Alpha-spectroscopy of Cf-252 decays: A new approach to searching for the   octoneutron
  Recently an experimental evidence of emission of neutron clusters consisting of eight neutrons - octoneutrons was reported. The experiment was based on the search for daughter nuclei associated with the octoneutron radioactivity of the Cf-252 nucleus. The effect of long-time build-up of daughter nuclei with a long half-life and gamma spectroscopy was utilized. In this paper we consider the alpha spectroscopy as an alternative method of searching for octoneutron in Cf-252 decays. 
Hrant Gulkanyan and Amur Margaryan
nucl-ex