Statistics and Nuclear Reactions

Weisskopf, Victor F.

doi:10.1103/physrev.52.295

Cited by 1,069 publications

(502 citation statements)

References 6 publications

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“…These rates are either those which are given by the Weisskopf theory [13] or those given by the approach of Swiatecki [14]. In the first case the rates are essentially determined as the ratio of the energy level densities of the initial and final fragments.…”

Section: Multisequential Decay Modelmentioning

confidence: 99%

Properties of projectile-fragments in the 40Ar+27Al reaction at 44 A MeV. Comparison with a multisequential decay model

et al. 2006

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Results on projectile fragment-fragment coincidences in the forward direction and for the reaction 40 Ar+ 27 Al at 44 A.MeV are presented and compared with the predictions of two different entrance channel models, a two-body and a three-body mechanism both followed by a binary multisequential decay including fission. This analysis shows that many features of the projectile decay products are well accounted for by the binary multisequential decay model. However the results depend critically upon the initial masses and excitation energies of the primary projectile fragments. In this respect, the three-body approach underestimates the excitation energy imparted to the primary fragments whereas the two-body scenario overestimates it. The present data put strong constraints on the initial excitation energy imparted to the primary fragments which appears to be intermediate between the predictions of the two models.

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Section: Multisequential Decay Modelmentioning

confidence: 99%

Properties of projectile-fragments in the 40Ar+27Al reaction at 44 A MeV. Comparison with a multisequential decay model

et al. 2006

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“…To examine the main features of Coulomb proximity decay, we have constructed a model in which the PLS with mass number A and charge Z, characterized by a spin and excitation (E * ), moves away from TLS with velocity V . At a given separation distance the de-excitation of PLS via sequential binary decay of light particles (n, Z ≤2) and heavy clusters (up to 18 O) is calculated using a Weisskopf approach [5]. In this model [9], the decay width for the emission of a particle j in the excited state i from a nucleus with (A, Z) is given by:…”

Section: Theoretical Interpretationmentioning

confidence: 99%

The decay time scale for highly excited nuclei as seen from asymmetrical emission of particles

Jändel

Botvina

Yennello

et al. 2004

J. Phys. G: Nucl. Part. Phys.

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A novel method was developed for the extraction of short emission times of light particles from the projectile-like fragments in peripheral deep-inelastic collisions in the Fermi energy domain. We have taken an advantage of the fact that in the external Coulomb field particles are evaporated asymmetrically. It was possible to determine the emission times in the interval 50-500 fm/c using the backward emission anisotropy of α-particles relative to the largest residue, in the reaction 28 Si + 112 Sn at 50 MeV/nucleon. The extracted times are consistent with predictions based on the evaporation decay widths calculated with the statistical evaporation model generalized for the case of the Coulomb interaction with the target.

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“…Once the freeze-out volume is reached there is no exchange of matter between different fragments. Since the fragments are still hot, they will get rid of their excitation by evaporation (sequential two body decays [7,8]) before they reach the detector. The freeze-out density is significantly lower than the normal density.…”

Section: Liquid Gas Phase Transition In Nuclear Mean-field Theorymentioning

confidence: 99%

“…Later, disassembly of a collection of nucleons which start with initial temperature and density of interest in this article, and interact via this potential was considered by other groups [161][162][163][164]. Pratt et al [165] used a truncated (8,4) potential to study similar dissociation. It has not been demonstrated that such simulations apply to nuclear cases very well since actual nuclear data for specific cases have not been compared.…”

Section: Dynamical Models For Fragmentationmentioning

confidence: 99%

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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Statistics and Nuclear Reactions

Cited by 1,069 publications

References 6 publications

Properties of projectile-fragments in the 40Ar+27Al reaction at 44 A MeV. Comparison with a multisequential decay model

Properties of projectile-fragments in the 40Ar+27Al reaction at 44 A MeV. Comparison with a multisequential decay model

The decay time scale for highly excited nuclei as seen from asymmetrical emission of particles

Liquid-Gas Phase Transition in Nuclear Multifragmentation

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