摘要：
<jats:title>Abstract</jats:title>
<jats:p>In this study, based on the Gamow-like model, we systematically analyze two-proton (
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</jats:inline-formula>) radioactivity half-lives of nuclei near or beyond the proton drip line. It is found that the calculated results can reproduce experimental data well. Furthermore, using this model, we predict the half-lives of possible
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</jats:inline-formula> radioactivity candidates whose
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</jats:inline-formula> radioactivity is energetically allowed or observed but not yet quantified in the latest table of evaluated nuclear properties, i.e., NUBASE2016. The predicted results are in good agreement with those from other theoretical models and empirical formulas, namely the effective liquid drop model (ELDM), generalized liquid drop model (GLDM), Sreeja formula, and Liu formula.
</jats:p>
作者机构：
[安文慧; 吴川; 薛生国; 刘梓毓; 何璇] School of Metallurgy and Environment, Central South University, Changsha, 410083, China;[刘敏] College of Nuclear science and Technology, University of South China, Hengyang, 421001, China
作者机构：
[杨超; 于涛] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[邓力; 程汤培] CAEP Software Center for High Performance Numerical Simulation, Beijing;100094, China;[杨超; 于涛] 421001, China
作者机构：
[徐士坤; 于涛; 谢金森; 姚磊] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Hunan Engineering & Technology Research Center for Virtual Nuclear Reactor, University of South China, Hengyang;[李满仓; 夏羿] Nuclear Power Institute of China, Chengdu;610213, China
作者机构：
[雷济充; 谢金森; 于涛; 陈珍平; 赵鹏程; 谢超; 倪梓宁] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Virtual Simulation Experiment Teaching Center on Nuclear Energy and Technology, University of South China, Hengyang;[周剑东] Shanghai Nuclear Engineering Research and Design Institute Co., Ltd., Shanghai;200000, China
作者机构：
[Lan, Hao-Yang; Zhang, Jia-Lin; Song, Tan; Zhou, Jian-Liang; Luo, Wen] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Luo, Wen] Univ South China, Natl Exemplary Base Int Sci & Tech, Collaborat Nucl Energy & Nucl Safety, Hengyang 421001, Peoples R China.
通讯机构：
[Wen Luo] S;School of Nuclear Science and Technology, University of South China, Hengyang, China<&wdkj&>National Exemplary Base for International Sci. & Tech., Collaboration of Nuclear Energy and Nuclear Safety, University of South China, Hengyang, China
关键词：
Special nuclear material;Nondestructive interrogation;Nuclear resonance fluorescence
作者机构：
[徐士坤; 于涛; 谢金森; 刘金聚] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;Hunan Engineering & Technology Research Center for Virtual Nuclear Reactor, University of South China, Hengyang;[徐士坤; 于涛; 谢金森; 刘金聚] 421001, China <&wdkj&> Hunan Engineering & Technology Research Center for Virtual Nuclear Reactor, University of South China, Hengyang;[徐士坤; 于涛; 谢金森; 刘金聚] 421001, China
作者机构：
[Jin, Gen] School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[张鹤耀] School of Microelectronics and Control Engineering, Changzhou University, Changzhou;213164, China;[连鹏飞; 刘占军] Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan
作者机构：
[王中旺; 肖德涛; 邓湘元; 罗诗慧; 过灵飞] Radon Hunan Provincial Key Laboratory, School of Nuclear Science and Technology, University of South China, Hengyang;421001, China;[王中旺; 肖德涛; 邓湘元; 罗诗慧; 过灵飞] 421001, China
作者机构：
[刘劲; 吴雨田; 邓爽; 肖静水; 彭安国] School of Nuclear Science and Technology, University of South China, Hengyang, 421001, China;[刘广山; 李超] College of the Environment and Ecology, Xiamen University, Xiamen, 361005, China
通讯机构：
[Peng, A.] S;School of Nuclear Science and Technology, China
作者：
Wan Shun-kuan;Lu Bo;Zhang Hong-ming*;He Liang;Fu Jia;...
期刊：
光谱学与光谱分析,2021年41(10):3111-3116 ISSN：1000-0593
通讯作者：
Zhang Hong-ming
作者机构：
[Lu Bo; Fu Jia; Wan Shun-kuan; Wang Fu-di; Zhang Hong-ming; Li Yi-chao; Bin Bin; He Liang] Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China.;[Wan Shun-kuan; Li Yi-chao] Univ Sci & Technol China, Hefei 230026, Peoples R China.;[Ji Hua-jian] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
摘要：
便携式近红外光谱仪现场快速检测是近红外光谱分析领域的一个重要的发展趋势。 为了实现快速检测, 便携式近红外光谱仪一般不配备温控装置, 因此环境温度的变化会带来较大的测量误差。 如何降低环境温度对检测结果带来的误差, 是便携式近红外光谱仪在现场快速检测领域大规模推广所需要解决的一个重要问题。 柴油的凝点值是评价柴油品质和适用范围的一个重要指标, 对柴油凝点进行快速检测有重要的经济意义。 通过便携式光谱仪采集了50种具有不同凝点的柴油样品在近红外波段(950~1 650 nm)的吸收光谱, 研究了环境温度变化下的基于近红外光谱分析的柴油凝点快速检测方法。 此光谱仪为基于数字微镜设计的便携式光谱仪, 针对现场快检而研发, 未配备温控样品池。 在环境温度T0=25 ℃时基于偏最小二乘法建立了柴油凝点的预测模型, 并分别将不同环境温度(TE=-10, 0, 10, 20, 30, 40和50 ℃)条件下测量的近红外光谱带入上述凝点预测模型, 分析预测偏差随环境温度相对参考值变化(TE-T0)的依赖关系。 通过一次函数对预测误差随环境温度的变化关系进行拟合, 发现凝点预测偏差的平均值随环境温度的变化关系为Δc=-0.019 8(TE-T0)。 将环境温度的修正因子带入25 ℃条件下预测模型, 建立了针对环境温度变化的温度修正模型。 在温度修正以后, 10 ℃条件下预测凝点的均方根误差由原来的14.6降为8.8, 相关系数由原来的0.4提升为0.7。 研究表明, 本温度修正模型可以有效降低环境温度对预测结果带来的误差。 基于此温度修正模型, 可以显著降低近红外光谱分析建模过程的工作量, 在某一特定温度条件下建立预测模型后将此温度修正项带入模型即可用于在其他环境温度条件下进行柴油凝点值的预测, 而不需要在其他多个温度条件下分别建立预测模型, 可显著提高建模效率和便携式近红外光谱快速检测的温度适应性。 Portable near-infrared (NIR) spectrometer for quick on-site measurement is an important trend in the study field of NIR spectroscopy. However, in order to achieve quick measurement, a portable NIR spectrometer is generally not equipped with temperature-controlled device. Therefore, the change in ambient temperature will bring a relatively large measurement error to the predicted results. Reducing the error caused by the changes in ambient temperature is an important problem that has to be solved before the large-scale application of portable near-infrared spectrometer in the field of quick on-site measurement. The condensation points of diesel is an important parameter to evaluate diesel quality and temperature range for diesel application. Development of the on-site quick measurement of condensation point can effectively reduce the cost of traditional measurement. In the present study, the NIR spectra are collected by a portable spectrometer in the wavelength range of 950~1 650 nm for 50 kinds of diesel samples with different condensation points. The effect of changes in ambient temperature on the quantitative analysis results is studied using one new type of NIR spectrometer. This type of spectrometer is a portable spectrometer designed based on a digital micromirror device(DMD), which is developed for quick on-site measurement without temperature-controlled device sample cell. Firstly, the predicting model is developed for condensation point under the condition of ambient temperature at T0=25 ℃, using based on the partial least square method. Then, the spectra measured under other ambient temperatures (TE=-10, 0, 10, 20, 30, 40 and 50 ℃) are introduced into this model to predict the condensation point, and the relationship between prediction error and changes in ambient temperature (TE-T0) is studied. The linear function fitted the relationship between prediction error and ambient temperature. It is found that the average value of condensation point prediction error is Δc=-0.019 8(TE-T0). The compensation factor of environmental temperature is brought into the prediction model developed under 25 ℃, and a temperature compensation model for the change in ambient temperature is established to predict the condensation point of diesel with NIR spectra collected under other conditions ambient temperature. The root means square error (RMSE) of condensation point prediction at 10 ℃ is improved from 14.6 to 8.8, and the coefficient of determination increased from 0.4 to 0.7. The study shows that the temperature compensation model can effectively reduce the error caused by ambient temperature. This method can improve the time cost for developingthe model and extend the temperature range in applying a portable NIR spectrometer.
作者机构：
[姚鑫森] Radiotherapy Center, Chenzhou First People's Hospital, Chenzhou 423000, China;[巩贯忠; 尹勇] Department of Radiation Physics, Shandong Cancer Hospital and Institute, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan 250117, China;[任建新] School of Physics and Technology, Wuhan University, Wuhan 430072, China;[左国平] School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
通讯机构：
[Yong, Y.] D;Department of Radiation Physics, China
作者机构：
[Fu Jia; Lyu Bo; Bin Bin; Li Yichao; Wan Shunkuan; Zhang Hongming; Li Yingying; Wang Fudi; He Liang] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China.;[Wang Xunyu; Yang Jin; Cao Jinjia; Gong Xueyu; He Liang] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.;[Yu Qingjiang; Chen Jun] Univ Sci & Technol China, Dept Engn & Appl Phys, Hefei 230026, Peoples R China.
摘要：
Spectral measurement of tungsten (W) impurity is essential to study impurity transport. Therefore, an X-ray crystal spectrometer (XCS) on EAST was used to measure the line spectra from highly ionized W ions. On EAST, both poloidal XCS and tangential XCS have been developed to measure the plasma temperature as well as the rotation velocity. Recently, He-like and H-like argon spectra have also been obtained using a two-crystal setup. W lines are identified in this study. Through a careful analysis, the W lines of 3.9336, 3.9321, and 3.664 angstrom are found to be diffracted by He-like or H-like crystals. The lines are confirmed with the NIST database. We also calculated the ion temperature with Doppler broadening of these lines. The ion temperature from the W lines is entirely consistent with that from Ar line spectra. The measurement of these W line spectra could be used to study W impurity transport in future work.
作者机构：
[姜庆丰; Zeng, Wenjie; 于涛; 谢金森; 陈乐至] School of Nuclear Science and Technology, University of South China, Hengyang;Hunan;421001, China;[姜庆丰; Zeng, Wenjie; 于涛; 谢金森; 陈乐至] Hunan;[姜庆丰; Zeng, Wenjie; 于涛; 谢金森; 陈乐至] 421001, China
