[16p-Z34-1~15] CS.1 Code-sharing Session of 2.4 & 7.5

[16p-Z34-12] Analysis of Chlorine-36 in Greenland SE dome ice core

〇Hiroyuki Matsuzaki¹, Miwako Toya¹, Kazuho Horiuchi², Yoshinori Iizuka³ (1.Tokyo Univ., 2.Hirosaki Univ., 3.Hokkaido Univ.)

Keywords:Chlorine-36, Accelerator Mass Spectrometry, ice core

³⁶Cl (Half life: 3.01×10⁵ yr) is long lived radio isotope which is produced by the neutron activation of ³⁵Cl. In 1950’s and 1960’s, vast amount of ³⁶Cl was produced due to a number of atmospheric nuclear bomb testing. In contrast to ¹²⁹I (Half life: 1.57×10⁷ yr), ³⁶Cl is merely released from spent fuel reprocessing plant. The time course profile of ³⁶Cl recorded in ice core will be totally different from ¹²⁹I. In this study, ³⁶Cl in Greenland SE dome ice core was analyzed with precise time resolution and compared with ¹²⁹I recorded.