Identification of 253Md
Identification of 253Md
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253Md的鉴定
DOI：
10.1524/ract.1992.56.1.1
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
D. Hoffman
中科院分区：
文献类型：
--
作者：
B. Kadkhodayan;R. Henderson;H. Hall;J. Leyba;K. Czerwinski;S. Kreek;N. J. Hannink;K. Gregorich;D. Lee;M. Nurmia;D. Hoffman
我们已经测量了新同位素^“^Md的半衰期和生产截面，该同位素是通过^”"Ani（“C，3 n）反应产生的。用α-羟基异丁酸铵从阳离子交换树脂柱上洗脱，实现了Md与其它活性的分离。实验以不同的辐照时间间隔进行，但化学分离总是在辐照结束后完全相同的时间长度开始和结束。将具有相同辐照长度的所有分离物组合并分析3.0-d“F m子体和20.47-d“E s（^"M d的孙女）的生长和衰变。每一级分中的^"E s的量取决于每次照射的长度和^" M d的半衰期。照射时间的增加将导致新同位素^“^Md的量相应增加，从而导致产生的^”^Es的量相应增加，前提是照射时间与^“^Md的半衰期相比不是很长。以这种方式，Md半衰期估计为约6分钟，产生截面为50 nb量级。
Wc have measured the half-life and production cross section of the new isotope ^ '^Md, produced via the ^ ' ' 'Ani ("C,3n) reaction. Isolation of Md from other activities was accomphshed using elution with ammonium a-hydroxyisobutyrate f rom a cation exchange resin column. Experiments were performed with different irradiation time intervals, but the chemical Separation always began and ended at exactly the same length of time after the end of irradiation. All separations with the same irradiation lengths were combined and analyzed for growth and decay of the 3.0-d " ' F m daughter and 20.47-d " ' E s , granddaughter of ^ ' ' M d . The amount of ^ ' ' E s in each fraction depends on the length of each irradiation and the ^ ' ' M d half-life. An increase in the length of irradiation will cause a corresponding increase in the amount of the new isotope ^ '^Md and hence, in the amount of ^ '^Es produced, provided the length of irradiations are not very long compared to the half-life of ^ " M d . In this way, the Md half-life was estimated to be about 6 minutes with a production cross section of the order of 50 nb.