摘要
人工合成羟基磷酸钙和牙珐琅化石的等温退火实验表明，它们的ＥＳＲ信号的热衰退系一级和二级动力学过程的混合效应。二级衰退常数强烈依赖于温度，粗测其值在２８０℃时为１０－１９ｇ／ｓ量级。二级过程的存在对ＥＳＲ法测早期古人类遗址动物牙化石年龄的影响需进一步研究。
The isothermal annealing experiments on synthetic hydroxyapatite and fossil tooth enamel samples show that the decay of its g=2.0018 line obeys the mixed first- and second-order annealing kinetics. The 2nd-order decay constant depends strongly on temperature and is roughly estimated to be about 10 -19 g/s for hydroxyapatite at 280℃. The effect of the 2nd-order annealing kinetics on ESR dating of ancient (early Pleistocene) fossil tooth enamel samples should be further studied.
出处
《核技术》
EI
CAS
CSCD
北大核心
1997年第8期455-459,共5页
Nuclear Techniques
基金
国家自然科学基金
