HP of Hiroyuki Koura (SHE exp.)

Superheavy Element Experiment

In Japan, combination of a linear accelerator in RIKEN (RILAC) and a gas-filled recoil ion separator (GARIS) was succeeded in high-intensity beam and high-effeciency of separator of beam and synthesied particle, and final they synthesised an isotope ²⁷⁸113 as a first-measured isotopes of the 113th element for the first time.（Institutes in collaboration: Saitama Univ., Niigata Univ., Univ. of Tokyo, JAEA, Tsukuba Univ., IMP (Lanchou, China), IHEP (Beijing, China), Tohoku Univ., Yamagata Univ., and Tokyo Univ. of Sci.）

Papers of co-authors

JPSJ, 73 (2004): Production and Decay Properties of ²⁷²111 and its Daughter Nuclei
JPSJ, 73 (2004): Experiment on the Synthesis of Element 113 in the Reaction ²⁰⁹Bi(⁷⁰Zn, n)²⁷⁸113, (Papers of Editors' Choice, and the 11th Award for Outstanding Papers, Journal of the Physical Society of Japan) Discovery of 113th element (Press Release from RIKEN in Japanese)
JPSJ, 76 (2007): Experiment on Synthesis of an Isotope ²⁷⁷112 by ²⁰⁸Pb + ⁷⁰Zn Reaction, (Papers of Editors' Choice, Journal of the Physical Society of Japan)
JPSJ, 76 (2007): Observation of Second Decay Chain from ²⁷⁸113
JPSJ, 78 (2009): Production and Decay Properties of ²⁶³Hs
JPSJ, 78 (2009): Decay Properties of ²⁶⁶Bh and ²⁶²Db Produced in the ²⁴⁸Cm + ²³Na Reaction
JPSJ, 80 (2011): Production and Decay Properties of ²⁶⁴Hs and ²⁶⁵Hs
JPSJ, 81 (2012): New Result in the Production and Decay of an Isotop, ²⁷⁸113, of the 113th Element, (Papers of Editors' Choice, Journal of the Physical Society of Japan) Search for element 113 concluded at last
After many years of painstaking work, Japanese researchers prove third time's a charm
Nature News & Comments:Element 113 at last?

Japanese researchers claim success after nine years of searching.