Multifragment Source Lifetime in Intermediate Energy Heavy Ion Collisions
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Published: 1992
Total Pages: 4
ISBN-13:
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Published: 1992
Total Pages: 4
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DOWNLOAD EBOOKAuthor: Amand Faessler
Publisher:
Published: 1993
Total Pages: 448
ISBN-13:
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Published: 1986
Total Pages:
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DOWNLOAD EBOOKThe 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).
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Published: 1994
Total Pages: 444
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DOWNLOAD EBOOKAuthor: Sanjeev Kumar
Publisher: LAP Lambert Academic Publishing
Published: 2012
Total Pages: 224
ISBN-13: 9783659233944
DOWNLOAD EBOOKThis 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: Amand Faessler
Publisher: Elsevier
Published: 2016-06-06
Total Pages: 438
ISBN-13: 1483103153
DOWNLOAD EBOOKNeutrinos in Cosmology, Astro, Particle and Nuclear Physics
Author: Bernd Heide
Publisher:
Published: 1995
Total Pages: 29
ISBN-13:
DOWNLOAD EBOOKAuthor: Roberta Ghetti
Publisher:
Published: 1993
Total Pages: 19
ISBN-13: 9789163018138
DOWNLOAD EBOOKAuthor: James Francis Dempsey
Publisher:
Published: 1997
Total Pages: 228
ISBN-13:
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Published: 1996
Total Pages: 247
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DOWNLOAD EBOOKThe 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.