Search for long-lived isomeric states in neutron-deficient thorium isotopes

2008/12/19 by Johannes Lachner, J. Lachner, I. Dillmann +5 · 2 citations
Chemistry · Physics and Astronomy · #Accelerator mass spectrometry #Chemistry #Isotope #Isotopes of thorium #Mass spectrometry #Neutron #Nuclear Physics and Applications #Nuclear physics #Nuclear physics research studies #Physics #Radioactive Decay and Measurement Techniques #Radiochemistry #Thorium #Uranium #nucl-ex

paper · pdf · doi:10.1103/physrevc.78.064313

published as Phys.Rev.C78:064313,2008 · 3 pages, 1 figure

openalex publication_date 2008/12/19 · arxiv created 2009/07/01 · arxiv updated 2010/11/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The discovery of naturally occurring long-lived isomeric states (t_1/2>10⁸ yr) in the neutron-deficient isotopes ^{211,213,217,218}Th [A. Marinov et al., Phys. Rev. C 76, 021303(R) (2007)] was reexamined using accelerator mass spectrometry (AMS). Because AMS does not suffer from molecular isobaric background in the detection system, it is an extremely sensitive technique. Despite our up to two orders of magnitude higher sensitivity we cannot confirm the discoveries of neutron-deficient thorium isotopes and provide upper limits for their abundances.

Citations

• Existence of long-lived isomeric states in naturally-occurring neutron-deficient Th isotopes
• Synthesis of the Elements in Stars
• The new isotope 270110 and its decay products 266Hs and 262Sg

Cited by

• Extended periodic table [wikipedia]
• Unbibium [wikipedia]

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