Role of Higher Multipole Excitations in the Electromagnetic Dissociation of One Neutron Halo Nuclei

European Physical Journal A (Impact Factor: 2.74). 01/2008; 35(2). DOI: 10.1140/epja/i2007-10538-7
Source: arXiv


We investigate the role of higher multipole excitations in the electromagnetic dissociation of one-neutron halo nuclei within two different theoretical models -- a finite range distorted wave Born approximation and another in a more analytical method with a finite range potential. We also show, within a simple picture, how the presence of a weakly bound state affects the breakup cross section.

Download full-text


Available from: Andrea Vitturi, May 28, 2013
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Essential properties of halo nuclei can be described in terms of a few low-energy constants. For neutron halo nuclei, analytical results can be found for wave functions and electromagnetic transition matrix-elements in simple but well-adapted models. These wave functions can be used to study nuclear reactions; an especially simple and instructive example is Coulomb excitation. A systematic expansion in terms of small parameters can be given. We present scaling laws for excitation amplitudes and cross sections. The results can be used to analyze experiments like ${}^{11}$Be Coulomb excitation. They also serve as benchmark tests for more involved reaction theories.
    Full-text · Article · Sep 2008 · European Physical Journal A
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Progress in breakup reaction theories, like the distorted wave Born approximation, the continuum discretized coupled channels method and the dynamical eikonal approximation, is brought into focus. The need to calculate exclusive reaction observables and the utility of benchmark tests as arbitrators of theoretical models are discussed. KeywordsBreakup theories-post and prior forms-distorted wave Born approximation-continuum discretized coupled channels-dynamical eikonal
    Full-text · Article · Jul 2010 · Pramana
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: We present a fully quantum mechanical theory to study the effects of deformation on various reaction observables in the Coulomb breakup of neutron rich exotic medium mass nuclei on heavy targets within the framework of finite range distorted wave Born approximation by using a deformed Woods-Saxon potential. As an application of this theory, we calculate the one-neutron removal cross section, relative energy spectra, parallel momentum distributions and angular distributions in the breakup of 31Ne on Pb and Au targets at 234 MeV/u. We suggest ways to put constraints on the large uncertainty in the one-neutron separation energy of 31Ne and also argue that if 31Ne is indeed a halo nucleus then it should be a deformed one.
    Full-text · Article · Dec 2013 · Nuclear Physics A
Show more