Dworak D, Drabina A, Woźnicka U
H. Niewodniczański Institute of Nuclear Physics Polish Academy of Sciences, Radzikowskiego 152, PL-31-342 Krakow, Poland.
Appl Radiat Isot. 2006 Jul;64(7):844-53. doi: 10.1016/j.apradiso.2006.01.010. Epub 2006 Mar 23.
The semi-empirical method of neutron logging tool calibration developed by Prof. J.A. Czubek uses the real and so-called apparent integral neutron parameters of geological formations. To this end, Czubek proposed a few separated calculation methods commonly based on analytical solutions of the neutron transport problem. A new calculation method for the neutron integral parameters is proposed. Quantities like slowing-down length, diffusion and migration lengths, probability to avoid absorption during slowing down, and thermal neutron absorption cross section can be easily approximated using Monte Carlo simulations. A comparison with the results of the analytical method developed by Czubek has been performed for many cases and the observed differences have been explained.
J.A. 楚贝克教授开发的中子测井仪校准半经验方法使用了地质层的实际和所谓的表观积分中子参数。为此，楚贝克提出了几种通常基于中子输运问题解析解的独立计算方法。本文提出了一种新的中子积分参数计算方法。利用蒙特卡罗模拟可以轻松近似慢化长度、扩散长度和徙动长度、慢化过程中避免吸收的概率以及热中子吸收截面等参数。针对多种情况，将本文方法的结果与楚贝克开发的解析方法的结果进行了比较，并对观察到的差异作出了解释。
