On relative stability of function germs显示文摘 | PORTO P F S | 1983 | Bol Soc Brasil Math1983，14，2： | 1 |
| 14 | The thermal lens effects as a power-limiting device显示文摘 | PORTO S P S DAMEN P C | 1967 | Appl Phys Lett1967，10，1967： | 1 |
| 15 | The thermal lens effect as a power-limiting device 显示文摘 | R C C Leite S P S Porto T C Damen | 1967 | Appl Phys Letts1967，10，3： | 1 |
| 16 | Raman Effect in Zinc Oxide显示文摘 | Damen T C Porto S P S Tell B | 1966 | Physical Review1966，142，2： | 1 |
| 17 | First-Order Raman Effect in Wurtzite-Type Crystals显示文摘 | Arguello C A Rousseau D L Porto S P S | 1969 | Physical Review1969，181，3： | 1 |
| 18 | Raman effect in Zinc oxide显示文摘 | Damen T C Porto S P Tell B | 1966 | Physics Reviews B1966，142，2： | 1 |
| 19 | Relative finite determinacy and relative stability of function-germs显示文摘 | PORTO P F S LOIBELI G F | 1978 | Bol Soc Brasil Math1978，9，2： | 1 |
| 20 | Optical phonons of yttrium aluminum garnet 显示文摘 | Hurrell J P Porto S P Chang I F | 1968 | Physical Review1968，173，3： | 1 |
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