Names recommended for elements 115, 117 and 118

June 08, 2016

The International Union of Pure and Applied Chemistry (IUPAC) opened a public comment period Wednesday for the recommended names of elements 115, 117 and 118.

Lawrence Livermore National Laboratory and the Joint Institute for Nuclear Research in Dubna, Russia (JINR) were credited late last year for discovering elements 115 and 118. LLNL, JINR, Oak Ridge National Laboratory (ORNL), Vanderbilt University and the University of Nevada, Las Vegas were credited with the discovery of element 117.

Moscovium (Mc) is provisionally recommended for element 115 in recognition of the Moscow region and honoring the ancient Russian land that is home to JINR. Moscow is the capital of the region.

Tennessine (Ts) is proposed for element 117, recognizing the contribution of Tennessee research centers ORNL, Vanderbilt and the University of Tennessee to superheavy element research.

The provisional name for element 118 is Oganesson (Og) in recognition of the pioneering contributions of Yuri Oganessian to superheavy element research. Oganessian's vision and determination created this opportunity for the significant expansion of the periodic table and knowledge of superheavy nuclei.

The provisional names will undergo a statutory period for public review before the names and symbols can be finally approved by the IUPAC Council -- likely later this year.

"I'm proud of all of the hard work that this group has done over the years performing these experiments," said Dawn Shaughnessy," LLNL's principal investigator for the Heavy Element Group. "It's a huge accomplishment for the entire group that we are recognized for our efforts in accomplishing these highly difficult experiments and for the years of work it takes to successfully create a new chemical element."

LLNL teamed with JINR in 2004 to discover elements 113 and 115 (Japan was credited with the discovery of element 113). LLNL worked again with JINR in 2006 to discover element 118. The LLNL/JINR team then jointly worked with researchers from the Research Institute for Advanced Reactors (Dimitrovgrad), ORNL, Vanderbilt University and the University of Nevada, Las Vegas, to discover element 117 in 2010.

This discovery brings the total to five new elements reported by the Dubna-Livermore team (114, 115, 116, 117 and 118, the heaviest element to date).

The new elements and nuclei will complete the seventh row of the periodic table, and provides evidence for the long sought "island of stability" for superheavy elements. Two members of the team, JINR and LLNL, were previously credited with the discovery of elements 114 (flerovium) and 116 (livermorium).

The concept of the "island of stability" was originally proposed in the 1960s. It predicts increased stability for superheavy nuclei at higher neutron and proton numbers. The new nuclei produced in this research exhibit substantially increased lifetimes consistent with approaching the island.

These new elements were discovered using the "hot fusion" approach, developed and implemented by Oganessian at JINR. This approach involves heavy ion reactions of an intense, high-energy calcium beam on rare actinide targets including berkelium and californium at the Dubna Gas-Filled Recoil Separator.
Founded in 1952, Lawrence Livermore National Laboratory is a national security laboratory, with a mission to ensure national security and apply science and technology to the important issues of our time. Lawrence Livermore National Laboratory is managed by Lawrence Livermore National Security, LLC for the U.S. Department of Energy's National Nuclear Security Administration.

DOE/Lawrence Livermore National Laboratory

Related Nuclei Articles from Brightsurf:

The new heavy isotope mendelevium-244 and a puzzling short-lived fission activity
A team of scientists from GSI Helmholtzzentrum fuer Schwerionenforschung Darmstadt, University Mainz (JGU), Helmholtz Institute Mainz (HIM) and the University of Jyvaeskylae, Finland, has provided new insights into the fission processes in exotic nuclei and for this, has produced the hitherto unknown nucleus mendelevium-244.

Physicists study mirror nuclei for precision theory test
A precision measurement of helium and hydrogen mirror isotopes reveals new questions in understanding of nuclear structure.

Capturing the coordinated dance between electrons and nuclei in a light-excited molecule
Using SLAC's high-speed 'electron camera,' scientists simultaneously captured the movements of electrons and nuclei in a light-excited molecule.

X-ray imaging of atomic nuclei
Optically imaging atomic nuclei is a long-sought goal for scientific and applied research, but it has never been realized so far.

MSU professor collaborates with international colleagues in Review of Modern Physics journal article
MSU Professor Alexandra Gade collaborated with international colleagues for a Review of Modern Physics article about shell evolution of exotic nuclei.

New method described for quantifying antisense oligonucleotides in nuclei
A novel method uses subcellular fractionation to quantify label-free antisense oligonucleotides (AONs)- designed to silence targeted genes - that have crossed into the nucleus of a cell, where they can exert their effects.

Deuteron-like heavy dibaryons -- a step towards finding exotic nuclei
Using supercomputer, TIFR's physicists have predicted the existence of deuteron-like exotic nuclei for the first time as well as provided their masses precisely.

Nuclear architecture: What organizes the genome in the nucleus?
Spatial separation of active from inactive fractions of the genome in the cell nucleus is crucial for gene expression control.

'Fire streaks' ever more real in the collisions of atomic nuclei and protons
Collisions of lead nuclei take place under extreme physical conditions.

Nuclear 'magic numbers' collapse beyond the doubly magic nickel 78
Scientists have demonstrated that nickel 78, a neutron-rich 'doubly magic' isotope of nickel with 28 protons and 50 neutrons, still maintains a spherical shape that allows it to be relatively stable despite the large imbalance in the number of protons and neutrons.

Read More: Nuclei News and Nuclei Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to