演題概要

ポスター発表

第3日 5月20日(金)  ポスター会場(月光)

レーザーポストイオン化SNMSを用いたpresolar SiCの同位体分析

(1阪大院理2阪大産学連携)
o宮晃平1寺田健太郎1薮田ひかる1河井洋輔1松田貴博1豊田岐聡1石原盛男1青木順1中村亮介2

For unveiling nucleosynthesis during stellar evolution, in-situ isotopic analyses of presolar grains have made important roles. Then, we have been developing a new mass spectrometer, Secondary Neutrals Mass Spectrometer (SNMS) with a femto-second laser. Post-ionization technique using laser system attains higher secondary ion yields by more than 10000 times compared with those of no laser system. Moreover by leading sputtered secondary ions into Multi-Turn Time of Flight Mass Spectrometer (MULTUM), we have succeeded high mass-resolution isotopic analysis of multi elements at the same time. Using this method, we have been exploring isotopic ratios of terrestrial SiCs and/or presolar SiCs recovered from Murchison meteorite. At the conference, we'll discuss on our recent progresses.