SAMRA Nehaoua

Mokrane Souhila

Simulation Monte Carlo de l'imagerie médicale et radiothérapie en utilisant plateforme GATE

Naimi Yaakoub

Etude systématique de la réaction nucléaire (n,3He) et calcul des fonctions d’excitation avec le code EMPIRE

Ilyas Farhat

Systematic study of (n,³He) nuclear reaction and calculation of excitation functions with TALYS code

Darbal, Kherfia

Formule semi-empirique des fonctions d’excitation de la réaction (n,3He) à 14,6 MeV

مكاري ريمة , مكفس سهيلة

SEDD المقطع الفعال التفاضلي المضاعف للتأين البسيط لذرة الهل

NAIDJI Saloua

Évaluation empirique des sections efficaces de la réaction (n, 3He)

Bennacer Hadjer

Calcul de section efficace triplement différentielle de la simple ionisation de l`Hélium par un électron -Fonction de Clémenti,

Sara_SOUYAH

Calcul de la section efficace triplement différentielle du Neon par un électron

Zerouak Ahlem

Calcul des coefficients de Clebsch Gordan pour un SU(2) et SU(3) par une méthode non récursive

Hasni Sihem

Calcul de la section efficace doublement différentielle du H2O

,Daouad Amina

Calcul de la section efficace triplement différentielle de l’hélium

Kawther Belhadj

Calcul des orbitales moléculaire du dioxyde du carbone CO2, étude comparative avec la technique EMS.

Abstract This work focuses to develop semi-empirical formulae for calculating (n, t) nuclear reaction induced by fast neutron at energy of 14-15 MeV. The emission of triton is a weak nuclear reaction, it is presented by an excitation function of micro barns, and we use pre-compound mechanism based on exciton model to describe it. Three fitting parameters at the formulae are proposed where the even-odd contribution is taken into consideration, 31 nuclei are investigated with mass number A . Compared to previous studies, low values of and are obtained, achieving 0.91 and 16.53 respectively, for even A nuclei, 1.57 and 10.98 respectively, for odd A nuclei. These formulae reproach more calculated cross sections from experiment data and predict the unmeasured ones. This work improves that, in addition to the equilibrium model, the pre-equilibrium model is useful in weak nuclear reaction description.

Citation

Samra Nehaoua , , (2026-01-03), Semi-Empirical Formulae for Triton Emission at 14-15 MeV Neutrons, Journal of Fusion Energy, Vol:45, Issue:1, pages:4, Springer US

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

Citation

Asma Ghezal , Samra Nehaoua , ,(2025-06-25), Novel systematic for (n,d) reaction cross section at 14‐15 MeV,17th International Conference on Nuclear Structure Properties (NSP2025),,Turkey

A new semi-empirical formula has been developed to calculate the (n, 3 He) reaction cross-section at a neutron energy of 14.6 MeV, with the aim of improving prediction accuracy by incorporating the Q-value and asymmetry parameters. The formula is based on the exciton model, which describes the pre-equilibrium reaction mechanism. Experimental data from the literature were used to validate the formula and optimize its free parameters. The results show that the proposed formula provides a better fit to experimental data compared to previous models, especially at incident energies above 15 MeV. The model has also been extended to cover a wider energy range and validated using additional experimental data. Keywords — (n,t) function excitaion;; fusion reaction; 3

Citation

Samra Nehaoua , Asma Ghezal , Nouri BENAIDJA , ,(2025-06-25), Improved semi-empirical formula for (n, 3 He) reaction cross section at 14.6 MeV,17th International Conference on Nuclear Structure Properties (NSP2025),,Turkey

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

The new formula enhances the accuracy of (n, t) reaction cross-section predictions at 14.6 MeV, offering a reliable tool for theoretical and applied nuclear physics. Future work will focus on extending the model to a broader energy range and validating it with additional experimental datasets.

Citation

Samra Nehaoua , Asma Ghezal , Nouri BENAIDJA , ,(2025-04-13), Novel semi empirical systematic for (n,t) cross section at 14,6 MeV,4th International Conference on Radiations And Applications ICRAA4,Algeria

Background/Purpose: A semi empirical formula for (n,d) nuclear reaction cross section is proposed. The systematic was derived using analytical expressions for the calculation of the deuterium emission spectrum in (n,d) nuclear reactions. The pre-equilibrium exciton model and the evaporation model are used to describe the deuterium emission. The experimental data are used to adjust free parameters in systematic formula at 14-15 MeV. The systematics gives closer results to experimental data compared with formulas earlier studies. Materials & Methods: The pre-equilibrium exciton model and the evaporation model are used to describe the deuterium emission; previous studies have ignored pre equilibrium mechanism. Results: The proposed semi empirical systematic describe better (n,d) function excitation and gives least values of statistical parameters which proof the quality of our formula. [1,2]. Conclusion: The systematics gives closer results to experimental data compared with formulas earlier studies. The proposed semi empirical systematic describe better (n,d) function excitation and gives least values of statistical parameters which proof the quality of our formula.

Citation

Samra Nehaoua , Asma Ghezal , Nouri BENAIDJA , ,(2025-04-13), Semi empirical formula for (n,d) reaction cross section at 14-15 MeV,4th International Conference on Radiations And Applications ICRAA4,Algeria

Background/Purpose: A theoretical semi-empirical formula is derived for calculating the (n, t) nuclear cross-section at 14.6 MeV neutron energy. This study aims to improve the prediction accuracy of cross-sections by incorporating Q-value dependence and asymmetry parameters, building on the pre-compound mechanism with the exciton model. Materials & Methods: The proposed formula is derived using theoretical models that describe the pre-compound reaction mechanism. The Q dependence and asymmetry parameters were key inputs in refining the formula. Experimental data from the literature were utilized to validate and optimize the free parameters of the formula [1-3]. Results: The suggested formula provides a better fit to experimental data compared to previously established models. It accurately predicts the excitation function for energies greater than 15 MeV, showing consistency with observed trends and improving upon the limitations of earlier approaches. Conclusion: The new formula enhances the accuracy of (n, t) reaction cross-section predictions at 14.6 MeV, offering a reliable tool for theoretical and applied nuclear physics. Future work will focus on extending the model to a broader energy range and validating it with additional experimental datasets.

Citation

Samra Nehaoua , Asma Ghezal , ,(2025-04-13), thermophysical properties of heliumand argon gaz,4th International Conference on Radiations And Applications ICRAA4,Algeria

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.

Citation

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

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.

Citation

Samra Nehaoua , ,(2024-12-16), New semi empirical formula o(n,t) cross section,ICRAMPCS2024,Algérie

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.

Citation

Asma Ghezal , Samra Nehaoua , ,(2024-11-23), NEW SEMI EMPIRICAL SYSTEMATIC OF (N, T) REACTION CROSS SECTION,NUPPAC'24,Egypt

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.

Citation

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 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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Samra Nehaoua , Asma Ghezal , fouzia bouchelaghem <fouzia.bouchelaghem@univ-msila.dz>, S. Lias/University of Science and Technology Houari Boumediene BP 32 Bab Ezzouar, 16111. Algeria, ,(2024-09-24), Isotopic effects in the He+ - He collision at lower energies,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.

Citation

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

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

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

A new semi-empirical formula for the calculation of (n, 3 He) reaction cross section at an energy of 14.6 MeV is suggested, It contains four free parameters to fit few experimental data, we propose additional parameter to formula proposed by Broeders and Konobeyev (2007) that increase the contribution of pre-equilibrium 3 He particle emission. The exciton model in closed form and coalescence model are used to describe the pre-equilibrium 3 He particle emission in reaction induced by neutron. Compared to earlier works the proposed systematics is more close to experimental data and performs statistical parameters Σ and χ 2.

Citation

Samra Nehaoua , , (2020), Semi-empirical systematic of (n, 3He) reaction cross section at 14, 6 MeV, Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol:484, Issue:4, pages:71-74, North-Holland

Ce polycopié de cours de physique statistique destiné aux étudiants de troisième année de physique théorique étudie les systèmes à l’équilibre thermodynamique qui gardant ses grandeurs macroscopiques constantes. On introduit ce manuscrit par un rappel en probabilités et statistiques, ainsi un rappel de thermodynamique. Ce manuscrit se subdivise principalement en cinq chapitres, le premier chapitre définit les systèmes à l’équilibre et ses macro-états et micro-états possibles, les trois chapitres restants sont portés sur les différents ensembles : microcanonique, canonique et grand-canonique, dans le cinquième quatrième chapitre on présente une introduction en statistique quantique, des exercices sont proposés à la fin des chapitres.

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SamraNehaoua , ,(2020); physique statistique,Mohamed Boudiaf University,

Neutronic parameters calculations using MCNP code

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Samra Nehaoua , ,(2018), Neutronic parameters calculations using MCNP code,1 St Meeting on Monte Carlo Simulations in Radiation Physics- October, (MMSRP_2018) 31 st 2018.,SETIF

L’étude de l’ionisation simple par impact électronique de quelques cibles atomiques et moléculaires a été effectuée à l’aide de l’approximation de Born au premier ordre. Dans ce cadre, l’électron incident (puis diffusé) est décrit par une onde plane alors que l’électron éjecté sera successivement décrit par une onde coulombienne, puis par une onde distordue. Dans une première partie le calcul des sections efficaces différentielles et totales a été réalisé en prenant un état final orthogonalisé à l’état initial de la cible. Un accord globalement satisfaisant a été trouvé avec les mesures expérimentales réalisées sur le néon, l’eau, le méthane et l’ammoniac pour les sections efficaces totales. Dans une deuxième partie la distorsion de la trajectoire de l’électron éjecté a été prise en compte dans le calcul des sections efficaces différentielles. Un meilleur accord est trouvé dans le cas de l’ionisation de couches internes de gaz rares (argon par exemple) pour la localisation du pic binaire mais des désaccords subsistent pour la description du pic de recul.

Citation

SamraNehaoua , ,(2016); IONISATION D’ATOMES ET DE MOLECULES PAR IMPACT D’ELECTRONS : CONTRIBUTION DE L’ORTHOGONALISATION ET DES EFFETS DE DISTORSION,Ferhat Abbas university,

Total ionization cross sections by electron impact are calculated for H2O, NH3 and CH4 molecules by using an improved first Born approximation which has been previously applied for atomic targets by Bartlett and Stelbovics [P.L. Bartlett, A.T. Stelbovics, Phys. Rev. A 66, 012707 (2002)]. In this model a full orthogonalization of the final state to the initial state has been performed to evaluate the cross sections. One center wave functions are employed to describe the molecular orbitals. It is shown that the results obtained in the present model are immensely improved when compared with the first Born model without orthogonalization. Furthermore, an overall agreement is also observed when a comparison is made with the experimental data.

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Samra Nehaoua , Salim Houamer, Claude Dal Cappello, Mehdi Chinoune, Alexander Galstyan, Amulya Chandra Roy, , (2015-03-24), Effect of orthogonalization on total ionization cross sections by electron impact: application to small molecules, The European Physical Journal d, Vol:46, Issue:86, pages:3, Springer Science+Business Media, EDP Sciences, Società Italiana di Fisica

The single ionization of molecules by charged particles remains up to now a difficult problem when we want to treat it by an ab-initio quantum model. The difficulty is due to the multicenter character of the target wave function. One way to avoid this difficulty is to use a single center wave function for the initial (or excited) state of the molecule.

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Samra Nehaoua , ,(2013), Ionization of thymine by electron impact,11th european conference on atoms, molecules and photons (ecamp11) june 2013.,France

Partitioning and transmutation of 99Tc in fission reactors and hybrids systems

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Samra Nehaoua , ,(2005), Partitioning and transmutation of 99Tc in fission reactors and hybrids systems,Proceedings of the Fifth Nuclear and Particle Physics (NUPPAC) 2005.,Egypte