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36Cl是一种长寿命放射性核素,它广泛存在于大气圈和岩石圈中. 通过测定岩石样品中的36Cl含量,可以计算岩石的侵蚀速率以及暴露年龄. 目前,加速器质谱是测量36Cl的唯一有效方法. 本文对36Cl的加速器质谱(AMS)测量方法进行了研究,并通过36Cl的 AMS测量计算出了北京石花洞地区灰岩表面的侵蚀速率,其数值为(1.33±0.28)×10-5 m·a-1.
36Cl is a long-lived radionuclide that is found in the atmosphere and in the lithosphere and can be used to calculate rock erosion rates and exposure ages by measuring 36Cl in rock samples. At present, accelerator mass spectrometry is the only effective (AMS) method of 36Cl was studied in this paper, and the erosion rate of limestone surface in Shihuadong area was calculated by AMS measurement of 36Cl with the value of (1.33 ± 0.28) × 10-5 m · A-1.