Study of the excitation function fluctuations of the dissipative28Si+48Ti binary collision in the incident energy interval from 206.9 MeV to 213.8 MeV

Rizzo, F.; Cardella, G.; Rosa, A. De; Pietro, A. Di; D’Onofrio, Antonio; Fioretto, E.; Inglima, G.; Musumarra, A.; Papa, M.; Pappalardo, G. S.; Romoli, M.; Terrasi, F.; Sandoli, M.; Wang, G. S.

doi:10.1007/bf01291176

Cited by 23 publications

(3 citation statements)

References 14 publications

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“…In this Section we compare the experimental results with the model approach developed by Kun [22] and with a model calculation based on constructing virtual states in a potential well [23].…”

Section: Comparison With Model Approachesmentioning

confidence: 99%

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Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Vannucci

Abbondanno

Bettiolo

et al. 1996

Z. Physik A — Hadrons and Nuclei

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Excitation functions and angular distributions of 58 Ni+ 58 Ni and 58 Ni+ 62 Ni scattering at energies just above the Coulomb barrier have been measured around θ cm = 90 • in energy steps ∆E cm = 0.25 MeV from E cm 110 MeV to E cm 120 MeV for 58 Ni+ 58 Ni and from E cm 110 MeV to E cm 118 MeV for 58 Ni+ 62 Ni. Evidence for structure of non-statistical character has been found in the angle-summed excitation functions; this evidence is corroborated by the analysis of the angular distributions. This is the first time that non-statistical structure in elastic and inelastic scattering is reported with high confidence level for this mass and excitation energy ranges. Attempts are presented to understand the nature of this structure, including the presence of intermediate dinuclear states and virtual states in a potential well.

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Section: Comparison With Model Approachesmentioning

confidence: 99%

“…Ref. 23 shows that the partial overlapping of levels having a common rotational character produces angular distributions with focusing effects typical of the deep inelastic dissipative phenomena, instead of the [P L (cos θ)] 2 shapes expected in the zero-spin channel.…”

Section: The Intermediate Dinuclear System Approachmentioning

confidence: 99%

Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Vannucci

Abbondanno

Bettiolo

et al. 1996

Z. Physik A — Hadrons and Nuclei

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“…Despite the expectation that the contribution of a large number of microchannels to the measured cross section should attenuate the fluctuation amplitude in the EF of the dissipative heavy-ion collisions (DHIC), the fluctuations have been observed and analyzed in EFs for other lightand medium-mass systems: 19 F+ 89 Y [6], 28 Si+ 48 Ti [7,8], 19 F+ 63 Cu [9], 28 Si+ 28 Si [10], 19 F+ 51 V [11]. An explanation of the persistence of the fluctuations in the EFs of DHIC is given in the framework of the partial overlapping molecular level model (POMLM) introducing, in addition to the partial coherence, the hypothesis that the DNS is excited in the low-density region of molecular levels [12,13].…”

Section: Introductionmentioning

confidence: 98%

Nonstatistical fluctuations for deep inelastic processes inAl27+Al27
Berceanu
¹
,
Dūma
²
,
Moisă
³

et al. 2006
Phys. Rev. C
1
0
2
0
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The excitation functions (EFs) for different fragments produced in the 27 Al+ 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 [τ = (5.1 ± 2.1) · 10 −21 s], similar with its revolution period (T = 4.9 · 10 −21 sec), is formed. From the periodicity of the EAF oscillations, information on the deformation of the 27 Al+ 27 Al dinucleus is inferred.

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Highly excited “nuclear molecules”: A way to explain the fluctuations in DBHIC excitation functions. Study of the28Si +28Si colliding system at 5.3 MeV ·A

Papa

Cardella

Pietro

et al. 1995

Z. Physik A - Hadrons and Nuclei

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Abstract. The properties of the strong fluctuations observed in the excitation functions of Dissipative Binary Heavy Ion Collisions (DBHIC) have been studied for the system 2Ssi+ 28 Si in the energy range 150MeV < El~b _< 156MeV with 150keV step laboratory incident energy, by angular distributions and excitation functions measurements. Experimental results are compared to the the recently developed Partially Overlapping Molecular Level Model (POMLM). The parameters of the model have been determined with reasonable accuracy by describing all the quantities characterizing the fluctuations in the excitation functions i.e.: Average Angular Distributions, Energy Autocorrelation Functions, Variances, Angular Correlation Coefficients. The results of the analysis strongly support the idea of a process proceeding through the formation of an highly excited "nuclear molecule". Experimental data collected at the most forward angles show the effects of strong excitation of a few final channels.

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Study of the excitation function fluctuations of the dissipative28Si+48Ti binary collision in the incident energy interval from 206.9 MeV to 213.8 MeV

Cited by 23 publications

References 14 publications

Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Nonstatistical fluctuations for deep inelastic processes inAl27+Al27
Berceanu
¹
,
Dūma
²
,
Moisă
³

et al. 2006
Phys. Rev. C
1
0
2
0
View full text Add to dashboard Cite

Highly excited “nuclear molecules”: A way to explain the fluctuations in DBHIC excitation functions. Study of the28Si +28Si colliding system at 5.3 MeV ·A

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Study of the excitation function fluctuations of the dissipative28Si+48Ti binary collision in the incident energy interval from 206.9 MeV to 213.8 MeV

Cited by 23 publications

References 14 publications

Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Evidence of non-statistical structures in the elastic and inelastic scattering of58Ni+58Ni and58Ni+62Ni and intermediate dinuclear states

Nonstatistical fluctuations for deep inelastic processes inAl27+Al27Berceanu1, Dūma2, Moisă3 et al. 2006Phys. Rev. C1020View full textAdd to dashboardCite

Highly excited “nuclear molecules”: A way to explain the fluctuations in DBHIC excitation functions. Study of the28Si +28Si colliding system at 5.3 MeV ·A

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Nonstatistical fluctuations for deep inelastic processes inAl27+Al27
Berceanu
¹
,
Dūma
²
,
Moisă
³

et al. 2006
Phys. Rev. C
1
0
2
0
View full text Add to dashboard Cite