Exotic Nuclei
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Núcleos exóticos e síntese dos elementos químicos
We have around ninety chemical elements available in nature, which were produced mainly by nuclear reactions inside stars. The fusion reactions are the main synthesis process which generates the light and intermediate masses elements. The synthesis begins with the hydrogen burning reaching the region of iron mass nuclei. Heavier elements are synthesized by n
Química Nova. Publicado em: 2012
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2. Estudo de sistemas de núcleos exóticos leves 6He, 7Be+9Be / Study of light exotic nuclei 6He,7Be+9Be systems.
Neste trabalho é apresentado um estudo do espalhamento elástico e de reações nucleares dos sistemas exóticos leves 6He+9Be e 7Be+9Be. A colisão 6He+9Be foi medida nas energias de Elab = 16,2 MeV e 21,3 MeV utilizando o sistema RIBRAS (Radioactive Ion Beams in Brasil) do Instituto de Física da Universidade de São Paulo. Foram medidas distribuições a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/05/2011
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3. Study of the interaction of mass A=8 nuclei with carbon target and of the capture reaction 8Li(p,y)9Be of astrophysical interest / Estudo da interação de núcleos de massa A=8 com alvo de carbono e da reação de captura 8Li(p,)9Be de interesse astrofísico
The measurements of the angular distributions for the elastic scatterings 12C(Li,Li) and 12C(8B,8B) reported in this work have been done in two laboratories. Those corresponding to the angular distributions for the elastic scattering 12C(8Li,8Li) were performed at two ene&ies, 20.6 MeV and 23.9 MeV, at the Pelletron Laboratory of the University of São Paulo
Publicado em: 2009
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4. Estudo da reação 8Li(p,)5He com feixe radioativo de 8Li / Study of the reaction 8Li(pix)SHE with radioactive beans of 8Li
Com a instalação do sistema RIBRAS no Laboratório Pelletron, abriu-se a oportunidade para a realização de experiências com núcleos radioativos, como por exemplo o8Li. Experiências com feixe de 8Li tem sido alvo de interesse, por parte da comunidade ciência, pois reações com esse núcleo permitem a sínteses de elementos mais pesados do que o 7Li,
Publicado em: 2009
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5. Estudo do espalhamento elástico de projetéis exóticos por alvo de massa intermediária / Study of elastic scattering between exotic projectiles and medium target
Radioactive beams of 8Li and 6He were produced using the double superconducting solenoid system of RIBRAS (Radioactive Ion Beams in Brasil) with a primary beam of 7Li of Elab = 30 MeV, at the São Paulo Pelletron Accelerator. The production reactions were 9Be(7Li, 8Li)8Be and 9Be(7Li, 6He)10B. The angular distributions of the elastic scattering of the 8Li ra
Publicado em: 2007
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6. "Study of the Elastic Scattering Between Nuclei Light Heavy Radioactive Stable" / "Estudo do Espalhamento Elástico Entre Núcleos Pesados Leves Estáveis e Radioativos"
The angular distributions of the elastic scattering for the 12C+28Si and 6He+27Al systems have been measured, in energies close to the Coulomb barrier. For the 12C+28Si system the data were obtained at energies Ec.m. = 12.4 - 25.2MeV and to 6He+27Al system were measured four energies Elab = 9.5, 11, 12 and 13.4MeV. The analysis of the angular distributions w
Publicado em: 2006
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7. Nuclear reaction studies with exotic boron beams
Spectroscopic investigation, on exotic nuclei, performed in two different experiments with secondary radioactive boron beams are discussed. Spectroscopic factors for the 13B+n bound-states are obtained by measuring momentum distribution of the 13B residual nucleus from knockout reaction of the 14B beam at intermediate energy. The momentum distributions are m
Brazilian Journal of Physics. Publicado em: 2004-09
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8. Beta decay and structure of exotic nuclei in the mass regions N=Z, A ~ 70 and near the N=20 closed shell
This paper describes two beta decay experiments performed at the CERN/ISOLDE mass separator. The structure of 74Kr has been studied using a total absorption gamma spectrometer (TAgS). The measured Gamow-Teller strength is presented and compared to HFBCS+QRPA calculations. The 33Na decay is also presented. The structure of the 33Mg daughter nucleus is compare
Brazilian Journal of Physics. Publicado em: 2004-09
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9. JLab: probing hadronic physics with electrons and photons
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 spectrometers and detector instrumentation. The physics at JLab will be highlighted using two recent meas
Brazilian Journal of Physics. Publicado em: 2004-09
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10. The continuum in reactions with light exotic nuclei
One of the most striking features of dripline nuclei is their very low binding energy. The proximity to threshold implies that many of the standard reactions should take into account the possibility of the nucleus breaking up into the continuum and rearranging itself within the continuum, throughout the reaction process. Whereas for stable nuclei often struc
Brazilian Journal of Physics. Publicado em: 2003-06
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11. Radioactive ion beams in Brasil (RIBRAS)
The study of the so called exotic nuclei constitutes an important field of research in nuclear physics. The possibility of producing secondary beams of unstable nuclei(RIB) allows the investigation of nuclei at extreme conditions as low binding energies, high angular momentum and isospin. More laboratories are going through the process of re-direction of the
Brazilian Journal of Physics. Publicado em: 2003-06
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12. Estudos dos parâmetros de deformação dos isótopos 24Mg, 30Mg e 32Mg / Studies of the deformation parameters of the isotopes 24mg, 30mg and 32Mg
A proposta deste trabalho é estudar as distribuições de prótons e nêutrons e suas deformações na região da \"ilha de inversão\". Esta região, situada entre 10 Z 14 e 19 N 21, apresentar anomalias como núcleos fortemente deformados perto do número mágico N=20. Os parâmetros de deformação de carga e de matéria dos isótopos de 24Mg, 30Mg e 32M
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 06/10/1999