Radiation Physics and Chemistry最新文献

{"title":"TeO2: As a key component in improving radiation shielding of B2O3-based glass systems","authors":"M.I. Sayyed, Sabina Yasmin, M.R.I. Faruque, S. Abdullah, K.A. Mahmoud, M.U. Khandaker","doi":"10.1016/j.radphyschem.2025.112782","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.112782","url":null,"abstract":"New glasses with enhanced radiation shielding characteristics have potential applications in different fields requiring radiation protection. In the context of radiation shielding applications, this work aims to develop new lead-free B<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–TeO<ce:inf loc=\"post\">2</ce:inf>–Bi<ce:inf loc=\"post\">2</ce:inf>O<ce:inf loc=\"post\">3</ce:inf>–ZnO–CaO glass systems. A 15–30 mol% increase in TeO<ce:inf loc=\"post\">2</ce:inf> concentration results in a 4.070–4.498 g/cm<ce:sup loc=\"post\">3</ce:sup> density increase. The influence of increasing the TeO<ce:inf loc=\"post\">2</ce:inf> doping concentration on the mechanical properties of the prepared boro-tellurite glass was utilized using the Makishima-Makinze theory. Additionally, the influence of raising the TeO<ce:inf loc=\"post\">2</ce:inf> concentration on the radiation shielding properties of the prepared boro-tellurite glass was studied using the Monte Carlo simulation. The Monte Carlo simulation confirms that a 15–30 mol% TeO<ce:inf loc=\"post\">2</ce:inf> increase enhances LAC values, reducing half-value layer thickness (HVL), and improving radiation shielding. However, mechanical properties such as hardness and Young's modulus slightly decrease due to TeO<ce:inf loc=\"post\">2</ce:inf> substitution.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"5 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143849520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring software tools for comparative evaluation of radiation attenuation parameters in various drugs across gamma, electron, neutron, and ion radiations","authors":"N.A. Kotb ,&nbsp;O.A. El-Kawy ,&nbsp;A.M. Abdelmonem","doi":"10.1016/j.radphyschem.2025.112794","DOIUrl":"10.1016/j.radphyschem.2025.112794","url":null,"abstract":"<div><div>This study investigates the radiation attenuation parameters for some commonly used pharmaceutical drugs like diazepam, ibutilide, levofloxacin, ibuprofen, ranitidine, and celecoxib, which are crucial for medical applications. Through computational analyses employing advanced software tools such as Phy-X/PSD, Py-MLBUF, GRASP, SRIM Monte Carlo, and ESTAR NIST, the mass attenuation coefficient, linear attenuation coefficient, half-value layer, mean free path, effective atomic number, and effective electron density were determined across a broad energy spectrum. Additionally, ionizing radiation interactions with gamma rays, ion particles (H⁺, He²⁺, Bi³⁺, Ti⁴⁺, Gd³⁺, and In³⁺), and electrons were examined, along with fast neutron removal cross-section (FNRCS) and macroscopic effective removal cross-section (MRCS). The results offer valuable insights applicable to radiation physics, pharmacology, and medical physics, enhancing understanding of radiation-drug interactions essential for medical diagnostics and therapies.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112794"},"PeriodicalIF":2.8,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143799996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monte Carlo modelling of a new sample-holder design for UV–Vis spectroscopy","authors":"R. Persiani ,&nbsp;A. Agugliaro ,&nbsp;S. Albergo ,&nbsp;R. De Angelis ,&nbsp;I. Di Bari ,&nbsp;S. Millesoli ,&nbsp;G. Saccà ,&nbsp;A. Sciuto ,&nbsp;A. Tricomi","doi":"10.1016/j.radphyschem.2025.112747","DOIUrl":"10.1016/j.radphyschem.2025.112747","url":null,"abstract":"<div><h3>Introduction:</h3><div>Spectrophotometry is a well-established technique widely employed in chemistry, biology, medicine research, and industrial applications. It plays a crucial role in environmental testing, detecting pollutants in water and air. Many spectrometer models adopt a quartz cuvette. We investigated the replacement of the cuvette with a new sample holder coupled with SiliconPhotoMultiplier.</div></div><div><h3>Methods:</h3><div>This new holder, with the shape of an integrating sphere, offers several advantages since it is much less affected by sample stratification and turbidity. Furthermore, the high reflectivity of the cavity walls lets the light cross the sample many times, enhancing the sensitivity. We implemented a detailed Geant4 simulation to optimize this new sample holder and to provide its first characterization. A double-line spectrophotometer was assembled with two newly designed holders. The system foresees a pulsed light source. If the source emits a continuum spectrum, as in the case of pulsed Xenon lamps, a monochromator is mandatory for wavelength selection. The light is transmitted using solarized optical fibres and is split in half to feed the two identical sample holders. The emerging light is conveyed to the Silicon Photomultipliers. One holder is filled with ultrapure water, as a reference, while the other contains a solution of ultrapure water and a contaminant.</div></div><div><h3>Results:</h3><div>We inferred the inner walls’ reflectivity by measuring the stretching of a narrow light pulse. A preliminary measurement with an aqueous solution of NaNO<span><math><msub><mrow></mrow><mrow><mn>3</mn></mrow></msub></math></span> provides a detection limit of 40 mg/L.</div></div><div><h3>Conclusions:</h3><div>We propose a new sample-holder design to improve the sensitivity of spectroscopy.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112747"},"PeriodicalIF":2.8,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Validation of ISO 4037 x-ray reference field following ICRU-95 operational quantities","authors":"Duc-Ky Bui,&nbsp;Ngoc-Quynh Nguyen,&nbsp;Ngoc-Thiem Le","doi":"10.1016/j.radphyschem.2025.112771","DOIUrl":"10.1016/j.radphyschem.2025.112771","url":null,"abstract":"<div><div>For ISO 4037 x-ray matched reference fields, the radiometric quantities of the x-ray fields must be verified to apply the recommended conversion coefficients stated in ISO 4037-3. To ensure the proper applications, ISO 4037 x-ray reference fields must be validated following new operational quantities defined in the ICRU 95 report. For these reasons, in this work, the first and second half-value layers (<span><math><mrow><mi>H</mi><mi>V</mi><mi>L</mi></mrow></math></span>) of ISO 4037 x-ray fields were calculated. Moreover, the conversion coefficients to convert air kerma to the new operational quantities were investigated for ISO 4037 x-ray reference fields with various beam qualities. The maximum deviations from the reference <span><math><mrow><mi>H</mi><mi>V</mi><mi>L</mi></mrow></math></span> values were also deduced, corresponding to 2 % changes in the conversion coefficients. The selection of <span><math><mrow><mi>H</mi><mi>V</mi><msub><mrow><mi>L</mi></mrow><mrow><mn>1</mn></mrow></msub></mrow></math></span> or <span><math><mrow><mi>H</mi><mi>V</mi><msub><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span> in practical measurements was also discussed.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112771"},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824376","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of non-coplanar dose reconstruction for evaluating pre-treatment quality assurance in stereotactic treatments","authors":"Sumanta Manna ,&nbsp;Sanjib Gayen ,&nbsp;Sonal Varshney","doi":"10.1016/j.radphyschem.2025.112790","DOIUrl":"10.1016/j.radphyschem.2025.112790","url":null,"abstract":"<div><h3>Purpose</h3><div>Modern stereotactic radiosurgery (SRS) or stereotactic radiotherapy (SRT) treatments often combine coplanar and non-coplanar beams to enhance dose conformity. However, patient-specific quality assurance (PSQA) for non-coplanar setups remains challenging. During data acquisition in the phantom, couch angles associated with non-coplanar beams frequently collapse to 0°, irrespective of their intended spatial configuration. This simplification prevents deflection of the phantom but does not accurately replicate the actual non-coplanar geometry used in treatment. This study aims to evaluate the impact of incorporating non-coplanar geometry in dose reconstruction compared to reconstructions assuming coplanar geometry and to quantify the differences observed in PSQA outcomes.</div></div><div><h3>Material and methods</h3><div>The Octavius 4D system, integrated with a 1000 SRS detector array, acquired pre-treatment measurement data for ten SRS/SRT treatment verification plans under planar and non-coplanar beam configurations. Measurement data were analyzed using the Octavius system in conjunction with Verisoft software and compared against treatment planning system-generated verification plans. Dose comparison and validation were conducted using gamma evaluation with criteria of 1 mm/2 %, 2 mm/2 %, and 3 mm/3 % applied across axial, coronal, and sagittal planes in two-dimensional (2D) and three-dimensional (3D) volumetric assessments.</div></div><div><h3>Results</h3><div>Non-coplanar reconstructions showed significantly higher gamma passing rates in coronal and sagittal planes under stringent criteria, with no significant differences in the transverse plane. Global gamma ratios revealed greater variability in the coronal plane, with 3D analyses less consistent than 2D. Correlations between 2D and 3D evaluations weakened as gamma criteria relaxed.</div></div><div><h3>Conclusions</h3><div>Non-coplanar dose reconstruction demonstrated superior accuracy in 3D verification by preserving the integrity of couch angles, eliminating the need for their collapse during analysis. The findings recommend adopting a 2 %/2 mm gamma evaluation criterion for both planar and non-coplanar measurements, while a more stringent 1 mm/2 % criterion is suggested for pre-treatment verification of non-coplanar setups to ensure higher precision.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112790"},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prompt gamma neutron activation analysis: A review of applications, design, analytics, challenges, and prospects","authors":"Marina R. Abdelnour ,&nbsp;Juntao Liu ,&nbsp;K. Hossny ,&nbsp;A.M. Wajid ,&nbsp;Wenxin Li ,&nbsp;Zhiyi Liu","doi":"10.1016/j.radphyschem.2025.112693","DOIUrl":"10.1016/j.radphyschem.2025.112693","url":null,"abstract":"<div><div>Prompt gamma-ray neutron activation analysis (PGNAA) is a powerful, non-destructive technique widely used for multi-elemental analysis, valued for its rapid, on-site measurement capability and high sensitivity across diverse elements. Based on neutron capture reactions, PGNAA enables precise identification and quantification of elements by detecting characteristic prompt gamma emissions from neutron-captured nuclei. Recent advances in computational modeling, including Monte Carlo simulations, have revolutionized PGNAA setup design, allowing optimized configurations that enhance measurement accuracy and significantly reduce background noise. PGNAA’s versatility has led to its adoption in critical applications, including food and agriculture, environmental monitoring, industrial process control, and security screening. This review covers PGNAA’s setup, covering essential components such as neutron sources, moderators, collimators, and gamma detection, and highlights modern optimization techniques like machine learning and genetic algorithms. These transformative methods have boosted PGNAA’s signal-to-noise ratio and enabled precise, efficient system designs. Additionally, parametric and sensitivity analyses, including the Morris method, are critical in refining system robustness under diverse operational conditions. Advanced data processing approaches, such as noise-mitigation preprocessing and post-processing, further improve the reliability of the information extracted. Despite its many strengths, PGNAA faces challenges, such as reducing background noise interference preserving high sensitivity and specificity, ensuring compact and deployable system designs, and meeting safety and regulatory standards are all crucial to the success of PGNAA detection systems. This review provides a comprehensive overview of PGNAA, addressing these practical criteria and identifying future directions to broaden its application potential in advanced analytical fields.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112693"},"PeriodicalIF":2.8,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820256","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic evaluation of nanoparticle dose enhancement by inverse Compton scattering source using Monte Carlo simulation","authors":"Zhan Shen, Hao Ding, Zhijun Chi, Qiao Li, Yingchao Du, Xiaoping Ouyang, Chuanxiang Tang","doi":"10.1016/j.radphyschem.2025.112781","DOIUrl":"https://doi.org/10.1016/j.radphyschem.2025.112781","url":null,"abstract":"Radiotherapy with nanoparticles has been widely investigated, showing an energy dependence performance. A Compact radiotherapy facility providing energy-tuneable X-rays is highly demanded. Inverse Compton Scattering (ICS) sources can offer quasi-monochromatic and continuous energy-tuneable X-rays, enabling optimization of radiation enhancement effect for various nanomaterials. This study simulated enhanced radiotherapy with an ICS source using the Geant4 at microscale. The radiation enhancement effect of a typical nanomaterial, i.e., gold nanoparticles (GNPs), was evaluated and compared with the conventional X-ray tube. An improved model of tumors was built to evaluate the microscopic dose enhancement factor (DEF) of different nanoparticles, including GNPs and hafnium oxide nanoparticles. DEF of nanoparticles showed an energy dependence and the largest DEF of GNPs was 17.89 at 36 keV with monochromatic beams. The ICS source displayed a similar performance in terms of DEF (17.77 at 38 keV), which was higher than the 80 kV X-ray tube (12.80), due to the narrow bandwidth. The improved simulation method showed that the DEF was 22.8 for GNPs at 30 keV and 9.5 for hafnium oxide nanoparticles at 25 keV. The implementation of the ICS source, with a higher DEF at optimal energy, is feasible for enhanced radiotherapy. The continuous energy-tuneable property makes it a promising equipment for the application of enhanced radiotherapy with different nanomaterials.","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"139 1","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820244","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, structural, and optical properties of lead-free Tm3+ ions doped zinc tellurite glass and Ho3+ ions doped zinc borophosphate glass for radiation shielding application","authors":"P. Vinothkumar ,&nbsp;B. Yamini ,&nbsp;S. Praveenkumar ,&nbsp;A. Vincelet Jobikha","doi":"10.1016/j.radphyschem.2025.112795","DOIUrl":"10.1016/j.radphyschem.2025.112795","url":null,"abstract":"<div><div>Tm³⁺-doped zinc tellurite (TeBSrZnNaMg: Tm) and Ho³⁺-doped borophosphate (BPAgMgLiZn: Ho) glasses were synthesized via the melt-quenching technique. X-ray diffraction confirmed their amorphous nature. FTIR analysis identified characteristic functional groups. Optical absorption spectra revealed the ³H₆ → ³H₅ transition of Tm³⁺ at 1100–1250 nm, which is significant for infrared applications, while the ³H₆ → ³H₄ transition appeared at ∼800 nm. For Ho³⁺ ions, the 5I₈ → 5F₅ transition at 640 nm and 5I₈ → 5I₆ at 1150 nm were observed. The photoluminescence analysis showed emission peaks at 545 nm, 650 nm, and 750 nm for Ho³⁺, with CIE coordinates (x = 0.3215, y = 0.3246) and a CCT of 6057 K. TeBSrZnNaMg: Tm glass exhibited coordinates (x = 0.1684, y = 0.0075) and a CCT of 1916 K. The radiation shielding analysis showed that at 0.015 MeV, the linear attenuation coefficients were 155 cm⁻¹ (TeBSrZnNaMg: Tm) and 50 cm⁻¹ (BPAgMgLiZn: Ho), with MAC values of 38 and 13 cm²/g, respectively. The HVL was 4.77 cm and 8.173 cm, while TVL was 15 cm and 27.14 cm. FNRCS values were 0.082 cm⁻¹ and 0.138 cm⁻¹. The gamma-ray parameters such as Z_eff and mass attenuation coefficients of the fabricated glasses were studied with various energy ranges.</div><div>A high-purity germanium detector (ORTEC GEM 60P) with an energy resolution of 1.69 keV was used for gamma-ray measurements. JO parameters of both prepared glasses were studied. The results revealed that TeBSrZnNaMg: Tm and BPAgMgLiZn: Ho glasses are appropriate for blocking radiation.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112795"},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143792084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mapping the airborne distribution of caesium-137 in the Asia-Pacific region using data from the Comprehensive Nuclear Test-Ban Treaty","authors":"Azni Abdul Aziz ,&nbsp;Ahmad Ibraheem Abu Bakar ,&nbsp;Bashillah Baharuddin ,&nbsp;Mohamad Syahiran Mustaffa","doi":"10.1016/j.radphyschem.2025.112768","DOIUrl":"10.1016/j.radphyschem.2025.112768","url":null,"abstract":"<div><div>Recent global events, such as North Korea's nuclear tests and the Fukushima nuclear accident, have heightened concerns about the dispersion of radioactive materials into the atmosphere. This study maps the dispersion of airborne Cs-137 in the Asia-Pacific region, with a focus on its impact on the Malaysian environment. Cs-137 concentration data were collected from the Comprehensive Nuclear-Test-Ban Treaty Organization radionuclide online database, covering the Northeast and Southwest Monsoon seasons from 2009 to 2023. The data, sourced from 12 International Monitoring System stations across the Asia-Pacific, Central Asia (China), and Australia, were analyzed using ArcGIS Pro software to create maps illustrating the spread of Cs-137 for each season of the selected years. The maps reveal the atmospheric distribution of Cs-137 over time, with the highest concentration recorded at 2985 μBq/m³ at Japan's JPP38 station in March 2011, following the Fukushima nuclear disaster. Generally, the dispersion shows an outward pattern within the region, but it gradually diminishes, returning to a very low concentration of less than 500 μBq/m³ as the years approach 2023.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112768"},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143820257","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Structural, optical and hydrophobic properties of single-crystal muscovite mica implanted with 500 keV Au+1 ions","authors":"Muhammad Sabbtain Abbas ,&nbsp;Abid Mahmood ,&nbsp;Naeema Naeem ,&nbsp;Turab Ali Abbas","doi":"10.1016/j.radphyschem.2025.112801","DOIUrl":"10.1016/j.radphyschem.2025.112801","url":null,"abstract":"<div><div>This study investigates the impact of 500 keV singly charged gold ion (Au⁺¹) implantation in single-crystal muscovite mica, a material widely recognized for its diverse technological applications, particularly in radiation physics. By maintaining a constant incident ion energy of 500 keV, the study examines the effects of ion dose (ranging from 10¹² to 10¹⁵ ions/cm²) on the structural, optical, and hydrophobic properties of mica. The projected range of Au⁺¹ ions, reaching a depth of 120 nm, induces various defects, including displacement damage, vacancies, and dislocations. XRD analysis reveals a decrease in peak intensity, an increase in FWHM, increase in microstrain and a reduction in average crystallite size with increasing ion dose, indicating a progressive loss of crystallinity. Additionally, a symmetric lattice plane shift toward lower angles is observed in all lattice planes, signifying the presence of tensile stresses. This shift results in the expansion of the unit cell and an increase in d-spacing due to ion-induced defects. The expansion of the unit cell volume exhibits a linear increase up to an ion dose of 10¹³ ions/cm², after which it saturates. This trend is determined by estimating lattice parameters from the Rietveld-refined XRD patterns of samples implanted with varying ion doses. Williamson-Hall analysis further reveals a correlation between crystallite size and strain, showing a significant reduction in crystallite size accompanied by an increase in microstrain as the ion dose increases. UV–visible spectrophotometry measurements indicate a decrease in the optical band gap and an increase in Urbach energy with increasing ion dose, attributed to ion-implantation-induced structural transformations. Additionally, an increase in the surface contact angle is observed, suggesting changes in the physicochemical properties of mica and a notable shift toward a more hydrophobic surface. These findings provide valuable insights into the interaction between gold ion beams and mica surfaces, reinforcing its potential use as a radiation-facing material.</div></div>","PeriodicalId":20861,"journal":{"name":"Radiation Physics and Chemistry","volume":"234 ","pages":"Article 112801"},"PeriodicalIF":2.8,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143791979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}