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

Autor:	J. R. de Laeter, R. C. Barber
Rok vydání:	2009
Předmět:	Physics Nuclear physics Nuclear and High Energy Physics Field (physics) Isotope Abundance (ecology) Mass spectrum Neutron Atomic physics Mass spectrometry Isotopes of thorium Accelerator mass spectrometry
Zdroj:	Physical Review C. 79
ISSN:	1089-490X 0556-2813
DOI:	10.1103/physrevc.79.049801
Popis:	In their article ''Existence of Long-Lived Isomeric States in Naturally-Occuring Neutron-Deficient Th Isotopes''[Phys. Rev. C 76, 021303 (2007)], Marinov et al. fail to demonstrate that basic mass spectrometric protocols, such as abundance sensitivity, linearity, and freedom from possible interferences, have been met. In particular, the claim that four isomeric states of Th have been discovered, using an inductively coupled plasma-sector field mass spectrometer (ICP-SFMS), with abundances from (1-10)x10{sup -11} relative to {sup 232}Th, cannot be accepted, given the known abundance sensitivities of other sector field mass spectrometers. Accelerator mass spectrometry is the only mass spectrometric methodology capable of measuring relative abundances of the magnitude claimed by Marinov et al.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::562d711fcbec0f197ba3695971a4d43c https://doi.org/10.1103/physrevc.79.049801 Zobrazit plný text záznamu