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EFFECT OF INTENSE MAGNETIC FIELDS ON THE TRAJECTORY OF ELECTRONSPROPAGATING IN LOW DENSITY MEDIA OF INTEREST FOR MRI-LINAC RADIOTHERAPY 强磁场对磁共振直线放射治疗相关低密度介质中电子传播轨迹的影响
Anales AFA Pub Date : 2023-09-28 DOI: 10.31527/analesafa.2023.34.3.65
A. Gayol, M. Valente
{"title":"EFFECT OF INTENSE MAGNETIC FIELDS ON THE TRAJECTORY OF ELECTRONSPROPAGATING IN LOW DENSITY MEDIA OF INTEREST FOR MRI-LINAC RADIOTHERAPY","authors":"A. Gayol, M. Valente","doi":"10.31527/analesafa.2023.34.3.65","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.3.65","url":null,"abstract":"Ionizing radiation transport mechanisms in presence of magnetic fields can be described in terms of formalisms based on the Boltzmann radiation transport equation. However, when the transport occurs not in vacuum but in scattering media the difficulty of its analytical calculation considerably increases because of the random character of the radiation interaction processes with the scattering medium. In this context, the present work proposes and describe a methodology to characterize effects due to strong magnetic fields on electron trajectories by means of numerical techniques, such as Monte Carlo simulation, to be applied to scattering media, typically present in MRI-LINAC devices in radiotherapy situations. The obtained results for air as the scattering material show that variations of the electrons’ trajectories depend jointly on the magnetic field and the interactions with the scattering medium. Increasing the magnetic field intensity enhances the curvature of the trajectories while decreasing the displacement in the radial direction.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427401","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
COPPER NANOPARTICLES FOR IONIZING RADIATION DOSIMETRY FOR THERANOSTICS 治疗学电离辐射剂量测定用铜纳米粒子
Anales AFA Pub Date : 2023-09-28 DOI: 10.31527/analesafa.2023.34.3.55
S. Lechón Páez, G. Tubon Usca
{"title":"COPPER NANOPARTICLES FOR IONIZING RADIATION DOSIMETRY FOR THERANOSTICS","authors":"S. Lechón Páez, G. Tubon Usca","doi":"10.31527/analesafa.2023.34.3.55","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.3.55","url":null,"abstract":"The present investigation is focused on the effect of copper nanoparticles infused in a PAGAT dosimetry system. Monte Carlo simulations using the PENELOPE code were employed to analyze a system composed of stabilized copper nanoparticles coated with ascorbic acid. The system was subjected to irradiation with a 150 keV monoenergetic photon beam, representative of orthovoltage applications. The study evaluated the influence of three key factors: the size of the copper nanoparticle (ranging from 10 to 300 nm), the coating thickness (ranging from 25 to 400 nm), and the coating density (ranging from 1.162 to 1.650 g/mL). The findings indicate a slight increase in dose enhancement with increasing nanoparticle size. Conversely, an increase in stabilizer thickness leads to a decrease in dose enhancement in the PAGAT system. The effect of changes in stabilizer density on dose enhancement is found to be less significant. Additionally, the photon fluence spectrum was analyzed for the three studied cases to identify and evaluate the characteristic fluorescence lines of copper. This analysis confirms the presence of characteristic X-rays derived from the presence of copper. nanoparticles, which could potentially serve as a foundation for specific imaging techniques","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
THE INERTIA OF LIGHT. VERIFICATION OF NEWTON’S SECOND LAW BY A CONFINED FLOW OF RADIATION IN A REFLECTIVE CAVITY 光的惯性。用反射腔内受限的辐射流验证牛顿第二定律
Anales AFA Pub Date : 2023-09-28 DOI: 10.31527/analesafa.2023.34.3.51
C. M. Figueroa, S. Saracho
{"title":"THE INERTIA OF LIGHT. VERIFICATION OF NEWTON’S SECOND LAW BY A CONFINED FLOW OF RADIATION IN A REFLECTIVE CAVITY","authors":"C. M. Figueroa, S. Saracho","doi":"10.31527/analesafa.2023.34.3.51","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.3.51","url":null,"abstract":"In 1904, the Austrian physicist Fritz Hasenöhrl examined by means of mental experiments the black body radiation in a reflecting cavity. By calculating the work required to keep the cavity moving at constant velocity in opposition to the radiation pressure, he calculated for the radiation energy a value equivalent to E =38mc2 relation corrected in 1905 to E=34mc2. This relation establishes an equivalence between mass m and radiation energy E and was finally corrected to the present known form E = mc2 by Einstein. The conclusion from these deductions is that light has mass and inertia. Based on a thought experiment inspired by Hasenöhrl’s, in which we accelerate a reflecting cavity containing an internal radiation flux, we conclude that, under certain conditions of motion, light verifies Newton’s 2nd Law of Inertia","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
22C GROUND STATE DESCRIPTION 22c基态描述
Anales AFA Pub Date : 2023-09-28 DOI: 10.31527/analesafa.2023.34.3.71
F.N. Gerdau, R.M. Id Betan
{"title":"22C GROUND STATE DESCRIPTION","authors":"F.N. Gerdau, R.M. Id Betan","doi":"10.31527/analesafa.2023.34.3.71","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.3.71","url":null,"abstract":"The neutron drip line presents exotic nuclear structures. In this work, we study 22C, a Borromean isotope of carbon. The Gamow Shell model was used to understand its properties. A Woods-Saxon plus Gaussian mean field defined the single-particle basis. The root means square of the radius was calculated.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EVALUATION OF THE HELIOSAT-4 AND MCCLEAR MODELS FOR SOLAR GLOBALIRRADIATION ESTIMATE AT TWO SITES IN ARGENTINA 对heliosat-4和McClear模式在阿根廷两个地点估算太阳总辐射的评估
Anales AFA Pub Date : 2023-09-28 DOI: 10.31527/analesafa.2023.34.3.76
A.R. Lusi, F. Orte, R. Alonso Suárez, R. D’Elía, E. Wolfram
{"title":"EVALUATION OF THE HELIOSAT-4 AND MCCLEAR MODELS FOR SOLAR GLOBALIRRADIATION ESTIMATE AT TWO SITES IN ARGENTINA","authors":"A.R. Lusi, F. Orte, R. Alonso Suárez, R. D’Elía, E. Wolfram","doi":"10.31527/analesafa.2023.34.3.76","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.3.76","url":null,"abstract":"Satellite-derived solar radiation information is necessary for assessing the financial risk of solar energy projects at arbitrary locations. These estimates must be evaluated against high-quality ground measurements to ensure the reliability of the information. In this work, 15-minute Global Horizontal Irradiance (GHI) data from the Heliosat-4 model for all-sky conditions and the McClear model for clear-sky conditions were evaluated against ground-based measurements at two Saver-Net stations (http: //www.savernetsatreps.org): Pilar (Córdoba) and Villa Martelli (Buenos Aires). Clear sky detection of the measurements was done using the modified clarity index and analyzing the variability of consecutive measurements. A bias close to -5.5 % was found for the Heliosat-4 model at both sites and 1.15 % and -0.73 % for the MCClear model in Pilar and Villa Martelli, respectively. Furthermore, the relative root mean square error (rRMSD) was2 % and 20 % for the McClear and Heliosat-4 models, respectively at both sites.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135427403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
CÓMO USAR LA TERMODINÁMICA PARA TRATAR ALGUNOS SISTEMASTÉRMICOS FUERA DE EQUILIBRIO 如何利用热力学来处理一些非平衡热系统
IF 0.3
Anales AFA Pub Date : 2023-06-28 DOI: 10.31527/analesafa.2023.34.2.38
E. N. Miranda
{"title":"CÓMO USAR LA TERMODINÁMICA PARA TRATAR ALGUNOS SISTEMASTÉRMICOS FUERA DE EQUILIBRIO","authors":"E. N. Miranda","doi":"10.31527/analesafa.2023.34.2.38","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.2.38","url":null,"abstract":"It is shown at a level suitable for an undergraduate student that thermodynamics can be used to deal with certain thermal systems out of equilibrium. The trick is to cut the system in parts or slides small enough so that the thermodynamic magnitudes have constant values inside them. As an example, an ideal gas in a thermal gradient is considered. It is shown that a density gradient appears as a consequence of the thermal one. It is also briefly considered the heat conduction in a rod; it is shown that the entropy production rate can be calculated both for the reservoirs and the rod.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"104 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76404102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
RENORMALIZED GROUND STATE ALPHA DECAY OF 212Po 212Po的重整基态α衰变
IF 0.3
Anales AFA Pub Date : 2023-06-28 DOI: 10.31527/analesafa.2023.34.2.33
A. Dassie', R. I. Id Betan
{"title":"RENORMALIZED GROUND STATE ALPHA DECAY OF 212Po","authors":"A. Dassie', R. I. Id Betan","doi":"10.31527/analesafa.2023.34.2.33","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.2.33","url":null,"abstract":"In the present work, we use the complex-energy shell model formalism to describe the alpha decay of the 212Po nucleus. Single-particle bases constructed from Woods-Saxon potentials are used to build many-body basis. Spin-isospinGaussian effective interaction between all pairs of nucleons is considered. Four-body spectroscopic factor and single-particle width are calculated. The stability of the spectroscopic factor renormalization protocol is demonstrated, thus ensuring its physical significance, and its influence on the calculated alpha decay is presented. It is observed that the renormalization modifies the calculated half-life by∼40 %, which is a value three times larger than the experimental. Still, without appealing to any cluster structure from the beginning, i.e., all calculations were carried out using single nucleon degree of freedom.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"21 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84624737","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
EFFECT OF AQUEOUS EXTRACTS OF Phyllanthus sellowianusON THE VISCOELASTICPROPERTIES OF HUMAN RED BLOOD CELLS:IN VITRO ANTIDIABETIC ACTIVITY 余甘子水提物对人红细胞粘弹性的影响:体外抗糖尿病活性
IF 0.3
Anales AFA Pub Date : 2023-06-28 DOI: 10.31527/analesafa.2023.34.2.42
H. Mascaro Grosso, P. Buszniez, H. Castellini, B. Riquelme
{"title":"EFFECT OF AQUEOUS EXTRACTS OF Phyllanthus sellowianusON THE VISCOELASTICPROPERTIES OF HUMAN RED BLOOD CELLS:IN VITRO ANTIDIABETIC ACTIVITY","authors":"H. Mascaro Grosso, P. Buszniez, H. Castellini, B. Riquelme","doi":"10.31527/analesafa.2023.34.2.42","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.2.42","url":null,"abstract":"Phyllanthus sellowianusMüll (Klotzch) Arg. is a native plant used for diabetes treatment. It is currently of interest to evaluate its activity on the mechanical properties of human red blood cells to elucidate its mechanism of action as an antidiabetic. For this, aqueous extracts were prepared by various extractive techniques. Using the Erythrocyte Rheo-meter, the in Vitro effect on the viscoelastic parameters of glycated human red blood cells, as occurs by hyperglycemia in diabetes, was evaluated. The results obtained from the treatment with the extracts show that they affect erythrocyte viscoelasticity and can reverse the glycation effects.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"19 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87144055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A NEW HORIZON FOR PRECISE AND HIGH ACCURACY BIOLOGICAL MEASUREMENTS 精确和高精度生物测量的新领域
IF 0.3
Anales AFA Pub Date : 2023-06-28 DOI: 10.31527/analesafa.2023.34.2.46
B. Tenaglia Giunta, R. Napán
{"title":"A NEW HORIZON FOR PRECISE AND HIGH ACCURACY BIOLOGICAL MEASUREMENTS","authors":"B. Tenaglia Giunta, R. Napán","doi":"10.31527/analesafa.2023.34.2.46","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.2.46","url":null,"abstract":"Thinking of metrology as part of biotechnology can be unimaginable. However, in the last 25 years a group of scientists have been working on it and a new concept is gaining popularity among the scientific community: biometrology. For this reason, this publication aims to bring the reader closer to the scientific background on the science of measurement applied to biotechnology. A brief introduction to the topic will be made, addressing it with examples of its different applications to end with the presentation of a definition focused on the life sciences.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"32 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87948910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
DIGITAL HOLOGRAPHIC INTERFEROMETRY AS A METHOD FOR ANALYZING LASER-INDUCED MICRODILATION PROCESS 数字全息干涉法分析激光诱导微膨胀过程
IF 0.3
Anales AFA Pub Date : 2023-03-28 DOI: 10.31527/analesafa.2023.34.1.1
A. Götte, R. Alarcón Lasagno, C. Beltrame, G. Romero, F. Vincitorio, A. Ramil, A. López
{"title":"DIGITAL HOLOGRAPHIC INTERFEROMETRY AS A METHOD FOR ANALYZING LASER-INDUCED MICRODILATION PROCESS","authors":"A. Götte, R. Alarcón Lasagno, C. Beltrame, G. Romero, F. Vincitorio, A. Ramil, A. López","doi":"10.31527/analesafa.2023.34.1.1","DOIUrl":"https://doi.org/10.31527/analesafa.2023.34.1.1","url":null,"abstract":"This paper presents the use of digital holography interferometry applied to the study of microdilation process. The optical setup with the use of CCD cameras allowed to obtain interferograms on different study objects, whereas a localized thermal load was induced by a 5.5 W 405 nm laser. This study was done over two samples with different thermal conductivity in order to calibrate this process. The main objective of this work was to understand the thermo-mechanical response on LED-based illumination devices due to the transition in the on-off process. The results show that these kind of lamps function under mechanical stress because of the different dilation processes of each component of the device.","PeriodicalId":41478,"journal":{"name":"Anales AFA","volume":"67 1","pages":""},"PeriodicalIF":0.3,"publicationDate":"2023-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86078427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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