Radiation Physics and Chemistry最新文献_第3页

Proton absorbed dose from laser-accelerated proton beamline (LAP) based on RPA method 基于RPA方法的激光加速质子束线（LAP）的质子吸收剂量

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113700

S.A. Mahdipour , M. Shafeei Sarvestani , S.B. Dabagov , A. Molavi

Radiation Pressure Acceleration (RPA) and Target Normal Sheath Acceleration (TNSA) are the two most significant methods for designing Laser-Accelerated Proton Beam (LAP) systems. LAP technology has inspired innovative applications that leverage the unique properties of proton bunches, distinguishing them from conventionally accelerated proton beams. In previous simulations, we presented a fundamental model of the proton beamline based on two pulsed-power solenoids, utilizing Monte Carlo simulations with the GEANT4 toolkit. We conducted adjustments to the magnetic field of the first solenoid and precisely calculated the flux of primary protons and secondary radiations in the beamline. This article introduces the second solenoid, providing detailed specifications and incorporating it into the previous simulations, optimizing its magnetic field. Additionally, the absorbed dose from RPA protons in a water phantom has been calculated. The simulation results demonstrated that incorporating and optimizing the second solenoid within the beamline significantly enhanced proton beam energy selection and shaping. This optimization effectively filtered out lower-energy protons, reduced the effective energy spread, and consequently shifted the maximum dose deposition to a greater depth within the water phantom. Furthermore, as the incident energy dispersion decreased, the dose profile became more concentrated, and the width of the high-dose region was reduced. Analysis of secondary neutron and photon doses also revealed that controlling the incident proton energy spectrum has a pronounced effect on reducing secondary photon doses. The calculations presented in this paper constitute a preliminary step toward completing the full RPA beamline simulation model.

辐射压力加速（RPA）和靶正常鞘层加速（TNSA）是设计激光加速质子束（LAP）系统的两种最重要的方法。LAP技术激发了创新的应用，利用质子束的独特特性，将它们与传统的加速质子束区分开来。在之前的模拟中，我们提出了一个基于两个脉冲功率螺线管的质子束线的基本模型，利用蒙特卡罗模拟和GEANT4工具包。我们对第一个螺线管的磁场进行了调整，并精确计算了光束线中初级质子和次级辐射的通量。本文介绍了第二个螺线管，提供了详细的规格，并将其纳入前面的模拟，优化其磁场。此外，还计算了水影中RPA质子的吸收剂量。仿真结果表明，将第二螺线管引入并优化后，可以显著提高质子束的能量选择和成形能力。这种优化有效地过滤掉了低能量的质子，减少了有效能量扩散，从而将最大剂量沉积转移到水模体内更深的地方。此外，随着入射能量色散的减小，剂量分布更加集中，高剂量区宽度减小。对二次中子和光子剂量的分析也表明，控制入射质子能谱对降低二次光子剂量有显著的效果。本文提出的计算是完成全RPA波束线模拟模型的初步步骤。

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引用次数: 0

Effect of Pb2+ substitution with Bi3+ on γ-ray shielding and mechanical properties of B2O3–PbO–BaO–ZnO–CaO–Bi2O3 glass Bi3+取代Pb2+对B2O3-PbO-BaO-ZnO-CaO-Bi2O3玻璃屏蔽γ射线及力学性能的影响

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113710

Mohammad Marashdeh , Esraa H. Abdel-Gawad , Hanan Akhdar , Ali M. Hedaya , Mohamed Elsafi

Developing glass materials that combine reliable mechanical properties with high competence in radiation protection is important. In this research, four glass samples with compositions 40 B₂O₃: (20 − x) PbO: 15 BaO: 10 CaO: 15 ZnO: x Bi₂O₃ (x = 0, 5, 10, 20%) were prepared by melt quenching. An HPGe detector was used to determine γ-ray shielding parameters within the energies emitted from ²⁴¹Am, ¹³⁷Cs, ⁶⁰Co sources. At 0.060 MeV it was found that the linear attenuation coefficient (LAC) increased from 16.106 cm⁻¹ for the sample with zero % Bi₂O₃ to 21.183 cm⁻¹ for the sample with 20% Bi₂O₃. Additionally, a reduction in half-value length (HVL) was observed with increasing Bi₂O₃ concentration within the glass matrix. These findings highlight the role of Bi₂O₃ in augmenting the glass attenuation performance against γ-ray radiation. The improved γ-ray shielding efficiency was attributed to increased homogeneity of the glass matrix with higher Bi₂O₃ content. Simulation and theoretical results closely matched experimental measurements, confirming the accuracy of the evaluation methods. Mechanical moduli were derived by the application of Makishima-Mackenzie's theory. Mechanical tests indicated that the glass maintained acceptable mechanical properties despite Bi₂O₃ substitution. While Bi₂O₃ substitution significantly improved γ-ray shielding, mechanical tests confirmed that the glass maintained suitable structural properties for practical applications.

开发既具有可靠的机械性能又具有高辐射防护能力的玻璃材料非常重要。在本研究中，采用熔体淬火法制备了4种成分为40 B2O3:(20−x) PbO: 15 BaO: 10 CaO: 15 ZnO: x Bi2O3 （x = 0,5,10,20 %）的玻璃样品。用HPGe探测器测定了241Am， 137Cs， 60Co源发射能量范围内的γ射线屏蔽参数。在0.060 MeV时，线性衰减系数（LAC）从含0% Bi2O3样品的16.106 cm−1增加到含20% Bi2O3样品的21.183 cm−1。此外，随着玻璃基体中Bi2O3浓度的增加，观察到半值长度（HVL）减少。这些发现突出了Bi2O3在增强玻璃抗γ射线辐射衰减性能方面的作用。随着Bi2O3含量的增加，玻璃基体的均匀性提高，从而提高了γ射线屏蔽效率。仿真结果与理论结果吻合较好，验证了评价方法的准确性。应用Makishima-Mackenzie的理论推导出了机械模量。力学试验表明，尽管Bi2O3取代，玻璃仍保持可接受的力学性能。虽然Bi2O3取代显著改善了γ射线屏蔽，但机械测试证实，该玻璃在实际应用中保持了合适的结构性能。

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引用次数: 0

Radiation of twisted photons in elliptical multifrequency undulators 椭圆多频波动器中扭曲光子的辐射

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113701

O.V. Bogdanov , S.V. Bragin , P.O. Kazinski , V.A. Ryakin

The theory of radiation of twisted photons in elliptical multifrequency undulators is developed. It is shown that helical multifrequency undulators can be employed as a bright and versatile source of photons in the states that are superpositions of the modes with definite projection of total angular momentum (TAM), amplitude, and relative phase. All these parameters of the state are readily controlled by the undulator design. The explicit expression for the amplitude of radiation of a twisted photon from a charged particle in the multifrequency undulator is derived. The energy spectrum of radiation and the selection rules for the TAM projection of radiated photons are described. The symmetry properties of the spectrum with respect to the TAM projection are established. The interpretation to the energy spectrum and to the selection rules is given in terms of virtual photons mediating between the charged particle and the undulator. The results obtained are also applicable to radiation of twisted photons produced by ultrarelativistic charged particles moving in plane multifrequency electromagnetic waves.

建立了椭圆多频波动器中扭曲光子的辐射理论。结果表明，在具有确定的总角动量（TAM）、振幅和相对相位投影的模式叠加态中，螺旋多频波动器可以作为明亮和通用的光子源。所有这些状态参数都易于通过波动器设计来控制。导出了多频波动器中带电粒子的扭曲光子辐射幅值的显式表达式。描述了辐射能谱和辐射光子TAM投影的选择规则。建立了谱相对于TAM投影的对称性。利用虚光子在带电粒子和波动子之间的中介作用，对能谱和选择规则进行了解释。所得结果也适用于平面多频电磁波中运动的超相对论性带电粒子所产生的扭曲光子辐射。

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引用次数: 0

Artificial neural network optimization of radiation-induced graft polymerization for heavy metal adsorbents 重金属吸附剂辐射接枝聚合的人工神经网络优化

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113712

John Paolo L. Lazarte, Jordan F. Madrid, John Andrew A. Luna, Patrick Jay E. Cabalar

Degree of grafting is an important performance indicator when developing heavy metal adsorbents through radiation-induced graft polymerization (RIGP). In this study, artificial neural network (ANN) models were developed to predict the degree of grafting using monomer concentration, surfactant/monomer ratio, absorbed dose, dose rate, and grafting time. A total of 1820 observations from experiments on electron beam RIGP of glycidyl methacrylate (GMA) onto polypropylene nonwoven fabric (PP NWF) at 40 °C were used, 70% of which were randomly selected for training, 15% for validation, and another 15% for testing. The performance of each model was measured and compared with each other using the R value and mean squared error (MSE). Based on the R and MSE values obtained, using all the five parameters as predictors is still more effective than individually using the parameters. The optimized ANN model based on the five input parameters as predictors has an MSE value of 239.3584, which translates to 66 to 86% reduction in prediction error compared to single-parameter models. Aside from degree of grafting prediction, the ANN model provides significant insight into the relative impacts of each input parameter. The three most impactful parameters based on the optimized ANN are: monomer concentration – 29%, absorbed dose – 23%, and grafting time – 22%. Hence, developing adsorbents based on RIGP should focus on optimizing the combination of all five parameters, with strong consideration on these three parameters. Kinetic and diffusion studies are thus recommended to deepen understanding and arrive at a theoretical model for degree of grafting prediction.

接枝度是辐射诱导接枝聚合制备重金属吸附剂的重要性能指标。在本研究中，建立了人工神经网络（ANN）模型，利用单体浓度、表面活性剂/单体比、吸收剂量、剂量率和接枝时间来预测接枝程度。利用40℃下甲基丙烯酸甘油酯（GMA）在聚丙烯非织造布（PP NWF）上的电子束RIGP实验的1820个观测值，随机抽取70%用于训练，15%用于验证，15%用于测试。使用R值和均方误差（MSE）对每个模型的性能进行测量和比较。根据获得的R和MSE值，使用所有五个参数作为预测因子仍然比单独使用参数更有效。基于5个输入参数作为预测因子的优化ANN模型的MSE值为239.3584，与单参数模型相比，预测误差降低了66 ~ 86%。除了嫁接预测的程度外，人工神经网络模型还提供了对每个输入参数的相对影响的重要见解。基于优化后的人工神经网络的三个影响最大的参数是：单体浓度- 29%，吸收剂量- 23%，接枝时间- 22%。因此，基于RIGP的吸附剂开发应重点优化这5个参数的组合，重点考虑这3个参数。因此，建议进行动力学和扩散研究，以加深理解并得出接枝程度预测的理论模型。

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引用次数: 0

Radiation Shielding and Physical Properties of ZrO2-Modified Borosilicate Glasses: A Monte Carlo, Theoretical, and AI-Based Study zro2修饰硼硅酸盐玻璃的辐射屏蔽和物理性能：基于蒙特卡罗、理论和人工智能的研究

IF 2.9 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113698

Nuray Yavuzkanat, Turan Şahmaran

引用次数: 0

Simulation of Radiological Parameters for boron oxide reinforced Glasses 氧化硼增强玻璃放射学参数的模拟

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-09 DOI: 10.1016/j.radphyschem.2026.113706

Mucize Sarıhan , Seher Polat , Sabiha Anas Boussaa , Iskender Akkurt

Computer simulation is an important and valuable method to obtain any paramaters from engineering to medical sciences. Using radiation in technology required extra care in order not to be exposed especially for ionizing raidation. Monte Carlo simulation is an easy method to obtain radiation shielding properties of any materials. The glass materials are widely used and thus their some properties should be investigated. In the present work, the gamma-neutron shielding properties of boron-oxide glasses were calculated using Phy-X/PSD code. The composition of gass samples formualted as (45-x)SiO₂+xB₂O₃+24.5Na₂O+24.5CaO+6P₂O₅ (where x ranged from 0, 1, 3 and 5 mol% steps) and used in this study.

从工程到医学，计算机仿真是获取各种参数的重要而有价值的方法。在技术中使用辐射需要格外小心，以免受到辐射，尤其是电离辐射。蒙特卡罗模拟是一种获得任何材料的辐射屏蔽性能的简便方法。玻璃材料的应用十分广泛，因此需要对其某些性能进行研究。本文利用Phy-X/PSD程序计算了氧化硼玻璃的γ -中子屏蔽性能。气体样品组成为（45-x）SiO2+xB2O3+24.5Na2O+24.5CaO+6P2O5（其中x为0、1、3和5 mol%步长），并用于本研究。

引用次数: 0

Deposition of radioactive admixture on aerosol nano particles 放射性外加剂在气溶胶纳米粒子上的沉积

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-09 DOI: 10.1016/j.radphyschem.2026.113709

V.A. Zagaynov , М.Е. Vasyanovich , A.A. Lushnikov , I.E. Agranovski , A.A. Maslov , V.V. Maksimenko , V. Nagibin , V. Krivosheev , D.K. Zagaynov

The paper develops a model of the process of radioactive impurities deposition on aerosol particles of various sizes. For this purpose, the following problem was solved; aerosol particles are introduced into a gas system in which there is a source of radioactivity and radioactive atoms are uniformly distributed over space. It is assumed that when these radioactive atoms collide with particles, these atoms are deposited on the particles and transfer their activity to them. These processes lead to the distribution of the radioactive impurity on the particles. To find this distribution function, a system of differential equations describing the process was solved by introduction generation function. The characteristic times for the systems to reach the stationary regime were determined, and the distributions for the stationary regime were obtained. To illustrate the results obtained, an example for monodisperse aerosol particles that collide with radioactive atoms with the same decay constant has been discussed. At the same time the distribution function was obtained by numerical methods. Numerical and exact solutions are coincided. It must also be noted that the problem can be generalized to particles with a polydisperse distribution and to a system of atoms with different decay constants using numerical solution. The proposed method can be used both for radioactive systems operating in normal mode and for emergency situations.

本文建立了放射性杂质在不同大小的气溶胶颗粒上沉积过程的模型。为此，解决了以下问题：气溶胶粒子被引入一个气体系统，其中有一个放射性源，放射性原子在空间上均匀分布。据推测，当这些放射性原子与粒子碰撞时，这些原子沉积在粒子上并将其活性转移给粒子。这些过程导致放射性杂质在粒子上的分布。为求出该分布函数，采用引入生成函数求解了描述该过程的微分方程组。确定了系统达到平稳状态的特征时间，得到了平稳状态的分布。为了说明所得到的结果，讨论了一个单分散气溶胶粒子与具有相同衰变常数的放射性原子碰撞的例子。同时用数值方法得到了分布函数。数值解和精确解是一致的。还必须注意的是，这个问题可以推广到具有多分散分布的粒子和具有不同衰变常数的原子系统。所提出的方法既可用于在正常模式下运行的放射性系统，也可用于紧急情况。

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引用次数: 0

Structural modification and enhanced radiation shielding in Nd2O3-doped borophosphate glasses: A combined FTIR, density, and Phy-X/PSD analysis 掺nd2o3硼磷酸盐玻璃的结构修饰和增强辐射屏蔽：FTIR、密度和Phy-X/PSD综合分析

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-09 DOI: 10.1016/j.radphyschem.2026.113687

O.E. Ziada , M.S. Meikhail , A.M. Abdelghany

Introduced work addresses the research gap concerning the structural role and radiation-shielding influence of Nd₂O₃ within multi-component borophosphate glasses, which are promising candidates for lead-free, transparent radiation shielding. A series of glasses with composition (35-x)B₂O₃–30Na₂O–30P₂O₅–5Bi₂O₃-xNd₂O₃ (where x = 0, 0.1, 0.25, 0.5, 0.75, 1 mol%) were synthesized via the melt-quenching technique at 1100 °C. Their amorphous nature was confirmed by XRD, while FTIR spectroscopy coupled with deconvolution analysis was employed to probe structural modifications. Physical properties, including density, molar volume, and oxygen packing density, were measured experimentally. Gamma-ray and neutron shielding parameters were comprehensively evaluated over 0.015–15 MeV using the Phy-X/PSD software. The results reveal a consistent densification of the glass network with Nd₂O₃ addition: density increased from 2.82 to 3.02 g cm^-3, while molar volume decreased from 38.596 to 36.924 cm³ mol^-1. The fraction of four-coordinated boron (N₄) remained nearly constant (∼0.83–0.84), indicating Nd₂O₃ acts primarily as a modifier without disrupting the established boron coordination equilibrium. Significant improvements in radiation shielding were observed: the linear attenuation coefficient at 0.015 MeV rose from 72.8 to 82.3 cm^-1, and the half-value layer at 15 MeV decreased from 9.154 to 8.368 cm. The fast neutron removal cross-section also increased from 0.0930 to 0.0978 cm^-1 with Nd₂O₃ doping. Results reveal that Nd₂O₃ incorporation enhances glass compactness and radiation attenuation without inducing major structural reorganization. The sample with 1 mol% Nd₂O₃ (Nd1) exhibited the most promising shielding performance, combining high density, low photon penetration, and effective neutron attenuation. These findings provide a clear structure–property relationship essential for designing efficient, non-toxic, and transparent radiation shielding glasses for medical, industrial, and nuclear applications.

介绍的工作解决了关于Nd2O3在多组分硼磷酸盐玻璃中的结构作用和辐射屏蔽影响的研究空白，硼磷酸盐玻璃是无铅透明辐射屏蔽的有前途的候选者。采用熔体淬火技术，在1100℃下合成了组成为（35-x） b2o3 - 30na20 - 30p2o5 - 5bi2o3 - xnd2o3 （x = 0、0.1、0.25、0.5、0.75、1 mol%）的玻璃。XRD证实了它们的无定形性质，FTIR光谱结合反褶积分析证实了它们的结构修饰。物理性质，包括密度、摩尔体积和氧堆积密度，通过实验测量。利用Phy-X/PSD软件对0.015-15 MeV范围内的伽玛射线和中子屏蔽参数进行了综合评价。结果表明，添加Nd2O3后，玻璃网络致密化程度一致，密度从2.82 g·cm-3增加到3.02 g·cm-3，而摩尔体积从38.596减小到36.924 cm3·mol-1。四配位硼（N4）的分数几乎保持不变（~ 0.83-0.84），表明Nd2O3主要作为一种调节剂而不破坏已建立的硼配位平衡。在0.015 MeV下的线性衰减系数从72.8 cm-1上升到82.3 cm-1，在15 MeV下的半值层从9.154 cm下降到8.368 cm。掺Nd2O3后，快中子去除截面由0.0930 cm-1增加到0.0978 cm-1。结果表明，Nd2O3的掺入增强了玻璃的致密性和辐射衰减，但没有引起主要的结构重组。含有1 mol% Nd2O3 （Nd1）的样品具有高密度、低光子穿透和有效中子衰减的特点，具有较好的屏蔽性能。这些发现为设计用于医疗、工业和核应用的高效、无毒、透明的辐射屏蔽玻璃提供了明确的结构-性能关系。

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引用次数: 0

Mechanism of photon emission from TiO2 irradiated by swift heavy ion Swift重离子辐照TiO2的光子发射机理

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-09 DOI: 10.1016/j.radphyschem.2026.113704

Q.M. Xu , X.Z. Tang , L. Zhang , Z.Y. Hong , J. Gou , Y. Song , W. Cheng , G.X. Wang , S.Y. Liu , K.K. Ding , C.H. Zhang

Titanium dioxide (TiO₂) is a very promising photoelectric material. The research on its optical properties and energy levels is of great significance. Radiation-induced luminescence has been used to study the photon-emission mechanism and its energy levels. The emission spectra from TiO₂ single crystals and doped TiO₂:X (Cr, Fe) ceramics induced by 479 MeV Xe²⁹⁺ ion irradiation at room temperature are obtained. In the spectrum, the multi-peak Gaussian fitting results are in agreement with the calculated energy levels. In the spectra from TiO₂ single crystals, the emission band at 2.24 eV from the transition of Γ₅→Γ₃ in the conduction band, and other bands at 1.91, 1.75, 1.64, and 1.53 eV from the energy level in the valence band, are observed. The results show that the electrons undergo cascade transitions, resulting in photon emission. The emission spectra of TiO₂:X ceramics are related to the doping elements. The results indicate that the mechanism of ion radiation-induced luminescence is different from photoluminescence.

二氧化钛（TiO2）是一种非常有前途的光电材料。对其光学性质和能级的研究具有重要意义。辐射致发光已被用于研究光子发射机制及其能级。得到了室温下479 MeV Xe29+离子辐照下TiO2单晶和掺杂TiO2:X （Cr, Fe）陶瓷的发射光谱。在光谱中，多峰高斯拟合结果与计算的能级吻合较好。在TiO2单晶的光谱中，在导带Γ5→Γ3跃迁的2.24 eV和价带能级的1.91、1.75、1.64和1.53 eV处观察到发射带。结果表明，电子发生级联跃迁，导致光子发射。TiO2:X陶瓷的发射光谱与掺杂元素有关。结果表明，离子辐射致发光的机理与光致发光不同。

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引用次数: 0

Systematic investigation of the shielding performance of 26 types of concrete in three accelerator radiation environments: an 18-MeV proton medical cyclotron, a 250-MeV proton therapy machine, and a 400-MeV/u carbon-ion therapy machine 系统研究了26种混凝土在18 mev质子医用回旋加速器、250 mev质子治疗机和400 mev /u碳离子治疗机三种加速器辐射环境下的屏蔽性能

IF 2.8 3区物理与天体物理 Q3 CHEMISTRY, PHYSICAL

Radiation Physics and Chemistry

Pub Date : 2026-02-08 DOI: 10.1016/j.radphyschem.2026.113705

Po-Wen Fang , Kah-Yeen Lim , Rong-Jiun Sheu

Different types of concrete have different compositions and therefore may exhibit greatly different shielding performances. This study systematically and quantitatively analyzed this problem by numerically simulating 26 types of concrete used as a shield against the radiation fields induced by three accelerators: an 18-MeV proton cyclotron for radioisotope production, a 250-MeV proton therapy machine, and a 400-MeV/u carbon-ion therapy machine. The results were compiled and explored from various perspectives to identify correlations with concrete properties such as density, average atomic number, hydrogen content, and heavy metal content. Among these properties, density was found to be optimal predictor of dose attenuation length in concrete. Best-fit parameters were determined for three accelerator radiation fields in the forward and lateral directions. The data present in this study can be used to quantify the effect of uncertainty in the modeling of concrete composition in shielding calculations.

不同类型的混凝土具有不同的成分，因此可能表现出很大不同的屏蔽性能。本研究系统、定量地分析了这一问题，通过数值模拟26种混凝土屏蔽三种加速器产生的辐射场，这三种加速器分别是18 mev质子回旋加速器、250 mev质子治疗机和400 mev /u碳离子治疗机。从不同的角度对结果进行整理和探索，以确定与混凝土特性（如密度、平均原子序数、氢含量和重金属含量）的相关性。在这些特性中，密度被发现是混凝土中剂量衰减长度的最佳预测因子。确定了正向和横向三个加速器辐射场的最佳拟合参数。本研究中的数据可用于量化屏蔽计算中混凝土成分建模中不确定性的影响。

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引用次数: 0