Coulomb nuclear interference with deuterons in even palladium isotopes

• Autor(a) principal: Rodrigues,M. R. D.
• Data de Publicação: 2004
• Outros Autores: Rodrigues,C. L., Borello-Lewin,T., Horodynski-Matsushigue,L. B., Duarte,J. L. M., Ukita,G. M.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Brazilian Journal of Physics
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332004000500018

Angular distributions for the inelastic scattering of 13.0 MeV deuterons on 104;106;108;110Pd were measured with the Sao Paulo Pelletron-Enge-Spectrograph facility in the range of 12(0) < thetalab < 64(0). A Coulomb-Nuclear Interference analysis, employing the Distorted Wave Born Approximation with the Deformed Optical Model as transition potential, under well established global optical parameters, was applied to the first quadrupolar excitations. The values of C = <IMG SRC="/img/revistas/bjp/v34n3a/a14img02.gif">/ <IMG SRC="/img/revistas/bjp/v34n3a/a14img01.gif">, the ratio of charge to isoscalar deformation lengths, and of (<IMG SRC="/img/revistas/bjp/v34n3a/a14img01.gif">)² were extracted through the comparison of experimental and predicted cross section angular distributions. The ratios of reduced charge to isoscalar transition probabilities, B(EL) to B(ISL) respectively, are related to the square of the parameter C and were thus obtained with the advantage of scale uncertainties cancellation. For 104Pd, and preliminary for 108Pd, the respective values of C = 1.18(3) and C = 1.13(4) reveal an enhanced contribution of the protons relative to the neutrons to the excitation, while a smaller effect is found for 106Pd, C = 1.06(3) and for 110Pd, C = 1.07(3), in comparison with the value C = 1.00 expected for homogenous collective excitations.