Abstract: The experiment E93-026 at the Thomas Jefferson National Accelerator Facility (JLab) determined the electric form factor of the neutron Gn E through quasielastic ~d(~e; e0n)p scattering using a longitudinally polarized electron beam and a frozen polarized 1

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Abstract: The population and the mode of decay of the low-lying excited levels of 193Ir have been investigated by single and γγ coincidence spectroscopy using 192Os enriched to 99% and several HPGe detectors. From singles spectra analysis the energies of 71

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Abstract: A method of analysis for gamma angular correlation experiments was developed for the case of a multi-detector setup, tested with several known sources of radiation, and applied in the decay of the 155Eu nucleus. The method has shown good reliability. This m

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Abstract: We investigate the properties of mixed stars formed by hadronic and quark matter in equilibrium described by appropriate equations of state (EOS) in the framework of relativistic mean-field theory. We use the non-linear Walecka model for the hadron matter a

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Abstract: Compaction processes can influence soil physical properties such as soil density, porosity, pore size distribution, and processes like soil water and nutrient movements, root system distribution, and others. Soil porosity modification has important conseque

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Abstract: We describe the use of the 14C-AMS technique to study the influence of upwelling waters to the local biological production, at Arraial do Cabo, Brazil. Results on ¢14C from seaweed tissues incubated into three different types of water mass show the associat

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Abstract: We give an overall picture of our present understanding of the effect of the break-up of stable weakly bound nuclei on their fusion cross section with light, medium and heavy mass nuclei, at energies above the Coulomb barrier. The discussion is based mostly

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Abstract: We use a modified version of the Skyrme model in which the stabilizing fourth-order term is separated in two parts with different parameters that are introduced in the Lagrangian and could vary independently. The predictions for the static properties of bar

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Abstract: The availability of radioactive beams has produced great opportunities for advances in our understanding of the nucleosynthesis occurring in stellar explosions such as novae, X-ray bursts, and supernovae. At the HRIBF, we have used proton-rich beams such as

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Abstract: Only 300 out of thousands of isotopes are stable and exist in nature. The others are unstable and decay within a wide range of lifetimes. The properties of most of these rare isotopes are unknown and can only be inferred, with considerable uncertainty, from

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Abstract: The propagation of the struck proton through the nuclear medium is studied in the semi-classical multicollisional internuclear cascade approach. The probability of formation of various residual nucleus configurations and the corresponding excitation energie

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Abstract: The utilization of a position sensitive detector in tomographic systems is an attractive possibility because it is capable of furnishing the position where the ionizing event occurs. This feature can reduce significantly the image acquiring time, since a sa

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Abstract: The study of the odd 99;101Ru nuclei complements the investigation of the collectivity of the first quadrupolar excitations in 100;102;104Ru. Angular distributions for the 99;101Ru(d; d0) reactions at 13 MeV were obtained in the Pelletron Laboratory using n

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Abstract: A linear realization of flavor SU(3) × SU(3) symmetry is developped with scalar and pseudoscalar mesons coupled to baryons and massive vector fields. This system may be also coupled to colored quarks and gluons, which are expected to be deconfined above a c

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Abstract: A computer program to simulate tomographic images generated by transmitted radiation was developed. The algorithm uses a deterministic approach to generate the projections, which supply an existing image reconstruction software. A dispersion associated with

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Abstract: Using a relativistic nuclear optical potential consisting of a Lorentz scalar, Vs, and the time-like component of a four-vector potential, V0, with a Gaussian form factor, we have calculated elastic scattering differential cross sections and polarizations f

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Abstract: Angular distributions for the inelastic scattering of 13.0 MeV deuterons on 104;106;108;110Pd were measured with the S˜ao Paulo Pelletron-Enge-Spectrograph facility in the range of 120 · µlab · 640. A Coulomb-Nuclear Interference analysis, employing the Dis

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Abstract: We address the description of nuclear dynamics at intermediate energies within the DYWAN model. New fluctuation-dissipation aspects are discussed and confronted with experimental results in nucleus-nucleus and in nucleon-nucleus reactions. We show that the

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Abstract: The potentialities of coherent X-radiation for investigation of structural features of self-assembled systems and liquid crystals was studied using Monte Carlo techniques. The radiation spectra were simulated for the case of interaction of 20 MeV electrons

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Abstract: This paper describes the IPEN Cyclotron CV-28, and its utilization in basic and applied physics and to drive a zero power lead Accelerator Driven System (ADS), as a milestone in a road map for a program or network on the utilization of accelerators. Prelimi

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Abstract: High spin states in the neutron rich 188Os and 190Os nuclei have been populated using the 82Se + 192Os deepinelastic reaction. The level schemes are extended up to spin I ¼21. The observed new structures are tentatively interpreted as fragments of rotationa

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Abstract: Symmetries and statistical properties in nuclei are closely related. The most striking example is the extremely large enhancement of parity violation in neutron resonances. Statistical distributions can provide information about the underlying character of

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Abstract: With the nuclear fission discovery and development of nuclear weapons in 1940s, artificial radioisotopes were introduced in the environment. This contamination is due to worldwide fallout by superficial nuclear tests realized from early 1950s to late 1970s

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Abstract: The use of protons instead of X-rays for computerized tomography (CT) studies has potential advantages, especially for medical applications in proton treatment planning. However, the spatial resolution of proton CT is limited by multiple Coulomb scattering

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Abstract: We studied the double-charge-exchange reaction on 93Nb and 56Fe targets. The energy dependence of forward transition was calculated based on an optical model with the nuclear structure described in the pseudo-SU(4) model.

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Abstract: The absolute neutron activation analysis (ANAA) technique was used for the determination of some elements on body organs, such as, kidney, heart, muscles and spleen of small-sized animals used on experiments in health area. The advantages and limitations of

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Abstract: In the framework of studies concerning new fuel cycles and nuclear wastes produced by reactors, we have undertaken a number of measurements in order to determine the radiative capture and/or the fission cross sections of neutron induced reactions on several

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Abstract: Partial wave analysis and the decoupling of the wave equations based on potential barriers modified by coupling effects are applied in the study of the fusion process in medium heavy nuclei. Several relevant physical quantities are calculated in order to pr

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Abstract: We report the preliminary result of an exact calculation of the asymmetry parameter, a¤, in the nonmesonic hypernuclear decay, based on a one-meson-exchange (OME) model. For the case of 5 ¤He and including onepion- exchange only, the result is shown not to

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Abstract: Anions with atomic number lower than 18 had their total electron detachment cross sections measured in the 0.3-1.5 a:u: velocity range (40 keV-1.4 MeV) for He, Ne, and Ar targets with a experimental method developed in our laboratory. Several universal tren

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Abstract: PHOBOS is one of the four heavy ion experiments currently running at the Relativistic Heavy Ion Collider (RHIC). In this paper we will present some of the current results from PHOBOS: the study of charged multiplicity distribution as function of pseudorapid

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Abstract: In this work we study the effects of temperature on the equations of state within a relativistic model, with the inclusion of the baryons of the octet over a wide range of densities. We compare the results of the equation of state, effective mass and strang

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Abstract: The spectra and the beta decay of the Ni-Cu-Zn isotopes with A=58, 59 and 60 are studied by using the pseudo- SU(4) model.

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Abstract: This paper presents results of 137Cs concentration measured from a guava tree cultivated after the first decontamination work of one of the sites where the worst Brazilian radiological accident occurred. The present work aims to verify how the 137Cs is tran

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Abstract: Recent developements in our understanding of the fundamental nucleon-nucleon interaction are reviewed. Among the topics considered are (1) the so-called high-precision nucleon-nucleon potentials that emerged in the mid 1990s, (2) progress in the microscopic

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Abstract: The methodology for simulating all detection processes in a 4¼¯ ¡ ° coincidence system by means of the Monte Carlo technique is described. The goal is to predict the behavior of the observed activity as a function of the 4¼¯ detector efficiency. In this app

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Abstract: We have extended the Dirac-Hartree-Bogoliubov (DHB) approximation developed in a previous work [1] with the inclusion of blocking terms in order to study the pairing properties of both even and odd nuclei. We have concentrated our attention in the isotope c

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Abstract: Coulomb excitation matrix elements are often expressed in terms of the scalar electric potential and the electromagnetic fields. We show that, through an appropriate gauge transformation, the excitation matrix elements can always be expressed in terms of th

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Abstract: The neutrino-nucleus cross-section and the muon capture rate are discussed within a simple formalism which facilitates the nuclear structure calculations. The corresponding formulae only depend on four types of nuclear matrix elements, which are currently u

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Abstract: Within the instanton liquid model, we study the dependence of the gauge invariant two–point quark correlator on the path used to perform the color parallel transport between two points in the Euclidean space.

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Abstract: Fusion cross-sections were measured for the 6Li+27 Al;64 Zn and 9Be+64Zn systems at energies around the Coulomb barrier, in order to study the influence of the break-up of weakly bound nuclei on the fusion process.

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Abstract: We show that the systematic inconsistence found in the simultaneous fit of the neutron and proton magnetics moments in light-front models, disappears when one allows an asymmetry in the constituent quark masses. The difference between the constituent quarks

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Abstract: Topological charge screening in the QCD vacuum is found to provide crucial nonperturbative contributions to the short-distance expansion of the pseudoscalar (0¡+) glueball correlator. The screening contributions enter the Wilson coefficients and are an indi

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Abstract: A phenomenological model which has had some success in explaining polarization phenomena and left-right asymmetry in inclusive proton-proton scattering is considered for reactions involving photons. In particular, the reactions (a) ° + p ! H + X; (b) ° + p(

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Abstract: The electromagnetic current of spin-1 composite particles does not transform properly under rotations if only the valence contribution is considered in the light-front model. In particular, the plus component of the current, evaluated only for the valence c

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Abstract: A new experiment to measure differential cross sections as a function of the bombarding energy and scattering angle for the 16O +28 Si system in order to discriminate regular and chaotic regimes, was performed using the particle spectrometer CHICO combined

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Abstract: In the present work we discuss the contribution of the vacuum polarization on the nuclear pairing, in the context of the relativistic Hartree-Fock-Bogoliubov (HFB) approximation. The polarization effects on the pairing, as a function of Fermi momentum, is s

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Abstract: We develop a Dirac-Hartree-Fock-Bogoliubov description of nuclear matter pairing in 1S0 and 3S1 ¡3 D1 channels. Here we investigate the density dependence ot the 1S0 and 3S1 ¡3 D1 pairing fields in asymmetric nuclear matter, using a Bonn meson-exchange inte

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Abstract: Results which have been recently obtained with the Boltzmann master equation and the FLUKA code in the analysis of heavy ion interactions at relative energies ranging from Coulomb barrier up to a few GeV/n are discussed.

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Abstract: Our group at the Laboratorio do Acelerador Linear (IFUSP- USP) is currently developing several studies related to the interaction of different kinds of radiation with DNA. Initially, our plan is to study the interactions proton-DNA, gamma-DNA and neutron-DN

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Abstract: Experimental studies have obtained the caloric curve of nuclear matter from heavy ion collisions as well as its dependence on the size of the fragmenting source. In particular it has been determined that smaller systems have caloric curves with higher plate

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Abstract: Fusion cross section excitation functions were measured for the 6;7Li+59Co systems (12 · Elab · 26MeV ) aiming the investigation of the effect of the breakup process on the fusion cross section. The experimental method consisted on the detection of °-rays f

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Abstract: Precision measurements of the structure of nucleons and nuclei in the regime of strong interaction QCD are now possible with the availability of high current polarized electron beams, polarized targets, and recoil polarimeters, in conjunction with modern sp

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Abstract: A small-mass system has been developed for monitoring the flux of neutrons with energy up to 1 MeV at the new time-of-flight facility at CERN, n TOF. The monitor is based on a thin Mylar foil with a 6Li deposit, placed in the neutron beam, and an array of S

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Abstract: The probability of a compound residual hot hypernucleus formation at the end of pre-equilibrium phase of high energy photonuclear reactions is calculated with a time dependent Monte Carlo Multicollisional Cascade (MCMC) approach. The emission of hadrons dur

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Abstract: A simple approach to evaluate nuclear photofissilities at energies above the pion photoproduction threshold has been developed. It is based on the current, two-step model for intermediate-energy photonuclear reactions, i.e. a photon-induced intranuclear cas

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Abstract: The spectroscopic study of unbound states in the 6Li nucleus was performed by measuring the energy spectrum of the ®-particles emitted from the transfer reaction 3He(7Li; ®)6Li. The 7Li beam at ELab = 31:2MeV was produced at the S˜ao Paulo Pelletron acceler

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Abstract: In this work we describe the results obtained with S3590-06 and ion-implanted diodes for alpha particle spectrometry. Satellite peaks were also investigated in order to identify not only the origin of these phenomena, but also the importance of the guard ri

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Abstract: The procedure followed by the Laborat´orio de Metrologia Nuclear (LMN) at the IPEN, in S˜ao Paulo, for the standardization of the 45Ca is described. The activity measurement was carried out in a 4¼¯-° coincidence system, by the tracing method. The radionucl

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Abstract: The procedure followed by the Laborat´orio de Metrologia Nuclear (LMN) at the IPEN, in S˜ao Paulo, for the standardization of the 45Ca is described. The activity measurement was carried out in a 4¼¯-° coincidence system, by the tracing method. The radionucl

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Abstract: In the framework of the QCD parton model, we study unpolarized scattering of high energy real photons from a proton target into lepton pairs and a system of hadrons. For a given parametrization of parton distributions in the proton, we calculate the cross s

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Abstract: The polymers Tetrafluoroethylene- hexa- fluoropropylene (FEP) and Tetrafluoroethylene- per- fluoromethoxyethelene (PFA) are normally used as anti-adherent coatings and can also be applied for several applications in research. For example, they can be used a

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Abstract: In this paper we summarize the status of the racetrack microtron that is under construction at IFUSP, showing the achievements obtained in the transport, RF, control and vacuum systems. A description of the experimental equipment that will be available to t

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Abstract: This report describes a method for calculating fusion and decay probabilities in reactions leading to the production of transfermium elements. The competition between quasi-fission and fusion is described on the basis of the Dinuclear System Concept (DNSC).

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Abstract: We developed a model to describe the radiation-DNA interaction in water solution. The model is based on some important aspects of the Bethe Theory for the ionizing process, and on the assumption that the direct interaction between the incident particle and

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Abstract: Experimental data on light nuclei close to dripline suggests that as the nucleon number asymmetry increases, the shell structure from stability line is not preserved. In contrast with spherical shell model, Elliott’s SU(3) model, uses a deformed multi-nucle

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Abstract: The progress of nuclear physics had allowed a better understanding of nuclear structure and reaction mechanisms, but also enables important applications of nuclear energy in our modern way of life. We can point out those ones related to power generation fro

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Abstract: Three different substrates for the analysis of liquid samples by Total Reflection X-Ray Fluorescence with Synchrotron Radiation (SR-TXRF) were investigated and compared: Lucite (Perspex), Kimfoil and Mylar. Dry targets were prepared by pipetting 5 ¹l aliquo

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Abstract: In this work we have studied the direct detection and spectrometric capabilities for internal conversion electrons of an ion-implanted diode, developed in the framework of R&D programs at CERN, envisaging its use in an electron-gamma coincidence system for

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Abstract: I present in this talk the latest results of the neutron spin physics program at Jefferson Laboratory in Hall A using the highly polarized electron beam and a high pressure polarized 3He target. This program includes among others experiment E99-117 in which

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Abstract: The PARRNe (Production d’Atomes Radioactifs Riches en Neutrons) experimental program has been part of the recent R&D efforts for the design of the SPIRAL2 project at GANIL. The PARRNe2 set-up installed at IPNOrsay allows the use of the Tandem as a deuteron

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Abstract: The PrimEx (Primakoff Experiment) Collaboration is currently preparing to perform a high precision (1.4%) measurement of the two photon decay width of the neutral pion, ¡¼o!°°. The proposed 12 GeV upgrade of the CEBAF accelerator will enable a significant e

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Abstract: The set of experiments forming the g8a run took place in the summer of 2001 in Hall B of Jefferson Lab. The g8a run was the commissioning experiment for the linearly-polarized photon beam at CLAS. The aim of these experiments is to improve the understanding

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Abstract: New accelerator facilities for radioactive-ion beams and high-intensity stable beams will start operation in a few years. Although these beams will provide interesting opportunities for exploring unknown territories of the nuclear landscape, the experimenta

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Abstract: The 105Rh nucleus has been studied by in-beam ° spectroscopy with the heavy-ion fusion-evaporation reaction 100Mo(11B, ®2n°) at 43 MeV. A rich variety of structures was observed at high and low spin, using ° ¡ ° ¡ t and ° ¡°¡ particle coincidences and direc

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Abstract: The neutron deficient 141Tb nucleus has been studied with the 92Mo (54Fe, ®p) reaction at 240-MeV incident energy and the multidetector array GASP. For the yrast ¼h11=2 decoupled band, excited states up to 6.7 MeV and spin up to 47=2¡ have been observed. Th

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Abstract: The 108Pd nucleus has been studied with the 100Mo(11B, p2nγ) reaction at 43 MeV incident energy. γ −γ −t, γ−γ− charged particle coincidences and directional correlation ratios were measured using the γ sp

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