Mechanisms of very heavy-ion collisions: The 209Bi + 136Xe reaction at ELab = 1130 MeV

Schröder, W. U.; Birkelund, J.R.; Huizenga, J.R.; Wolf, K.L.; Viola, V. E.

doi:10.1016/0370-1573(78)90110-2

Cited by 101 publications

(28 citation statements)

References 34 publications

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“…The result is a global distribution d O-to]dTKE indicating how much reaction cross section is associated with a certain degree of "inelasticity" of the collision. If, according to [23], the widely-used assumption is made that the total kinetic energy is a monotonically decreasing function of the impact parameter b (and therefore of the entrance ~-wave), then the mean experimental correlation between b and TKE can be deduced; one just integrates simultaneously do-tot/dTKE and the theoretical d~rtot/db starting from the known point TKE(bg0= E .... . As an example, Fig.…”

Section: Cross Sectionsmentioning

confidence: 99%

Results on two-, three-, and four-body events from the100Mo+100Mo and120Sn+120Sn collisions aroundE/A=20 MeV

Charity¹,

Freifelder²,

Gobbi³

et al. 1991

Z. Physik A - Hadrons and Nuclei

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Events with 2, 3 and 4 heavy-fragments (A>20) have been detected in the reactions l~176 l~176 at E/A = 18.7, 23.7 MeV and 12~ t2~ at E/A= 18.4 MeV.The experiments were performed with an array of 12 detectors which together covered a large fraction of the forward hemisphere and allowed a high detection efficiency for these events. Masses and energies of all fragments have been reconstructed by means of an improved version of the kinematic coincidence method. The probabilities P~ and P4 of producing 3-and 4-body events were found to depend mainly on the dissipated energy rather than on the bombarding energy, thus indicating that their origin lies more in the decay properties of the excited fragments than in the dynamics of the interaction. Emission of light particles from the composite system is shown to become more relevant with increasing bombarding energy and may explain the drop of the P3 and P4 curves at high energy losses. Small deviations of the P3 and P4 curves at 23.7 A. MeV from those at lower bombarding energies were used to estimate the amount of a possible pre-equilibrium light particle emission as a function of impact parameter.

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Section: Cross Sectionsmentioning

confidence: 99%

Results on two-, three-, and four-body events from the100Mo+100Mo and120Sn+120Sn collisions aroundE/A=20 MeV

Charity¹,

Freifelder²,

Gobbi³

et al. 1991

Z. Physik A - Hadrons and Nuclei

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“…To determine the impact parameter b from the impact parameter measures -the multiplicity of charged light particles Mtp and Zboun d -we adopted a geometric cross section method first used in [14]. At relativistic energies the total nucleus-nucleus cross section can be well approximated by the geometrical cross section, and the cross section as a function of the imp~ict parameter is proportional to the square of b.…”

Section: Reconstruction Of the Impact Parametermentioning

confidence: 99%

Fragmentation of gold projectiles: From evaporation to total disassembly

Hubele

Kreutz

Adloff³

et al. 1991

Z. Physik A - Hadrons and Nuclei

163

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We have studied the fragmentation of Au projectiles interacting with targets of C, A1 and Cu at an incident energy of E/A = 600 MeV. The employed inverse kinematics allowed a nearly complete detection of projectile fragments with charge Z > 2. The recorded fragmentation events were sorted according to three observables, the multiplicity Mtp of light charged particles, the largest atomic number Zma x within an event, and a new observable, Zbound, representing the sum of the atomic numbers Z of all fragments with Z>__ 2. Using these observables, the impact parameter dependence of the fragmentation process was investigated. For all three targets, a maximum mean multiplicity of 3 to 4 intermediate mass fragments (IMFs) is observed. The corresponding impact parameters range from central collisions for the C target to increasingly peripheral collisions for the heavier targets. It is found that the correlation between the IMF multiplicity and Zbouna, extending from evaporation type processes (large Zbouna) to the total disassembly of the projectile (small Zbound) , is independent of the target nucleus. This universal behaviour may suggest an -at least partial -equilibration of the projectile fragment prior to its decay.

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“…[6] and based on a refinement of an even older recipe [44]. The basic hypothesis is that there is a good average correlation between decreasing impact parameter and macroscopic behavior of the reaction products in terms of scattering angle and kinetic energy dissipation.…”

Section: Appendix A: Impact Parameter Estimationmentioning

confidence: 99%

Particle and light fragment emission in peripheral heavy ion collisions at Fermi energies

et al. 2006

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This last component appears to be compatible with an evaporation from an equilibrated source at normal density, as described by the statistical code Gemini at the appropriate excitation energy. On the contrary, the midvelocity emission presents remarkable differences for what concerns both the dependence of the multiplicities on the energy deposited in the midvelocity region and the isotopic composition of the emitted light charged particles.

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Mechanisms of very heavy-ion collisions: The 209Bi + 136Xe reaction at ELab = 1130 MeV

Cited by 101 publications

References 34 publications

Results on two-, three-, and four-body events from the100Mo+100Mo and120Sn+120Sn collisions aroundE/A=20 MeV

Results on two-, three-, and four-body events from the100Mo+100Mo and120Sn+120Sn collisions aroundE/A=20 MeV

Fragmentation of gold projectiles: From evaporation to total disassembly

Particle and light fragment emission in peripheral heavy ion collisions at Fermi energies

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