摘要
用第六届国际裂变径速测定地质年代学术讨论会推荐的锆石、磷灰石和榍石年龄标样和ＳＲＭ６１２铀玻璃刻度了Ｚｅｔａ值。三种矿物的Ｚｅｔａ值差异不大，与加权平均３３９．２±６．６（２σ）接近。将Ｃｏ箔法测得的Φ值与用自行刻度的ｂ值测标准铀玻璃在白云母上诱发径迹密度计算得到的Φ值进行了比较．利用外探测器方法测定了裂变径迹定年国际标样中三种锆石和两种磷灰石的年龄，其结果与推荐的参考年龄在误差范围内一致．
In this paper several age standards (including three zircon, two apatite and one sphene) have been used for Zeta determination against SRM612. No significant difference of three minerals is found. A single-weighted mean Zeta constant is given as 339.2±6.6(2σ).The thermal neutron flux calculated from σ Φ is compared with that determined from Co foil. The ages of zircon and apatite are determined using the calibrated constant b and the track density by a dosimeter glass. The results of 27.7±0.8Ma for FCT,16.1±0.5Ma for MB, 60.0±3.0Ma for TR and 30.8± 1.9Ma for Durango are consistent with the reference ages within the range of error.
出处
《核技术》
CAS
CSCD
北大核心
1996年第10期629-631,共3页
Nuclear Techniques
基金
国家自然科学基金
