Radiation Physics and Chemistry最新文献_第3页

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 : 2026-06-01 Epub 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

Validation of an alanine-based postal dosimetry audit system for radiotherapy quality assurance 基于丙氨酸的放射治疗质量保证邮政剂量学审核系统的验证

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-02-10 DOI: 10.1016/j.radphyschem.2026.113696

Arícia Ravane Pereira da Cruz , Lucas Delbem Albino , Ernesto Roesler , Claudio Castelo Branco Viegas , Gabriel Henrique Rocha Barreto de França , Josemary Angélica Corrêa Gonçalves , Carmen Cecília Bueno , Vinícius Saito Monteiro de Barros , Viviane Khoury Asfora

In radiotherapy practice, external dosimetry audits represent a valuable tool for identifying systematic errors, improving the quality and safety of treatments, and ensuring consistency in clinical dosimetry procedures. Despite their proven importance, many radiotherapy centers are still unable to access these audits, especially in resource-constrained settings. With this in mind, the present study aimed to validate an independent postal dosimetry audit service for photon radiotherapy, currently being developed at the Department of Nuclear Energy of Federal University of Pernambuco (DEN/UFPE), using alanine-EPR dosimeters. The proposed system features a structure designed to support six dosimeter holders simultaneously, allowing the evaluation of central-axis and off-axis dose, as well as quality index, flatness and symmetry of photon beams generated by linear accelerators. The system's performance was assessed by comparing measurements from the DEN/UFPE QA setup with results from the TLD-based dosimetry audit program of the Brazilian National Cancer Institute (PQRT/INCA) and with reference data obtained using a PTW 30013 ionization chamber under identical irradiation conditions. The interlaboratory comparison results demonstrated agreement among the systems, with dose deviations relative to the ionization chamber not exceeding 2.0% for the DEN/UFPE system and 1.9% for the PQRT/INCA system. Therefore, these findings provide robust evidence supporting the reliability, accuracy, and overall effectiveness of the proposed alanine-based postal dosimetry audit system, confirming its suitability for clinical implementation.

在放射治疗实践中，外部剂量学审计是识别系统错误、提高治疗质量和安全性以及确保临床剂量学程序一致性的有价值的工具。尽管其重要性已得到证实，但许多放疗中心仍然无法获得这些审计，特别是在资源有限的情况下。考虑到这一点，本研究旨在验证目前正在伯南布哥联邦大学核能系（DEN/UFPE）开发的使用丙氨酸- epr剂量计的光子放射治疗的独立邮政剂量学审计服务。该系统具有同时支持6个剂量计支架的结构，允许评估中心轴和离轴剂量，以及线性加速器产生的光子光束的质量指数、平坦度和对称性。通过将DEN/UFPE QA装置的测量结果与巴西国家癌症研究所（PQRT/INCA）基于tld的剂量学审计项目的结果进行比较，以及在相同辐照条件下使用PTW 30013电离室获得的参考数据，评估了该系统的性能。实验室间比较结果表明，系统之间的一致性，DEN/UFPE系统相对于电离室的剂量偏差不超过2.0%，PQRT/INCA系统不超过1.9%。因此，这些发现提供了强有力的证据，支持建议的基于丙氨酸的邮政剂量学审计系统的可靠性、准确性和整体有效性，确认其适合临床实施。

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引用次数: 0

Quantification of ionic migration in TlBr gamma-ray detector via temperature-dependent conductivity measurements 通过温度相关电导率测量的TlBr伽玛射线探测器中离子迁移的量化

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-01-20 DOI: 10.1016/j.radphyschem.2026.113652

Beomjun Park , Jiwon Seo , Ill Hyuk Han , Jihwan Boo , Jangwon Byun , Seungho Song , Dakyoung Lee , Joo-Hong Lee , Jin-Wook Lee , Jung-Yeol Yeom , Geehyun Kim

Thallium bromide (TlBr) is a promising room-temperature gamma-ray detector material owing to its high atomic number, wide bandgap, and relatively simpler crystal growth process than CdTe-based crystals. However, its practical application is hindered by ionic migration and polarization effects that degrade long-term stability under high bias voltages. In this work, we present a quantitative methodology to evaluate ionic transport in TlBr detectors through temperature-dependent conductivity measurements in the 193–323 K range. By separating electronic and ionic contributions under both current- and voltage-bias conditions, we extracted ionic conductivity values and determined the activation energy of ion migration. The activation energy varied with the vertical position of zone-refined TlBr ingots. These values were correlated with device performance, including photocurrent degradation under X-ray irradiation and peak channel shifts in gamma-ray spectra. The results reveal that ionic migration critically impacts charge collecting ability and spectral stability. This study proposed a standardized framework for quantifying ionic migration in TlBr detectors, offering valuable guidance for evaluating the operational stability in TlBr detectors. The activation energy of ion migration can serve as a robust metric for quantitatively comparing compound semiconductor detectors, whose ions migrate.

溴化铊（TlBr）具有原子序数高、带隙宽、晶体生长过程相对简单等优点，是一种很有前途的室温伽马射线探测器材料。然而，它的实际应用受到离子迁移和极化效应的阻碍，这些效应会降低高偏置电压下的长期稳定性。在这项工作中，我们提出了一种定量方法，通过在193-323 K范围内的温度相关电导率测量来评估TlBr探测器中的离子传输。通过分离电流和电压偏置条件下的电子和离子贡献，我们提取了离子电导率值，并确定了离子迁移的活化能。区域精炼TlBr坯料的活化能随其垂直位置的变化而变化。这些值与器件性能相关，包括x射线照射下的光电流退化和伽马射线能谱中的峰值通道移位。结果表明，离子迁移严重影响电荷收集能力和光谱稳定性。本研究提出了一种量化TlBr探测器中离子迁移的标准化框架，为评价TlBr探测器的运行稳定性提供了有价值的指导。离子迁移活化能可以作为定量比较离子迁移的化合物半导体探测器的可靠指标。

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引用次数: 0

Resistance of refractory high-entropy alloys to ultrafast laser irradiation 难熔高熵合金对超快激光辐照的抗性

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.radphyschem.2026.113694

Nikita Medvedev

Response of refractory high-entropy alloys MoNbTaVW and HfNbTaTiZr to ultrafast laser radiation is modelled with the hybrid code XTANT-3, combining tight-binding molecular dynamics with the transport Monte Carlo and Boltzmann equation. A two-temperature state with elevated electronic temperature and a cold atomic lattice is studied. The parameters of the electronic system in such a state are evaluated: electronic heat capacity, thermal conductivity, and electron-phonon coupling parameter with the electronic temperatures up to ∼25,000 K. It is also demonstrated that the two refractory alloys do not show signs of nonthermal melting up to the deposited doses of ∼10 eV/atom, making them more radiation resistant than the Cantor alloy or stainless steel. These results suggest that heavy-element high-entropy alloys are more radiation resistant than those containing only lighter elements. Damage in irradiated HfNbTaTiZr starts with the selective diffusion of Ti atoms, forming a transient superionic-like state.

采用混合代码XTANT-3，结合分子动力学、输运蒙特卡罗方程和玻尔兹曼方程，建立了难熔高熵合金MoNbTaVW和HfNbTaTiZr对超快激光辐射的响应模型。研究了电子温度升高和原子晶格冷的双温态。评估了这种状态下电子系统的参数：电子热容，导热系数和电子-声子耦合参数，电子温度高达~ 25,000 K。研究还表明，这两种难熔合金在沉积剂量达到~ 10 eV/原子时不会出现非热熔化的迹象，这使它们比康托合金或不锈钢更耐辐射。这些结果表明，重元素高熵合金比那些只含有较轻元素的合金更耐辐射。辐照后的HfNbTaTiZr损伤始于Ti原子的选择性扩散，形成瞬态超电子态。

引用次数: 0

Optimization of the cross section data for the cyclotron production of 56Co, 57Co, and 58mCo radionuclides 回旋加速器生产56Co、57Co和58mCo放射性核素截面数据的优化

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-02-06 DOI: 10.1016/j.radphyschem.2026.113699

Samar , N. Amjed , A. Naz , A.M. Wajid

An evaluation of production cross sections for the medically and industrially important cobalt radionuclides, namely, ^58mCo, ⁵⁷Co, and ⁵⁶Co, was performed. Experimental data from literature were compiled and critically analyzed in comparison with theoretical results of three nuclear model codes TALYS-1.9, EMPIRE-3.2, and ALICE-IPPE. A theory-aided evaluation methodology was used to generate the recommended Cross sections for each production route and their corresponding impurities. Using these recommended datasets, thick target yields were calculated for all investigated production routes with their impurities. The best production routes were suggested with optimum energy ranges for high-purity production of ^58mCo, ⁵⁷Co, and ⁵⁶Co radionuclides. In particular, the ⁵⁵Mn(α,n)^58mCo (13 → 7 MeV), ⁵⁷Fe(p,n)⁵⁷Co (15 → 6 MeV), and ⁵⁶Fe(p,n)⁵⁶Co (16 → 8 MeV) reactions were found to be the most favorable for reliable cyclotron production.

对医学上和工业上重要的钴放射性核素（即58mCo、57Co和56Co）的生产截面进行了评估。整理文献中的实验数据，并与三个核模型代码TALYS-1.9、EMPIRE-3.2和ALICE-IPPE的理论结果进行了批判性分析。一种理论辅助评价方法被用于生成每条生产路线及其相应杂质的推荐截面。使用这些推荐的数据集，计算了所有研究的含杂质生产路线的粗目标产率。提出了58mCo、57Co和56Co高纯度放射性核素的最佳生产路线和最佳能量范围。其中55Mn(α,n)58mCo（13→7 MeV）、57Fe(p,n)57Co（15→6 MeV）和56Fe(p,n)56Co（16→8 MeV）反应最有利于产生可靠的回旋加速器。

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引用次数: 0

Theoretical and experimental study of L-arginine sulfates l -精氨酸硫酸盐的理论与实验研究

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-02-04 DOI: 10.1016/j.radphyschem.2026.113662

Ruzan Sukiasyan , Mane Sahakyan , Nelli Gharibyan , Armen Ayvazyan , Kyrill Suponitsky , Astghik Danghyan , Armen Atanesyan

In this work, L-arginine sulfates (LAS and LAS∙2H₂O) were studied both experimentally and theoretically. The crystal and molecular structure of LAS and LAS∙2H₂O were determined by single-crystal X-ray diffraction method at 120 K and 295 K. It was shown that the crystals LAS (L-Arg²⁺)∙(SO₄²⁻) and LAS∙2H₂O ((L-Arg²⁺)∙(SO₄²⁻)∙2H₂O) crystallize in the orthorhombic (space group P2₁2₁2) and monoclinic (space group P2₁) systems, respectively. First-principles calculations of dielectric and optical properties, as well as the structural computational optimization procedure, were performed. The UV-Vis transmittance spectrum was recorded, and the second harmonic generation efficiency was investigated. Theoretical results for the optical properties were compared with experimental data․

在这项工作中，l -精氨酸硫酸盐（LAS和LAS∙2H2O）进行了实验和理论研究。采用单晶x射线衍射法测定了LAS和LAS∙2H2O在120 K和295 K下的晶体结构和分子结构。结果表明，晶体LAS (L-Arg2+)∙(SO42−)和LAS∙2H2O ((L-Arg2+)∙(SO42−)∙2H2O分别在正交体系（空间群P21212）和单斜体系（空间群P21）中结晶。进行了介质和光学性质的第一性原理计算，以及结构的计算优化过程。记录了紫外-可见透射光谱，并对二次谐波产生效率进行了研究。光学性质的理论结果与实验数据进行了比较

引用次数: 0

Evaluation of the impact of e-beam and X-ray irradiation conditions on radical generation in PE/EVOH/PE multilayer film 电子束和x射线辐照条件对PE/EVOH/PE多层膜自由基生成影响的评价

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-01-08 DOI: 10.1016/j.radphyschem.2026.113610

Blanche Krieguer , Sylvain R.A. Marque , Samuel Dorey , Fabien Girard , Yelin Ni , Leonard S. Fifield , Nicolas Ludwig , Florent Kuntz , Nathalie Dupuy

Sterilization of biopharmaceutical products has commonly employed gamma radiation from cobalt-60, a radioisotope with associated security and supply chain risks. Increased use of non-radioisotope alternative ionizing energy technologies, such as electron beam (e-beam) and X-rays, is promising but has been hindered by lack of thorough evaluation of the compatibility of these techniques with product materials. This study investigates radical generation in a polyethylene (PE)/ethylene-vinyl alcohol copolymer (EVOH)/PE multilayer film product (Sartorius Flexsafe® with the S80 film) under varying e-beam and X-ray irradiation conditions to address data gaps for these materials and technologies. Utilizing a full factorial design of experiments (DoE), we examined the effects of irradiation technology, dose level, dose rate, processing temperature, and ambient oxygen concentration on radical formation, as quantified by electron spin resonance (ESR). Our results indicate that the type of ionizing technology (e-beam vs. X-ray) does not significantly affect radical concentration generation in the materials. However, higher doses and lower temperatures were found to correlate with increased radical concentrations, while elevated oxygen levels effectively suppressed radicals through a presumed scavenging mechanism. For e-beam processing, a higher dose rate reduced radical accumulation, while the opposite trend was found for X-ray irradiation. Complementary Fourier-transform infrared spectroscopy (FTIR) and principal component analysis (PCA) revealed subtle oxidation differences of PE under specific irradiation conditions.

生物制药产品的灭菌通常采用钴-60的伽马射线，这是一种放射性同位素，具有相关的安全和供应链风险。增加使用非放射性同位素替代电离能源技术，如电子束和x射线，是有希望的，但由于缺乏对这些技术与产品材料的兼容性的全面评价而受到阻碍。本研究研究了在不同的电子束和x射线照射条件下，聚乙烯(PE)/乙烯-乙烯醇共聚物(EVOH)/聚乙烯多层薄膜产品（Sartorius Flexsafe®与S80薄膜）中自由基的产生，以解决这些材料和技术的数据空白。利用全因子实验设计（DoE），研究了辐照技术、剂量水平、剂量率、处理温度和环境氧浓度对自由基形成的影响，并通过电子自旋共振（ESR）进行了量化。我们的研究结果表明，电离技术的类型（电子束与x射线）对材料中自由基浓度的产生没有显著影响。然而，较高的剂量和较低的温度被发现与自由基浓度增加有关，而高氧水平通过一种假定的清除机制有效地抑制了自由基。对于电子束处理，较高的剂量率降低了自由基的积累，而对于x射线照射，则发现相反的趋势。互补傅里叶变换红外光谱（FTIR）和主成分分析（PCA）揭示了PE在特定辐照条件下的细微氧化差异。

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引用次数: 0

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 : 2026-06-01 Epub 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

Enhanced radiation shielding and damage resistance of AA6061 reinforced with TiB2: A Phy-X/PSD and SRIM/TRIM analysis TiB2增强AA6061的辐射屏蔽和抗损伤性能：物理x /PSD和SRIM/TRIM分析

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-02-08 DOI: 10.1016/j.radphyschem.2026.113707

Zübeyde Özkan , Seda Gürgen Avşar , Uğur Gökmen , Sema Bi̇lge Ocak

In this study, the radiation shielding properties of AA6061 and its composite material reinforced with 5% TiB₂ ceramic were investigated using the Phy-X/PSD program for gamma ⁶⁰Co isotope gamma radiation (1173 keV). Key shielding parameters such as the linear attenuation coefficient (LAC), half-value layer (HVL), tenth-value layer (TVL), mean free path (MFP), and effective conductivity (C_eff) were analyzed. The results indicate that the LAC values for AA6061 and AA6061 + 5% TiB₂ were 15.394 cm⁻¹ and 15.874 cm⁻¹, respectively, while the HVL values were determined as 0.045 cm and 0.0436 cm, respectively. The findings suggest that the TiB₂ reinforcement enhances radiation attenuation efficiency. Additionally, SRIM/TRIM simulations were performed to examine the effects of gamma ⁶⁰Co isotope irradiation on these materials at 1173 keV, focusing on mechanisms such as ionization, phonon interactions, and material damage analysis. The total damage values were found to be 16.73 for AA6061 and 16.59 for AA6061 + 5% TiB₂, indicating that the composite structure experiences slightly less damage due to the presence of TiB₂. The combined results from Phy-X/PSD and SRIM/TRIM analyses demonstrate that the addition of 5% TiB₂ enhances the radiation absorption capacity of AA6061, making it a promising candidate for applications requiring improved radiation shielding performance.

本研究利用Phy-X/PSD程序研究了AA6061及其复合材料（5% TiB2陶瓷增强）对γ - 60Co同位素（1173 keV）辐射的屏蔽性能。分析了线性衰减系数（LAC）、半值层（HVL）、十值层（TVL）、平均自由程（MFP）和有效电导率（Ceff）等关键屏蔽参数。结果表明，AA6061和AA6061 + 5% TiB2的LAC值分别为15.394 cm−1和15.874 cm−1，HVL值分别为0.045 cm和0.0436 cm。结果表明，TiB2增强可以提高辐射衰减效率。此外，我们还进行了SRIM/TRIM模拟，以研究伽玛60Co同位素辐照对这些材料在1173 keV下的影响，重点研究电离、声子相互作用和材料损伤分析等机制。结果表明，AA6061 + 5% TiB2的总损伤值为16.73，AA6061 + 5% TiB2的总损伤值为16.59，表明TiB2的存在使复合材料结构受到的损伤略小。Phy-X/PSD和SRIM/TRIM分析的综合结果表明，添加5%的TiB2增强了AA6061的辐射吸收能力，使其成为需要改善辐射屏蔽性能的应用的有希望的候选者。

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引用次数: 0

Data-driven refinement of microscopic γ-ray strength functions for Nd isotopes Nd同位素微观γ射线强度函数的数据驱动改进

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

Radiation Physics and Chemistry

Pub Date : 2026-06-01 Epub Date: 2026-01-16 DOI: 10.1016/j.radphyschem.2026.113641

M. Sepiani , M.N. Nasrabadi

The γ-ray strength function (γSF) is one of the most important components of photonuclear and radiative nuclear reaction mechanisms, describing the probability of the gamma-ray emission or absorption. Microscopic models of γSF offer a more fundamental description compared to phenomenological approaches, they cannot be flexibly adjusted to experimental data. To address this problem, a correction method for microscopic γSFs using some adjustable parameters has been implemented in the nuclear reaction codes. This work determines the optimal values of these parameters for microscopic Gogny HFB + QRPA γSF model for neodymium (Nd) isotopes by analyzing existing experimental γSF data for investigating the photonuclear reactions. The results demonstrate that by applying these adjustable parameters, the predictive accuracy of microscopic model for these reactions can be significantly improved. This improvement has important implications for various fields in nuclear physics and technology.

γ射线强度函数（γSF）是光核和辐射核反应机制中最重要的组成部分之一，描述了射线发射或吸收的概率。与现象学方法相比，γ - sf的微观模型提供了更基本的描述，它们不能灵活地调整到实验数据。为了解决这一问题，在核反应代码中实现了一种利用一些可调参数对微观γ - sfs进行校正的方法。本工作通过分析现有的用于研究光核反应的γSF实验数据，确定了这些参数的最优值用于钕同位素的微观Gogny HFB + QRPA γSF模型。结果表明，应用这些可调参数，可以显著提高微观模型对这些反应的预测精度。这一改进对核物理和技术的各个领域具有重要意义。

引用次数: 0