Dynamic evolution and the caloric curve for medium mass nuclei

Cibor, J.; Wada, R.; Hagel, K.; Lunardon, M.; Marie, N.; Alfaro, R.; Shen, Wen; Xiao, Bo-Wen; Zhao, Yucheng; Li, J.; Li, B.A.; Murray, M.; Natowitz, J. B.; Majka, Z.; Staszel, P.

doi:10.1016/s0370-2693(99)01457-4

Cited by 38 publications

(54 citation statements)

References 28 publications

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“…For asymmetric collisions, such fits typically exhibit a PLF source dominance localized at high rapidity, an IV source dominance at midrapidity and TLF source emission localized at low rapidity [4,5,12,13,14]. In the present work, except for the most forward detector rings, the data are dominated by particles associated with the IV and TLF sources and a good reproduction of the observed spectra is achieved.…”

Section: Moving Source Analysismentioning

confidence: 51%

“…Thus the observed slope temperature values are affected by the relative emission probabilities over that time period. The IV source slope temperatures for p, d, t, 3 He and 4 He range from T ∼ 7 to 17 MeV for the different systems studied. The temperatures from the particles with A ≤ 3 are quite similar.…”

Section: Moving Source Analysismentioning

confidence: 98%

“…This correlation can be exploited to follow the time evolution of the system. We have previously used this correlation in coalescence model studies of several systems [4,5,11]. For the present systems, extensive calculations have been made employing the AMD-V model of Ono [19].…”

Section: Temperature Determinationsmentioning

confidence: 99%

“…In this way, we attempt to isolate the emission associated with the IV source which occurs during the thermalization stage of the reaction [4,5,11]. We have then made double isotope ratio temperature determinations as a function of ejectile velocity in the IV frame.…”

Section: Temperature Determinationsmentioning

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: 51%

Section: Moving Source Analysismentioning

confidence: 98%

Section: Temperature Determinationsmentioning

confidence: 99%

Section: Temperature Determinationsmentioning

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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“…As time increases, each of the temperature evolution curves rises to a maximum and then decreases. Maximum temperatures of [10][11][12][13][14][15] MeV are observed at times in the range of 95 to 110 fm/c. After that the temperatures drop monotonically.…”

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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Liquid-Gas Phase Transition in Nuclear Multifragmentation

Gupta

Mekjian

Tsang

2001

Advances in the Physics of Particles and Nuclei

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The equation of state of nuclear matter suggests that at suitable beam energies the disassembling hot system formed in heavy ion collisions will pass through a liquid-gas coexistence region. Searching for the signatures of the phase transition has been a very important focal point of experimental endeavours in heavy-ion collisions, in the last fifteen years. Simultaneously theoretical models have been developed to provide information about the equation of state and reaction mechanisms consistent with the experimental observables.

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Dynamic evolution and the caloric curve for medium mass nuclei

Cited by 38 publications

References 28 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

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

Liquid-Gas Phase Transition in Nuclear Multifragmentation

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