HAL : in2p3-00275768, version 1

arXiv : 0804.3869

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Evidence for a long-lived superheavy nucleus with atomic mass number A=292 and atomic number Z=$\sim$122 in natural Th

A. Marinov, I. Rodushkin, D. Kolb, A. Pape1, Y. Kashiv, R. Brandt, R.V. Gentry, H.W. Miller

(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]

1 :	DRS-IPHC - Département Recherches Subatomiques

Thème(s)

:

Physique/Physique Nucléaire Expérimentale

in2p3-00275768, version 1

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Contributeur : Béatrice Forrler <>

Soumis le : Vendredi 25 Avril 2008, 11:05:39

Dernière modification le : Vendredi 25 Avril 2008, 11:17:17