放ほう射しゃ性せい炭たん素そ

noun

radiocarbon; carbon-14

Scientific term used in archaeology, geology, and environmental science for the radioactive isotope of carbon.

• 放ほう射しゃ性せい炭たん素そ年ねん代だい測そく定てい法ほうは考こう古こ学がくでよく使つかわれる。

  Radiocarbon dating is often used in archaeology.

• 放ほう射しゃ性せい炭たん素その半はん減げん期きは約やく5730年ねんです。

  The half-life of radiocarbon is about 5730 years.