On Thu, 18 Oct 2012 10:41:00 +0200
Sietse Brouwer
Alpha particles are \lohi[left]{40}{2}He.
Alpha particles are He\high{2+} (helium nucleus) not to be confused with He\low{2} (helium molecules) that DO exist but are unstable and only last 13 seconds or so. Someone needs to fix the wiki... (done!) \lohi[left]{}{4}He is a boson; \lohi[left]{}{3} is a fermion. By the way, \lohi[left]{2}{4}He is somewhat a tautology, like all such isotopic nomenclature, as He ALWAYS has an atomic number of 2, otherwise it is not He (and U ALWAYS has an atomic number of 92, otherwise it is no longer U). Alan -- Alan Braslau CEA DSM-IRAMIS-SPEC CNRS URA 2464 Orme des Merisiers 91191 Gif-sur-Yvette cedex FRANCE tel: +33 1 69 08 73 15 fax: +33 1 69 08 87 86 mailto:alan.braslau@cea.fr