Michael Thoennessen

News: November 9, 2015

Two new proton emitters discovered at GSI:

Observation and Spectroscopy of New Proton-Unbound Isotopes 30Ar and 29Cl: An Interplay of Prompt Two-Proton and Sequential Decay by I. Mukha et al.

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Background of the project:

In 2007 we began a project to document the discovery of all isotopes. In contrast to the discovery of a new element, the first observation of a new isotope is not as well defined.

For each isotope we wrote a brief paragraph describing the discovery, including the authors, institution, year and method of discovery. The paragraph includes a quote from the original paper and discusses any possible controversies related to the discovery.

These paragraphs are being published in a series of papers in the journal Atomic Data and Nuclear Data Tables. Links to the references for each element are listed in the table of the discovery papers.

NEW 2014 Ranking:

We recently completed the literature search for new discoveries in the year 2014. 6 new nuclides were reported in 2014. In addition, several assignments were reevaluated. The summary of the changes will be detailed in an upcoming publication.

This increases the total number of nuclides discovered to 3191. 3546 unique authors reported these discoveries in 1527 different papers with 901 different first authors.

Table of top 1000 (co)authors

Table of top 250 first authors

Table of top 25 labs

Table of countries

Table of top 25 journals

In cataloguing these data, an attempt was made to account for the different use of initials and name changes (due to marriage, for example). However, this might not always be correct. Authors are encouraged to check the list of discovery papers which were published in At. Data Nucl. Data Tables. Corrections can be sent by email and would be very welcome.