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曲率能对热力学驱动力的影响

朱巧迪,  迟萌,  李京珂,  李佳阳,  毛英臣

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文章导航 > 原子核物理评论  > 2018 >  35(4): 555-560
朱巧迪, 迟萌, 李京珂, 李佳阳, 毛英臣. 曲率能对热力学驱动力的影响[J]. 原子核物理评论, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
引用本文: 朱巧迪, 迟萌, 李京珂, 李佳阳, 毛英臣. 曲率能对热力学驱动力的影响[J]. 原子核物理评论, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
shu
ZHU Qiaodi, CHI Meng, LI Jingke, LI Jiayang, MAO Yingchen. Influence of Curvature Energy on Thermodynamic Driving Force[J]. Nuclear Physics Review, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
Citation: ZHU Qiaodi, CHI Meng, LI Jingke, LI Jiayang, MAO Yingchen. Influence of Curvature Energy on Thermodynamic Driving Force[J]. Nuclear Physics Review, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
shu

曲率能对热力学驱动力的影响

doi: 10.11804/NuclPhysRev.35.04.555

  • 辽宁师范大学物理与电子技术学院, 辽宁 大连 116029

基金项目: 国家自然科学基金资助项目（11447019，11505724，11375080）
详细信息
    作者简介:

    朱巧迪(1993-),女,辽宁鞍山人,硕士研究生,从事原子核物理研究;E-mail:qiaodizhu2018@163.com

    通讯作者: 毛英臣,E-mail:myc@lnnu.edu.cn

  • 中图分类号: O571.53

Influence of Curvature Energy on Thermodynamic Driving Force

  • School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, Liaoning, China

Funds: National Natural Science Foundation of China (11447019, 11505724, 11375080)

  • 摘要: 为了研究曲率能对核裂变热力学驱动力（TDF）的影响，首先利用包含曲率能的截断版小液滴模型计算了200Pb和224Th的位垒和熵垒，对比液滴模型的计算结果表明：曲率能未改变224Th的位垒鞍点，却将200Pb的位垒鞍点向后推移。能级密度参数的形变关系越强则两系统的熵垒鞍点越靠近基态。为了进一步探究曲率能如何通过位势和熵势影响TDF，以断前中子多重性（PNM）为探针，通过两种方案进行了模拟，结果表明：曲率能降低了两系统的位势驱动力，而增强了其熵势驱动力。结合PNM的计算表明，前一种效应要比后一种效应明显，因此曲率能总体减弱了200Pb和224Th的TDF，进而延缓了两系统的核裂变进程。


    In order to study the effect of curvature energy on the thermodynamic driving force (TDF) of nuclear fission, the potential and entropy barrier of 200Pb and 224Th systems are calculated by using the truncated droplet model including curvature energy, respectively. Compared with the liquid drop model, the results show that curvature energy does not affect the saddle point of 224Th, but pushes the saddle point of 200Pb backwards the ground state. The stronger the deformation dependence of the level density parameter is, the closer the saddle point of entropy barrier for these systems is to the ground state. In order to further investigate how curvature energy affects TDF through nuclear potential and entropy, respectively, the prescission neutron multiplicity (PNM) is selected as the probe, some simulations based on two schemes are carried out. The results show that curvature energy reduces the potential driving force of 200Pb and 224Th, and enhances the entropy potential driving force. Combined with the calculations and analyses of PNM, the former effect is more obvious than the latter, so curvature energy weakens TDF of two systems on whole, thus delaying the nuclear fission process of two systems.
    Abstract: In order to study the effect of curvature energy on the thermodynamic driving force (TDF) of nuclear fission, the potential and entropy barrier of 200Pb and 224Th systems are calculated by using the truncated droplet model including curvature energy, respectively. Compared with the liquid drop model, the results show that curvature energy does not affect the saddle point of 224Th, but pushes the saddle point of 200Pb backwards the ground state. The stronger the deformation dependence of the level density parameter is, the closer the saddle point of entropy barrier for these systems is to the ground state. In order to further investigate how curvature energy affects TDF through nuclear potential and entropy, respectively, the prescission neutron multiplicity (PNM) is selected as the probe, some simulations based on two schemes are carried out. The results show that curvature energy reduces the potential driving force of 200Pb and 224Th, and enhances the entropy potential driving force. Combined with the calculations and analyses of PNM, the former effect is more obvious than the latter, so curvature energy weakens TDF of two systems on whole, thus delaying the nuclear fission process of two systems.
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出版历程
  • 收稿日期:  2018-10-23
  • 修回日期:  2018-11-21
  • 刊出日期:  2020-05-03

曲率能对热力学驱动力的影响

doi: 10.11804/NuclPhysRev.35.04.555
  • 辽宁师范大学物理与电子技术学院, 辽宁 大连 116029
    • 基金项目:  国家自然科学基金资助项目（11447019，11505724，11375080）
    作者简介:

    朱巧迪(1993-),女,辽宁鞍山人,硕士研究生,从事原子核物理研究;E-mail:qiaodizhu2018@163.com

    通讯作者: 毛英臣,E-mail:myc@lnnu.edu.cn
  • 收稿日期: 2018-10-23
  • 修回日期: 2018-11-21
  • 刊出日期: 2020-05-03

  • 中图分类号: O571.53

摘要: 为了研究曲率能对核裂变热力学驱动力（TDF）的影响，首先利用包含曲率能的截断版小液滴模型计算了200Pb和224Th的位垒和熵垒，对比液滴模型的计算结果表明：曲率能未改变224Th的位垒鞍点，却将200Pb的位垒鞍点向后推移。能级密度参数的形变关系越强则两系统的熵垒鞍点越靠近基态。为了进一步探究曲率能如何通过位势和熵势影响TDF，以断前中子多重性（PNM）为探针，通过两种方案进行了模拟，结果表明：曲率能降低了两系统的位势驱动力，而增强了其熵势驱动力。结合PNM的计算表明，前一种效应要比后一种效应明显，因此曲率能总体减弱了200Pb和224Th的TDF，进而延缓了两系统的核裂变进程。


In order to study the effect of curvature energy on the thermodynamic driving force (TDF) of nuclear fission, the potential and entropy barrier of 200Pb and 224Th systems are calculated by using the truncated droplet model including curvature energy, respectively. Compared with the liquid drop model, the results show that curvature energy does not affect the saddle point of 224Th, but pushes the saddle point of 200Pb backwards the ground state. The stronger the deformation dependence of the level density parameter is, the closer the saddle point of entropy barrier for these systems is to the ground state. In order to further investigate how curvature energy affects TDF through nuclear potential and entropy, respectively, the prescission neutron multiplicity (PNM) is selected as the probe, some simulations based on two schemes are carried out. The results show that curvature energy reduces the potential driving force of 200Pb and 224Th, and enhances the entropy potential driving force. Combined with the calculations and analyses of PNM, the former effect is more obvious than the latter, so curvature energy weakens TDF of two systems on whole, thus delaying the nuclear fission process of two systems.

English Abstract

朱巧迪, 迟萌, 李京珂, 李佳阳, 毛英臣. 曲率能对热力学驱动力的影响[J]. 原子核物理评论, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
引用本文: 朱巧迪, 迟萌, 李京珂, 李佳阳, 毛英臣. 曲率能对热力学驱动力的影响[J]. 原子核物理评论, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
shu
ZHU Qiaodi, CHI Meng, LI Jingke, LI Jiayang, MAO Yingchen. Influence of Curvature Energy on Thermodynamic Driving Force[J]. Nuclear Physics Review, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
Citation: ZHU Qiaodi, CHI Meng, LI Jingke, LI Jiayang, MAO Yingchen. Influence of Curvature Energy on Thermodynamic Driving Force[J]. Nuclear Physics Review, 2018, 35(4): 555-560. doi: 10.11804/NuclPhysRev.35.04.555
shu

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