通过用氦-3离子活化法测定人牙中的碳含量。
Carbon determination in human teeth by activation with He-3 ions.
作者信息
Chaudhri M A, Crawford A C
机构信息
Department of Medical Physics, Austin Hospital, Melbourne, Australia.
出版信息
Biol Trace Elem Res. 1990 Jul-Dec;26-27:521-7. doi: 10.1007/BF02992708.
A nuclear analytical method, involving activation with 3He ions, was developed to determine carbon content in human teeth with well-documented histories. The tooth samples were irradiated with 2.7-MeV3He particles at 50 nA intensity, and the activity of 14O induced through the reaction 12C(3He, n)14O, determined by counting the 2.31-MeV gammas. Different dental hard tissues were studied separately. A solid piece of silver steel, the carbon content of which was accurately determined by chemical means, was used as the standard. The carbon content in different teeth varied from 4-7%. The overall experimental accuracy was better than 4.5%.
开发了一种核分析方法，该方法涉及用³He离子进行活化，以测定具有详细记录历史的人类牙齿中的碳含量。牙齿样本用强度为50 nA的2.7 MeV³He粒子进行辐照，并通过反应¹²C(³He, n)¹⁴O诱导产生¹⁴O的活度，通过对2.31 MeV的伽马射线进行计数来确定。对不同的牙齿硬组织分别进行了研究。使用一块碳含量通过化学方法精确测定的银钢作为标准。不同牙齿中的碳含量在4%至7%之间变化。总体实验精度优于4.5%。
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