Multifragment Source Lifetime in Intermediate Energy Heavy Ion Collisions PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 4
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 4
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Author: Amand Faessler
Publisher:
ISBN:
Category : Elastic scattering
Languages : en
Pages : 448
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The system 200 MeV/nucleon Au + Au was studied, giving full azimuthal coverage for intermediate mass fragments in the forward hemisphere in the center of mass system while measuring all the light particles in each event. The complete measurement of light particles (p, d, t, 3He, 4He) allows determination of the charge multiplicity of participant baryons, which increases as the impact parameter between the projectile and target nuclei gets smaller. This quantity was used to sort the events into groups according to impact parameter. It is found that peripheral collisions give rise to fragments with rapidities very close to the beam rapidity. It is also observed that the transition between the peripheral and central collisions is very smooth, with a gradual shift in the rapidities of the observed fragments away from the projectile rapidity. The total intermediate mass fragment multiplicity is found to increase with increasing participant baryon charge multiplicity. 7 refs., 2 figs. (LEW).
Author: Sanjeev Kumar
Publisher: LAP Lambert Academic Publishing
ISBN: 9783659233944
Category :
Languages : en
Pages : 224
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Book Description
This text book deals with many issues of nuclear reactions in contest with the heavy-ion collisions at intermediate energies. The main issues discussed in the book are Multifragmentation, elliptical flow, nuclear stopping and symmetry energy. These phenomenas can be compared with the happenings in the universe such as Supernova Explosion, Quark Gluon Plasma, Liquid Gas Phase transition, which were the basic processes at the time of expansion of the universe. Ultimately, the study of these phenomenas has made this book highly important and interesting for the researchers as well as master students working in the field of intermediate energies. In addition to this, the determination of symmetry energy for asymmetric nuclear matter, which is the burning topic in the present day research, is also explored in the present version of the book. In conclusion, the matter published in the book will give the readers the detailed analysis of the nature of the hadronic matter, which is the ultimate goal of all the theoretical as well as experimental nuclear physics collaborations throughout the world.
Author:
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ISBN:
Category : Power resources
Languages : en
Pages : 444
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Author: Amand Faessler
Publisher: Elsevier
ISBN: 1483103153
Category : Science
Languages : en
Pages : 438
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Neutrinos in Cosmology, Astro, Particle and Nuclear Physics
Author: Bernd Heide
Publisher:
ISBN:
Category :
Languages : de
Pages : 29
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Author: Roberta Ghetti
Publisher:
ISBN: 9789163018138
Category :
Languages : en
Pages : 19
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Author: James Francis Dempsey
Publisher:
ISBN:
Category :
Languages : en
Pages : 228
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Author:
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ISBN:
Category :
Languages : en
Pages : 247
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Book Description
The 129Xe-induced reactions on {sup nat}Cu, 89Y, 165Ho, and 197Au at bombarding energies of E/A = 40 & 60 MeV have been studied theoretically and experimentally in order to establish the underlying mechanism of multifragmentation at intermediate energy heavy-Ion collisions. Nuclear disks formed in central heavy-ion collisions, as simulated by means of Boltzmann-like kinetic equations, break up into several fragments due to a new kind of Rayleigh-like surface instability. A sheet of liquid, stable in the limit of non-interacting surfaces, is shown to become unstable due to surface-surface interactions. The onset of this instability is determined analytically. A thin bubble behaves like a sheet and is susceptible to the surface instability through the crispation mode. The Coulomb effects associated with the depletion of charges in the central cavity of nuclear bubbles are investigated. The onset of Coulomb instability is demonstrated for perturbations of the radial mode. Experimental intermediate-mass-fragment multiplicity distributions for the 129Xe-induced reactions are shown to be binomial at each transverse energy. From these distributions, independent of the specific target, an elementary binary decay probability p can be extracted that has a thermal dependence. Thus it is inferred that multifragmentation is reducible to a combination of nearly independent emission processes. If sequential decay is assumed, the increase of p with transverse energy implies a contraction of the emission time scale. The sensitivity of p to the lower Z threshold in the definition of intermediate-mass-fragments points to a physical Poisson simulations of the particle multiplicities show that the weak auto-correlation between the fragment multiplicity and the transverse energy does not distort a Poisson distribution into a binomial distribution. The effect of device efficiency on the experimental results has also been studied.
