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With the growing global demand for nuclear energy, the evaluation of the quality of uranium resource distribution and the precise measurement of reserves have become increasingly important. The uranium fission prompt neutron logging technology, as a critical tool for uranium ore logging exploration, offers the advantage of providing quantitative results unaffected by radioactive equilibrium. However, the measurement accuracy is influenced by the pulse width and yield of the neutron source. This study utilizes a uranium logging instrument equipped with an associated particle sealed-tube neutron generator, which enables time and spatial statistics of the companion α particles emitted by the outgoing neutrons. This approach helps to eliminate interference from the source neutrons and enhances the accuracy of the logging results. In the simulation process, to obtain information on neutron emissions during logging and the timing signal responses of both the companion α detector and the epithermal neutron detector, we propose a response time simulation method that combines Monte Carlo simulation software with MATLAB. By appropriately setting the pre-delay time and gate width, a relationship curve between the count rate and uranium content in formations with uranium levels ranging from 0 to 1.00% was established. The results from validation samples indicate that the calculated uranium content show a deviation of less than 0.1% from the actual values. When the uranium content in the formation exceeds 0.5%, the relative deviation is within 10%. This method meets the exploration requirements and demonstrates significant application value for uranium ore logging.

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随着全球核能需求的增长,对铀资源分布质量的科学评估以及对铀储量的精确测量工作变得尤为重要。铀裂变瞬发中子测井技术作为重要的铀矿测井勘查手段,具有定量结果不受放射性平衡影响的优势,但其测量准确度受到中子源脉冲宽度与产额的影响。基于伴随α中子管的铀矿测井仪,可通过搭载在中子管上的伴随α探测器,对出射中子的伴随α粒子进行时间和空间上的统计,进而剔除源中子干扰,提升测井准确度。在模拟过程中,为了获取测井过程中的中子出射信息,以及伴随α探测器和超热中子探测器的响应时序信号,提高时序模拟效率,提出了一种结合蒙特卡洛模拟软件与MATLAB软件的响应时序模拟方法。通过合理设置预延迟时间和符合门宽,建立了地层铀质量分数为0~1.00%时,符合计数率与地层铀质量分数的关系曲线。对验证样的计算结果表明,地层铀质量分数的计算值与实际值之间的偏差值优于0.1%;当地层铀质量分数高于0.5%,相对偏差优于10%,该方法整体满足勘查需求,具有较强的铀矿测井应用价值。

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张焱(1989—),男,湖北襄阳人,博士,副教授,主要从事核技术及应用方向研究。
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张焱(1989—),男,湖北襄阳人,博士,副教授,主要从事核技术及应用方向研究。

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journalId=1146123346816638986, articleId=1154015955458970107, language=EN, label=Fig. 8, caption=Relationship between uranium content in strata and statistical counting, figureFileSmall=pCuiT//yAw2JWNAXshnxzg==, figureFileBig=we1FJM2nSLMzRb3YgX4NYQ==, tableContent=null), ArticleFig(id=1179483447971168461, tenantId=1146029695717560320, journalId=1146123346816638986, articleId=1154015955458970107, language=CN, label=图8, caption=地层铀质量分数与统计计数之间的关系, figureFileSmall=pCuiT//yAw2JWNAXshnxzg==, figureFileBig=we1FJM2nSLMzRb3YgX4NYQ==, tableContent=null), ArticleFig(id=1179483448042471630, tenantId=1146029695717560320, journalId=1146123346816638986, articleId=1154015955458970107, language=EN, label=Table 1, caption=

Information on nuclide settings in uranium bearing formations

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元素 核素编号 质量比/% 元素 核素编号 质量比/%
8016 47.74 16000 0.40
14000 24.94 11023 0.30
20000 14.67 22000 0.15
26000 3.52 25055 0.08
13027 3.05 15031 0.04
6012 1.59 92238 4.965×10-2
19000 1.52 90232 4.570×10-3
12000 1.21 92235 3.500×10-4
1001 0.79
), ArticleFig(id=1179483448126357711, tenantId=1146029695717560320, journalId=1146123346816638986, articleId=1154015955458970107, language=CN, label=表1, caption=

含铀地层核素设置信息

, figureFileSmall=null, figureFileBig=null, tableContent=
元素 核素编号 质量比/% 元素 核素编号 质量比/%
8016 47.74 16000 0.40
14000 24.94 11023 0.30
20000 14.67 22000 0.15
26000 3.52 25055 0.08
13027 3.05 15031 0.04
6012 1.59 92238 4.965×10-2
19000 1.52 90232 4.570×10-3
12000 1.21 92235 3.500×10-4
1001 0.79
), ArticleFig(id=1179483448197660880, tenantId=1146029695717560320, journalId=1146123346816638986, articleId=1154015955458970107, language=EN, label=Table 2, caption=

Verification sample simulation calculation results and deviations

, figureFileSmall=null, figureFileBig=null, tableContent=
样品
编号
实际地层铀
质量分数/%
计算地层铀
质量分数/%
铀质量分数
偏差
值/%
相对
偏差/%
1 0.05 0.137 0.087 174
2 0.10 0.131 0.031 31.0
3 0.30 0.343 0.043 14.2
4 0.50 0.541 0.041 8.12
5 0.80 0.771 0.029 3.67
6 1.00 0.967 0.033 3.31
), ArticleFig(id=1179483448264769745, tenantId=1146029695717560320, journalId=1146123346816638986, articleId=1154015955458970107, language=CN, label=表2, caption=

验证样模拟计算结果与偏差

, figureFileSmall=null, figureFileBig=null, tableContent=
样品
编号
实际地层铀
质量分数/%
计算地层铀
质量分数/%
铀质量分数
偏差
值/%
相对
偏差/%
1 0.05 0.137 0.087 174
2 0.10 0.131 0.031 31.0
3 0.30 0.343 0.043 14.2
4 0.50 0.541 0.041 8.12
5 0.80 0.771 0.029 3.67
6 1.00 0.967 0.033 3.31
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基于伴随α中子管的铀裂变瞬发中子符合测井方法模拟研究
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张焱 1, 2, 3 , 张浩然 1, 2, 3 , 刘翅 1, 2, 3 , 胡文兴 1, 2, 3 , 刘世梁 1, 2, 3 , 刘琦 1, 2, 3
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铀矿冶 | 封面文章 2025, 44(2): 1-8
基于伴随α中子管的铀裂变瞬发中子符合测井方法模拟研究
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张焱1, 2, 3, 张浩然1, 2, 3, 刘翅1, 2, 3, 胡文兴1, 2, 3, 刘世梁1, 2, 3, 刘琦1, 2, 3
作者信息
  • 1 东华理工大学 铀资源探采与核遥感全国重点实验室, 江西 南昌 330013
  • 2 东华理工大学 核物理与核技术江西省重点实验室, 江西 南昌 330013
  • 3 东华理工大学 核技术应用教育部工程研究中心, 江西 南昌 330013
  • 张焱(1989—),男,湖北襄阳人,博士,副教授,主要从事核技术及应用方向研究。

通讯作者:

张焱(1989—),男,湖北襄阳人,博士,副教授,主要从事核技术及应用方向研究。
Simulation Study on Uranium Fission Prompt Neutron Coincidence Logging Method Based on Associated Particle Sealed-tube Neutron Generator
Yan ZHANG1, 2, 3, Haoran ZHANG1, 2, 3, Chi LIU1, 2, 3, Wenxing HU1, 2, 3, Shiliang LIU1, 2, 3, Qi LIU1, 2, 3
Affiliations
  • 1 National Key Laboratory of Uranium Resource Exploration and Nuclear Remote Sensing, East China University of Technology, Nanchang 330013, China
  • 2 Jiangxi Key Laboratory of Nuclear Physics and Nuclear Technology, East China University of Technology, Nanchang 330013, China
  • 3 Engineering Research Center for Nuclear Technology Applications, Ministry of Education, East China University of Technology, Nanchang 330013, China
出版时间: 2025-05-20 doi: 10.13426/j.cnki.yky.2024.09.05
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随着全球核能需求的增长,对铀资源分布质量的科学评估以及对铀储量的精确测量工作变得尤为重要。铀裂变瞬发中子测井技术作为重要的铀矿测井勘查手段,具有定量结果不受放射性平衡影响的优势,但其测量准确度受到中子源脉冲宽度与产额的影响。基于伴随α中子管的铀矿测井仪,可通过搭载在中子管上的伴随α探测器,对出射中子的伴随α粒子进行时间和空间上的统计,进而剔除源中子干扰,提升测井准确度。在模拟过程中,为了获取测井过程中的中子出射信息,以及伴随α探测器和超热中子探测器的响应时序信号,提高时序模拟效率,提出了一种结合蒙特卡洛模拟软件与MATLAB软件的响应时序模拟方法。通过合理设置预延迟时间和符合门宽,建立了地层铀质量分数为0~1.00%时,符合计数率与地层铀质量分数的关系曲线。对验证样的计算结果表明,地层铀质量分数的计算值与实际值之间的偏差值优于0.1%;当地层铀质量分数高于0.5%,相对偏差优于10%,该方法整体满足勘查需求,具有较强的铀矿测井应用价值。

伴随α中子管  /  铀矿测井  /  时间序列  /  铀裂变瞬发中子

With the growing global demand for nuclear energy, the evaluation of the quality of uranium resource distribution and the precise measurement of reserves have become increasingly important. The uranium fission prompt neutron logging technology, as a critical tool for uranium ore logging exploration, offers the advantage of providing quantitative results unaffected by radioactive equilibrium. However, the measurement accuracy is influenced by the pulse width and yield of the neutron source. This study utilizes a uranium logging instrument equipped with an associated particle sealed-tube neutron generator, which enables time and spatial statistics of the companion α particles emitted by the outgoing neutrons. This approach helps to eliminate interference from the source neutrons and enhances the accuracy of the logging results. In the simulation process, to obtain information on neutron emissions during logging and the timing signal responses of both the companion α detector and the epithermal neutron detector, we propose a response time simulation method that combines Monte Carlo simulation software with MATLAB. By appropriately setting the pre-delay time and gate width, a relationship curve between the count rate and uranium content in formations with uranium levels ranging from 0 to 1.00% was established. The results from validation samples indicate that the calculated uranium content show a deviation of less than 0.1% from the actual values. When the uranium content in the formation exceeds 0.5%, the relative deviation is within 10%. This method meets the exploration requirements and demonstrates significant application value for uranium ore logging.

associated particle sealed-tube neutron generator  /  uranium mine logging  /  time series  /  uranium fission prompt neutron
张焱, 张浩然, 刘翅, 胡文兴, 刘世梁, 刘琦. 基于伴随α中子管的铀裂变瞬发中子符合测井方法模拟研究. 铀矿冶, 2025 , 44 (2) : 1 -8 . DOI: 10.13426/j.cnki.yky.2024.09.05
Yan ZHANG, Haoran ZHANG, Chi LIU, Wenxing HU, Shiliang LIU, Qi LIU. Simulation Study on Uranium Fission Prompt Neutron Coincidence Logging Method Based on Associated Particle Sealed-tube Neutron Generator[J]. Uranium Mining and Metallurgy, 2025 , 44 (2) : 1 -8 . DOI: 10.13426/j.cnki.yky.2024.09.05
在全球能源结构中,核能占比不断上升,各国对铀资源的需求也日益增加[1],精确测量铀资源的储量和分布是核能产业可持续发展的重要前提和根本保障[2]。随着铀矿勘查工作的深入,地表浅埋藏、易于勘探的矿产资源逐渐减少,勘查工作的重点已转向深部隐伏矿床中的铀资源[3-4]。在铀资源勘查中,铀矿测井是进行铀矿储量测量的重要方法之一[5]1,该工作旨在获取地层铀质量分数、物理特性等信息,用于评估铀矿层品位、边界和厚度等特征[6],从而确定铀矿床的工业开采价值和经济价值,因此须保证测井结果的可靠性和准确性[7]
目前,国内常用自然伽马能谱测井技术作为铀矿测井的主要方法[8],该方法通过测量铀的衰变子体的特征γ射线强度[9],再结合铀镭、镭氡平衡系数解释特征伽马计数与铀矿品位之间的关系,修正测量结果,以间接获取矿层中的铀品位[10]。在放射性不平衡的砂岩型铀矿地区[5]1以及放射性平衡遭到破坏的地浸区[11],使用自然伽马测井已不能准确解释矿层铀资源储量情况。
铀裂变瞬发中子测井技术是一种应用于测井领域的直接测铀方法[12-14],利用工作在脉冲模式下的D-T中子源发射14 MeV的快中子,经井眼中的水及地层将快中子慢化到热中子后,主动激发地层中的铀裂变,再通过中子探测器记录的裂变中子情况对地层中235U的质量分数进行分层解释,具有不受放射性不平衡影响的优势。基于超热中子与热中子比值法的铀裂变瞬发中子测井仪[15],其测量准确度受D-T中子源脉冲宽度和中子产额的影响,进一步提高测量准确度需要更窄脉冲、更高产额的中子源,实现难度较大。基于伴随α中子管与快中子探测器的铀矿测井装置[16],通过伴随α探测器检测在T(d, n)4He反应产生中子过程中伴随产生的α粒子的时间与位置信息,对测量符合门进行选通;再搭配快中子探测器设置能量阈值,对符合门内的中子进行符合测量,以实现对瞬发裂变中子的高效筛选,能够有效提高测量准确度。
本研究基于伴随α中子管铀裂变瞬发中子测井装置模型,提出了一种使用超热中子探测器对测井过程中的中子出射信息,以及伴随α探测器和超热中子探测器响应时序信号进行模拟仿真的方法。通过蒙特卡洛(MC)软件建立装置测井模型,通过MATLAB对测井事件过程中伴随α中子管发射的中子出射信息进行抽样,通过耦合叠加的方式完成对中子出射信息、伴随α探测器和超热中子探测器的响应时序信号获取,进而完成测井过程的全模拟及不同铀质量分数地层中超热中子计数工作曲线的获取。
伴随α中子管与密封管型D-T发生器的基础结构相似,均由氘储存器、离子源、加速与聚集电极、氚靶,以及陶瓷绝缘外壳等组成,用于产生T(d, n)4He反应,发射中子;但伴随α中子管在D-T中子管的基础上增加了伴随α探测器,可通过探测与中子伴随产生的α粒子信息反演出射中子信息;该装置具有发射中子的功能,并能给出中子出射时刻及出射方向的指示[17]1。在碳氧比测井、中子井下成像、核材料检测等领域,该装置已有广泛的应用[18-20]
非测井型伴随α中子管一般采用平面型伴随α探测器,将探测器置于中子辐照位置反方向的侧面,测井装置受井口大小的限制。因此,研究中采用带圆筒型α探测器的测井用中子管[17]2,其通过氚靶后方的环绕型ZnS(Ag)α探测器,探测靶正向方向出射中子的伴随α粒子,探测效率为100%,测井用伴随α中子管结构见图1
在基于超热中子与热中子比值(简称NE/T)的铀裂变瞬发中子测井技术中,采用离子源高压脉冲上升沿作为超热中子计数测量时间窗开启的同步信号,以实现对裂变中子探测信号的提取(图2)。当源中子衰减到不再对超热中子探测器计数有所贡献时,开启测量时间窗;此时,已有大量铀裂变中子信息损失。
理想状态下,伴随α中子管内发生T(d, n)4He反应,中子管同时向外发射一个14 MeV的快中子和一个与中子方向相反的α粒子,见式(1)[22]。当伴随α探测器探测到α粒子时,选通开启测量时间窗;快中子经过与不锈钢外壳、水层及地层发生非弹性散射、弹性散射等作用后逐渐慢化至热中子区,并诱发地层中的235U裂变,发射裂变中子,见式(2)[23]
$ \mathrm{T}+\mathrm{D} \longrightarrow \alpha+\mathrm{n}+17.588 \mathrm{MeV},$
$ \begin{array}{l} { }_{92}^{235} \mathrm{U}+{ }_{0}^{1} \mathrm{n} \longrightarrow\left({ }_{92}^{236} \mathrm{U}\right) * \longrightarrow \\ { }_{Z_{1}^{1}}^{\mathrm{A}_{1}} \mathrm{Y}_{1}+{ }_{Z_{2}^{2}} \mathrm{Y}_{2}+(2 \sim 3){ }_{0}^{1} \mathrm{n}, \end{array}$
式中,${}_{{\mathrm{Z}}_{1}}^{{\mathrm{A}}_{1}}$Y1${}_{{\mathrm{Z}}_{2}}^{{\mathrm{A}}_{2}}$Y2为裂变碎片,部分裂变中子在地层中经过慢化后被其中的核素俘获,而部分裂变中子会被3He管等中子探测器探测到并形成脉冲信号,见图3
伴随α探测器的测量范围有限,仅能对从侧方向进入地层中子的伴随α粒子进行记录。从氚靶正方向和负方向出射的中子,一部分会被屏蔽体吸收;另一部分在地层中经诱发裂变产生裂变中子,由于受到其与探测器距离的影响,裂变中子相较于伴随α探测器测量范围内的中子对探测器计数的贡献较小,经伴随α信号选通测量时间窗后其影响可忽略。
在基于伴随α中子管的铀矿测井中,认为铀裂变中子衰减在统计上符合Rossi-α原理,但测量时间窗(符合门)的触发不再依赖于中子发生器的同步信号。当α探测器探测到信号后,直接选通一次测量时间窗(符合门),经过一段时间的预延迟[24]后,α粒子的符合中子已经消失,不会被探测到,后续信号来源于其他源中子与地层中铀的裂变中子;再根据源中子与裂变中子的衰减时间(τ)的区别,判断超热中子计数符合门的开启时间,并对该时间节点后的有效符合门信息进行统计,完成一个周期内的计数统计(图4)。
伴随α中子管与3He管间的距离、屏蔽体的材料与厚度、中子管的工作模式与产额均会对测量的准确度与精度造成影响,各部分之间非线性响应,不易通过理论推导方式进行优化,一般通过模拟仿真方式对装置进行优化设计。
传统模拟方式仅对最终的测量结果进行统计,各部分时序信号间的关系符合统计规律;但在基于伴随α中子管的铀矿测井装置中,符合门选通以及信号间耦合方式采用各探测器信号间的时序规律确认。因此,建立基于伴随α中子管的铀裂变瞬发中子符合测井中探测器间信号的时序重建方法至关重要。
根据图1设计的基于伴随α中子管的铀矿测井仪简化模型,见图5(a)。其主体结构从上到下包括含伴随α探测器的D-T中子发生器、源中子屏蔽体、远近端3He管以及外部不锈钢外壳5部分。3He管从外向内分别包裹1 mm厚的镉和5 mm厚的聚乙烯,用于屏蔽吸收热中子及用于慢化进入探测器的超热中子,以形成超热中子探测器结构,提高图4中超热中子探测器信号时序分析过程中源中子和裂变中子的区分效率。
利用MC软件建立的测井结构示意图见图5(b)。测井仪是直径9.8 cm、长200.0 cm的圆柱体;底部是2个直径5.0 cm、长26.2 cm的超热中子探测器(含3He管、聚乙烯和镉),用于对地层中的超热中子信息进行记录,两探测器间距为15 cm(3He管电子学部分长度)。砂岩地层是直径300.0 cm、长300.0 cm的圆柱体,大于测量饱和厚度;井口直径为15.0 cm,测井仪与地层空隙间用水进行填充。地层中铀质量分数设置在0~1.00%。模拟并记录探测器中3He俘获的中子信息。
参考美国太平洋西北国家实验室(Pacific Northwest National Laboratory)给定的材料组分信息[25]设置模型中的材料组分,采用ENDF/B-VIII.0评价核数据库中相关核素的反应完成模拟。以铀质量分数为0.05%的地层为例,核素设置信息见表1
采用MC软件与MATLAB进行测井中重要时序信息的模拟,流程见图6(a)。通过设置源中子的出射方向,获取不同方向上中子出射到3He管捕获之间的时间(捕获时间,tc),建立中子出射方向的3He管响应数据集[26]
数据集整合后导入MATLAB中,通过编程实现对发生器不同模式(直流/脉冲)下中子的出射时间(t0)的抽样,将tct0进行合并后按时间顺序进行排序;再根据伴随α探测器的探测范围划分出α探测器的响应时间序列,完成对中子出射信息,以及伴随α探测器和超热中子探测器的响应时序信号获取的模拟仿真[27]
在脉宽50 μs、周期2 ms的脉冲模式时间序列模拟中,设置中子产额为3×107 n/s,获得的中子出射时间谱、α粒子符合中子时间谱以及3He管探测信号时间谱见图6(b)中①、②、③,单位时间内信号统计的波形及计数均符合要求。0~4 000 μs的中子出射时间统计见图6(c),根据该结果,程序能很好地完成出射时间的模拟,并记录不同时间段、各部分间的计数情况。任意脉冲模式下0~100 μs间伴随α探测器与3He管的响应信号时序信息见图6(d),图中灰色部分为伴随α探测器一个测量周期内的响应信息,代表中子出射时间信息;红色部分为3He管一个周期内的计数响应时序。
在获取各部分时序信息后,需要对不同铀质量分数地层的测量结果进行统计分析。根据图6(d),分别对地层铀质量分数为0与1.00%的模型进行100 s测量模拟后,对3He管探测到的源中子与裂变中子的中子捕获时间信息进行归一化统计(图7)。在该超热中子探测器结构下,源中子在出射后,3He管对其响应在40 μs时基本为0,而对于裂变中子其响应时间最长达1 000 μs。
根据图7中不同来源超热中子的衰变情况,在一个中子发射后的40~50 μs内,3He管对源中子的响应基本为0。当中子源脉宽为50 μs时,以伴随α探测器信号作为触发信号,开启一次符合测量事件;设置预延迟时间为40 μs,经过预延迟后打开符合门进行统计;符合门宽设置为800 μs,进行超热中子计数统计,根据图4中的原理进行计数区间的获取并确定区间内总的信号数量。单次模拟测量3 s,重复3次,计算得到不同地层铀质量分数与符合计数率的关系(图8)。图8中红色曲线为探测器符合计数率与地层铀质量分数关系的拟合曲线。根据该拟合工作曲线,对6组验证样本中地层的铀质量分数进行了计算,结果见表2
对于地层铀质量分数高于0.05%的地层,基于伴随α中子管的铀裂变瞬发中子符合测井方法的计算结果与实际值之间的偏差值均小于0.1%,铀质量分数较低时相对偏差较大;随着地层铀质量分数的增加,计算值与实际值之间的相对偏差逐渐减小;地层铀质量分数高于0.5%时,相对偏差优于10%,该方法整体满足测量需求。
基于伴随α中子管的铀裂变瞬发中子符合测井方法,提出了一种结合蒙特卡洛模拟软件与MATLAB编程的方法,实现对基于伴随α中子管铀裂变瞬发中子测井装置关键响应时序信号的模拟。区别于传统测井模拟方法,该方法不再获取数据统计结果,直接获取探测器中3He的中子捕获信息,在MATLAB中进行重新抽样与时序排列,保证了时间序列的随机性与模拟结果的泛用性;在获取中子捕获时间信息后,变化预延迟时间、符合门宽等测量参数,不需要用蒙特卡洛软件进行重新模拟,提高了模拟效率。
在实现时间序列模拟的基础上,建立了地层铀质量分数为0~1.00%地层测量符合计数率与铀质量分数之间的工作曲线,通过对6组地层验证样(铀质量分数在0~1.00%)中铀质量分数实际值与计算结果之间的偏差分析,验证了方法的可行性,计算结果与实际值的偏差值优于0.1%;在地层铀质量分数高于0.5%时,相对偏差优于10%,该方法整体满足铀矿测井需求。后续可采用快中子探测器,提高直流区分过程的响应中子能量,以提高区分效率。该方法对基于伴随α中子管的铀矿测井时序分析研究具有重要意义。
  • 国家自然科学基金(42374226)
  • 江西省学科学术和技术带头人培养项目(20232BCJ23006)
  • 江西省自然科学基金项目(20232BAB201043)
  • 江西省自然科学基金项目(20243BCE51132)
  • 铀资源探采与核遥感全国重点实验室(东华理工大学)(2024QZ-TD-09)
  • 东华理工大学青年人才托举(DHTJBJ202402)
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2025年第44卷第2期
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doi: 10.13426/j.cnki.yky.2024.09.05
  • 接收时间:2024-09-11
  • 首发时间:2025-07-21
  • 出版时间:2025-05-20
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  • 收稿日期:2024-09-11
基金
国家自然科学基金(42374226)
江西省学科学术和技术带头人培养项目(20232BCJ23006)
江西省自然科学基金项目(20232BAB201043)
江西省自然科学基金项目(20243BCE51132)
铀资源探采与核遥感全国重点实验室(东华理工大学)(2024QZ-TD-09)
东华理工大学青年人才托举(DHTJBJ202402)
作者信息
    1 东华理工大学 铀资源探采与核遥感全国重点实验室, 江西 南昌 330013
    2 东华理工大学 核物理与核技术江西省重点实验室, 江西 南昌 330013
    3 东华理工大学 核技术应用教育部工程研究中心, 江西 南昌 330013

通讯作者:

张焱(1989—),男,湖北襄阳人,博士,副教授,主要从事核技术及应用方向研究。
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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