Theoretical study of projectile fragmentation in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">Sn</mml:mi><mml:mprescripts /><mml:none /><mml:mn>112</mml:mn></mml:mmultiscripts></mml:mrow><mml:mo>+</mml:mo><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">Sn</mml:mi><mml:mprescripts /><mml:none /><mml:mn>112</mml:mn></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><

Imal, H.; Ergun, A.; Buyukcizmeci, N.; Ogul, R.; Botvina, A. S.; Trautmann, W.

doi:10.1103/physrevc.91.034605

Cited by 23 publications

(13 citation statements)

References 42 publications

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“…6 (a) The fragments with atomic numbers Z > 10 in the 1A GeV 112,124 Sn + 112,124 Sn reactions have also been measured at FRS at GSI by Föhr et al [61]. The cross sections of the fragments in these reactions have been studied in theories, such as the statistical multifragmentation model (SMM) [62], and the EPAX3 parametrizations [63]. The temperatures of the fragments have been analyzed by using the isobaric ratio methods [34].…”

Section: A ∆B and ∆Lnr Distributionsmentioning

confidence: 99%

Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference

Ding

Qiao

et al. 2015

Phys. Rev. C

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Background: Temperature is an important parameter in studying many important questions in heavy-ion collisions. A thermometer based on the isobaric yield ratio (IYR) has been proposed [Ma et al., Phys. Rev. C 86, 054611 (2012) and Ma et al., ibid., Phys. Rev. C 88, 014609 (2013)].Purpose: An improved thermometer (TIB) is proposed based on the difference between IYRs. TIB obtained from isobars in different reactions will be compared.Methods: The yields of three isobars are employed in TIB. The residual free energy of the three isobars are replaced by that of the binding energy. No secondary decay modification for odd A fragment is used in TIB. Results:The measured fragment yields in the 140A MeV 40,48 Ca + 9 Be ( 181 Ta) and 58,64 Ni + 9 Be ( 181 Ta), the 1A GeV 124,136 Xe + Pb, and the 112,124 Sn + 112,124 Sn reactions have been analyzed to obtain TIB from IMFs. TIB from most of the fragments in the 40,48 Ca and 58,64 Ni reactions is in the range of 0.6 MeV < TIB < 3.5 MeV. TIB from most of the fragments in the 124 Xe and 112,124 Sn reactions is in the range of 0.5 MeV < TIB < 2.5 MeV, while the range is 0.5 MeV < TIB < 4 MeV from most of the fragments in the 136 Xe reaction. In general, for most of the fragments TIB in the 40,48 Ca and 58,64 Ni reactions are very similar (except in the very neutron-rich fragments), and TIB from IMFs in the 124,136 Xe and 112,124 Sn reactions is also similar. A slightly dependence of TIB on A is found.Conclusions: Using the binding energy of the nucleus, TIB can be obtained without the knowledge of the free energies of fragments. In the investigated reactions, TIB from most of the IMFs is low.

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Section: A ∆B and ∆Lnr Distributionsmentioning

confidence: 99%

Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference

Ding

Qiao

et al. 2015

Phys. Rev. C

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“…Therefore, one may need additional approximations assumed to be combined with the SMM, such as stochastic nucleon transfer models, which may offer a good description of the transfer reactions near the Coulomb barrier. On the other hand, in our recent analyses we investigated the effect of the neutron richness of target nuclei on the projectile fragments and found that there was not a considerable influence of targets in projectile fragmentation reactions at relativistic [14,15,33], and Fermi energies [29][30][31]. However, in the present analysis we have noticed that the significant effect of the target on the neutron richness of the produced isotopes near Coulomb barriers should be taken into account.…”

Section: Discussionmentioning

confidence: 52%

“…At higher energies, the fragment characteristics are described according to the statistical and other existing models [18][19][20][21]. The predicted results obtained in these models have been seen to be consistent with the experimental data [14][15][16][17][18][19][20]. In the simulation of the reaction processes, one generally describes an intermediate excited nucleus formation in the first stage, and in the second stage, a secondary excitation process (deexcitation) of excited sources is simulated with an evaporation code.…”

Section: Statistical Modelmentioning

confidence: 56%

Isotopic distribution in projectile fragments above the Coulomb barrier

Kaya¹,

Buyukcizmeci²,

Ogul³

2018

Turk J Phys

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We have studied fragmentation properties of projectiles in peripheral heavy-ion collisions within a statistical ensemble approach. Distributions of projectile fragments are calculated for the reaction systems 86 Kr on 58,64 Ni and are compared to the experimental data for the same reactions at projectile energy of 15 MeV/nucleon. We assume that the projectile nuclei capture many neutrons from the targets as a result of the multinucleon transfer reactions (direct and fast reactions) at the first step of the dynamical stage of the collisions, and then the excited spectators are formed during the preequilibrium process (multistep reactions) long before the statistical equilibrium stage, and the deexcitation processes for the hot sources are simulated within the statistical multifragmentation model. It is seen that predicted results are in satisfactory agreement with experimental data.

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“…In this work we consider the generalization of the evaporation developed in Refs. [18,30,[33][34][35], and extend it for hyper matter. For excited hyper-nuclei the modification of the standard evaporation scheme is the following: Besides emission of normal light particles (nucleons, d, t, α, and others up to oxygen) in ground and particlestable excited states [30], we take into account the emission of strange particles (Λ-hyperon, 3 Λ H, 4 Λ H, 4 Λ He, 5 Λ He, and 6 Λ He).…”

Section: B Sequential Decay Models: Evaporation and Fissionmentioning

confidence: 94%

Formation of hypernuclei in evaporation and fission processes

et al. 2016

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There are excellent opportunities to produce excited heavy hyper residues in relativistic hadron and peripheral heavy-ion collisions. We investigate the disintegration of such residues into hyper nuclei via evaporation of baryons and light clusters and their fission. Previously these processes were well known for normal nuclei as the decay channels at low excitation energies. We have generalized these models for the case of hyper-matter. In this way we make extension of nuclear reaction studies at low temperature into the strange sector. We demonstrate how the new decay channels can be integrated in the whole disintegration process. Their importance for mass and isotope distributions of produced hyper-fragments is emphasized. New and exotic isotopes obtained within these processes may provide a unique opportunity for investigating hyperon interaction in nuclear matter.Comment: 32 pages, 13 figures, accepted to Phys. Rev.

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Theoretical study of projectile fragmentation in theSn112+Sn112and<

Cited by 23 publications

References 42 publications

Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference

Improved thermometer for intermediate-mass fragments in heavy-ion collisions with isobaric yield ratio difference

Isotopic distribution in projectile fragments above the Coulomb barrier

Formation of hypernuclei in evaporation and fission processes

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