作者机构：
[Li, Xiao-Hua; Liu, Hong-Ming; Gui, Hai-Feng] 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.;[Chu, Peng-Cheng] Qingdao Univ Technol, Res Ctr Theoret Phys, Sci Sch, Qingdao 266033, Peoples R China.;[He, Biao] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China.;[Li, Xiao-Hua] Univ South China, Natl Exemplary Base Int Sci & Tech Collaborat Nuc, Hengyang 421001, Peoples R China.
通讯机构：
[Li, X.-H.] S;School Of Nuclear Science And Technology, China
关键词：
alpha-decay;deformed two-potential approach;superheavy nuclei;magic number
摘要：
<jats:title>Abstract</jats:title>
<jats:p>In this work, we systematically study the <jats:italic>α</jats:italic> decay half-lives of 196 even–even nuclei using a two-potential approach improved by considering nuclear deformation. The results show that the accuracy of this model has been improved after considering nuclear deformation. In addition, we extend this model to predict the <jats:italic>α</jats:italic> decay half-lives of <jats:italic>Z</jats:italic> = 118 and 120 isotopes by inputting the <jats:italic>α</jats:italic> decay energies extracted from the Weizsacker–Skyrme-type (WS-type) mass model, a simple nuclear mass formula, relativistic continuum Hartree–Bogoliubov theory and Duflo-Zuker-19 (DZ19) mass model. It is useful for identifying the new superheavy elements or isotopes for future experiments. Finally, the predicted <jats:italic>α</jats:italic> decay energies and half-lives of <jats:italic>Z</jats:italic> = 118 and 120 isotopes are analyzed, and the shell structure of superheavy nuclei is discussed. It shows that the shell effect is obvious at <jats:italic>N</jats:italic> = 184, while the shell effect at <jats:italic>N</jats:italic> = 178 depends on the nuclear mass model.</jats:p>
作者机构：
[Chen, Pengju; Tang, Xian] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Xiao, Peng; Li, Yang] Cent South Univ, Powder Met Res Inst, Changsha 410083, Peoples R China.;[Li, Yang] Cent South Univ, Nat Key Lab Sci & Technol High Strength Struct Ma, Changsha 410083, Peoples R China.
通讯机构：
[Yang Li] P;Powder Metallurgy Research Institute, Central South University, Changsha, China<&wdkj&>National Key Laboratory of Science and Technology on High-strength Structural Materials, Central South University, Changsha, China
作者机构：
[李金阳; 刘依诺; Zeng, Wenjie; 胡杨; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[李金阳; 刘依诺; Zeng, Wenjie; 胡杨; 于涛] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[余清远; 赵鹏程] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[马誉高] Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China;[余清远] 421001, China
摘要：
<jats:p xml:lang="en"><sec>ALETHEIA (a liquid hElium time projection cHambEr In dark matter) project is an originally creative dark matter experiment aiming to search for low-mass (100 MeV/c<sup>2</sup>–10 GeV/c<sup>2</sup>) WIMPs. While there have existed more than ten experiments doing research on low-mass WIMPs, the ALETHEIA is supposed to grow up to be a leading project worldwide due to many unique advantages, including but are not limited to extremely low intrinsic backgrounds, easy purification , and strong potential capability of signal/background discrimination. Owing to the project’s original creativity, there has existed no direct experience of building such a detector yet; consequently, we have to launch a set of R&D programs from scratch, including the TPB coating process conveyed in this paper.</sec><sec>An incident particle that hits a liquid helium detector would generate 80-nm-long scintillation. There are currently no commercially available photon detectors capable of efficiently detecting the scintillation light and a wavelength converter must be used to convert the 80-nm-long scintillator into visible light. Silicon photomultipliers (SiPMs) can then be implemented to detect the 450-nm-wavelength light. The TPB (Tetraphenyl Butadiene, 1, 1,4, 4-tetraphenyl-1, 3-butadiene) is widely used for realizing the conversion. Although in thedark matter experiment using argon pulse-shape discrimination (DEAP) , 2.3-μm-thick TPB is successfully coated on the inner wall of the sphere with a radius of 85 cm, we cannot mimic the whole process in our experiment directly out of the two following reasons: (a) our detector shape is cylindrical, not spherical, and (b) the diameter of the current detector prototype is only 10 cm, while the one of the DEAP detectors is as large as 1.7-meter. Consequently, we must design and build an appropriate coating apparatus suitable for our detector. Owing to the existence of necessary auxiliary parts (such as cables for heating and temperature sensors), on which some vapored TPB molecules would be deposited when the coating is in progress. As a result, a blind spot on the inner wall always exists that cannot be fully coated; the blind spot area will affect the visible light yield of 80-nm-long scintillation. To solve the problem, we split the coating process into two steps: coating the curved surface and one base together in the first step and coating another base in the second step. In this way, the cylindrical detector's whole inner wall (the curved surface and the two bases) will be coated. Another key technology is to design an appropriate source sphere containing TPB powder. There are 20 holes evenly distributed on the surface of the sphere. After the TPB powder is heated andevaporated into the gas, the TPB molecules should move slowly enough to ensure that they scatter from each other long enough within the source before randomly finding a hole to escape. As a result, the TPB molecules come out of the source in an isotropic way then adhere to the inner surfaces of a cylindrical detector (diameter and height are both 10 cm) with nearly the same thickness. The TPB coating thickness on the inner wall is in a range between 1.50 and 3.02 μm, which corresponds to the thinnest and thickest TPB plate, respectively. The variation mainly comes from the different distances from the coating place to the source, which lies at the center of the PTFE cylinder. The thickness difference will not bother us because the conversion efficiency for 80-nm-long scintillation is almost the same as that for the TPB thickness in a range from 0.7 to 3.7 μm.</sec><sec>In addition to introducing the ALETHEIA project briefly at the beginning, we mainly address several aspects of TPB coating: coating principle, source design, coating process, coating thickness monitoring, and the comparison of thickness among coating plates from three independent methods. The whole process addressed in this paper is expected to provide a valuable reference for other experiments with similar requirements.</sec></jats:p>
作者机构：
[Li, Xiao-Hua; Pan, Xiao; Zou, You-Tian] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Li, Xiao-Hua; Wu, Xi-Jun] 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.;[Wu, Xi-Jun] Univ South China, Sch Math & Phys, Hengyang 421001, Peoples R China.;[He, Biao] Cent South Univ, Coll Phys & Elect, Changsha 410083, Peoples R China.
通讯机构：
[Xiao-Hua Li] S;School of Nuclear Science and Technology, University of South China, Hengyang 421001, China<&wdkj&>Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment, University of South China, Hengyang 421001, China<&wdkj&>Key Laboratory of Low Dimensional Quantum Structures and Quantum Control, Hunan Normal University, Changsha 410081, China
关键词：
favored one proton radioactivity;one-parameter model;half-lives
摘要：
<jats:title>Abstract</jats:title>
<jats:p>In the present work, a phenomenological one-parameter model (OPM) based on the Wentzel-Kramers-Brillouin (WKB) theory is applied to study the favored one proton radioactivity (the orbital angular momentum <jats:italic>l</jats:italic> taken away by the emitted proton is equal to zero) half-lives. The calculated results can reproduce the experimental data well within a factor of ∼3. In addition, we extend the OPM to predict the half-lives of possible favored one proton radioactivity nuclei whose decay is energetically allowed or observed but not quantified in NUBASE2020. For comparison, a universal decay law of one proton radioactivity (UDLP) is also used. It is obviously found that our predicted results are close to the ones using UDLP. The predictions are helpful for searching for the new nuclides with favored one proton radioactivity.</jats:p>
通讯机构：
[Guoqiang Zhang; Wenjun Ma] S;State Key Laboratory of Nuclear Physics and Technology, and Key Laboratory of HEDP of the Ministry of Education, CAPT, School of Physics, Peking University , Beijing 100871, China<&wdkj&>Shanghai Institute of Applied Physics, Chinese Academy of Sciences , Shanghai 201800, China
关键词：
Ions;Nanowires;Nuclear reactions;Plasma simulation;Electrons energy;High energy density plasmas;Higher energy density;Ion energy density;Nanowires (array);Orders of magnitude;Parameter range;Particle-in-cell simulations;Target parameter;Femtosecond lasers
作者机构：
[谭清懿; 杨开建; 乔冠瑾] Department of Electrical Engineering, University of South China, Hengyang, 421001, China;[杜丹] Department of Mathematics and Physics, University of South China, Hengyang, 421001, China;[潘光祖; 周华; 龚学余] Department of Nuclear Science and Technology, University of South China, Hengyang, 421001, China
通讯机构：
[Du, D.] D;Department of Mathematics and Physics, China
摘要：
本文提出基于NB-IoT(Narrow Band Internet of Things,窄带物联网)技术的核辐射剂量仪研制方案,该仪器采用STM32F103系列单片机作为主控芯片,辐射剂量探测器选用G-M计数管,集成温湿度采集模块,通过BC20物联网模块将采集数据发送到OneNet云平台,云平台能够实时监控仪器所在位置的辐射剂量值以及温湿度值,同时显示仪器的北斗定位信息。该辐射剂量仪能够实现远程实时监测、定位,具备轻量化,低功耗,低成本,覆盖范围广等特点。
作者机构：
[Zhai, Pengdi; 朱恩平; 赵鹏程; 王天石; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Cooperative Innovation Center for Nuclear Fuel Cycle Technology and Equipment, University of South China, Hengyang;Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu;610213, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hunan, Hengyang;[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] 421001, China<&wdkj&>Research Center for Digital Nuclear Reactor Engineering and Technology of Hunan Province, University of South China, Hunan, Hengyang;[钱冠华; 杨涛; 于涛; 赵亚楠; 赵鹏程] 421001, China
作者机构：
[朱恩平; 王婷; 赵鹏程; 凌煜凡; 王天石; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[朱恩平; 王婷; 赵鹏程; 凌煜凡; 王天石; 于涛] 421001, China
通讯机构：
School of Nuclear Science and Technology, University of South China, Hengyang, China
作者机构：
[郭树伟; 陈珍平; 谢金森; 于涛] School of Nuclear Science and Technology, University of South China, Hunan, Hengyang;421001, China;[江新标; 李达; 张信一; 王立鹏; 胡田亮] Northwest Institute of Nuclear Technology State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an;710024, China;[郭树伟] 421001, China<&wdkj&>Northwest Institute of Nuclear Technology State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Xi’an
