Changes of decay rates of radioactive ^(111)In and ^(32)P induced by mechanic motion  

作　　者：HE YuJian1,QI Fei2 & QI ShengChu3 1 College of Chemistry and Chemical Engineering,Graduate University of Chinese Academy of Sciences,Beijing 100049,China 2 No. 1,Gravenhurst Court,Gaithersburg,Md 20878,USA 3 Department of Applied Chemistry,Peking University,Beijing 100871,China 

出　　处：《Science China Chemistry》2007年第2期170-174,共5页中国科学（化学英文版）

基　　金：This work was partially supported by the National Natural Science Foundation of China (Grant No. 20571085);Grant of the President of the Chinese Academy of Sciences (0521021T04);Chinese Academy of Sciences (KJCX3.SYW.N12);2005/2006 USA Li’s Foundation Merit Prize grant, Ministry of Education of China (0519061A90);Graduate University of Chinese Academy of Sciences (GUCAS) Grant (R 1003)

摘　　要：The changes of decay rates of radionuclide 111In(electron capture) and 32P(β decay) induced by exter-nal mechanic motion are studied. The results indicate that,in the external circular rotation in clockwise and anticlockwise centrifuge on Northern Hemisphere(radius 8 cm,2000 r/min) ,the half life of 111In compared with the referred(2.83 d) is decreased at 2.83% and increased at 1.77%,respectively;the half life of 32P compared with the referred(14.29 d) is decreased at 3.78% and increased at 1.75%,respec-tively. When the clockwise and anticlockwise rotations increase to 4000 r/min,the half life of 111In is decreased at 11.31% and increased at 6.36%,respectively;the half life of 32P is decreased at 10.08% and increased at 4.34%,respectively. When the circular rotation is removed,the decay rates of 111In and 32P return back to the referred,respectively. It is found that the external circular rotations in clockwise and anticlockwise centrifuge selectively increased and decreased the decay rates of 111In and 32P,respec-tively,and the effects are strongly dependent on the strength of circular rotation. It is suggested that these effects may be caused by the chiral interaction.The changes of decay rates of radionuclide 111In(electron capture) and 32P(β decay) induced by exter-nal mechanic motion are studied. The results indicate that,in the external circular rotation in clockwise and anticlockwise centrifuge on Northern Hemisphere(radius 8 cm,2000 r/min) ,the half life of 111In compared with the referred(2.83 d) is decreased at 2.83% and increased at 1.77%,respectively;the half life of 32P compared with the referred(14.29 d) is decreased at 3.78% and increased at 1.75%,respec-tively. When the clockwise and anticlockwise rotations increase to 4000 r/min,the half life of 111In is decreased at 11.31% and increased at 6.36%,respectively;the half life of 32P is decreased at 10.08% and increased at 4.34%,respectively. When the circular rotation is removed,the decay rates of 111In and 32P return back to the referred,respectively. It is found that the external circular rotations in clockwise and anticlockwise centrifuge selectively increased and decreased the decay rates of 111In and 32P,respec-tively,and the effects are strongly dependent on the strength of circular rotation. It is suggested that these effects may be caused by the chiral interaction.

关 键 词：circular rotation HELICAL MOTION 111In 32P DECAY rate CHIRALITY 

分 类 号：O615[理学—无机化学]