深圳大学学报(理工版)
深圳大學學報(理工版)
심수대학학보(리공판)
JOURNAL OF SHENZHEN UNIVERSITY (SCIENCE & ENGINEERING)
2014年
2期
124-129
,共6页
孙慧斌%钟健%刘嘉健%罗奇%胡世鹏
孫慧斌%鐘健%劉嘉健%囉奇%鬍世鵬
손혜빈%종건%류가건%라기%호세붕
核能谱学%衰变常数%半衰期%化学环境%电子密度%约化电荷%同核异能移%核素 56 Mn
覈能譜學%衰變常數%半衰期%化學環境%電子密度%約化電荷%同覈異能移%覈素 56 Mn
핵능보학%쇠변상수%반쇠기%화학배경%전자밀도%약화전하%동핵이능이%핵소 56 Mn
nuclear spectroscopy%decay constant%half-life%chemical environment%electron density%reduced charge%isomer shift%nuclide manganese 56
利用微型中子源反应堆辐照55 Mn样品,得到放射性核素56 Mn,使用高纯锗探测系统测量56 Mn的能谱,得到56 Mn在不同化合态下的半衰期并进行比较。通过β衰变的费米理论,引入约化电荷计算,对不同化合态下56 Mn的衰变常数与约化电荷进行比对研究。利用同核异能移概念,分析原子价电子的交换和电子云的重叠对56 Mn衰变常数的影响,说明56 Mn半衰期会因为电子密度不同而改变。
利用微型中子源反應堆輻照55 Mn樣品,得到放射性覈素56 Mn,使用高純鍺探測繫統測量56 Mn的能譜,得到56 Mn在不同化閤態下的半衰期併進行比較。通過β衰變的費米理論,引入約化電荷計算,對不同化閤態下56 Mn的衰變常數與約化電荷進行比對研究。利用同覈異能移概唸,分析原子價電子的交換和電子雲的重疊對56 Mn衰變常數的影響,說明56 Mn半衰期會因為電子密度不同而改變。
이용미형중자원반응퇴복조55 Mn양품,득도방사성핵소56 Mn,사용고순타탐측계통측량56 Mn적능보,득도56 Mn재불동화합태하적반쇠기병진행비교。통과β쇠변적비미이론,인입약화전하계산,대불동화합태하56 Mn적쇠변상수여약화전하진행비대연구。이용동핵이능이개념,분석원자개전자적교환화전자운적중첩대56 Mn쇠변상수적영향,설명56 Mn반쇠기회인위전자밀도불동이개변。
The radioactive isotope 56 Mn ( manganese 56 ) was produced by activating the 55 Mn samples in the minia-ture neutron source reactor in Shenzhen University. The energy spectrum of 56 Mn was detected by the high purity ger-manium detector system ( HPGe system) . The half-life of 56 Mn in different chemical environments was studied and compared. The reduced charge was calculated by using the Fermi beta-decay theory,then compared with the change of decay constant of 56 Mn in different chemical environments. The impact of the valence electron exchange and elec-tron cloud overlap to the decay constant of the 56 Mn was analyzed using the theory of the concept of isomer shift. The result is that the half-life of 56 Mn is changed due to the variances of electron density.