New Result on the Production of 277Cn by the 208Pb + 70Zn Reaction

• Published in: Journal of the Physical Society of Japan 2013-02, Vol.82 (2), p.024202-024202-5
• Main Authors: Sumita, Takayuki, Morimoto, Kouji, Kaji, Daiya, Haba, Hiromitsu, Ozeki, Kazutaka, Sakai, Ryutaro, Yoneda, Akira, Yoshida, Atsushi, Hasebe, Hiroo, Katori, Kenji, Sato, Nozomi, Wakabayashi, Yasuo, Mitsuoka, Shin-ichi, Goto, Shin-ichi, Murakami, Masashi, Kariya, Yoshiki, Tokanai, Fuyuki, Mayama, Keita, Takeyama, Mirei, Moriya, Toru, Ideguchi, Eiji, Yamaguchi, Takayuki, Kikunaga, Hidetoshi, Chiba, Junsei, Morita, Kosuke
• Format: Article
• Language: English
• ISSN: 0031-9015; 1347-4073
• DOI: 10.7566/JPSJ.82.024202

The production and decay properties of an isotope of the 112th element, 277 Cn, were investigated using a gas-filled recoil ion separator by irradiation of 208 Pb targets with 70 Zn beams at 347.5, 351.5, and 355.5 MeV. The excitation function for this reaction was measured for the first time. We observed one decay event assigned to the decay of 277 Cn at the beam energy of 351.5 MeV. The measured production cross section was 0.078 +0.179 pb. The present result gives improved half-lives of 0.61 +0.46 and 0.19 +0.14 ms for 277 Cn and 273 Ds, respectively. At the other energies, no event was observed. The measured upper cross section limits were 0.25 and 0.15 pb at the beam energies of 347.5 and 355.5 MeV, respectively.