FOUZIA Bouchelaghem

LAKEL Abdelkader

Application of Logistic Regression for the Prediction of Thyroid Disease Recurrence: Machine Learning Approach

AROUSSI, Chaima , DEBIH, Choumeyssa

Formation à la radiothérapie externe et interne du cancer.

Attoui Dounya

Initiation au développement d’un système dosimétrique digital pour la détection des rayonnements

AROUSSI, Chaima , DEBIH, Choumeyssa

Formation à la radiothérapie externe et interne du cancer

شيكوش منصف

تحديد الخواص الفيزيائية الحرارية للغازات أحادية الذرة تتكون من غازات نادرة

Reguig Ikram

Les effets quantiques dans le cas des ions K+ évoluant dans un gaz neutre K aux basses énergies

ABDELHAFID Cheyma , BEN CHARIF Chaima

Propriétés de transport dans les collisions ion - atome

Since statistical physics and quantum mechanics were first successfully combined thanks in part to the work of Chapman and Cowling and Hirschfelder. Extensive theoretical and experimental research has been dedicated to understanding the kinetics of gases and gas mixtures. This integration has, among other achievements, theoretically established a direct link between the macroscopic properties of gases whether measured or calculated and the quantum characteristics of their constituent particles. This model successfully established straightforward mathematical relationships linking the microscopic interactions between the atomic and/or molecular components of a gas to measurable transport properties, such as diffusion and viscosity coefficients. It also provided explanations for how these properties vary and how they are influenced by thermodynamic parameters like pressure, density, and temperature.

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Fouzia Bouchelaghem , , (2025-07-22), New determination of the thermophysical properties of argon gas considering nuclear spin and symmetry effects, Journal of Molecular Modeling, Vol:31, Issue:215, pages:1-9, Springer

Thyroid cancer recurrence remains a significant clinical concern despite standard treatments such as surgery followed by radiotherapy. This study aims to compare recurrence rates between patients treated with radiotherapy versus immunotherapy, with a focus on sex differences and biological hypotheses that may explain variability in treatment response. A cohort of over 5,000 thyroid cancer patients was analyzed, stratified by treatment type (radiotherapy or immunotherapy). Recurrence rates were calculated and cross-tabulated with sex. Further analysis explored treatment timing, potential biological influences such as hormone interactions, and adherence patterns. Recurrence after radiotherapy was notably higher than after immunotherapy, particularly among male patients (7.5% vs. 0%). The absence of recurrence in the immunotherapy group raises questions about selection bias, treatment indication severity, or a genuinely higher therapeutic efficacy. Additionally, sex-based differences in immune response and hormonal regulation may underlie this divergence. Immunotherapy shows promise as a potentially more favorable treatment option for select patients with thyroid cancer, possibly due to enhanced immune responsiveness or fewer systemic disruptions. Further investigations are warranted to validate these findings, explore sex-specific treatment strategies, and integrate biological markers into future clinical decision-making.

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Fouzia Bouchelaghem , ,(2025-06-25), Machine learning for the prediction of recurrence after radiotherapy and immunotherapy in thyroid cancer: Identification of clinical and biological signatures.,17th International Conference on Nuclear Structure Properties (NSP2025), June 25 – 27, 2025, Sivas Cumhuriyet University, Sivas, Türkiye,Sivas, Turquie

Only few (n,d) measured cross section exists with heigh uncertainties for 20 elements 7 ≤ A ≤ 96. The difficulty of measure in nuclear reactor (short lifetime of target nuclei or their very low abundance) is the reason of this poor data. Therefore, the systematic (n,d) reaction cross section at 14–15 MeV neutron energy is used to reproduce measured data and predict unmeasured one. A new semi empirical formula for (n, d) nuclear reaction is proposed to calculate function excitation at 14‐15 MeV, with three adjustable parameters this systematic proofs the contribution of pre‐equilibrium deuterium particle emission. To check the formula’s quality we compare obtained cross section with measured one. The formula obtained has a good fitting with lower values of Σ and χ2

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Fouzia Bouchelaghem , ,(2025-06-25), Novel systematic for (n,d) reaction cross section at 14‐15 MeV,17th International Conference on Nuclear Structure Properties (NSP2025),Sivas Cumhuriyet University, Saivs, Türkiye

Medical physics plays a crucial role in improving the treatment of thyroid diseases, particularly through advanced diagnostic techniques such as thyroid scintigraphy, magnetic resonance imaging (MRI), and positron emission tomography (PET scan). These tools help characterize thyroid physiology and assess disease progression, especially in the post-treatment follow-up of patients with thyroid cancer. However, the recurrence of thyroid diseases remains a major clinical challenge. Predicting the risk of recurrence using machine learning techniques—particularly logistic regression—offers promising solutions. In this study, we focus on integrating data from clinical examinations and imaging tools provided by medical physics to develop a predictive model based on logistic regression. This model aims to anticipate the recurrence of thyroid diseases by leveraging clinical variables such as age, sex, thyroid function, TNM stages, treatment responses, and findings from physical and radiological examinations. The integration of medical physics and artificial intelligence through machine learning techniques represents a significant advancement in predictive medicine.

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Samra Nehaoua , Fouzia Bouchelaghem , ,(2025-06-25), machine learning for the prediction of the recurrence after radiotherapy and immunotherapy in thyroid cancer,17 international conference on nuclear structure properties (NSP2025),turkey

Thyroid cancer, especially in recurrent thyroid disease, requires a precise stratification of risks for appropriate management. This study presents a predictive model based on logistic regression with L1 regularization (lasso), designed to assess the risk of thyroid cancer in three levels: low, intermediate and high. The model uses clinical data and medical history to provide robust, actionable predictions. A preliminary analysis was also conducted to explore the potential link between recurrence of thyroid disease and high-risk class. Results suggest a significant correlation, with relapses appearing more frequently in high-risk patients.

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Fouzia Bouchelaghem , ,(2025-04-13), Stratification of Risk of Thyroid Cancer: A Machine Learning Model to Identify High-Risk Cases and Analyze the Link with Recurrence,The fourth International Conference on Radiations And Applications (ICRAA'4),Alger

Une nouvelle formule semi-empirique pour le calcul de la section efficace de la réaction (n, He-3) à une énergie de neutrons de 14,6 MeV est proposée. Elle est basée sur le modèle d'exciton sous forme fermée et le modèle de coalescence. La nouvelle formule, avec trois paramètres, offre un meilleur ajustement aux données que les formules comparables précédentes.

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Asma Ghezal , Samra Nehaoua , Fouzia Bouchelaghem , ,(2025-02-17), Analyse systématique des sections efficaces de la réaction (n,3He) à 14-15 MeV.,2nd National seminar of Physics, Chemistry and their Applications NSPCA'25,University Mohamed El Bachir El Ibrahimi of Bordj Bou Arreridj - Algeria

Dans le cadre de la prédiction des récidives des maladies thyroïdiennes, plusieurs modèles de machine learning ont été évalués pour leur capacité à distinguer les cas de récidive des non-récidives. Afin d'optimiser les performances des modèles, un test statistique Chi-Carré a été appliqué pour sélectionner les attributs les plus pertinents, permettant ainsi de réduire la dimensionnalité du jeu de données et de conserver uniquement les variables les plus influentes pour la prédiction. Les modèles évalués comprennent : • Régression Logistique (Logistic Regression) : Ce modèle de base a montré une grande efficacité dans la séparation des classes grâce à ses résultats parfaits en termes de précision et d’AUC ROC. • Random Forest Classifier : Un modèle d'ensemble robuste qui combine plusieurs arbres décisionnels pour améliorer la précision de la prédiction des récidives. • K-Nearest Neighbors (KNN) : Un modèle non paramétrique qui classifie les cas en fonction de la proximité avec les autres instances dans l’espace des caractéristiques. • Gradient Boosting Classifier : Un modèle puissant d'optimisation séquentielle, capable d'améliorer les prédictions en ajustant les erreurs des prédictions précédentes.

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Fouzia Bouchelaghem , ,(2025-02-17), Application de la Régression Logistique pour la Prédiction de la Récidive des Maladies Thyroïdiennes : Approche en Machine Learning,The 2ⁿᵈ National Seminar of Physics, Chemistry and their Applications NSPCA' 25,Bordj Bou Arreridj

" ندوة علمية عن بعد حو ل "الامن فى الطب النووي"

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FouziaBouchelaghem , ,(2025-01-21); Radiation Safety in Nuclear Medicine Course‎,مجموعة انفاس الطبية,

This study focuses on the quantum calculation of elastic collision cross section for He+ in their ground state (2S) with neutral helium atom He over a range of reduced kinetic energy between 10-12 and 10-1

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Fouzia Bouchelaghem , ,(2025-01-05), Transport coefficient of He+ in gaseous helium,Le 11 ème Séminaire National sur le Laser et ses Applications,Alger, Algerie

A semi-empirical formula is proposed to calculate excitation function for the (n, t) nuclear reaction at 14.6 MeV. This semi-empirical systematic contains free parameters fixed by experimental data, we use pre-equilibrium exciton model to describe tritium emission in nuclear reactions induced with rapid neutrons. To verify the quality of the proposed formula, we compare the obtained cross-section with measured ones. We found that calculated (n, t) excitation function is close to the experimental data and the proposed systematic better describes tritium emission for even-even nuclei target.

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Fouzia Bouchelaghem , ,(2024-12-15), New Semi-Empirical Formula for (n, t) Reaction Cross Sections,The First International Congress on Recent Advances in Mathematical, Physical and Chemical Sciences (1st-ICRAMPCS 2024),Constantine. Algeria

The quantum calculations of cross sections, diffusion coefficients, and mobility for elastic collisions of He+ ions in the ground state (2S) withneutral He atoms are determined over a range of 10⁻¹² ≤ ε ⋖10⁻¹, roughlycorresponding to the temperature range 10⁻⁹≤ T⋖10⁺²K Within the framework of the model developed by Chapman and Enskog [1, 2] for sufficientlydilutegases, we have thoroughlyexamined the self-diffusion properties of helium ions He+ in theirground state (2S) withintheir parent gas He (1S).

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Fouzia Bouchelaghem , ,(2024-09-25), Quantum Calculations of Cross Sections, Diffusion Coefficients, and Mobility for Elastic Collisions of Ground-State He+ Ions (2S) withNeutral He Atoms,First Conference on Atomic and Molecular Collisions:Theory and Applications,Ferhat ABBAS University-Setif1

A new three parameters formula for (n, 3 He) nuclear reaction is proposed to calculate function excitation at 14.6 MeV, this semi-empirical systematic reduces parameters taken in previous proposed formulae which increase the contribution of pre-equilibrium 3 He particle emission. We use exciton model in closed form and coalescence model to describe the pre-equilibrium 3 He particle emission in reaction induced by neutron. To check the formula’s quality we compare obtained cross section with measured ones. The formula obtained in this work has a good fitting with lower values of statistical parameters.

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Samra Nehaoua , Asma Ghezal , Fouzia Bouchelaghem , ,(2024-09-24), THEORICAL FORMULAE OF (n, 3 He) REACTION FUNCTION EXCITATION AT 14?6 MeV,NUPPAC'24,Egypt

This work is devoted to calculating the thermophysical properties of Argon and helium gases such as diffusion, viscosity, and thermal conductivity in a thermal field between 1K and 10000K, by the Chapman-Enskog model. The calculations, essentially quantal, are based on interatomic potential constructed from new and recent potential data points.

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Fouzia Bouchelaghem , ,(2024-09-23), Thermophysical properties of helium and argon gas.,13th Conference on Nuclear and Particle Physics (NUPPAC' 24),Marsa Matrouh Égypte

This work is devoted to calculating the potential-energy curves of helium ions in their gases such as He+(2s)− He(1s), when both species are in their ground states, are either gerade (g) or ungerade (u), namely, 2Σ+g or 2Σ+u in the field of energy 10−12 ≤ E ≤ 10−2( a.u.), using new and modern data. Elastic cross-sections have also been calculated and the isotope effect of the presence of 4He and 3He atoms has been addressed, taking into account the nuclear spin and analog effect emanating from similar and non-distinction between colliding atoms.

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Fouzia Bouchelaghem , ,(2024-09-23), Isotopic effects in the He+ - He collision at lower energies.,13th Conference on Nuclear and Particle Physics (NUPPAC' 24),Marsa Matrouh Égypte

semi empirical formula for (n, t) nuclear reaction is used to calculate function excitation at 14.6 MeV, this semi-empirical systematic with 3 parameters fixed by experimental data uses theoretical models to describe tritium emission in neutron reactions. To verify the proposed formula’s quality we compare obtained cross section with measured ones. Calculated (n, t) excitation function are closed to experimental excitation function. The formula obtained in this work describes better tritium emission.

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Fouzia Bouchelaghem , ,(2024-09-23), New semi empirical systematic of (n, t) reaction cross section,13th Conference on Nuclear and Particle Physics (NUPPAC' 24),Marsa Matrouh, Egypt

A new three parameters formula for (n, 3He) nuclear reaction is proposed to calculate function excitation at 14.6 MeV, this semi-empirical systematic reduces parameters taken in previous formulae which increase the contribution of pre-equilibrium 3He particle emission. We use exciton model in closed form and coalescence model to describe the pre-equilibrium 3He particle emission in reaction induced by rapid neutron. To check the formula’s quality we compare obtained cross section with measured ones. The formula obtained in this work has a good fitting with lower values of statistical parameters

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Fouzia Bouchelaghem , ,(2024-09-23), THEORETICAL FORMULA OF (N,3HE) REACTION CROSS SECTION AT 14,6 MEV,13th Conference on Nuclear and Particle Physics (NUPPAC' 24),Marsa Matrouh, Egypt

This work is devoted to calculating the thermophysical properties of Argon and helium gases such as diffusion, viscosity, and thermal conductivity in a thermal field between 1K and 10000K, by the Chapman-Enskog model. The calculations, essentially quantal, are based on interatomic potential constructed from new and recent potential data points.

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Samra Nehaoua , Fouzia Bouchelaghem , ,(2024-09-23), Thermophysical properties of helium and argon gas.,NUPPAC24,Egypt

Atomic collisions are fundamentally important in atomic physics and molecular. They are able to adequately describe the kinetics of gases and their hydrodynamic properties. They are thus important in the interpretation of some phenomena of astrophysics, quantum chemistry and laser physics and plasma.We are interested in this work at collisions purely elastic atom-atom type in a gas.

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Fouzia Bouchelaghem , ,(2024-06-26), THE SECOND VIRIAL COEFFICIENT OF Ar2,Computational and Applied Physics Symposium,Khemis-Miliana, Algeria

One of the physical means available to verify the quality and accuracy of the potential of inter-action is the evaluation of the second coefficients of viriel B2 (𝑇) and the analysis of their behaviour with temperature 𝑇. These coefficients depend, as will be seen below, directly from the interaction potential V(𝑅).

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Fouzia Bouchelaghem , Samra Nehaoua , Asma Ghezal , ,(2024-06-26), The second virial coefficient of Ar2,CAPS-2024,Khemis-Miliana, Algeria

GSview ! Il s'agit d'une interface graphique pour Ghostscript, une suite de logiciels qui interprète les fichiers PostScript et PDF. GSview permet aux utilisateurs de visualiser et d'interagir avec les fichiers PostScript (PS) et PDF de manière plus conviviale, en particulier lorsqu'il s'agit de fichiers générés à partir d'imprimantes ou de logiciels de conception. Il vous permet de zoomer, de naviguer et d'imprimer des documents directement depuis l'interface.

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Fouzia Bouchelaghem , ,(2024-06-13), Application d'un code GSview gnuplot pour dessiner des courbes,Journée de formation,جامعة محمد بوضياف المسيلة

In this work, the thermophysical properties of argon dilute gas are revisited, in the range of temperatures between 1K to 1000K, with new and recent potential data points. The built potential will then be introduced into the Schrödinger wave equation to be able to solve it numerically. The calculations of various transport parameters, namely diffusion, viscosity, and thermal conductivity, are extended to include the nuclear spins and the symmetry effects, which arise from the identity and indistinguishability of the colliding atoms.

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Fouzia Bouchelaghem , Chikouche Moncef, Chikouche Moncef, ,(2023), Transport properties of argon atoms diffusing in their parent gas.,the National Seminar of Physics, Chemistry, and Their Applications Webinar (NSPCA'23),Bordj Bou Arreridj

Transport properties of argon atoms diffusing in their parent gas.

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Samra Nehaoua , Fouzia Bouchelaghem , ,(2023), Transport properties of argon atoms diffusing in their parent gas.,National Seminar of Physics, Chemistry, and Their Applications Webinar (NSPCA'23),Bordj Bou arriridj

The transport coefficients, diffusion D(T), and reduced mobility K0 are calculated for systems 39K+ − 39K and 41K+ − 39K in a thermal range between 1 and 3000 K within the Chapman–Enskog approximation. This is preceded by a theoretical study of the collision of alkaline ions in their gases for low and intermediate energies in the range 10−14 ≤ E ≤ 10−3 (a.u.), and within this field, we calculate the interaction energy potentials and elastic and charge-transfer cross sections and discuss the isotopic effects in the 39 K+ − 39K and 41K+ − 39K collisions.

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Fouzia Bouchelaghem , Moncef Bouledroua, , (2023), Charge transfer cross sections and transport coefficients of 39K+ − 39K and 41K+ − 39K at low-energy, AIP Advances, Vol:13, Issue:2, pages:025159, AIP Publishing

Une particule subatomique est une composante de lamatière ayant une taille inférieure à celle d’un atome. On retrouve dans le noyau de l’atome deux types de particules: le proton et le neutron. Autour d'un oyau tournent les électrons.

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FouziaBouchelaghem , ,(2023); Cours & Exercices Physique Nucléaire L3/SM,MOHAMED BOUDIAF MSILA,

Les principaux objectifs de cette étude sont d'effectuer des calculs complets de mécanique quantique des sections efficaces de transport, basés sur les potentiels d'interaction ab initio des dimères ioniques de Lee [1] , qui se dissocient asymptotiquement en He+( 2S ) + He(1S), et d'examiner théoriquement les mobilités des ions He+ se déplaçant dans un gaz hélium en les comparant avec les données expérimentales et Théoriques. Afin d'obtenir les coefficients de transport appropriés, cette dernière tâche sera accomplie en injectant les sections efficaces quantiques dans le code Fortran GC.F [2], une version plus récente de l'ancien programme GRAMCHAR.F, tous les deux écrits par Viehland [3-4].

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Fouzia Bouchelaghem , LIAS SYHAM, ,(2023), Calcul des coefficients de transport des ions de Hélium dans un gaz parent par un traitement quantique des sections efficaces,Skikda, Algeria 1st International Conference on Physico-chemistry, Materials Sciences & Applied Mathematics,Skikda

This work deals theoretically with the mobility of alkali ions ( K+) moving in a K atoms. Assuming a very low electric field, the calculations are performed quantum mechanically within the Chapman-Enskog approximation [1]. The calculations start by constructing the ion-atom potentials in the short-range, intermediate, and long-range regions. The appropriate dispersion coefficients are adopted. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts needed in the computation of the collision integrals and the coefficients of diffusion and mobility. The variation law with temperature of both coefficients is examined.

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Fouzia Bouchelaghem , ,(2018), Transport properties of K+- K collision at low energy,École Thématique sur la Nano-Optique & Plasmonique : Modélisation, Caractérisation et Applications,Tizi-Ouzou

This work deals theoretically with the mobility of alkali ions ( Li+) moving in a Li atoms. Assuming a very low electric field, the calculations are performed quantum mechanically within the Chapman-Enskog approximation [1]. The calculations start by constructing the ion-atom potentials in the short-range, intermediate, and long-range regions. The appropriate dispersion coefficients are adopted. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts needed in the computation of the collision integrals and the coefficients of diffusion and mobility. The variation law with temperature of both coefficients is examined.

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Fouzia Bouchelaghem , ,(2018), Mobility of ionic lithium atoms diffusing in their parent gas,Le 15ème Congrès de la Division Plasma de la Société française de Physique,Bordeaux

This work deals with the quantum-mechanical calculation of the temperature-dependent mobility of ionic lithium atoms diffusing in their parent gas. The computation of the quantal phase shifts in connection with the gerade and ungerade potential-energy curves, through which Li(+) approaches Li(2s), leads to the computation of the charge-transfer and diffusion cross sections. The behavior of the coefficients of diffusion and mobility with temperature is also examined. Throughout this work, the isotopic effects in the (6)Li(+)-(6)Li and (7)Li(+)-(6)Li collisions are emphasized.

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Fouzia Bouchelaghem , Moncef. Bouledroua, , (2014-01-02), Quantum effects in the case of 6Li+and 7Li+ ions evolving in a neutral 6Li gas at a wide range of temperatures, Phys. Chem. Chem. Phys, Vol:16, Issue:5, pages:1875, Physical Chemistry Chemical Physics

This work deals with the quantum-mechanical calculation of the temperature-dependent mobility of ionic lithium atoms diffusing in their parent gas. The computation of the quantal phase shifts in connection with the gerade and ungerade potential–energy curves, through which Li+ approaches Li(2s), leads to the computation of the charge-transfer and diffusion cross sections. The behavior of the coefficients of diffusion and mobility with temperature is also examined. Throughout this work, the isotopic effects in the Li7+-Li7, Li6+-Li7 and collisions are emphasized.

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Fouzia Bouchelaghem , Moncef BOULEDROUA, , (2014), Isotopic effects in the Li+−Li collisions at lower and higher temperatures, Adv. Quantum Chem, Vol:68, Issue:12, pages:239, Advances in Quantum Chemistry

This work deals with the quantum-mechanical calculation of the temperature-dependent mobility of ionic lithium atoms diffusing in their parent gas. The computation of the quantal phase shifts in connection with the gerade and ungerade potential-energy curves, through which Li+ approaches Li(2s), leads to the computation of the charge-transfer and diffusion cross sections. The behavior of the coefficients of diffusion and mobility with temperature is also examined. Throughout this work, the isotopic effects in the 7Li+-7Li, 6Li+-7Li, 6Li+-6Li and 7Li+-6Li collisions are emphasized

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FouziaBouchelaghem , ,(2014); Mouvement des ions dans des gaz monoatomiques. Cas du lithium 6Li et 7Li,UNIVERSITE BADJI MOKHTAR ANNABA,

This work deals theoretically with the mobility of alkali ions ( K+ ) moving in a K atoms. Assuming a very low electric field, the calculations are performed quantum mechanically within the Chapman-Enskog approximation [1]. The calculations start by constructing the ion-atom potentials in the short-range, intermediate, and long-range regions. The appropriate dispersion coefficients are adopted. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts needed in the computation of the collision integrals and the coefficients of diffusion and mobility. The variation law with temperature of both coefficients is examined

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Fouzia Bouchelaghem , Bouledroua Moncef, ,(2013), Transport properties of ion-atom collision,Fourth International Meeting on Dielectric Materials,Marrakech, Morocco

This work deals theoretically with the charge exchange cross section computed for the system Li-Li+ assuming a very low electric field. The calculations are performed quantum mechanically within theChapman-Enskog model 1. The calculation starts by constructing the ion-atom potential and, with this system, the collisional dynamics are determined by the molecular Σg+ and Σu+ states 2. The gerade and ungerade potential-energy curves are shown in Fig. 1. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts. These phase shifts have been used to compute the elastic and charge-transfer cross sections. For illustration, the charge-transfer cross section for the scattering at low energies in the Σg+ and Σu+ states are presented in fig. 2.

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Fouzia Bouchelaghem , Bouledroua Moncef, ,(2011), Charge-transfer cross section in the Li+−Li system,Séminaire International sur la Physique des Plasmas,Ouargla, Algérie

This work deals theoretically with the mobility of alkali monatoms (Li+ , Na+ , K+ , Rb+ , Cs+ ) moving in a helium gas. Assuming a very low electric field, the calculations are performed quantum mechanically within the Chapman-Enskog approximation [1]. The calculations start by constructing the ion-atom potentials in the short-range, intermediate, and long-range regions. The appropriate dispersion coefficients are adopted. An example of the generated potential-energy curves is shown in Fig. 1 for the case of NaHe+ and RbHe+ systems. The curves are compared with other calculated potentials. The potentials are further used to solve the radial wave equation and therefore to determine the phase shifts needed in the computation of the collision integrals and the coefficients of diffusion and mobility. The variation law with temperature of both coefficients is examined and the results show that the diffusion coefficients vary like ~aTb . For illustration, the mobility coefficients of sodium and potassium ions diffusing in ground helium gas are presented in Fig 2. Particularly, the results of the reduced mobility, at given temperatures and pressures, can be compared with published values in case of very week electric field in the Table below.

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Fouzia Bouchelaghem , Bouledroua Moncef, ,(2008), Mobility of alkali-ions in a helium gas,19 europhysics Conference on the Atomic and Molecular Physics of ionized Gases,à Grenada Spain

In this work, the thermophysical properties of a helium dilute gas are revisited, in the range of low and high temperatures, with new and recent potential data points. The classical second virial coefficients are computed in order to assess the accuracy of the constructed He-He potential. The results, mainly at high temperatures, are in a good agreement with the published values. The isotopic effects due to the presence of 4He and 3He atoms are also examined and the calculations of various transport parameters, namely diffusion, viscosity, and thermal conductivity, are extended to include the nuclear spins and the symmetry effects, which arise from the identity and indistinguishability of the colliding atoms. iii

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FouziaBouchelaghem , ,(2006); Les propriétés thermophysiques d’un gaz monoatomique d’hélium,UNIVERSITE BADJI MOKHTAR ANNABA,

The thermophysical properties of a helium dilute gas at low and high temperatures are revisited with new and recent potential data points. The second virial coefficients are computed in order to assess the accuracy of the constructed He-He potentials. The results, mainly at high temperatures, are in a good agreement with the published values. The isotopic effects due to the presence of ^4He and ^3He atoms are also examined and the calculations of various transport parameters, namely diffusion, viscosity, and thermal conductivity, are extended to include the nuclear spins and the symmetry effects, which arise from the identity and indistinguishability of the colliding atoms.

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Fouzia Bouchelaghem , Bouledroua Moncef, ,(2006), Isotopic and Symmetry Effects in the Collision of Atomic Helium,59th Annual Meeting of the APS Division of Fluid Dynamics,American Physical Society