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Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes
Marinov A., Rodushkin I., Kashiv Y., Halicz L., Segal I. et al
Physical Review C 76 (2007) 021303 - http://hal.in2p3.fr/in2p3-00175822
Chimie/Radiochimie
Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes
A. Marinov, I. Rodushkin, Y. Kashiv, L. Halicz, I. Segal, A. Pape1, R.V. Gentry, H.W. Miller, D. Kolb, R. Brandt
1 :  DRS-IPHC - Département Recherches Subatomiques
CNRS : UMR7178 – IN2P3 – Université Louis Pasteur - Strasbourg I
23 rue du Loess - BP28 67037 Strasbourg cedex 2
France
Four long-lived neutron-deficient Th isotopes with atomic mass numbers 211 to 218 and abundances of (1-10)x10(-11) relative to Th-232 have been found in a study of naturally-occurring Th using inductively coupled plasma-sector field mass spectrometry. It is deduced that long-lived isomeric states exist in these isotopes. The hypothesis that they might belong to a new class of long-lived high spin super- and hyperdeformed isomeric states is discussed.

Articles dans des revues avec comité de lecture
2007
Physical Review C (Phys. Rev. C)
Publisher American Physical Society
ISSN 0556-2813 (eISSN : 1089-490X)
76
021303
©2007 The American Physical Society

21.10.Tg, 21.10.Dr, 27.80.+w
FIELD MASS-SPECTROMETRY – SPONTANEOUS FISSION – O-16+AU-197 REACTION – SUPERDEFORMED BAND – DECAY – ELEMENTS – DISCOVERY – NUCLEI – PLASMA – BETA