Many-body cascade calculation for photonuclear reactions

Gonçalves, Marco Antônio; Pina, S. de; Lima, D. A. De; Milomen, W.; Medeiros, E. L.; Duarte, S. B.

doi:10.1016/s0370-2693(97)00662-x

Cited by 51 publications

(70 citation statements)

References 17 publications

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“…Both intranuclear cascade and evaporation/fission calculations with the CRISP model have been extensively investigated yielding good results for reactions induced by photons, electrons and protons and observables such as neutron or proton multiplicity, fission and spallation cross sections, and fragment mass distributions [14,16,17,[22][23][24][25][26][27].…”

Section: Modelmentioning

confidence: 99%

Evidence of subnucleonic degrees of freedom inJ/ψphotoproduction in ultraperipheral collisions at energies available at the CERN Large Hadron Collider

et al. 2015

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We present calculations for the incoherent photoproduction of J/ψ vector mesons in ultraperipheral heavy ion collisions (UPC) in terms of hadronic interactions. This study was carried out using the recently developed Monte Carlo model CRISP extended to include UPCs at LHC energies. A careful study of re-scattering and destruction of the J/ψ particles is presented for PbPb collisions at √ sNN = 2.76 TeV. We have also compared our method to AuAu collisions at √ sNN = 200 GeV measured at RHIC.PACS numbers: 24.10.Lx, 25.20.Lj, 25.90.+k

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Section: Modelmentioning

confidence: 99%

Evidence of subnucleonic degrees of freedom inJ/ψphotoproduction in ultraperipheral collisions at energies available at the CERN Large Hadron Collider

et al. 2015

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“…During the time span of the binary scatterings, the remaining particles are supposed not to interact and the collisional term between the interacting particles inside the nuclear matter is approximated by the same quantity predicted for the vacuum. The basic concepts of the present calculation were first developed to study high-energy photonuclear reactions [3][4][5][6]. Although these versions have presented satisfactory results, they also had some inherent limitations related with the stochastic treatment of the Pauli-blocking mechanism and the incorporation of ambiguous quantities, such as stopping time parameters to determine the pre-equilibrium stage.…”

Section: A the Multicollisional Intranuclear Cascade Modelmentioning

confidence: 99%

“…This version was dedicated to the quasideuteron entrance channel and incorporates important improvements, most of them related with a nonstochastic treatment for the Pauli-blocking mechanism, in comparison with previous approaches [3][4][5][6]. Neutron multiplicities and the total photoabsorption cross sections for Sn, Ce, Ta, and Pb were consistently described using the MCMC model to describe the rapid stage of the nuclear reaction plus an evaporation Monte Carlo routine, based on the Weisskopf statistical theory, to address the de-excitation of the compound nucleus (CN) in terms of the competition between particle evaporation and nuclear fission.…”

Section: Introductionmentioning

confidence: 99%

Photon-induced multiple particle emissions ofZr90andnatZr from 10 to 140 MeV

et al. 2007

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A comprehensive analysis of electrodisintegration yields of protons on 90 Zr is proposed taking into account the giant dipole resonance, isovector giant quadrupole resonance (IVGQR), and quasideuteron contributions to the total photoabsorption cross section from 10 to 140 MeV. The calculation applies the MCMC intranuclear cascade to address the direct and pre-equilibrium emissions and another Monte Carlo-based algorithm to describe the evaporation step. The final results of the total photoabsorption cross section for 90 Zr and relevant decay channels are obtained by fitting the (e, p) measurements from the National Bureau of Standards and show that multiple proton emissions dominate the photonuclear reactions at higher energies. These results provide a consistent explanation for the exotic and steady increase of the (e, p) yield and also a strong evidence of a IVGQR with a strength parameter compatible with the E2 energy-weighted sum rule. The inclusive photoneutron cross sections for 90 Zr and nat Zr, derived from these results and normalized with the (e, p) data, are in agreement within 10% with both Livermore and Saclay data up to 140 MeV.

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“…CRISP is a Monte Carlo code for simulating nuclear reactions [20] that uses a two step process. First, an intranuclear cascade is simulated following a time-ordered sequence of collisions in a many-body system [21,22], and when the intranuclear cascade is finished the evaporation of nucleons and alpha-particles starts in competition with fission [23].…”

Section: Introductionmentioning

confidence: 99%

“…In the simulation, reactions can be initiated by intermediate and high energy protons [22] or photons [24][25][26]. It has been extended to energies up to 3.5 GeV [27], and it was shown that the CRISP code can give good results for total photonuclear absorption cross sections from approximately 50 MeV, where the quasi-deuteron absorption mechanism is dominant, up to 3.5 GeV, where the socalled photon-hadronization mechanism is dominant, leading to a shadowing effect in the cross section [27].…”

Section: Introductionmentioning

confidence: 99%

Effects of fissioning nuclei distributions on fragment mass distributions for high energy fission

Andrade-II

Menezes

Duarte

et al. 2012

EPJ Web of Conferences

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Abstract.We study the effects of fissioning nuclei mass-and energy-distributions on the formation of fragments for fission induced by high energy probes. A Monte Carlo code called CRISP was used for obtaining mass distributions and spectra of the fissioning nuclei for reactions induced by 660 MeV protons on 241 Am and on 239 Np, by 500 MeV protons on 208 Pb, and by Bremsstrahlung photons with end-point energies at 50 MeV and 3500 MeV on 238 U. The results show that even at high excitation energies, asymmetric fission may still contribute significantly to the fission cross section of actinide nuclei, while it is the dominante mode in the case of lead. However, more precise data for high energy fission on actinide are necessary in order to allow definite conclusions.

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Many-body cascade calculation for photonuclear reactions

Cited by 51 publications

References 17 publications

Evidence of subnucleonic degrees of freedom inJ/ψphotoproduction in ultraperipheral collisions at energies available at the CERN Large Hadron Collider

Evidence of subnucleonic degrees of freedom inJ/ψphotoproduction in ultraperipheral collisions at energies available at the CERN Large Hadron Collider

Photon-induced multiple particle emissions ofZr90andnatZr from 10 to 140 MeV

Effects of fissioning nuclei distributions on fragment mass distributions for high energy fission

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