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引用次数: 46
摘要
用一套矿物年龄标准的裂变径迹和K-Ar年龄进行比较，计算了238U自发裂变衰变常数238λf。在Herald反应堆内均匀通量分布的辐照设施中，用两个裂变径迹玻璃对一系列Co线中子通量监测器进行校准，监测中子剂量。实验室间比较表明，这些校准与美国国家标准局进行的标准剂量测量非常接近。238λf的值为(7±0.28)× 10-17 year -1。
A comparison of fission track and K-Ar ages for a set of mineral age standards has been used to evaluate the 238U spontaneous fission decay constant, 238λf. Neutron doses were monitored with two fission-track glasses calibrated against a series of Co wire neutron flux monitors in an irradiation facility with a uniform flux distribution in the Herald reactor. An interlaboratory comparison shows that these calibrations compare closely with standard dose measurements made at the U.S. National Bureau of Standards. A value of (7·±0·28) × 10-17 yr-1 was obtained for 238λf.
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