CAJ | 학술논문

研究了稀土产品中227 Ac比活度的测定方法。利用HpGe－γ谱仪，采用无源效率刻度法，通过适当的解谱方法，测定了不同流程的稀土产品中227 Ac的比活度。结果表明：第一，在La2 O3等镧产品中，一般伴随着227 Ac，227 Ac是造成氧化镧产品污染的重要核素；第二，当谱图中351 keV处峰计数高，而609 keV处峰计数低时，可以初步断言227 Ac子体211 Bi 的存在；第三，在快速分析227 Ac时，可以不考虑234 Pa的影响。
연구료희토산품중227 Ac비활도적측정방법。이용HpGe－γ보의，채용무원효솔각도법，통과괄당적해보방법，측정료불동류정적희토산품중227 Ac적비활도。결과표명：제일，재La2 O3등란산품중，일반반수착227 Ac，227 Ac시조성양화란산품오염적중요핵소；제이，당보도중351 keV처봉계수고，이609 keV처봉계수저시，가이초보단언227 Ac자체211 Bi 적존재；제삼，재쾌속분석227 Ac시，가이불고필234 Pa적영향。
The paper studies the determination method of the specific activity of 227 Ac in rare earth products .By the application of sourceless efficiency method on HpGe -γray spectrometer ,we have measured the specific ac-tivity of 227 Ac in rare earth products of different processes through appropriate analysis of the spectrum .The re-sults show that:firstly, lanthanan products , such as lanthana , is generally accompanied by 227 Ac, which con-tributes greatly to the contamination of lanthana .Secondly, the existence of 211Bi,daughter of 227Ac ,could be affirmed when the net counts of the peak at the energy of 351 keV presents high , while thepeak at energy of 609 keV low in the spectrum!Thirdly, the influence of 234 Pa could be ignored in the rapid analysis of 227 Ac.