期刊论文

Tang, Quan

中文

原子能科学技术

1000-6931

2014

48

12

2381-2386

10.7538/yzk.2014.48.12.2381

国家自然科学基金资助项目（11275094）；

本校为第一且通讯机构

对利用从铀矿石中提取得到的~(227)Ac制备的固体~(219)Rn源进行了γ能谱分析,确定了~(227)Ac的4个子体核素~(227)Th、~(223)Ra、~(219)Rn和~(211)Bi的活度,并分析了能对~(219)Rn造成干扰的~(222)Rn、~(220)Rn母体核素~(226)Ra、 ~(224) Ra的活度。待~(227)Ac及其子体达到放射性平衡后,通过测量~(227)Th的235.97、256.25keV,~(223)Ra的154.21keV,~(219)Rn的401.81keV,~(211)Bi的351.059keV共5条γ射线,最终确定固体~(219)Rn源中~(227)Th、 ~(223)Ra、~(219)Rn和~(211)Bi的活度为(1 069±3)、(1 079±5)、(1 095±13)、(1 096±14)和(11 089±4)Bq,固体~(219)Rn源的平均活度为(1 093±8)Bq;通过测...

Radioactivity purity of the solid 219Rn source made using 227Ac extracted from uranium ore were determined by γ-spectrometry. The activities of 227Th, 223Ra, 219Rn and 211Bi produced by the decay of 227Ac and the contents of 226Ra, 224Ra which generates 222Rn, 220Rn to affect the purity of actinide in this source were analyzed after 227Ac in radioactive equilibrium with its daughter nuclides. The γ-ray energy used for the determination of these daughter nuclides of 227Ac are 235.97, 256.25 keV for 227Th, 154.21 keV for 223Ra, 401.81 keV for 219Rn, and 351.059 keV for 211Bi. Through...