@article{oai:kanazawa-u.repo.nii.ac.jp:00010943, author = {横山, 明彦 and Haba, Hiromitsu and Kaji, Daiya and Kasamatsu, Yoshitaka and Kikunaga, Hidetoshi and Komori, Yukiko and Kudou, Yuki and Morimoto, Kouji and Morita, Kosuke and Ooe, Kazuhiro and Ozeki, Kazutaka and Sato, Nozomi and Shinohara, Atsushi and Toyoshima, Atsushi and Yokoyama, Akihiko and Yoneda, Akira and Yoshimura, Takashi}, journal = {AIP Conference Proceedings}, month = {Jan}, note = {A gas-jet transport system has been coupled to the RIKEN gas-filled recoil ion separator GARIS to startup superheavy element (SHE) chemistry at RIKEN. The performance of the system was appraised using an isotope of element 104, 261Rf, produced in the 248Cm(18O,5n) 261Rf reaction. Alpha-particles of 261Rf separated with GARIS and extracted to a chemistry laboratory were successfully identified with a rotating wheel apparatus for α spectrometry. The setting parameters such as the magnetic field of the separator and the gas-jet conditions were optimized. The present results suggest that the GARIS/gas-jet system is a promising approach for exploring new frontiers in SHE chemistry: (i) the background radioactivities of unwanted reaction products are strongly suppressed, (ii) the intense beam is absent in the gas-jet chamber and hence high gas-jet efficiency is achieved, and (iii) the beam-free condition also allows for investigations of new chemical systems. © 2010 American Institute of Physics., 金沢大学理工研究域物質化学系}, pages = {356--362}, title = {Superheavy element nuclear chemistry at RIKEN}, volume = {1235}, year = {2010} }