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Auteur Fatima Benrachi |
Documents disponibles écrits par cet auteur (6)
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Titre : Apport de l’imagerie médicale dans le traitement des cancers ORL. Type de document : texte imprimé Auteurs : Bouchra Imene Chibane, Auteur ; Fatima Benrachi, Directeur de thèse Mention d'édition : 19/03/2020 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2020 Importance : 85 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Rayonnements et physique medicale Radiothérapie adaptative dosimétrie planification de traitement VMAT cancer du nasopharynx imagerie médicale Adaptive radiotherapy treatment planification nasopharyngeal cancer medical imaging العلاج الإشعاعي التكيفي قياس الجرعات تخطيط العلاج سرطان البلعوم الأنفي التصوير الطبي Index. décimale : 530 Physique Résumé :
The principle of external radiotherapy in the treatment of nasopharyngeal cancer is to deliver a total dose of 70Gy over 6.5 to 7 weeks of treatment. This dose is calculated from anatomical data from an initial CT (Computed Tomography) imaging acquired before the start of treatment. However, it is suggested that the acquisition of a single CT imaging is not sufficient to follow the anatomical changes and their dosimetric consequences occurring during treatment by external radiotherapy. The multiple and regular acquisition of CT imaging and replanning during treatment seems to be able to monitor anatomical changes and their dosimetric impacts. Our work focuses on the adaptation of VMAT radiotherapy treatments by exploring the anatomical and dosimetric indicators that can help make a decision on the need of a replanification and the appropriate time for, and to highlight the contribution of adaptive radiotherapy in the treatment of patients with nasopharyngeal cancer. To do this, the volumetric changes of the parotid glands, the target volume GTV N70, and the external contour of these patients were evaluated and compared based on 3D imaging acquired throughout the treatment. In addition, the dosimetric variations of the V30 of the two parotid glands, the D95 of the GTV N70, the D2 of the brain stem and the spinal cord were quantified from the plans calculated for each acquired CT imaging. The results of our work show that a second CT imaging performed after the third week of treatment is necessary and sufficient for the identification of anatomical changes and the monitoring of dosimetric consequences, in order to improve tumor control of the disease and the quality of life of patients.
Diplôme : Doctorat En ligne : ../theses/physique/CHI7623.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11459 Apport de l’imagerie médicale dans le traitement des cancers ORL. [texte imprimé] / Bouchra Imene Chibane, Auteur ; Fatima Benrachi, Directeur de thèse . - 19/03/2020 . - جامعة الإخوة منتوري قسنطينة, 2020 . - 85 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Rayonnements et physique medicale Radiothérapie adaptative dosimétrie planification de traitement VMAT cancer du nasopharynx imagerie médicale Adaptive radiotherapy treatment planification nasopharyngeal cancer medical imaging العلاج الإشعاعي التكيفي قياس الجرعات تخطيط العلاج سرطان البلعوم الأنفي التصوير الطبي Index. décimale : 530 Physique Résumé :
The principle of external radiotherapy in the treatment of nasopharyngeal cancer is to deliver a total dose of 70Gy over 6.5 to 7 weeks of treatment. This dose is calculated from anatomical data from an initial CT (Computed Tomography) imaging acquired before the start of treatment. However, it is suggested that the acquisition of a single CT imaging is not sufficient to follow the anatomical changes and their dosimetric consequences occurring during treatment by external radiotherapy. The multiple and regular acquisition of CT imaging and replanning during treatment seems to be able to monitor anatomical changes and their dosimetric impacts. Our work focuses on the adaptation of VMAT radiotherapy treatments by exploring the anatomical and dosimetric indicators that can help make a decision on the need of a replanification and the appropriate time for, and to highlight the contribution of adaptive radiotherapy in the treatment of patients with nasopharyngeal cancer. To do this, the volumetric changes of the parotid glands, the target volume GTV N70, and the external contour of these patients were evaluated and compared based on 3D imaging acquired throughout the treatment. In addition, the dosimetric variations of the V30 of the two parotid glands, the D95 of the GTV N70, the D2 of the brain stem and the spinal cord were quantified from the plans calculated for each acquired CT imaging. The results of our work show that a second CT imaging performed after the third week of treatment is necessary and sufficient for the identification of anatomical changes and the monitoring of dosimetric consequences, in order to improve tumor control of the disease and the quality of life of patients.
Diplôme : Doctorat En ligne : ../theses/physique/CHI7623.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11459 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité CHI/7623 CHI/7623 Thèse Bibliothèque principale Thèses Disponible Étude de l’effet monopolaire sur les noyaux impair-impairs dans la région de l’étain 132. / Nadjet Laouet
Titre : Étude de l’effet monopolaire sur les noyaux impair-impairs dans la région de l’étain 132. Type de document : texte imprimé Auteurs : Nadjet Laouet, Auteur ; Fatima Benrachi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2017 Importance : 73 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles. Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Modèle en Couches Nucléaires Systèmes Particule-Trous Interaction Monopolaire Évolution de Couches Code Oxbash Région 132Sn Noyaux Impair-Impairs Propriétés électromagnétiques Nuclear Shell Model Particle-Hole systems Monopole Interaction Shell evolution Oxbash code 132Sn Mass Region Odd-Odd Nuclei Electromagnetic Properties النموذج الطبقي الأنظمة جسيمة-ثقب التفاعل أحادي القطب تغير الطبقات البرنامج Oxbashالمنطقة الكتلية 132Snالأنوية فردي-فردي الخصائص الكهرومغناطيسية" Index. décimale : 530 Physique Résumé : The monopole interaction, which result from the interaction between the magic core and the valence particles, has a particular interest in the study of nuclear structure and in the comprehension of the appearance of new magic numbers.
In this thesis, the study is founded on the calculation of the excitation energies and the electromagnetic properties of odd-odd nuclei with few hole or few particles in addition to the 132Sn core: 128Ag, 130In, 132-134-136-138Sb, 134-136I and 136-138Cs.
Basing on the interactions jj45apn, sn100pn and kh5082 with the model spaces jj45pn, jj55pn and jj56pn, we have realised some modifications considering the monopole interaction. New interactions named jj45pnh, snh, cdbm and mkh are then elaborated. The recent values of single particle and single hole energies are used. The calculations are realised in the frame work of the nuclear shell model by means of Oxbash nuclear structure code.
The effective charges ep=1.35e and en=0.9e, leading to reproduce the experimental values of the electromagnetic reduced transition probabilities B(M1) and B(E2) and the moments Q and µ are used in the calculations.
The getting results are in agreement with the experimental data and better than other calculation results.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/LAO7197.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10766 Étude de l’effet monopolaire sur les noyaux impair-impairs dans la région de l’étain 132. [texte imprimé] / Nadjet Laouet, Auteur ; Fatima Benrachi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2017 . - 73 f. ; 30 cm.
2 copies imprimées disponibles.
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Modèle en Couches Nucléaires Systèmes Particule-Trous Interaction Monopolaire Évolution de Couches Code Oxbash Région 132Sn Noyaux Impair-Impairs Propriétés électromagnétiques Nuclear Shell Model Particle-Hole systems Monopole Interaction Shell evolution Oxbash code 132Sn Mass Region Odd-Odd Nuclei Electromagnetic Properties النموذج الطبقي الأنظمة جسيمة-ثقب التفاعل أحادي القطب تغير الطبقات البرنامج Oxbashالمنطقة الكتلية 132Snالأنوية فردي-فردي الخصائص الكهرومغناطيسية" Index. décimale : 530 Physique Résumé : The monopole interaction, which result from the interaction between the magic core and the valence particles, has a particular interest in the study of nuclear structure and in the comprehension of the appearance of new magic numbers.
In this thesis, the study is founded on the calculation of the excitation energies and the electromagnetic properties of odd-odd nuclei with few hole or few particles in addition to the 132Sn core: 128Ag, 130In, 132-134-136-138Sb, 134-136I and 136-138Cs.
Basing on the interactions jj45apn, sn100pn and kh5082 with the model spaces jj45pn, jj55pn and jj56pn, we have realised some modifications considering the monopole interaction. New interactions named jj45pnh, snh, cdbm and mkh are then elaborated. The recent values of single particle and single hole energies are used. The calculations are realised in the frame work of the nuclear shell model by means of Oxbash nuclear structure code.
The effective charges ep=1.35e and en=0.9e, leading to reproduce the experimental values of the electromagnetic reduced transition probabilities B(M1) and B(E2) and the moments Q and µ are used in the calculations.
The getting results are in agreement with the experimental data and better than other calculation results.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/LAO7197.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10766 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité LAO/7197 LAO/7197 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude expérimentale de mesures de basses radioactivités dans les matériaux de construction utilises en Algérie. Type de document : texte imprimé Auteurs : Esma Saadi, Auteur ; Fatima Benrachi, Directeur de thèse ; A. Azbouche, Directeur de thèse Mention d'édition : 18/02/2021 Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2021 Importance : 113 f. Format : 30 cm. Note générale : Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : physique: Rayonnements et physique medicale Matériaux de construction radioactivité naturelle détecteur GeHP risques radiologiques analyse statistique Construction materials natural Radioactivity HPGe Detector radiological hazard statistical analysis مواد البناء نشاط إشعاعي طبيعي كاشف GeHPمخاطر إشعاعية تحليل إحصائي Index. décimale : 530 Physique Résumé :
Building materials are classified as a source of radioactive contamination because of their content of natural radionuclides, mainly uranium, thorium and their progeny products besides potassium. This may be related to their natural composition of soil and rocks. In order to estimate the harmful effects of ionizing radiation emitted by building materials, a broad research on the levels of natural radioactivity must be developed. The objective of this work is to study the distribution of natural radioactivity in construction materials used in Algeria. 31 samples of different types of materials were collected. The concentration measurements of activities resulting from the decay of 238U (226Ra), 235U and 232Th, as well as the primordial isotope 40K in these samples were carried out using gamma spectrometry technique, by means of a high purity germanium detector (HPGe). The average activities of 226Ra, 232Th and 40K are 16.05 ± 0.53 Bq.kg-1, 17.44 ± 0.97 Bq.kg-1 and 260.31 ± 6.81 Bq.kg-1, respectively. These values are lower than the global average values. The presence of 137Cs the anthropogenic radionuclide was found in three sand samples with very low activities. Received doses and radiological hazard parameters were calculated and compared to the global average values. A comparison of the results obtained in this study with the literature was made. In addition, a statistical analysis was performed and discussed for the obtained data.
Diplôme : Doctorat En ligne : ../theses/physique/SAA7740.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11573 Étude expérimentale de mesures de basses radioactivités dans les matériaux de construction utilises en Algérie. [texte imprimé] / Esma Saadi, Auteur ; Fatima Benrachi, Directeur de thèse ; A. Azbouche, Directeur de thèse . - 18/02/2021 . - جامعة الإخوة منتوري قسنطينة, 2021 . - 113 f. ; 30 cm.
Doctorat 3éme CYCLE LMD.
1 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : physique: Rayonnements et physique medicale Matériaux de construction radioactivité naturelle détecteur GeHP risques radiologiques analyse statistique Construction materials natural Radioactivity HPGe Detector radiological hazard statistical analysis مواد البناء نشاط إشعاعي طبيعي كاشف GeHPمخاطر إشعاعية تحليل إحصائي Index. décimale : 530 Physique Résumé :
Building materials are classified as a source of radioactive contamination because of their content of natural radionuclides, mainly uranium, thorium and their progeny products besides potassium. This may be related to their natural composition of soil and rocks. In order to estimate the harmful effects of ionizing radiation emitted by building materials, a broad research on the levels of natural radioactivity must be developed. The objective of this work is to study the distribution of natural radioactivity in construction materials used in Algeria. 31 samples of different types of materials were collected. The concentration measurements of activities resulting from the decay of 238U (226Ra), 235U and 232Th, as well as the primordial isotope 40K in these samples were carried out using gamma spectrometry technique, by means of a high purity germanium detector (HPGe). The average activities of 226Ra, 232Th and 40K are 16.05 ± 0.53 Bq.kg-1, 17.44 ± 0.97 Bq.kg-1 and 260.31 ± 6.81 Bq.kg-1, respectively. These values are lower than the global average values. The presence of 137Cs the anthropogenic radionuclide was found in three sand samples with very low activities. Received doses and radiological hazard parameters were calculated and compared to the global average values. A comparison of the results obtained in this study with the literature was made. In addition, a statistical analysis was performed and discussed for the obtained data.
Diplôme : Doctorat En ligne : ../theses/physique/SAA7740.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=11573 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité SAA/7740 SAA/7740 Thèse Bibliothèque principale Thèses Disponible
Titre : Etude de la radioactivité naturelle et artificielle dans les fertilisants et le sol de l’Est algérien par spectrométrie gamma. Type de document : texte imprimé Auteurs : Amina Bramki, Auteur ; Mourad Ramdhane, Directeur de thèse ; Fatima Benrachi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 170 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : La spectroscopie gamma concentrations d'activité Fertilisant échantillons de sol le risque radiologique facteur de risque excessif de cancer à vie gamma spectroscopy activity concentrations fertilizer soil samples radiological risk excessive risk factor for lifetime cancer المطيافية غاما تركيزات النشاط السماد عينات التربة المخاطر الإشعاعية عامل خطر الإصابة بالسرطان خلال العمر Index. décimale : 530 Physique Résumé : The aim of this study is to evaluate the level of natural radioactivity in seven fertilizers from two different regions, Constantine and Mila in Algeria, and in fertilized and unfertilized soil samples collected at different depths in two pilot and private Algerian farms, from El-Athmania and Ferdjioua, Mila, respectively. Using gamma spectroscopy with a hyper-pure germanium detector (HPGe), a low background configuration and high-resolution.
The activity concentration ranges of 226Ra, 232Th and 40K in the soil samples were found at 23.72 ± 2.37 «-ÿ 67.72 ± 7.77, 26.45 ± 0.78 <-ÿ 28.70 ± 0.90 and 178.5 ± 5.64 <-ÿ 290.1 ± 10.5 Bq.kg"" , respectively. The results of this current study have been compared with the world mean values of 35, 30 and 400 Bq.kg""1, respectively, specified by the UNSCEAR (2000). The artificial radionuclide, 137Cs was found in all measured soil samples and its mean activity was 2.66 Bq.Kg'1. Additionally, the vertical distribution of 137Cs soil activity concentrations was studied in this current study. It can assumed from the results the decrease of 137Cs as a function of depth. i Concerning radiological risk to human health, the absorbed gamma dose rate (D) in air is estimated to be between 36.23 ± 0.4 and 58.78 ± 2.2 nGy.h'1; the outdoor annual effective dose equivalent (DE) was evaluated to vary from 44.44 ± 0.4 to 69.88 ± 2.7 pSv.y'1, with the arithmetic mean value of 61.43 ± 33.23 pSv.y""1, which is comparable to the worldwide effective dose of 70 pSv.y""1. Also, the Raeq, Hex, Hm and Iy values for all soil samples in this work are lower than the accepted safety limit of 370 Bq.kg'1 and below the unit limit, respectively. The results indicate that the radiation hazard of primordial radionuclides in all soil samples of the regions studied in this current work is not significant. On the other hand, the mean value of the lifetime cancer risk factor for fertilizers studied is 9.45 x 10""4. Two (2) sampling points (FM and TSP) have ELCR values greater than the worldwide average value. These results show that lifetime cancer risk from exposure to these fertilizers for up to 70 years is high in both locations. Therefore, subsequent use of this product for agriculture or for soil remediation studies and other purposes should be discouraged.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BRA7331.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10981 Etude de la radioactivité naturelle et artificielle dans les fertilisants et le sol de l’Est algérien par spectrométrie gamma. [texte imprimé] / Amina Bramki, Auteur ; Mourad Ramdhane, Directeur de thèse ; Fatima Benrachi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 170 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : La spectroscopie gamma concentrations d'activité Fertilisant échantillons de sol le risque radiologique facteur de risque excessif de cancer à vie gamma spectroscopy activity concentrations fertilizer soil samples radiological risk excessive risk factor for lifetime cancer المطيافية غاما تركيزات النشاط السماد عينات التربة المخاطر الإشعاعية عامل خطر الإصابة بالسرطان خلال العمر Index. décimale : 530 Physique Résumé : The aim of this study is to evaluate the level of natural radioactivity in seven fertilizers from two different regions, Constantine and Mila in Algeria, and in fertilized and unfertilized soil samples collected at different depths in two pilot and private Algerian farms, from El-Athmania and Ferdjioua, Mila, respectively. Using gamma spectroscopy with a hyper-pure germanium detector (HPGe), a low background configuration and high-resolution.
The activity concentration ranges of 226Ra, 232Th and 40K in the soil samples were found at 23.72 ± 2.37 «-ÿ 67.72 ± 7.77, 26.45 ± 0.78 <-ÿ 28.70 ± 0.90 and 178.5 ± 5.64 <-ÿ 290.1 ± 10.5 Bq.kg"" , respectively. The results of this current study have been compared with the world mean values of 35, 30 and 400 Bq.kg""1, respectively, specified by the UNSCEAR (2000). The artificial radionuclide, 137Cs was found in all measured soil samples and its mean activity was 2.66 Bq.Kg'1. Additionally, the vertical distribution of 137Cs soil activity concentrations was studied in this current study. It can assumed from the results the decrease of 137Cs as a function of depth. i Concerning radiological risk to human health, the absorbed gamma dose rate (D) in air is estimated to be between 36.23 ± 0.4 and 58.78 ± 2.2 nGy.h'1; the outdoor annual effective dose equivalent (DE) was evaluated to vary from 44.44 ± 0.4 to 69.88 ± 2.7 pSv.y'1, with the arithmetic mean value of 61.43 ± 33.23 pSv.y""1, which is comparable to the worldwide effective dose of 70 pSv.y""1. Also, the Raeq, Hex, Hm and Iy values for all soil samples in this work are lower than the accepted safety limit of 370 Bq.kg'1 and below the unit limit, respectively. The results indicate that the radiation hazard of primordial radionuclides in all soil samples of the regions studied in this current work is not significant. On the other hand, the mean value of the lifetime cancer risk factor for fertilizers studied is 9.45 x 10""4. Two (2) sampling points (FM and TSP) have ELCR values greater than the worldwide average value. These results show that lifetime cancer risk from exposure to these fertilizers for up to 70 years is high in both locations. Therefore, subsequent use of this product for agriculture or for soil remediation studies and other purposes should be discouraged.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BRA7331.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10981 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BRA/7331 BRA/7331 Thèse Bibliothèque principale Thèses Disponible
Titre : Étude de la répartition de radionucléides présents dans les lacs de barrages artificiels. : Applications Barrage de Beni Haroun. Type de document : texte imprimé Auteurs : Ghania Bouhila, Auteur ; Fatima Benrachi, Directeur de thèse Editeur : جامعة الإخوة منتوري قسنطينة Année de publication : 2018 Importance : 90 f. Format : 30 cm. Note générale : 2 copies imprimées disponibles
Langues : Français (fre) Catégories : Français - Anglais
PhysiqueTags : Sédiments Radioactivités naturelles détecteur GeHP Risques de rayonnement Analyse statistique multi-variée Sediment Natural Radioactivity HPGe Detector Radiation Hazards Multivariate statistical analysis لرواسب الاشعاع الطبيعي كاشف GeΗΡخطر الأشعة التحليل الإحصائي متعدد المتغيرات Index. décimale : 530 Physique Résumé : Since its creation, the earth has always been bathed in a cocktail of natural radioactivity. Its content varies from location to another and from depth to another. Radiations arisen from these radionuclides constitutes hazard to human health. Therefore the radioactivity measurement is necessary to evaluate the effects of these radiations.
In the recent years, many studies give an importance to activity concentration measurements of natural radionuclides in sediment which plays an important role in aquatic ecosystems. It is considered the main source of continuous radiation exposure of human and as considered a medium of migration for the transfer of radionuclides to the biological systems.
The aim of the present work is to study the distribution of natural radioactivity in Beni Haroun dam; the largest dam in Algeria. For this reason, sediment samples collected from different locations in this dam and from rivers feeding it. Activity concentration measurements of natural radionuclides in these samples were carried out using a high purity germanium detector (HPGe).
The 226Ra, 232Th and 40K mean activity were found to be 23.48 ± 3.85, 23.48±14.03 and 196.28± 31.00 Bq/kg, respectively. Also, radiological hazard parameters due to these sediment samples were estimated based on these specific activities. Finally, the results of the present study were discussed and compared with internationally recommended values.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7243.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10811 Étude de la répartition de radionucléides présents dans les lacs de barrages artificiels. : Applications Barrage de Beni Haroun. [texte imprimé] / Ghania Bouhila, Auteur ; Fatima Benrachi, Directeur de thèse . - جامعة الإخوة منتوري قسنطينة, 2018 . - 90 f. ; 30 cm.
2 copies imprimées disponibles
Langues : Français (fre)
Catégories : Français - Anglais
PhysiqueTags : Sédiments Radioactivités naturelles détecteur GeHP Risques de rayonnement Analyse statistique multi-variée Sediment Natural Radioactivity HPGe Detector Radiation Hazards Multivariate statistical analysis لرواسب الاشعاع الطبيعي كاشف GeΗΡخطر الأشعة التحليل الإحصائي متعدد المتغيرات Index. décimale : 530 Physique Résumé : Since its creation, the earth has always been bathed in a cocktail of natural radioactivity. Its content varies from location to another and from depth to another. Radiations arisen from these radionuclides constitutes hazard to human health. Therefore the radioactivity measurement is necessary to evaluate the effects of these radiations.
In the recent years, many studies give an importance to activity concentration measurements of natural radionuclides in sediment which plays an important role in aquatic ecosystems. It is considered the main source of continuous radiation exposure of human and as considered a medium of migration for the transfer of radionuclides to the biological systems.
The aim of the present work is to study the distribution of natural radioactivity in Beni Haroun dam; the largest dam in Algeria. For this reason, sediment samples collected from different locations in this dam and from rivers feeding it. Activity concentration measurements of natural radionuclides in these samples were carried out using a high purity germanium detector (HPGe).
The 226Ra, 232Th and 40K mean activity were found to be 23.48 ± 3.85, 23.48±14.03 and 196.28± 31.00 Bq/kg, respectively. Also, radiological hazard parameters due to these sediment samples were estimated based on these specific activities. Finally, the results of the present study were discussed and compared with internationally recommended values.
Diplôme : Doctorat en sciences En ligne : ../theses/physique/BOU7243.pdf Format de la ressource électronique : Permalink : index.php?lvl=notice_display&id=10811 Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité BOU/7243 BOU/7243 Thèse Bibliothèque principale Thèses Disponible
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