Z \geq 60元素GDR峰附近（{/gamma}，n）反应截面的新经验公式
New Empirical Formula for ({/gamma}, n) reaction cross section near to GDR Peak for elements with Z \geq 60
摘要：
本文提出了一个新的经验公式，它描述了同位素与$Z \geq 60$的$(γ, n)$核反应截面。计算结果得到了TAPIS- 1.6、EMPIRE - 3.2.2核模块程序的支持。入射光子的能量区域选择在巨偶极共振（GDR）峰能量附近。评价的经验数据进行了比较，在实验数据库- EXFOR的可用数据。使用TPENS- 1.6和EMPIRE - 3.2.2产生的数据与实验数据吻合良好。我们已经测试并提出了本新的经验公式的重现性。我们观察到新的经验公式在GDR峰能量附近的重现性与实验数据吻合良好，并对关键核性质：中子，质子和核的原子序数有显着的依赖性。预测了GDR峰附近的核行为，以及GDR峰与同位素性质的关系。本文试图解释某些同位素在$(γ, n)$核反应截面中GDR峰的变形，而TMANS- 1.6和EMPIRE - 3.2.2不能再现这种变形。给出了以前没有测量过的同位素180 W、183 W、202 Pb、203 Pb、204 Pb、205 Pb、231 Pa、232 U、237 U和239 Pu的评价数据。
英文摘要：
A new empirical formula has been developed that describes the $(γ, n)$ nuclear reaction cross sections for the isotopes with $Z \geq 60$. The results were supported by calculations using TALYS - 1.6, EMPIRE - 3.2.2 nuclear modular codes. The energy region for incident photon energy have been selected near to the giant dipole resonance (GDR) peak energy. The evaluated empirical data were compared with available data in the experimental data library - EXFOR. The data produced using TALYS - 1.6 and EMPIRE - 3.2.2 were in good agreement with experimental data. We have tested and presented the reproducibility of the present new empirical formula. We observed the reproducibility of the new empirical formula near to GDR peak energy is in good agreement with the experimental data and remarkable dependency on key nuclei properties: the neutron, proton and atomic number of the nuclei. The behavior of nucleus near GDR peak energy, and dependency of GDR peak on the isotopic nature were predicted. An effort has been made to explain the deformation of the GDR peak in $(γ, n)$ nuclear reaction cross section for some isotopes, which could not reproduce with TALYS - 1.6 and EMPIRE - 3.2.2. The evaluated data have been presented for the isotopes 180W, 183W, 202Pb, 203Pb, 204Pb, 205Pb, 231Pa, 232U, 237U and 239Pu that have no previous measurements.
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