Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes

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Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes

A. Marinov, I. Rodushkin, Y. Kashiv, L. Halicz, I. Segal, A. Pape, R. V. Gentry, H. W. Miller, D. Kolb, and R. Brandt

Phys. Rev. C 76, 021303(R) – Published 23 August 2007

Abstract

Four long-lived neutron-deficient Th isotopes with atomic mass numbers 211 to 218 and abundances of ( $1 - 10$ ) $\times 10^{- 11}$ relative to ${}^{232}{Th}$ 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.

Received 5 July 2007

DOI:https://doi.org/10.1103/PhysRevC.76.021303

Authors & Affiliations

A. Marinov^1,*, I. Rodushkin², Y. Kashiv¹, L. Halicz³, I. Segal³, A. Pape⁴, R. V. Gentry⁵, H. W. Miller⁶, D. Kolb⁷, and R. Brandt⁸

¹Racah Institute of Physics, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
²Analytica AB, Aurorum 10, S-977 75 Luleå, Sweden
³Geological Survey of Israel, 30 Malkhei Israel St., Jerusalem 95501, Israel
⁴IPHC-UMR7178, IN2P3-CNRS/ULP, BP 28, F-67037 Strasbourg cedex 2, France
⁵Earth Science Associates, P.O. Box 12067, Knoxville, Tennessee 37912-0067, USA
⁶P. O. Box 1092, Boulder, Colorado 80306-1092, USA
⁷Department of Physics, University GH Kassel, D-34109 Kassel, Germany
⁸Kernchemie, Philipps University, D-35041 Marburg, Germany

^*marinov@vms.huji.ac.il; Fax: +972-2-6586347.

Comments & Replies

Comment on “Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes”

R. C. Barber and J. R. De Laeter

Phys. Rev. C 79, 049801 (2009)

Reply to “Comment on ‘Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes’”

A. Marinov, I. Rodushkin, Y. Kashiv, L. Halicz, I. Segal, A. Pape, R. V. Gentry, H. W. Miller, D. Kolb, and R. Brandt

Phys. Rev. C 79, 049802 (2009)

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Vol. 76, Iss. 2 — August 2007

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Physical Review C

covering nuclear physics