@article{oai:nagoya.repo.nii.ac.jp:00011672,
 author = {植村, 恒仁 and Uemura, Tsunehito and 宮原, ひろ子 and Miyahara, Hiroko and 村木, 綏 and Muraki, Yasushi and 増田, 公明 and Masuda, Kimiaki},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {It is known that the periods when solar activity was extremely weak (so-called grand minima) existed several times in the last 1000 years. It is reported by Kocharov et al. that the solar activity periodicity during the Maunder minimum was not the 11 year variation but the 22 year variation. What does the cycle of 22 years mean? Does the periodicity of 22 years exist also in the minima other than the Maunder minimum? We have investigated the solar activity of the Sporer minimum, which preceded the Maunder minimum, in order to understand the periodicity of solar activity during the minima. Both the liquid scintillation method and the accelerator mass spectrometry method (AMS method) were used for measuring the ^<14>C concentration in annual tree rings., 第14回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13 (2001)年度)報告},
 pages = {110--117},
 title = {シュペーラー極小期における太陽活動研究 : 年輪中<14>^C濃度測定},
 volume = {13},
 year = {2002}
}