HAL : in2p3-00275768, version 1
 arXiv : 0804.3869
 Evidence for a long-lived superheavy nucleus with atomic mass number A=292 and atomic number Z=$\sim$122 in natural Th
 (2008)
 Evidence for the existence of a superheavy nucleus with atomic mass number A=292 and abundance (1-10)x10^(-12) relative to ^{232}Th has been found in a study of natural Th using inductively coupled plasma-sector field mass spectrometry. The measured mass matches the predictions [1,2] for the mass of an isotope with atomic number Z=122 or a nearby element. Its estimated half-life of t1/2 >= 10^8 y suggests that a long-lived isomeric state exists in this isotope. The possibility that it might belong to a new class of long-lived high spin super- and hyperdeformed isomeric states is discussed.[3-6]
 Thème(s) : Physique/Physique Nucléaire Expérimentale
 Lien vers le texte intégral : http://fr.arXiv.org/abs/0804.3869
 in2p3-00275768, version 1 http://hal.in2p3.fr/in2p3-00275768 oai:hal.in2p3.fr:in2p3-00275768 Contributeur : Béatrice Forrler <> Soumis le : Vendredi 25 Avril 2008, 11:05:39 Dernière modification le : Vendredi 25 Avril 2008, 11:17:17