シュペーラー極小期の太陽活動研究を目指して Study of Solar Activity in Sporer minimum by radiocarbon 14
名古屋大学タンデトロン加速器質量分析計シンポジウム(平成8年(1996年度)報告 ｢第2世代タンデトロン加速器質量分析計(加速器年代測定システム)による高精度･高分解能14C年代測定の利用分野･方法の開拓｣ Proceedings of Symposium on Researches with a Tandetron Accelerator Mass Spectrometer at Nagoya University in 1996"Studies on New Fields and New Methods of Applications of High-Precision and High-Accuracy Radiocarbon Dating with a Second-Generation Tandetron Accelerator Mass Spectrometer at Nagoya University"日時:1997 (平成9)年3月10日 場所:名古屋大学年代測定資料研究センター古川総合研究資料館講義室
We invited Prof. K. Arslanov from St. Petersburg University, Russia last December. He constructed a system for synthesizing benzene to measure radiocarbon 14 in tree rings using the β counting method. There are two characteristics in his method. One is that we can make a liquid scintillator without making CO_2. The other feature is the use of a special vanadium catalyst invented by himself. With his patented method we can make benzene at room temperature and immediately obtain 10ml benzene. We have then developed a counting detector of β-rays from the liquid scintillator. We will be able to measure radiocarbon 14 from tree rings in Maunder minimum with use of this method with an accuracy of 0.3%. However, since it is quite hard to obtain enough tree rings in the Sporer minimum, we are also considering the measurement of radiocarbon 14 abundance in tree rings based on AMS method.
名古屋大学加速器質量分析計業績報告書 8, 24-27, 1997-03