🔬 Discovery

Nihonium

Nihonio (Nh, Z=113)

Date
2004 · confidence high
Place
RIKEN, Wako, Saitama, Japan
Credited to
Kosuke Morita and the RIKEN team
People
👤 Kosuke Morita1957–
Field
Matter & energy

⚠️ Disputed: the sources disagree.

What was discovered

RIKEN produced the first atom of Nh-278 in 2004 by fusing zinc-70 with bismuth-209, and the decisive third atom in 2012; the Dubna-Livermore collaboration had observed it in 2003 as a daughter of moscovium.

The IUPAC awarded priority to RIKEN in 2015 over Dubna-Livermore.

What it led to

  • First element discovered in Asia
  • Recognition of the cold fusion method at its limit
  • Named after Japan (Nihon)

Built on

  • RILAC accelerator
  • Cold fusion

Made possible

  • RIKEN's GARIS separator

Links

Sources✓ verified 2026-09-25