Production and characterization of hot nuclei in the reactions of 19 and 35 MeV/u 14N with 145Sm

Hagel, K.; Fabris, D.; Gonthier, P.; Ho, H.; Lou, Y.; Majka, Z.; Mouchaty, G.; Namboodiri, M.N.; Natowitz, J. B.; Nebbia, G.; Schmitt, R.P.; Viesti, G.; Wada, R.; Wilkins, B.D.

doi:10.1016/0375-9474(88)90245-x

Cited by 101 publications

(74 citation statements)

References 26 publications

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“…For this source, the apparent temperatures for alpha emission are the highest. Such an effect has previously been noted and attributed to the relatively higher emission probabilities for alpha particles in the early stage of the evaporation cascade [16,17].…”

Section: Moving Source Analysismentioning

confidence: 87%

“…This is not surprising since the source fit can be expected to return only an apparent temperature reflecting the entire cooling stage of the TLF source. In our previous work [13,16,17], we have found that the slope parameters for the alpha particle emission from the TLF source most closely approximates the intial thermal temperature of this source, reflecting the higher fraction of the alpha emission in the earlier part of the de-excitation cascade. The alpha particle slope parameters are presented in column 5 of Table I.…”

Section: Comparison Of Thhe With T Slope From Source Fitsmentioning

confidence: 99%

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Tracing the evolution of temperature in near Fermi energy heavy ion collisions

et al. 2005

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The kinetic energy variation of emitted light clusters has been employed as a clock to explore the time evolution of the temperature for thermalizing composite systems produced in the reactions of 26A, 35A and 47A MeV 64 Zn with 58 Ni, 92 Mo and 197 Au. For each system investigated, the double isotope ratio temperature curve exhibits a high maximum apparent temperature, in the range of 10-25 MeV, at high ejectile velocity. These maximum values increase with increasing projectile energy and decrease with increasing target mass. The time at which the maximum in the temperature curve is reached ranges from 80 to 130 fm/c after contact. For each different target, the subsequent cooling curves for all three projectile energies are quite similar. Temperatures comparable to those of limiting temperature systematics are reached 30 to 40 fm/c after the times corresponding to the maxima, at a time when AMD-V transport model calculations predict entry into the final evaporative or fragmentation stage of de-excitation of the hot composite systems. Evidence for the establishment of thermal and chemical equilibrium is discussed.

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Section: Moving Source Analysismentioning

confidence: 87%

Section: Comparison Of Thhe With T Slope From Source Fitsmentioning

confidence: 99%

Tracing the evolution of temperature in near Fermi energy heavy ion collisions

et al. 2005

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“…In the sequel we mainly study two nuclei: [7,8,35]. On the other hand, two isotopes with quite different number of neutrons are taken in order to study the effect of proton-neutron asymmetry.…”

Section: Numerical Results For Finite Systemsmentioning

confidence: 99%

Relativistic Thomas–Fermi description of Sm isotopes at finite temperature

2002

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“…This is not surprising since these T HHe temperatures represent the temperature at the start of the de-excitation cascade while the TLF source fits to the alpha spectra can be expected to return only an apparent temperature reflecting the entire evaporation and cooling history of the TLF source. In previous work [20,26,27] we have found that the slope parameters for the alpha particle emission from the TLF source most closely approximates the intial thermal temperature of this source, reflecting the higher fraction of the alpha emission in the earlier part of the de-excitation cascade. The agreement between these thermal fit apparent temperatures and the late time chemical temperatures obtained from the isotope ratio temperatures, as presented in column 4 is quite reasonable given the associated uncertainties.…”

Section: Temperatures At the End Of Pre-equilibrium Emissionmentioning

confidence: 99%

Ghoshal-like test of equilibration in near-Fermi-energy heavy-ion collisions

Wang¹,

Keutgen²,

Wada³

et al. 2005

Phys. Rev. C

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Calorimetric and coalescence techniques have been employed to probe equilibration for hot nuclei produced in heavy ion collisions of 35 to 55 MeV/u projectiles with medium mass targets. Entrance channel mass asymmetries and energies were selected in order that very hot composite nuclei of similar mass and excitation would remain after early stage pre-equilibrium particle emission. Intercomparison of the properties and de-excitation patterns for these different systems provides evidence for the production of hot nuclei with decay patterns relatively independent of the specific entrance channel.

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Production and characterization of hot nuclei in the reactions of 19 and 35 MeV/u 14N with 145Sm

Cited by 101 publications

References 26 publications

Tracing the evolution of temperature in near Fermi energy heavy ion collisions

Tracing the evolution of temperature in near Fermi energy heavy ion collisions

Relativistic Thomas–Fermi description of Sm isotopes at finite temperature

Ghoshal-like test of equilibration in near-Fermi-energy heavy-ion collisions

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