Experimental Determination of In-Medium Cluster Binding Energies and Mott Points in Nuclear Matter

Hagel, K.; Wada, Ryoichi; Qin, Lei; Natowitz, J. B.; Shlomo, S.; Bonasera, A.; Röpke, G.; Typel, S.; Chen, Z.; Huang, M.; Wang, J.; Zheng, H.; Kowalski, S.; Bottosso, C.; Barbui, M.; Rodrigues, M. R. D.; Schmidt, K.; Fabris, D.; Lunardon, M.; Moretto, S.; Nebbia, G.; Pesente, S.; Rizzi, V.; Viesti, G.; Cinausero, M.; Prete, G.; Keutgen, T.; Masri, Y. El; Majka, Z.

doi:10.1103/physrevlett.108.062702

Cited by 50 publications

(48 citation statements)

References 36 publications

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“…The symmetry energy of low-density warm nuclear matter predicted by this model seems to be in good agreement with the experimental data [29]. In a recent experiment [30], it is claimed that the binding energies of very light clusters (A 4) produced in multifragmentation progressively tend to zero in the temperature range of T ∼ 5-10 MeV even at a very low in-medium density ∼ 0.05ρ 0 .…”

Section: Introductionsupporting

confidence: 84%

Effects of medium on nuclear properties in multifragmentation

Samaddar

Viñas

et al. 2012

Phys. Rev. C

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In multifragmentation of hot nuclear matter, properties of fragments embedded in a soup of nucleonic gas and other fragments should be modified as compared with isolated nuclei. Such modifications are studied within a simple model where only nucleons and one kind of heavy nuclei are considered. The interaction between different species is described with a momentum-dependent two-body potential whose parameters are fitted to reproduce properties of cold isolated nuclei. The internal energy of heavy fragments is parametrized according to a liquid-drop model with density-and temperature-dependent parameters. Calculations are carried out for several subnuclear densities and moderate temperatures, for isospin-symmetric and asymmetric systems. We find that the fragments get stretched due to interactions with the medium and their binding energies decrease with increasing temperature and density of nuclear matter.

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Section: Introductionsupporting

confidence: 84%

Effects of medium on nuclear properties in multifragmentation

Samaddar

Viñas

et al. 2012

Phys. Rev. C

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“…They speculated that at the vicinity of an energy threshold for cluster separation, the nucleus tends to expand its size and favor the cluster formation in consequence [8,9]. As a matter of fact, the increasing binding (tightness) of the cluster with the decreasing environmental matter density has been experimentally justified recently in heavy-ion collisions [10]. Owing to the worldwide development of radioactive ion beam facilities and relevant detection techniques, studies on the cluster structure have been extended to unstable nuclei [5,11,12].…”

Section: Introductionmentioning

confidence: 97%

Helium-helium clustering states inBe12

Yang¹,

Ye²,

Li³

et al. 2015

Phys. Rev. C

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An inelastic excitation experiment was performed with a 12 Be beam at 29 MeV/u on a carbon target. New resonances close to the respective cluster separation thresholds were observed in 12 Be for the 4 He + 8 He and 6 He + 6 He decay channels, confirming the previously proposed molecular rotational bands. Using the model-independent angular correlation analysis, a 0 + spin parity is assigned to the remarkably large peak at 10.3 MeV in the 4 He + 8 He channel. A distorted wave Born approximation (DWBA) calculation was compared to the experimental differential cross section of this state, resulting in a largely enhanced monopole transition matrix element of 7.0 ± 1.0 fm 2 , in good agreement with the generalized two-center cluster model (GTCM) prediction assuming a preformed α-4n-α configuration. Together with the previously reported large cluster spectroscopic factor, the strong clustering in 12 Be is well demonstrated. The detection focused on the most forward angles, by using a zero-deg telescope, is essential in the present measurement.

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“…The thermodynamic conditions are similar to those in the neutrinosphere of CCSNe . From the observed yields of nucleons and clusters, it was possible to extract the in-medium binding energies and Mott points of light clusters (Hagel et al, 2012) with the help of chemical equilibrium constants (Qin et al, 2012). Hempel et al (2015) refined the study of Qin et al (2012), taking into account the differences between matter in HIC and CCSNe.…”

Section: Heavy-ion Collisionsmentioning

confidence: 99%

Equations of state for supernovae and compact stars

et al. 2017

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A review is given of various theoretical approaches for the equation of state (EoS) of dense matter, relevant for the description of core-collapse supernovae, compact stars, and compact star mergers. The emphasis is put on models that are applicable to all of these scenarios. Such EoS models have to cover large ranges in baryon number density, temperature, and isospin asymmetry. The characteristics of matter change dramatically within these ranges, from a mixture of nucleons, nuclei, and electrons to uniform, strongly interacting matter containing nucleons, and possibly other particles such as hyperons or quarks. As the development of an EoS requires joint efforts from many directions, different theoretical approaches are considered and relevant experimental and observational constraints which provide insights for future research are discussed. Finally, results from applications of the discussed EoS models are summarized.

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Experimental Determination of In-Medium Cluster Binding Energies and Mott Points in Nuclear Matter

Cited by 50 publications

References 36 publications

Effects of medium on nuclear properties in multifragmentation

Effects of medium on nuclear properties in multifragmentation

Helium-helium clustering states inBe12

Equations of state for supernovae and compact stars

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