Addendum to 'Search for elusive neutral particles in nuclear decay'
F W N de Boer; J Deutsch; J Lehmann; R Prieels; J Steyaert; F W N de Boer; Inst. de Phys. Nucleaire, Univ. Catholique de Louvain, Belgium; J Deutsch; Inst. de Phys. Nucleaire, Univ. Catholique de Louvain, Belgium; J Lehmann; Inst. de Phys. Nucleaire, Univ. Catholique de Louvain, Belgium; R Prieels; Inst. de Phys. Nucleaire, Univ. Catholique de Louvain, Belgium; J Steyaert; Inst. de Phys. Nucleaire, Univ. Catholique de Louvain, Belgium
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1989-08-01
Аннотация:
Recently (de Boer et al., J. Phys. G:Nucl. Phys. vol.14, p.L131, 1988) the result has been published of a search for short-lived particles in the 0<sup>+</sup> to 0<sup>+</sup> transition of 6.05 MeV in <sup>16</sup>O. No electron-positron pairs were observed above the continuum of internal pair creation, and correspondingly an upper limit was deduced for the emission branching-ratio of a possible short-lived elusive particle. However, in the evaluation of this limit the authors neglected to include the angular broadening of an electron-positron peak due to multiple scattering in the target. This correction has now been evaluated, estimating for both bombarding energies the mean-depth of the activity on the basis of cross section data and by computing the corresponding distortion of the electron-positron angular distribution due to the energy-dependent multiple scattering in the target.
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