Isotope Pattern Calculator


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Element 122?

Hard to know what to make of this as it is not my field. But here is a claim for element 122, or maybe 124, detection in thorium by a mass spectrometric method. The authors have claimed previously the observation of very heavy isotopes, for instance Rg isotopes in the mass spectra of natural gold.

Abstract: "Evidence for the existence of a superheavy nucleus with atomic mass number A=292 and abundance (1-10) x 10-12 relative to 232Th has been found in a study of natural Th using inductively coupled plasma-sector field mass spectrometry. The measured mass matches the predictions for the mass of an isotope with atomic number Z=122 or a nearby element. Its estimated half-life of t1/2 <= 108 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."

Full reference: A. Marinov, I. Rodushkin, D. Kolb, A. Pape, Y. Kashiv, R. Brandt, R.V. Gentry, and H.W. Miller, "Evidence for a long-lived superheavy nucleus with atomic mass number A=292 and atomic number Z=~122 in natural Th", http://arxiv.org/abs/0804.3869v1. Submitted 24 April 2008.

Argon isotope mass measurements

A physicsweb.org article states that an international team working at the ISOLTRAP mass spectrometer at CERN has determined the masses of two isotopes of argon (32Ar and 33Ar) with the highest precision ever. This is important if you want "to place constraints on aspects of the weak interaction that are not included in the Standard Model".1

WebElements: the periodic table on the WWW [http://www.webelements.com/]

Copyright 1993-2015 Mark Winter [The University of Sheffield and WebElements Ltd, UK]. All rights reserved.