Radiation Measurements最新文献

First LM-OSL analysis of natural alexandrite 首次对天然亚历山大变石进行LM-OSL分析

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-22 DOI: 10.1016/j.radmeas.2025.107441

Yasmim F. Amorim , Matheus C.S. Nunes , Alicja Chruścińska , Krzysztof Wiśniewski , Neilo M. Trindade

引用次数: 0

A simulation pipeline for fast neutron imaging and spectroscopy using quantified detector attributes 基于量子化探测器属性的快中子成像与光谱模拟管道

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-15 DOI: 10.1016/j.radmeas.2025.107440

Ricardo Lopez, Oskari Pakari, Catherine Ballard, Shaun Clarke, Sara Pozzi

{"title":"A simulation pipeline for fast neutron imaging and spectroscopy using quantified detector attributes","authors":"Ricardo Lopez, Oskari Pakari, Catherine Ballard, Shaun Clarke, Sara Pozzi","doi":"10.1016/j.radmeas.2025.107440","DOIUrl":"10.1016/j.radmeas.2025.107440","url":null,"abstract":"<div><div>Radiation imaging capabilities, essential in the nuclear nonproliferation regime, facilitate source localization and, in certain cases, spectroscopy. Scatter-based neutron cameras, which can measure the neutron signatures from special nuclear material, hold particular interest. Systems incorporating organic scintillators can extract neutron energy spectra, potentially distinguishing fission neutron sources from others, such as alpha-neutron sources. The development and testing of a scatter-based neutron imager, however, can be challenging without having an accurate simulation model or first constructing a prototype. This work describes a simulation pipeline that takes output from MCNPX-PoliMi simulations and creates the expected back-projection neutron images and neutron energy spectra. This pipeline was developed to improve the modeling of fast neutron imagers and bridge the current gap in literature, which predominantly focuses on gamma-ray Compton imager models. This work also reports on the significance of various real-world system considerations and their effects on the simulated detector responses. The pipeline was verified and validated with experimental data collected using a <sup>252</sup>Cf spontaneous fission source using a fast neutron scattering imager developed at the University of Michigan.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107440"},"PeriodicalIF":1.6,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865208","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}

引用次数: 0

Effects of alkali earth metal doping on the luminescence and scintillation properties of Cs2HfCl6 single crystals 碱土金属掺杂对Cs2HfCl6单晶发光和闪烁性能的影响

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-15 DOI: 10.1016/j.radmeas.2025.107438

Shuangliang Cheng , Alena Beitlerova , Romana Kucerkova , Martin Nikl , Shunsuke Kurosawa , Guohao Ren , Yuntao Wu

{"title":"Effects of alkali earth metal doping on the luminescence and scintillation properties of Cs2HfCl6 single crystals","authors":"Shuangliang Cheng , Alena Beitlerova , Romana Kucerkova , Martin Nikl , Shunsuke Kurosawa , Guohao Ren , Yuntao Wu","doi":"10.1016/j.radmeas.2025.107438","DOIUrl":"10.1016/j.radmeas.2025.107438","url":null,"abstract":"<div><div>In recent years, intrinsic self-trapped exciton (STE) emission materials have been developed as promising scintillators due to their bright and self-absorption free luminescence. Among these materials, cesium hafnium chloride (Cs<sub>2</sub>HfCl<sub>6</sub>, CHC) has received attention for its high light yield, remarkable energy resolution, high radiation-stopping capability, absence of radioactive background, and low non-proportionality. This study investigated the luminescence and scintillation properties of both the undoped and alkali earth metals (AE)-doped CHC. The findings revealed that undoped and AE-doped CHC exhibited four emission peaks at 368, 383, 435, and 465 nm, corresponding to intrinsic STE emission, defect-related emission, Zr-related emission, and I-related emission, respectively. The corresponding decay time were about 1.5, 5.5, 11, and 2.3 μs. Notably, AE doping did not introduce any new emission centers, as confirmed by photoluminescence and radioluminescence spectra. The light yield and energy resolution for undoped CHC and CHC:AE were measured to be 34,000–37,000 ph/MeV and 3.5–4.1 % at 662 keV, respectively. Although AE doping did not enhance scintillation properties of CHC, this study elucidated several sources of luminescence centers in CHC, providing valuable insights for future optimization of its scintillation properties.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107438"},"PeriodicalIF":1.6,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842898","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}

引用次数: 0

Evaluating the effects of increased stimulation power on a beryllium oxide real-time optically stimulated luminescence fibre-coupled dosimeter 评价提高激发功率对氧化铍实时光激发发光光纤耦合剂量计的影响

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-15 DOI: 10.1016/j.radmeas.2025.107439

Erin Lukas , Alexandre M.C. Santos , Miftar Ganija , Peter Veitch

引用次数: 0

Research on a radioactive source localization algorithm based on UAV aerial survey data 基于无人机航测数据的放射源定位算法研究

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-14 DOI: 10.1016/j.radmeas.2025.107437

Jialong Chen , Ai Chen , Jiayue Wang , Yang Liu

引用次数: 0

Measurement of angular correlations in low-energy internally-created e−e+ pairs using Timepix3 pixel detectors 使用Timepix3像素探测器测量低能内部产生的e -e +对的角相关性

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-11 DOI: 10.1016/j.radmeas.2025.107424

Babar Ali , Zdeněk Kohout , Hugo Natal da Luz , Olivier Rousselle , Rudolf Sýkora , Tomáš Sýkora

{"title":"Measurement of angular correlations in low-energy internally-created e−e+ pairs using Timepix3 pixel detectors","authors":"Babar Ali , Zdeněk Kohout , Hugo Natal da Luz , Olivier Rousselle , Rudolf Sýkora , Tomáš Sýkora","doi":"10.1016/j.radmeas.2025.107424","DOIUrl":"10.1016/j.radmeas.2025.107424","url":null,"abstract":"<div><div>We report on measurements of electron–positron pairs internally created in excited <span><math><mrow><msup><mrow></mrow><mrow><mn>16</mn></mrow></msup><msup><mrow><mi>O</mi></mrow><mrow><mo>∗</mo></mrow></msup></mrow></math></span> nuclei, as detected using Timepix3 pixel detectors. Such experiments, complemented with simulation efforts, form a basis for our long-term programme to remeasure the so-called ATOMKI anomaly, i.e., the discrepancy in the pair-opening-angle distribution between theoretical expectation and experimental findings for <span><math><msup><mrow></mrow><mrow><mn>8</mn></mrow></msup></math></span>Be and <span><math><msup><mrow></mrow><mrow><mn>4</mn></mrow></msup></math></span>He nuclei. Emphasis is placed on studying the ability of the setup, comprising of three Timepix3 detectors surrounding the target, to reconstruct the vertices of e<span><math><msup><mrow></mrow><mrow><mo>−</mo></mrow></msup></math></span>e<span><math><msup><mrow></mrow><mrow><mo>+</mo></mrow></msup></math></span> pairs and the angle between each-pair members. The <span><math><mrow><msup><mrow></mrow><mrow><mn>16</mn></mrow></msup><msup><mrow><mi>O</mi></mrow><mrow><mo>∗</mo></mrow></msup></mrow></math></span> nucleus, created by transmutation of fluorine upon bombardment with protons tuned to populate the 6.05-MeV (first excited) oxygen state, is a convenient means of producing copious amounts of pairs via the E0 deexcitation. The high yield suits the testing purposes and compensates the disadvantage that thus-created particles are of significantly lower energies than in reactions supposedly displaying the anomaly, to be eventually studied. Items such as multiple scattering in the detector material, gamma-background suppression and geometric limitations are discussed.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107424"},"PeriodicalIF":1.6,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143834586","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}

引用次数: 0

Stability of PRESAGE® dosimeter for end-to-end radiotherapy dosimetry audit and dose delivery 用于端到端放射剂量学审核和剂量传递的preage剂量计的稳定性

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-11 DOI: 10.1016/j.radmeas.2025.107434

Muhammad Zamir Mohyedin , Hafiz Mohd Zin , Ngie Min Ung , David A. Bradley , Ahmad Taufek Abdul Rahman

{"title":"Stability of PRESAGE® dosimeter for end-to-end radiotherapy dosimetry audit and dose delivery","authors":"Muhammad Zamir Mohyedin , Hafiz Mohd Zin , Ngie Min Ung , David A. Bradley , Ahmad Taufek Abdul Rahman","doi":"10.1016/j.radmeas.2025.107434","DOIUrl":"10.1016/j.radmeas.2025.107434","url":null,"abstract":"<div><div>The stability of commercially available PRESAGE® was evaluated for use in complex radiotherapy dose delivery and audit. The dose-response of PRESAGE® under room temperature, low temperature and exposure to visible light was investigated. The photon energy and dose rate dependence of the PRESAGE® were also investigated. It shows a different response under different temperatures. It was demonstrated that this batch of PRESAGE® shows decreased optical density (OD) over time instead of increased OD like a common PRESAGE®. Additionally, the OD of PRESAGE® decreases more slowly which is 0.1 % each hour under low temperature. PRESAGE® also quickly returned to its original state within 48 h post-irradiation under room temperature which the OD decreased by 2.06 % each hour. Upon its return to its original state, the PRESAGE® was able to be reused again with the dose-response reproducibility of more than 99 %. This study also shows that the PRESAGE® is highly sensitive to the visible light radiated by the common fluorescent lamp. The longer the exposure, the higher the optical density within the PRESAGE® which on average, the OD increased by 21.13 % each hour of exposure. The PRESAGE® shows a small dependence of energy with the linearity difference of 5.22 % and shows the independence of dose rate with a variation of less than 5 %.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107434"},"PeriodicalIF":1.6,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843395","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}

引用次数: 0

Computational neutron personal dosimetry at the Budapest Research Reactor 布达佩斯研究堆计算中子个人剂量测定

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-11 DOI: 10.1016/j.radmeas.2025.107420

Sita Gandes Pinasti , Olivier Van Hoey , Liviu-Cristian Mihailescu , Mahmoud Abdelrahman , Dorottya Jakab , Anna Pantya , Tamás Pázmándi , Csilla Rudas , Márton Zagyvai , Filip Vanhavere , Nicolas Pauly

{"title":"Computational neutron personal dosimetry at the Budapest Research Reactor","authors":"Sita Gandes Pinasti , Olivier Van Hoey , Liviu-Cristian Mihailescu , Mahmoud Abdelrahman , Dorottya Jakab , Anna Pantya , Tamás Pázmándi , Csilla Rudas , Márton Zagyvai , Filip Vanhavere , Nicolas Pauly","doi":"10.1016/j.radmeas.2025.107420","DOIUrl":"10.1016/j.radmeas.2025.107420","url":null,"abstract":"<div><div>Radiation worker dose assessment by personal dosemeters is limited by the fact that the single-point measurements may not be representative for the whole body and by practical challenges, such as workers wearing incorrectly the dosemeters or occasionally even forgetting them. Furthermore, in neutron workplaces dosemeters can significantly over- or underestimate the dose. Computational neutron dosimetry presents an alternative monitoring method. This study aims to investigate the feasibility of using computational neutron dosimetry in a real neutron workplace, namely at the Budapest Research Reactor. The Raylab DIAMON neutron spectrometer and the Berthold LB6411 ambient neutron monitor were used for rapid neutron field characterisation. By combining the measured dose rate map with a camera-based motion tracking system, it was possible to calculate the neutron dose accumulated by a worker. This study demonstrated that worker movement can be accurately tracked, provided there are no obstacles between the camera and the worker. Additionally, the dose rate mapping can be easily done and the computational neutron dosimetry can effectively estimate worker dose in real neutron workplace fields, as long the radiation field remains stable or its intensity can be scaled using the reactor power or a reference ambient dosemeter as reference. This approach has the potential to complement or even to replace the physical dosemeters, providing improved accuracy in complex neutron fields. Combining directional and spectral data from the DIAMON could also enable calculations in terms of <span><math><mi>H</mi></math></span> <sub>p</sub> <span><math><mrow><mo>(</mo><mn>10</mn><mo>)</mo></mrow></math></span> or effective dose.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107420"},"PeriodicalIF":1.6,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143828705","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}

引用次数: 0

Development and radiation test of a secondary emission ionization calorimetry module 二次发射电离量热模块的研制与辐射测试

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-02 DOI: 10.1016/j.radmeas.2025.107426

Nejdet Paran , Emrah Tiras , Burak Tekgun , Saleh Abubakar

{"title":"Development and radiation test of a secondary emission ionization calorimetry module","authors":"Nejdet Paran , Emrah Tiras , Burak Tekgun , Saleh Abubakar","doi":"10.1016/j.radmeas.2025.107426","DOIUrl":"10.1016/j.radmeas.2025.107426","url":null,"abstract":"<div><div>The demand for precise, robust, and reliable radiation-resistant particle detectors and ionization calorimeters intensifies due to the escalating luminosity and unprecedented radiation conditions at particle colliders and accelerators. Secondary Emission (SE) Ionization Calorimetry is a novel technology designed to measure the energy of electromagnetic and hadronic particles, particularly in extreme radiation conditions. In this study, we have tested and investigated the development and radiation tests of the novel SE modules. The modules were developed by modifying the conventional Hamamatsu single-anode R7761 Photomultiplier Tubes (PMTs). Three different voltage conditions for the same module were created and the new modules were tested using cosmic and gamma radiation sources, Co-60. The results show that all three modes have good sensitivity to electromagnetic showers, and they are suitable for harsh radiation environments. This study also indicates that the SE module is a promising technology shedding light on future radiation-resistant nuclear and high-energy detectors. Here, we discuss the technical design, test characteristics, and cosmic and particle interaction results of the newly developed SE modules.</div></div>","PeriodicalId":21055,"journal":{"name":"Radiation Measurements","volume":"184 ","pages":"Article 107426"},"PeriodicalIF":1.6,"publicationDate":"2025-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143823742","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}

引用次数: 0

Editorial: The 20th international conference on solid state dosimetry (SSD20) 第20届固体剂量学国际会议（SSD20）

IF 1.6 3区物理与天体物理

Radiation Measurements Pub Date : 2025-04-01 DOI: 10.1016/j.radmeas.2025.107404

引用次数: 0