作者： Liu, Hong-Ming;Zou, You-Tian;Pan, Xiao;Chen, Jiu-Long;He, Biao;...

期刊： 中国物理C,2021年45(2):491-496 ISSN：1674-1137

通讯作者： Li, Xiao-Hua

作者机构： [Li, Xiao-Hua; Pan, Xiao; Liu, Hong-Ming; Zou, You-Tian; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[He, Biao] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;[Li, Xiao-Hua] H;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.

关键词： two-proton radioactivity;Geiger-Nuttall law;empirical formula

摘要： In the present work, a two-parameter empirical formula is proposed, based on the Geiger-Nuttall law, to study two-proton (2p) radioactivity. Using this formula, the calculated 2p radioactivity half-lives are in good agreement with the experimental data as well as with calculated results obtained by Goncalves et al. [Phys. Lett. B 774, 14 (2017)] using the effective liquid drop model (ELDM), Sreeja et al. [Eur. Phys. J. A 55, 33 (2019)] using a fourparameter empirical formula, and Cui et al. [Phys. Rev. C 101: 014301 (2020)] using a generalized liquid drop model (GLDM). In addition, this two-parameter empirical formula is extended to predict the half-lives of 22 possible 2p radioactivity candidates with 2p radioactivity released energy Q2p > 0, obtained from the latest evaluated atomic mass table AME2016. The predicted results are highly consistent with those obtained using other theoretical models such as the ELDM, GLDM and four-parameter empirical formula. © 2021 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

语种： 英文

作者： Chu, Peng-Cheng*;Zhou, Yi;Jiang, Yao-Yao;Ma, Hong-Yang;Liu, He;...

期刊： EUROPEAN PHYSICAL JOURNAL C,2021年81(1):1-7 ISSN：1434-6044

通讯作者： Chu, Peng-Cheng

作者机构： [Liu, He; Zhang, Xiao-Min; Chu, Peng-Cheng] Qingdao Univ Technol, Sci Sch, Res Ctr Theoret Phys, Qingdao 266033, Peoples R China.;[Liu, He; Zhang, Xiao-Min; Chu, Peng-Cheng] Qingdao Univ Technol, Res Ctr Theoret Phys, Qingdao 266033, Peoples R China.;[Zhou, Yi] Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266033, Peoples R China.;[Jiang, Yao-Yao; Ma, Hong-Yang] Qingdao Univ Technol, Qingdao 266033, Peoples R China.;[Jiang, Yao-Yao; Ma, Hong-Yang] Qingdao Univ Technol, Quantum Phys Lab, Qingdao 266033, Peoples R China.

通讯机构： [Chu, Peng-Cheng] Q;Qingdao Univ Technol, Sci Sch, Res Ctr Theoret Phys, Qingdao 266033, Peoples R China.;Qingdao Univ Technol, Res Ctr Theoret Phys, Qingdao 266033, Peoples R China.

摘要： We study the thermodynamic properties of asymmetric quark matter and large mass quark stars within the confined-isospin-density-dependent-quark-mass model. We find that the quark matter symmetry energy should be very large in order to describe the recent discovered heavy compact stars PSR J0348+0432 ( $$\text {2.01}\pm \text {0.04}M_{\odot }$$ ), MSP J0740+6620 ( $$\text {2.14}\pm ^\text {0.10}_\text {0.09}M_{\odot }$$ of 68.3 $$\%$$ credibility interval and $$\text {2.14}\pm ^\text {0.20}_\text {0.18}M_{\odot }$$ of 95.4 $$\%$$ credibility interval) and PSR J2215+5135 (2.27 $$\pm ^\text {0.10}_\text {0.09}M_{\odot }$$ ) as QSs. The tidal deformability $$\Lambda _{1.4}$$ of the QSs is also investigated in this work, and the result indicates that $$\Lambda _{1.4}$$ may depend on the isospin effects and the strength / orientation distribution of the magnetic fields inside the quark stars.

语种： 英文

作者： Chu, Peng-Cheng*;Zhou, Yi;Chen, Chang*;Li, Xiao-Hua*;Ma, Hong-Yang*

期刊： JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2020年47(8):085201 ISSN：0954-3899

通讯作者： Chu, Peng-Cheng;Chen, Chang;Ma, Hong-Yang;Li, Xiao-Hua

作者机构： [Chu, Peng-Cheng] Qingdao Technol Univ, Sch Sci, Inst Theoret Phys, Qingdao 266000, Peoples R China.;[Chu, Peng-Cheng; Chu, PC; Chen, Chang] Qingdao Technol Univ, Quantum Phys Lab, Qingdao 266000, Peoples R China.;[Zhou, Yi] Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266000, Peoples R China.;[Chen, Chang; Ma, Hong-Yang] Qingdao Technol Univ, Sch Sci, Qingdao 266000, Peoples R China.;[Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.

通讯机构： [Chu, Peng-Cheng; Chu, PC; Chen, C; Ma, HY] Q;[Li, Xiao-Hua] U;Qingdao Technol Univ, Sch Sci, Inst Theoret Phys, Qingdao 266000, Peoples R China.;Qingdao Technol Univ, Quantum Phys Lab, Qingdao 266000, Peoples R China.;Qingdao Technol Univ, Sch Sci, Qingdao 266000, Peoples R China.

关键词： quark matter;symmetry energy;compact stars

摘要： The quark matter symmetry free energy and the thermodynamical properties of strange quark matter (SQM) in strong magnetic fields and non-zero temperature cases are discussed in this work within Nambu–Jona-Lasinio (NJL) model by considering two kinds of vector interactions. The properties of the proto-quark stars (PQSs) are also studied by introducing a density-dependent magnetic field strength distribution and assuming two 'extreme' magnetic orientation cases inside the quark stars (QSs). The results indicate that the strength and orientation distribution of the magnetic fields in the QSs and the heating/cooling process during the star evolution may both influence the star mass of QSs within SU(3) NJL model.

语种： 英文

作者： 李小华;王超;任廷伟;杜力婕;王翊年;...

期刊： 核安全,2020年19(01):8-31 ISSN：1672-5360

作者机构： 南华大学核科学技术学院,衡阳 421001;[任廷伟; 王超; 邓斌浩; 李俊; 王翊年; 杜力婕; 王家豪; 李小华] 南华大学

关键词： 电子加速器;治疗;剂量

摘要： 本文结合2001年波兰比亚韦斯托克肿瘤中心(BOC)医用电子加速器辐射事故及该机构的放射治疗设备概况,对波兰电离辐射安全监管体系进行了介绍,并对辐射事故过程、应急响应、IAEA救援、剂量评估、临床过程、结果和经验教训等方面进行了分析和说明。实践表明,导致向患者输出剂量率比预期高许多倍的原因包括:医疗机构的供电不稳定,NEPTUN10P型医用加速器不符合IEC颁布的最新标准,电子枪灯丝电流限制值设置在较高的水平,束流监测系统故障,二极管故障,安全联锁失效,显示屏剂量率低于实际值。IAEA援助小组的建议与援助、剂量评估以及良好的医疗条件为患者提供了医疗保障。本文可作为辐射事故应急的参考。

语种： 中文

作者： 李小华;王翊年;王家豪;李俊;邓斌浩;...

期刊： 核安全,2020年19(03):34-52 ISSN：1672-5360

作者机构： 南华大学核科学技术学院,衡阳,421001;[邓斌浩; 陈维; 李俊; 王翊年; 王家豪; 李小华; 王婷] 南华大学

关键词： 工业探伤;输源管;准直器;辐射事故;剂量

摘要： 本文从辐射事故的国际援助背景、事故过程、应急响应、事故重建、剂量估算、医学救治、调查结果、经验教训等方面对2014年秘鲁192Ir工业探伤辐射事故进行了详细介绍。秘鲁192Ir工业探伤辐射事故的实践表明,发生事故的探伤公司缺乏工业探伤安全操作规程和辐射防护规程,工人探伤作业期间未使用便携式辐射监测仪,使用个人剂量报警仪不当,设备存在故障是事故发生的主要原因。由于秘鲁和IAEA的应急响应,国际医疗技术合作,事故重建与剂量估算,使受照者得到了合适、高效、充分的医疗救治。本文将为辐射事故应急提供经验和参考。

语种： 中文

作者： 程俊皓;陈玖龙;邓军刚;李小华

期刊： 原子核物理评论,2020年37(03):554-562 ISSN：1007-4627

作者机构： 南华大学核科学技术学院,湖南衡阳 421001;[邓军刚; 程俊皓; 陈玖龙; 李小华] 南华大学

关键词： α衰变;质子放射;Gamow-like模型;静电屏蔽

摘要： 通过引入离心势和静电屏蔽效应对Gamow-like模型进行了改进,并将其用于α衰变和质子放射性研究,发现改进的Gamow-like模型能更好地符合实验数据。另外,还利用改进的Gamow-like模型预言了16个丰质子核的质子放射性的半衰期以及7个Z = 120超重核素(~(296-308)120)α衰变链上原子核的α衰变的半衰期,为将来在大科学装置上合成和鉴别这些新核素提供重要的理论参考。

语种： 中文

作者： Cheng, Jun-Hao;Chen, Jiu-Long;Deng, Jun-Gang;Li, Xiao-Hua*;Zhang, Zhen*;...

期刊： Nuclear Physics A,2020年997:121717- ISSN：0375-9474

通讯作者： Li, Xiao-Hua;Zhang, Zhen;Chu, Peng-Cheng

作者机构： [Cheng, Jun-Hao; Li, Xiao-Hua; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Zhang, Zhen] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.;[Chu, Peng-Cheng] Qingdao Technol Univ, Sch Sci, Qingdao 266000, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;[Zhang, Zhen] S;[Chu, Peng-Cheng] Q;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.

关键词： Proton emission;Two-potential approach;Skyrme-Hartree-Fock

摘要： In this work we systematically study the proton emission half-lives of 53≤Z≤83 nuclei within the two-potential approach with Skyrme-Hartree-Fock. At first, we use this model to study the proton emission half-lives of 32 spherical nuclei. The total proton-daughter nuclei interaction potential includes: the microscopic nuclear potential calculated by the spherical Hartree-Fock self-consistent equation with the Skyrme effective interaction of SLy4, SkC and SkD, the Coulomb potential obtained under the assumption of a uniformly charged sphere and the Langer modified centrifugal potential. The calculations can reproduce the experimental data well. And then, we extend this model to the deformed cases and compare it with other models. Meanwhile, we discuss the relationship between the theoretical half-lives of parent nuclei 113Cs, 117La, 121Pr, 135Tb and 141Ho and corresponding l values taken away by emitted proton. A set of these parent nuclei reference values of l are given to calculate the theoretical half-lives which are more in line with experimental data. At last, we use this model to predict proton emission half-lives of 13 nuclei in the same region, whose proton emission is energetically allowed or observed but not yet quantified in NUBASE2016. © 2020 Elsevier B.V.

语种： 英文

作者： Liu, Hong-Ming;Zou, You-Tian;Pan, Xiao;Bao, Xiao-Jun*;Li, Xiao-Hua*

期刊： 中国物理C,2020年44(9):094106 ISSN：1674-1137

通讯作者： Li, Xiao-Hua;Bao, Xiao-Jun

作者机构： [Li, Xiao-Hua; Pan, Xiao; Liu, Hong-Ming; Zou, You-Tian] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Bao, Xiao-Jun] Hunan Normal Univ, Changsha 410081, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua; Bao, Xiao-Jun; Bao, XJ; Li, XH] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;[Bao, Xiao-Jun; Bao, XJ; Li, XH] H;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Hunan Normal Univ, Changsha 410081, Peoples R China.;Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.

关键词： alpha decay;alpha decay preformation factor;shell closure;generalized liquid drop model

摘要： In this study, we systematically investigate the α decay preformation factors, Pα, and the α decay half-lives of 152 nuclei around Z = 82, N = 126 closed shells based on the generalized liquid drop model (GLDM) with Pα being extracted from the ratio of the calculated α decay half-life to the experimental one. The results show that there is a remarkable linear relationship between Pα and the product of valance protons (holes) Np and valance neutrons (holes) Nn. At the same time, we extract the α decay preformation factor values of the even-even nuclei around the Z = 82, N = 126 closed shells from the study of Sun et al. [J. Phys. G: Nucl. Part. Phys., 45: 075106 (2018)], in which the α decay was calculated by two different microscopic formulas. We find that the α decay preformation factors are also related to NpNn. Combining with our previous studies [Sun et al., Phys. Rev. C, 94: 024338 (2016); Deng et al., ibid. 96: 024318 (2017); Deng et al., ibid. 97: 044322 (2018)] and that of Seif et al., [Phys. Rev. C, 84: 064608 (2011)], we suspect that this phenomenon of linear relationship for the nuclei around the above closed shells is model-independent. This may be caused by the effect of the valence protons (holes) and valence neutrons (holes) around the shell closures. Finally, using the formula obtained by fitting the α decay preformation factor data calculated by the GLDM, we calculate the α decay half-lives of these nuclei. The calculated results agree with the experimental data well. © 2020 Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd.

语种： 英文

作者： 高雅;吴臻泓;钟翠;黄麟钦;李小华;...

期刊： 南华大学学报(自然科学版),2020年34(2):16-20 ISSN：1673-0062

作者机构： 南华大学 核科学技术学院,湖南 衡阳421001;[黄麟钦; 郑波; 钟翠; 张振华; 高雅; 李小华; 吴臻泓] 南华大学

关键词： 三体末态;二维不变质量谱加权法;探测效率计算;中间共振态

摘要： 多体末态过程通常包含的中间共振态直接影响到探测效率的确定.研究了采用二维不变质量谱加权的方法,用于计算多体末态过程的探测效率.对三体末态e+e-→π+π-η过程,考虑了e+e-→π+π-η,e+e-→ρη和e+e-→a±2π?三个过程的贡献,并利用二维不变质量谱加权法对该末态模拟数据样本的探测效率进行了估计.与直接加权的结果对比表明该方法能够快速且有效地确定探测效率.

语种： 中文

作者： Cheng, Jun-Hao;Pan, Xiao;Zou, You-Tian;Li, Xiao-Hua*;Zhang, Zhen;...

期刊： EUROPEAN PHYSICAL JOURNAL A,2020年56(10):1-10 ISSN：1434-6001

通讯作者： Li, Xiao-Hua

作者机构： [Cheng, Jun-Hao; Li, Xiao-Hua; Pan, Xiao; Zou, You-Tian] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Cheng, Jun-Hao] Nucl Power Inst China, Chengdu 610041, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.;[Zhang, Zhen] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;[Li, Xiao-Hua] H;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Peoples R China.

摘要： Proton radioactivity is an important and common process of the natural radioactivity of proton-rich nuclei. In our previous work (Cheng et al. in Nucl Rhys A 997: 121717, 2020), we systematically studied the proton radioactivity half-lives of 53 ≤ Z≤ 83 nuclei within the two-potential approach with Skyrme–Hartree–Fock. The calculations can well reproduce the experimental data of spherical nuclei. The present work is an extension of the previous work. We systematically study 32 proton radioactivity half-lives of spherical nuclei with the two-potential approach with Skyrme–Hartree–Fock (TPA-SHF) within 115 different versions of the Skyrme interactions. The calculated results indicate that the SLy7 Skyrme interaction gives the lowest r.m.s. deviation in the description of the experimental data of the spherical proton emitters among all the different versions of the Skyrme interactions. In addition, we use this model with the SLy7 Skyrme interaction to predict the proton radioactivity half-lives of 7 spherical nuclei in the same region, whose proton radioactivity is energetically allowed or has been observed but is not yet quantified. © 2020, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.

语种： 英文

作者： 李小华;肖拥军;张振华;郑波

期刊： 教育教学论坛,2020年(37):89-90 ISSN：1674-9324

作者机构： 南华大学核科学技术学院,湖南 衡阳 421001;[郑波; 肖拥军; 张振华; 李小华] 南华大学

关键词： 研究生招生;培养模式;改革

摘要： 我国研究生招生制度、培养模式日趋成熟,但问题依然突出,如:招生考试模式僵化、录取标准单一、培养方式机械化等等。高校作为研究生招生和培养的主要单位,承载着为国家输送***科研人员的重任。因而,在研究生招生和培养模式上进行改革成为高校研究生教育迫在眉睫的议题。为此,应该扩大高校自主招生的权利、建立多元化的录取标准、丰富培养模式,不断完善研究生教育机制。

语种： 中文

作者： Xu, Jun-Yao;Chen, Jiu-Long;Deng, Jun-Gang*;Cheng, Jun-Hao;Liu, Hong-Ming;...

期刊： 理论物理,2019年71(11):1328-1334 ISSN：0253-6102

通讯作者： Deng, Jun-Gang

作者机构： [Cheng, Jun-Hao; Xu, Jun-Yao; Li, Xiao-Hua; Liu, Hong-Ming; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.

通讯机构： [Deng, Jun-Gang] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.

关键词： even-even nuclei with Z = 120;hindrance factor;two-potential approach;α decay

摘要： In the present work, we predict the α decay half-lives of unknown even-even nuclei296-308120 within the two-potential approach, whose α decay energy Qα is calculated using WS3+ mass model. To reduce the deviations between the predictions and experimental data due to nuclear shell effect, the analytic formula of α decay hindrance factor is introduced to the two-potential approach, whose parameters had been extracted from even-even nuclei in the region of 82 < Z ≤ 126 and 152 < N ≤ 184 in our previous work [Deng et al., Chin. Phys. C 42 (2018) 044102]. In addition, for comparing, we use a type of α decay general formula Universal Decay Law (UDL) and a semi-empirical formula in the superheavy nucleus (SEMFLS) to calculate the half-lives of even-even nuclei296-308120. The results indicate that our predicted values and the calculated values of the above two empirical formulas are mutually confirmed. Meanwhile, we systematically study α decay chains of296-308120 and predict the decay modes for superheavy nuclei to help to identify new superheavy isotopes. © 2019 Chinese Physical Society and IOP Publishing Ltd.

语种： 英文

作者： Cheng, Jun-Hao;Chen, Jiu-Long;Deng, Jun-Gang;Wu, Xi-Jun;Li, Xiao-Hua*;...

期刊： Nuclear Physics A,2019年987:350-368 ISSN：0375-9474

通讯作者： Li, Xiao-Hua

作者机构： [Cheng, Jun-Hao; Li, Xiao-Hua; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[Chu, Peng-Cheng] Qingdao Technol Univ, Sch Sci, Qingdao 266000, Shandong, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.

关键词： alpha decay;Gamow-like model;Electrostatic shielding;Un-synthesized nuclei

摘要： In the present work we systematically study alpha decay half-lives of Z > 51 nuclei using the modified Gamow-like model which includes the effects of the centrifugal potential and electrostatic shielding. For the case of even-even nuclei, this model contains two adjustable parameters: the parameter a related to the screened electrostatic barrier and the radius constant r(0), while for the case of odd-odd and odd-A nuclei, it is added a new parameter i.e. hindrance factor h which is used to describe the effect of an odd-proton and/or an odd-neutron. Our calculations can well reproduce the experimental data. In addition, we use this modified Gamow-like model to predict the alpha-decay half-lives of seven even-even nuclei with Z = 120 and some un-synthesized nuclei on their alpha decay chains. (C) 2019 Elsevier B.V. All rights reserved.

语种： 英文

作者： 任才;孙光智;陈祥磊;代传波;曾乐;...

期刊： 核电子学与探测技术,2019年39(03):331-336 ISSN：0258-0934

作者机构： 武汉第二船舶研究设计所,湖北武汉,430064;南华大学核科学技术学院,湖南衡阳,421001;[代传波; 裴煜; 曾乐; 刘巍; 程翀; 任才; 王东芹; 陈祥磊; 孙光智] 武汉第二船舶设计研究所;[李小华] 南华大学

关键词： 蒙特卡罗方法;流气式电离室;放射性惰性气体探测器

摘要： 利用蒙特卡罗程序研究了核电厂气载放射性监测通道中重要监测设备放射性惰性气体探测器的结构设计思路、性能评估,主要研究内容包括优化探测器结构、分析影响测量准确性的因素、分析探测器测量范围、探测器自检源活度及其对周围环境的影响,本文详细展示了模拟计算结果,并总结其反应规律,为放射性惰性气体探测器的研制提供了重要的数据参考和理论支持。

语种： 中文

作者： Chen, Jiu-Long;Xu, Jun-Yao;Deng, Jun-Gang;Li, Xiao-Hua*;He, Biao;...

期刊： EUROPEAN PHYSICAL JOURNAL A,2019年55(11):1-8 ISSN：1434-6001

通讯作者： Li, Xiao-Hua

作者机构： [Xu, Jun-Yao; Li, Xiao-Hua; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[He, Biao] Cent S Univ, Coll Phys & Elect, Changsha 410083, Hunan, Peoples R China.;[Chu, Peng-Cheng] Qingdao Technol Univ, Sch Sci, Qingdao 266000, Shandong, Peoples R China.

通讯机构： [Li, Xiao-Hua] U;[Li, Xiao-Hua] H;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.

摘要： In the present work considering the contributions of the daughter nuclear charge and the orbital angular momentum taken away by the emitted proton, we propose a two-parameter formula of new Geiger-Nuttall law for proton radioactivity. A set of universal parameters of this law is obtained by fitting 44 experimental data of proton emitters in the ground state and isomeric state. The calculated results can reproduce the experimental data well. For a comparison, the calculations performed using other theoretical methods, such as UDLP proposed by Qi et al. (Phys. Rev. C 85, 011303(R) (2012)), the CPPM-Guo2013 analyzed by our previous work (Deng et al., Eur. Phys. J. A 55, 58 (2019)) and the modified Gamow-like model proposed by us (Chen et al., J. Phys. G: Nucl. Part. Phys. 96, 065107 (2019)) are also included. Meanwhile, we extend this new Geiger-Nuttall law to predict the proton radioactivity half-lives for 51 ≤ Z≤ 91 nuclei, whose proton radioactivity is energetically allowed or observed but not yet quantified in NUBASE2016. © 2019, Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.

语种： 英文

作者： Chu, Peng-Cheng*;Zhou, Yi*;Li, Xiao-Hua*;Zhang, Zhen*

期刊： PHYSICAL REVIEW D,2019年100(10):103012 ISSN：2470-0010

通讯作者： Chu, Peng-Cheng;Zhou, Yi;Li, Xiao-Hua;Zhang, Zhen

作者机构： [Chu, Peng-Cheng] Qingdao Technol Univ, Qingdao 266000, Shandong, Peoples R China.;[Zhou, Yi] Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266000, Shandong, Peoples R China.;[Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Zhang, Zhen] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.

通讯机构： [Chu, Peng-Cheng; Zhou, Yi] Q;[Li, Xiao-Hua] U;[Zhang, Zhen] S;Qingdao Technol Univ, Qingdao 266000, Shandong, Peoples R China.;Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266000, Shandong, Peoples R China.

摘要： We have investigated the properties of strange quark matter and quark stars at finite temperature within the confined isospin-density-dependent mass (CIDDM) model. The newly discovered heavy compact stars PSR J0348+0432 ( 2.01±0.04  M⊙) and MSP J0740+6620 ( 2.14±0.090.10  M⊙ of 68.3% credibility interval and 2.14±0.180.20  M⊙ of 95.4% credibility interval) can be well described as quark stars with large quark matter symmetry energy within the CIDDM model in this work. In particular, we also calculate the properties of the protoquark stars (PQSs) at the heating and cooling stages along the star evolution line, and we find that the tidal deformability of PQSs increases with temperature in the heating stages within the CIDDM model.

语种： 英文

作者： 李小华;何列;李世祯;陈维;李俊杰

期刊： 核安全,2019年18(3):1-10 ISSN：1672-5360

作者机构： 南华大学核科学技术学院,衡阳,421001;[李俊杰; 李世祯; 何列; 陈维; 李小华] 南华大学

关键词： 核能;核技术;利用;放射性;环保

摘要： 本文从核能工程以及核技术在工业、农业、医学、水文学、文物、环境保护、太空探索和宇宙学等领域的应用,简要介绍了其工作原理和特点,旨在向公众普及身边的核能与核技术利用知识。

语种： 中文

作者： Chen, Jiu-Long;Li, Xiao-Hua*;Cheng, Jun-Hao;Deng, Jun-Gang;Wu, Xi-Jun*

期刊： JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS,2019年46(6) ISSN：0954-3899

通讯作者： Li, Xiao-Hua;Wu, Xi-Jun

作者机构： [Cheng, Jun-Hao; Li, Xiao-Hua; Deng, Jun-Gang; Chen, Jiu-Long] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.

通讯机构： [Li, Xiao-Hua; Wu, Xi-Jun] U;[Li, Xiao-Hua] H;Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;Hunan Normal Univ, Key Lab Low Dimens Quantum Struct & Quantum Contr, Changsha 410081, Hunan, Peoples R China.

关键词： electrostatic barrier;half-life;proton radioactivity

摘要： In the present work we systematically study the half-lives of proton radioactivity for 51 ≤ Z ≤ 83 nuclei based on the Gamow-like model with a screened electrostatic barrier. In this model there are two parameters while considering the screened electrostatic effect of Coulomb potential with the Hulthen potential, i.e. the effective nuclear radius parameter r 0 and the screening parameter a. The calculated results can reproduce the experimental data well. In addition, we extend this model to predict the proton radioactivity half-lives of 16 nuclei in the same region within a factor of 2.94, whose proton radioactivity are energetically allowed or observed but not yet quantified. Meanwhile, studying of the proton radioactivity half-life by a type of universal decay law has been done. The results indicate that the calculated half-lives are linearly dependent on Coulomb parameter with the same orbital angular momentum. © 2019 IOP Publishing Ltd.

语种： 英文

作者： Chu, Peng-Cheng*;Zhou, Yi;Qi, Xin;Li, Xiao-Hua;Zhang, Zhen;...

期刊： PHYSICAL REVIEW C,2019年99(3):035802 ISSN：2469-9985

通讯作者： Chu, Peng-Cheng

作者机构： [Qi, Xin; Chu, Peng-Cheng] Qingdao Univ Technol, Sch Sci, Qingdao 266000, Peoples R China.;[Zhou, Yi] Qingdao Univ Sci & Technol, Sch Math & Phys, Qingdao 266000, Peoples R China.;[Li, Xiao-Hua] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua] Univ South China, Cooperat Innovat Ctr Nucl Fuel Cycle Technol & Eq, Hengyang 421001, Peoples R China.;[Zhang, Zhen] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China.

通讯机构： [Chu, Peng-Cheng] Q;Qingdao Univ Technol, Sch Sci, Qingdao 266000, Peoples R China.

摘要： We investigate the isospin properties of the strange quark matter (SQM) and quark stars (QSs) in the framework of the isospin-dependent confining quark matter (ICQM) model and confined-isospin and density-dependent mass (CIDDM) model. Within these two isospin-dependent quark mass phenomenological models, we study the quark matter symmetry energy, the stability of strange quark matter, the quark fractions, the isospin asymmetry, and the quark mass asymmetry in SQM, and the mass-radius relation of quark stars. We find that including isospin dependence of the quark mass can significantly influence the isospin properties of the quark matter. Recently, the LIGO-Virgo collaboration reported their detection of gravitational wave (GW) signals GW170817, which are originating from a binary compact star merger. Using the ICQM model and CIDDM model, we describe the compact stars with the new maximum mass limits 2.01−0.04+0.04≤M/M⊙≤2.16−0.15+0.17 as quark stars, and the dimensionless tidal deformabilities of QSs are also investigated in this work.

语种： 英文

作者： 李小华;李俊杰;陈维;李世祯;何列;...

期刊： 核安全,2019年18(2):14-35 ISSN：1672-5360

作者机构： 南华大学核科学技术学院,衡阳,421001;[李世祯; 李俊杰; 何列; 张博洋; 陈维; 李小华; 陈远登; 王健旭] 南华大学

关键词： 放射源;工业探伤;辐射事故;剂量

摘要： 本文结合2012年秘鲁发生的一起^192Ir源工业探伤辐射事故,对其辐射安全监管机构及法律法规进行了初步介绍,并从事故发生过程、应急响应、初步剂量评估、临床表现与诊断以及IAEA援助团的医疗建议、剂量重建、受照者医疗管理、结论和经验教训等方面对该起辐射事故进了分析说明。事故的实践表明:探伤公司RPO未到探伤现场监督作业过程,由未获得探伤作业许可证的工人操作探伤设备,且未配带辐射报警仪,未利用辐射监测仪判断放射源是否回到探伤机源容器内,是事故发生的主要原因。事件和紧急情况信息统一交换系统、IAEA国际援助团的快速组建和医疗建议、IAEA会员国的密切合作、辐射损伤专业医疗技术、充足的资金,可以为事故应急和受照人员的医疗救助提供有力保障。本案例可为辐射事故应急提供借鉴和参考。

语种： 中文