Issue |
EPJ Web Conf.
Volume 131, 2016
Nobel Symposium NS 160 – Chemistry and Physics of Heavy and Superheavy Elements
|
|
---|---|---|
Article Number | 06002 | |
Number of page(s) | 10 | |
Section | Discovery Aspects | |
DOI | https://doi.org/10.1051/epjconf/201613106002 | |
Published online | 01 December 2016 |
https://doi.org/10.1051/epjconf/201613106002
How good are superheavy element Z and A assignments?
Lawrence Berkeley National Laboratory, Berkeley, CA, USA
a e-mail: kegregorich@lbl.gov
Published online: 1 December 2016
Proton number, Z, and mass number,A, assignments for newly discovered heavy element nuclides have historically been made by observing α decay to a daughter with well-established Z and A, and then observing the well-know decay of that daughter. For all of the new superheavy element isotopes observed in 48Ca irradiations of actinide targets, this correlation technique has not been possible, because the α-decay chains end in spontaneous fission of previously unknown isotopes. Consequently, Z and A assignments have been made by less-direct means. The superheavy element Z and A assignment methods are summarized, and possibilities for how they may be incorrect are explored. While it is highly likely that most of the superheavy element Z and A assignments are correct, there is a real need for a direct proof.
© The Authors, published by EDP Sciences 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.