Nonstatistical fluctuations for deep inelastic processes in {sup 27}Al+{sup 27}Al collisions
- National Institute of Physics and Nuclear Engineering, P.O. Box MG-6, H-76900 Bucharest (Romania)
- Istituto Nazionale di Fisica Nucleare, Laboratorio Nazionale del Sud, v. S. Sofia 44, I-95100, Catania (Italy)
- Istituto Nazionale di Fisica Nucleare, Sezione di Bari, v. Amendola 173, I-70126 Bari (Italy)
- Istituto Nazionale di Fisica Nucleare and Dipartimento di Fisica, I-95129 Catania (Italy)
The excitation functions (EFs) for different fragments produced in the {sup 27}Al+{sup 27}Al dissipative collisions have been measured in steps of 250 keV in the incident energy range 122-132 MeV. Deep inelastic processes have been selected by integrating events on a total kinetic energy loss window of 12 MeV between 20 and 32 MeV. Large fluctuations are observed in all the studied EFs. Large-channel cross-correlation coefficients confirm the nonstatistical origin of these fluctuations. The energy autocorrelation function (EAF) shows damped oscillation structure as expected when a dinuclear system with a lifetime [{tau}=(5.1{+-}2.1){center_dot}10{sup -21}s], similar with its revolution period (T=4.9{center_dot}10{sup -21}sec), is formed. From the periodicity of the EAF oscillations, information on the deformation of the {sup 27}Al+{sup 27}Al dinucleus is inferred.
- OSTI ID:
- 20863724
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 74, Issue 2; Other Information: DOI: 10.1103/PhysRevC.74.024601; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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