Congruence of decay chains of elements 113, 115, and 117

Ulrika Forsberg, Claes Fahlander, Dirk Rudolph

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review


Superheavy element research relies heavily on the detection of correlated decay chains. When several chains have been detected, it is natural to ask whether they form one congruent set, or whether they should be further divided into subsets. To statistically assess the congruence between the chains in a data set, we developed a procedure to calculate a Figure-of-Merit for low-number statistics. In this work, the method is applied to the world data set of odd-Z superheavy nuclei with Z ≥ 113. Some of the postulated sets of chains are found to be congruent, while others are not. The findings are of relevance for the IUPAC and IUPAP approvals of the new elements Z = 113, 115, and 117.
Original languageEnglish
Title of host publicationNobel Symposium NS 160 – Chemistry and Physics of Heavy and Superheavy Elements
Subtitle of host publicationEPJ Web of Conferences
EditorsDirk Rudolph
PublisherEDP Sciences
Number of pages7
ISBN (Electronic)978-2-7598-9011-8
Publication statusPublished - 2016 Dec 1
EventNobel Symposium NS160: Chemistry and Physics of Heavy and Superheavy Elements - Bäckaskog Castle, Kristianstad, Sweden
Duration: 2016 May 292016 Jun 3
Conference number: 160


ConferenceNobel Symposium NS160
Abbreviated titleNS160
CityBäckaskog Castle, Kristianstad
Internet address

Subject classification (UKÄ)

  • Subatomic Physics

Free keywords

  • superheavy elements
  • decay chain correlations


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