301 research outputs found
On the IMF Multiplicity in Au+Au Reactions
Intermediate mass fragment (IMF) multiplicity has been investigated for Au+Au
reactions at incident energies of 100, 250 and 400 MeV/A. From the analysis of
the impact-parameter-dependence of the IMF multiplicity using our QMD plus
statistical evaporation model, we found that 1) statistical decay process
modifies the results greatly, and 2) the Fermi motion plays a role to increase
the IMF multiplicity for whole impact-parameter range.Comment: 9pages, Latex is used, 2 Postscript figures are available by request
from [email protected]
Applicability of the QMD model to various nuclear reactions
The basic formulation and the detail of the parameters included in the standard QMD model, JQMD (JAERI Quantum Molecular Dynamics) are described. Various cross sections calculated by the QMD model are compared with the data at various energies for heavy ion reactions and also nucleon induced reactions. The range of the applicability of the QMD model and the limitation of the QMD model are discussed
Multifragmentation through Exotic Shape Nuclei in alpha(5GeV/u) + Au Reactions
We simulate the fragmentation processes in the {~~Au~} collisions
at a bombarding energy of 5 GeV/u using the simplified RQMD approach plus the
statistical decay model. We find from the simulation that the
angular-distribution of the intermediate mass fragments has a sideward peak,
more strongly in the transverse direction than in the beam-direction, when the
intermediate nucleus formed by the dynamical process has an annular eclipse
shape, which explains the experimental results.Comment: 11pages, Rectex is used, 3 Color-Postscript figures are also
available by request from [email protected]
Relativistic Effects in the Transverse Flow in the Molecular Dynamics Framework
In order to investigate relativistic effects we compare the transverse flow
calculated by using the four versions of the QMD approaches with that of the
full covariant RQMD approach. From the comparison we conclude that the
simplified RQMD (RQMD/S), which uses the common time coordinate to all
particles, can be used instead of RQMD up to 6 GeV/u.Comment: 6pages, Latex is used, 1 Postscript figures are available by request
from [email protected]
Analysis of proton-induced fragment production cross sections by the Quantum Molecular Dynamics plus Statistical Decay Model
The production cross sections of various fragments from proton-induced
reactions on Fe and Al have been analyzed by the Quantum
Molecular Dynamics (QMD) plus Statistical Decay Model (SDM). It was found that
the mass and charge distributions calculated with and without the statistical
decay have very different shapes. These results also depend strongly on the
impact parameter, showing an importance of the dynamical treatment as realized
by the QMD approach. The calculated results were compared with experimental
data in the energy region from 50 MeV to 5 GeV. The QMD+SDM calculation could
reproduce the production cross sections of the light clusters and
intermediate-mass to heavy fragments in a good accuracy. The production cross
section of Be was, however, underpredicted by approximately 2 orders of
magnitude, showing the necessity of another reaction mechanism not taken into
account in the present model.Comment: 12 pages, Latex is used, 6 Postscript figures are available by
request from [email protected]
Integrated Simulation of Fragmentation, Evaporation, and Gamma-decay Processes in the Interaction of Cosmic-ray Heavy Ions with the Atmosphere using PHITS
General-purpose Monte-Carlo radiation tranport calculation code PHITS is applied to calculate prompt gamma-ray emission from cosmic-ray heavy ions fragmented in the atmosphere. Event-by-event simulation of spallation reactions by cosmic-ray heavy ions was performed by combination of three reaction models, responsible for different reaction phases
Estudio del proceso inmediato en el derecho comparado entre Perú, Argentina y España, en el año 2021
La investigación tuvo como principal objetivo analizar la regulación del proceso
inmediato en el Perú, Argentina y España; se analizó la base doctrinaria penal,
tesis, revistas y artículos a nivel nacional e internacional, referida al proceso
inmediato. Se empleó la metodología de tipo básica, con diseño analítico
descriptivo y bajo un enfoque cualitativo, siendo la técnica usada el análisis
documental, arrojando como resultado que en nuestra legislación el proceso
inmediato presenta deficiencias y atenta contra los derechos del imputado y de la
parte defensora, no permitiendo que el fiscal logre consolidar sus pruebas, para así
garantizar un juicio justo y que respete la dignidad humana y la igualdad ante la ley,
mientras que en la legislación Argentina, no se habla específicamente de un
proceso inmediato, sino de un procedimiento especial, que está reservado
específicamente para los casos de flagrancia; y en España, se le denomina “Juicios
rápidos”, ya que la norma procesal desarrolla este concepto a razón de una lista
taxativa de delitos y en circunstancias de flagrancia. Concluyendo, que la
normatividad existente debe ser evaluada y corregida, tal como sucede en otros
países, solo así los administradores de justicia otorgarán la protección respectiva
al imputad
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