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Theoretical description of octupole deformed band in neutron-rich even-even Ba isotopes
octupole deformed band shell model parity splitting and inversion
2009/8/14
The reflection asymmetric shell model (RASM) has been applied to describe the
alternating-parity rotational bands in neutron-rich 142,144,146,148Ba octupole nuclei. The calculated rotational bands ar...
Ba(n,x)134Cs,134Ba(n,2n)133Ba,140Ce(n,2n)139Ce,142Ce(n,2n)141)Ce和23Na(n,2n)22Na反应截面的测量
活化方法 反应截面 (n,x)(n,2n)反应
2009/7/9
用中子活化法相对于54Fe(n,P)54Mn反应,在13.50—14.80MeV中子能区测量了Ba(n,x)134Cs,134Ba(n,2n)133Ba,140Ce(n,2n)139Ce,142Ce(n,2n)141Ce和23Na(n,2n)22Na的反应截面.并将所测的结果和其他作者的结果进行了比较,中子能量是用90Zr(n,2n)89m+gZr反应和93Nb(n,2n)92mNb反应截面比法测...
Ba同位素的截面测量
中能核–核碰撞 放射化学分离 Ba同位素截面 双峰分布
2009/6/4
用60MeV/u18O离子轰击天然铀靶,通过238U(18O,X)反应产生钡的放射性同位素.使用放射化学分离方法从被照射过的铀靶中分离出Ba,用HPGeγ射线探测器测量Ba样品的γ射线谱,经对所得时间累计谱的处理和分析得到了Ba同位素的产生截面,并观察到Ba同位素分布中的双峰分布现象.
Homogeneous partition coefficients (D) for Ra and Ba in calcite were determined from coprecipitation experiments using the Continuous Addition Method (CAM). The D-values derived for Ra and Ba are:
DR...