Nuclear Analysis最新文献

{"title":"Evaluating the level of 226Ra, 232Th and 40K in different building materials","authors":"Aqeel A. Elewee ,&nbsp;Mohammed S. Alsaffar ,&nbsp;Shatha F. Alhous ,&nbsp;Murtadha Sh Aswood","doi":"10.1016/j.nucana.2025.100158","DOIUrl":"10.1016/j.nucana.2025.100158","url":null,"abstract":"<div><div>This study evaluates the levels of ²²⁶Ra, ²³²Th, and ⁴⁰K in various building materials, including brick, cement, sand, gravel, and gypsum, sourced from Al-Shatra in the Dhi-Qar Governorate of Iraq. Measurements were conducted using a NaI (Tl) detector, which is an effective tool for gamma-ray spectrometry. The average activity concentrations measured were 19.70 ± 6.7 Bqkg⁻¹ for ²²⁶Ra, 20.14 ± 3.3 Bqkg⁻¹ for ²³²Th, and 232.24 ± 91 Bqkg⁻¹ for ⁴⁰K. The calculated mean radium equivalent activity was found to be 66.63 Bqkg⁻¹, which is below the internationally accepted threshold of 370 Bqkg⁻¹. Both the internal hazard index (Hin) and the external hazard index (Hex) were determined to be less than unity (&lt;1), in accordance with the safe levels recognized by UNSCEAR. Additionally, the average values for the absorbed dose rate (nGyh⁻¹), indoor annual effective dose (mSvy⁻¹), outdoor annual effective dose (mSvy⁻¹), and gamma-ray exposure rate (μRh⁻¹) were estimated to be 59.09, 0.29, 0.07, and 138.83, respectively. These parameters are within acceptable limits when compared to the world-permitted values. Therefore, all types of building materials assessed in this study are considered safe and do not pose a significant threat to public health.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"4 1","pages":"Article 100158"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642492","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessment of radiation shielding properties for some concrete mixtures against photon and neutron radiations","authors":"Brahim EL Azzaoui ,&nbsp;Ouadie Kabach ,&nbsp;Younes EL Abbari ,&nbsp;Mohamed Youssef Messous ,&nbsp;Khalid Nabaoui ,&nbsp;Rabie Outayad ,&nbsp;Yassine EL Lkhadiri ,&nbsp;El mahjoub ChAKIR ,&nbsp;El Mehdi Alibrahmi","doi":"10.1016/j.nucana.2025.100152","DOIUrl":"10.1016/j.nucana.2025.100152","url":null,"abstract":"<div><div>This study evaluates fifteen concrete formulations, including standard and hybrid types such as Barite, Iron-Limonite, and Luminite-Colemanite-Barite, to determine their effectiveness in shielding against photon rays and neutrons. Using computational tools like MCNP, Phy-X, and XCOM, key shielding parameters were analyzed, including the Mass Attenuation Coefficient, Half-Value Layer, Mean Free Path, Fast Neutron Removal Cross Section, and Neutron Transmittance. In photon shielding, Iron-Portland concrete demonstrated superior performance, achieving the lowest Half-Value Layer (HVL) of 2.244 cm at 1.33 MeV, which is 42 % better than Ordinary concrete and 57 % better than Barite concrete. Iron-Limonite also showed strong photon attenuation with a Mean Free Path (MFP) of 3.23 cm at 1.33 MeV. For neutron shielding, Iron-Limonite and Ferro-phosphorus concrete recorded the highest Fast Neutron Removal Cross Section (FNRCS) values, reaching up to 0.146 cm⁻¹, indicating their strong capability to attenuate fast neutrons. Additionally, hybrid concretes like Luminite-Colemanite-Barite provided balanced protection against both photon and neutron radiation. This study highlights the effectiveness of high-density concretes in radiation shielding and underscores the alignment between deterministic and stochastic computational tools used, reinforcing their applicability in enhancing radiation safety.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"4 1","pages":"Article 100152"},"PeriodicalIF":0.0,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coulomb interaction dependence of optimal energy to synthesize superheavy elements","authors":"H.C. Manjunatha ,&nbsp;N. Sowmya ,&nbsp;K.N. Sridhar","doi":"10.1016/j.nucana.2024.100137","DOIUrl":"10.1016/j.nucana.2024.100137","url":null,"abstract":"<div><div>The production of superheavy elements beyond Z <span><math><mo>=</mo></math></span> 118 remains unattained through both cold and hot fusion techniques, primarily due to inadequate fusion reaction optimization involving projectile–target combinations and energy. Past efforts employed various theories to optimize these combinations. In our current study, we have successfully identified optimal fusion energies for synthesizing superheavy elements, employing an advance statistical model and dinuclear system models. The establishment of optimal energy governing rule is achieved through a comprehensive examination of the Coulomb interaction parameter, enabling precise determination of the optimal energy for successful fusion reactions in synthesizing superheavy elements. The confidence level of predicting optimal energies using the present formula varies between 97% to 99%. The predicted optimal energy using the present formula for five fusion reactions such as ²⁰⁸Pb(⁵⁰Ti,1n)²⁵⁷Rf, ²⁰⁸Pb(⁵⁰Ti,2n)²⁵⁶Rf, ²⁰⁹Bi(⁵⁰Ti,1n)²⁵⁸Db, ²⁰⁸Pb(⁵⁸Fe,1n)²⁶⁵Hs, and ²⁴⁴Pu(⁴⁸Ca,4n)²⁸⁸Fl were studied and are in good agreement with each other. Furthermore, we predicted the Optimal energies for fusion reactions leading to synthesize the superheavy element Z <span><math><mo>=</mo></math></span> 119 and 120. The presented empirical rule will certainly bring a revolution in the synthesis of superheavy elements.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100137"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142328252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Major and trace elements determination in organic and conventional Moroccan vegetables using the k0-standardisation method of neutron activation analysis","authors":"Sanaa Said ,&nbsp;Hamid Bounouira ,&nbsp;Hamid Amsil ,&nbsp;Ilias Aarab ,&nbsp;Abdelwahab Badague ,&nbsp;Soufya El Basraoui ,&nbsp;Ahmad Moussaif ,&nbsp;Bouchra Benazzouz","doi":"10.1016/j.nucana.2024.100127","DOIUrl":"10.1016/j.nucana.2024.100127","url":null,"abstract":"<div><p>The aim of the present work is the determination of different essential (minor and trace) elements found in five Moroccan vegetables collected from large commercial markets in Kenitra city, Morocco, and in some organic vegetables which were traditionally grown without the use of pesticides or chemical fertilizers, in a plot located in the rural commune of Dar Laaslouji, 48 km from Kenitra city. The k0-standardisation method of the Neutron Activation Analysis (k0-INAA) using the TRIGA Mark II research reactor of 2 MW at the National Centre for Nuclear Energy, Science and Technology (CNESTEN) and gamma-ray spectroscopy facility were employed. For quality control, the accuracy of measurements has been investigated using certified reference materials (IAEA-336 lichens, and NIST SRM 1547 peach leaves) which were analyzed simultaneously with the samples. Good agreement was found between certified and determined values. The primary results are presented and discussed for the concentration of minor and trace elements in some vegetables (tomatoes, carrots, green peppers, cilantro and mint), that are widely used in Moroccan meals.</p></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100127"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773183924000272/pdfft?md5=b1d34d7429818ab97b003d1bac920b82&pid=1-s2.0-S2773183924000272-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142058495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correlation between microscopic degradation mechanism and macroscopic mechanical property of epoxy resin based on low molecular weight radiolysis products","authors":"Lei Yu ,&nbsp;Shuai Chen ,&nbsp;Jianming Zhou ,&nbsp;Shuai Liu ,&nbsp;Bo Liu ,&nbsp;Jing Peng ,&nbsp;Shuo Hou ,&nbsp;Yinyong Ao","doi":"10.1016/j.nucana.2024.100143","DOIUrl":"10.1016/j.nucana.2024.100143","url":null,"abstract":"<div><div>Low molecular weight radiolysis products play an important role in the performance change and degradation mechanism of polymer materials. In this study, the radiolysis products with low molecular weight of epoxy resin were detected, identified and quantified through solid phase microextraction combined with gas chromatography-mass spectrometry (SPME-GC-MS). The qualitative results showed that most of radiolysis products of epoxy resin were phenols and ketones. The result of principal component analysis showed that the composition of radiolysis products produced at different absorbed doses had obvious difference, indicating that the degradation degree of epoxy resin was different at different absorbed dose. Phenol can be used as an indicator product to reflect the change of tensile strengrh. It indicated that the identification of the radiolysis products was useful for studying the degradation mechanisms and predicting the degradation degree of epoxy resin. Accordingly, the radiation-induced degradation mechanisms were proposed according to the radiolysis products and theoretical calculations.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100143"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Gold nanoparticle effect on dose and DNA damage enhancement in the vicinity of gold nanoparticles","authors":"Adil Bardane ,&nbsp;Nabil Maalej ,&nbsp;El Mahjoub Chakir ,&nbsp;El Mehdi Al Ibrahmi","doi":"10.1016/j.nucana.2024.100126","DOIUrl":"10.1016/j.nucana.2024.100126","url":null,"abstract":"<div><p>This study uses Monte Carlo simulations to examine the dose enhancement effect of gold nanoparticles (AuNPs) in radiation therapy and its effects on DNA damage. Using the GATE- 9.0 and Geant4-DNA packages, Monte Carlo simulations were used to simulate a mathematical phantom and determine the energy deposition in the vicinity of AuNP. The simulations were conducted for various photon beam energies (50, 100, 250, and 6000 keV) with and without the presence of different-size AuNPs (10, 30, 50 and 100 nm). The dose enhancement factor (DER) was evaluated using Geant4-DNA to examine the effects AuNP sizes and photon beam energies on DNA damage. A multi-scale Monte Carlo simulation was conducted to evaluate enhanced DNA damage owing to nanoparticles in the proximity of cancer cells. The Monte Carlo simulations indicated that AuNPs boost the dose delivery, resulting in enhanced energy deposition and subsequent DNA damage. The DER analysis revealed a significant increase in the dose deposition within DNA, leading to single or double-strand breaks. Geant4-DNA simulations revealed information on the dosage enhancement factor for various AuNP sizes and photon beam intensities, enabling a deeper comprehension of the underlying mechanics. The outcomes of this study emphasize the potential of AuNPs as effective radiosensitizers in radiation therapy and contribute to the growing body of research on the use of nanotechnology in enhancing cancer treatment outcomes. Further investigations and experimental validations are necessary to optimize the usage of AuNPs for improved radiation therapy.</p></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100126"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773183924000260/pdfft?md5=28fbf1d35df9f3b5d4b49c66adb0a166&pid=1-s2.0-S2773183924000260-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142011368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fusion mechanism involved in the synthesis of superheavy element Z>118 using Mn projectiles","authors":"H.S. Anushree ,&nbsp;N. Sowmya ,&nbsp;H.C Manjunatha ,&nbsp;S. Shubha","doi":"10.1016/j.nucana.2024.100124","DOIUrl":"10.1016/j.nucana.2024.100124","url":null,"abstract":"&lt;div&gt;&lt;div&gt;We conducted an in-depth investigation of Mn-induced fusion reactions aimed at synthesizing superheavy elements with atomic numbers Z=119 to Z=123. Our analysis considers the total potential, which combines Coulomb and nuclear potentials. The nuclear potential was calculated using the Thomas–Fermi approach, a valuable method for modeling the behavior of nucleons in atomic nuclei. within the framework of advanced statistical model, the evaporation residue cross-sections were determined. At optimal energies, we have calculated capture, fusion, and evaporation residue cross-sections for the reactions of all the projectile–target combinations. All &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;53&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Mn isotopes with larger half-lives were taken into consideration as projectiles. Fusion reactions between &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;53&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Mn projectiles with &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;238&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;242&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;244&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Pu, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;241&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;243&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Am, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;242&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;248&lt;/mn&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mn&gt;250&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Cm, &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;247&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;249&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Bk, and &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;248&lt;/mn&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mn&gt;254&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt;Cf. Detailed investigations were made and promising reactions viz. &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;241&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Pu&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Mn&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, 3n)&lt;sup&gt;293&lt;/sup&gt;119, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;242&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Am&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Mn&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, 3n)&lt;sup&gt;294&lt;/sup&gt;120, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;247&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Cm&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Mn&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, 3n)&lt;sup&gt;299&lt;/sup&gt;121, &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;248&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Bk&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;55&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Mn&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, 3n)&lt;sup&gt;300&lt;/sup&gt;122 and &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;251&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Cf&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; (&lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;msup&gt;&lt;mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;53&lt;/mn&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;mi&gt;Mn&lt;/mi&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, 3n)&lt;sup&gt;301&lt;/sup&gt;123 with maximum &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;σ&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;E&lt;/mi&gt;&lt;mi&gt;R&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; are found to be 415.1 fb at 240 MeV, 115.4 fb at 244 MeV, 36.5 fb at 245 MeV, 13.6 fb at 249 MeV, 5.4 fb at 250 MeV for Z=119-123 respectively. Th","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100124"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142327640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Compound nucleus formation probability of heavy and superheavy nuclei synthesized using heavy ion fusion reactions","authors":"Reddi Rani L. ,&nbsp;N. Sowmya ,&nbsp;H.C. Manjunatha ,&nbsp;M.M. Armstrong Arasu","doi":"10.1016/j.nucana.2024.100123","DOIUrl":"10.1016/j.nucana.2024.100123","url":null,"abstract":"<div><div>The role of entrance channel parameters such as <span><math><mrow><msup><mrow><mi>Z</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mi>A</mi></mrow></math></span>, charge asymmetry <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>z</mi></mrow></msub></math></span>, mass-asymmetry (<span><math><msub><mrow><mi>η</mi></mrow><mrow><mi>A</mi></mrow></msub></math></span>), charge product (<span><math><mrow><msub><mrow><mi>Z</mi></mrow><mrow><mn>1</mn></mrow></msub><msub><mrow><mi>Z</mi></mrow><mrow><mn>2</mn></mrow></msub></mrow></math></span>), mean fissility <span><math><msub><mrow><mi>χ</mi></mrow><mrow><mi>m</mi></mrow></msub></math></span>, Coulomb interaction parameter and <span><math><mrow><mrow><mo>(</mo><mi>N</mi><mo>−</mo><mi>Z</mi><mo>)</mo></mrow><mo>/</mo><mrow><mo>(</mo><mi>N</mi><mo>+</mo><mi>Z</mi><mo>)</mo></mrow></mrow></math></span> on compound nucleus formation of actinide nuclei using heavy ion fusion reactions were investigated. For the formation of compound nuclei, the considered atomic number range of the projectile varies between <span><math><mrow><mn>5</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>14</mn></mrow></math></span> and the mass number lies between <span><math><mrow><mn>10</mn><mo>≤</mo><mi>A</mi><mo>≤</mo><mn>34</mn></mrow></math></span>. Similarly, the studied target atomic number varies between <span><math><mrow><mn>78</mn><mo>≤</mo><mi>Z</mi><mo>≤</mo><mn>92</mn></mrow></math></span> and the mass number range is <span><math><mrow><mn>197</mn><mo>≤</mo><mi>A</mi><mo>≤</mo><mn>238</mn></mrow></math></span>. Among these entrance channel parameters, <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>C</mi><mi>N</mi></mrow></msub></math></span> is more systematic for <span><math><mfrac><mrow><mrow><mo>(</mo><mi>N</mi><mo>−</mo><mi>Z</mi><mo>)</mo></mrow></mrow><mrow><mrow><mo>(</mo><mi>N</mi><mo>+</mo><mi>Z</mi><mo>)</mo></mrow></mrow></mfrac></math></span>, <span><math><mrow><msup><mrow><mi>Z</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>/</mo><mi>A</mi></mrow></math></span> and <span><math><msub><mrow><mi>α</mi></mrow><mrow><mi>z</mi></mrow></msub></math></span>. In addition to entrance channel parameters, the <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>c</mi><mi>m</mi></mrow></msub></math></span> and <span><math><msub><mrow><mi>E</mi></mrow><mrow><mi>B</mi><mi>a</mi><mi>s</mi><mi>s</mi></mrow></msub></math></span> also play a significant role in the prediction of <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>C</mi><mi>N</mi></mrow></msub></math></span>. The proposed empirical formulae are applicable to the compound nuclei from Fr to Sg. These findings are significant for the <span><math><msub><mrow><mi>P</mi></mrow><mrow><mi>C</mi><mi>N</mi></mrow></msub></math></span> prediction from Fr to Sg.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100123"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142358342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comparative analysis of the NaI detector response function using GAMOS and FLUKA Monte Carlo simulations","authors":"A. Arectout ,&nbsp;H. Boukhal ,&nbsp;E. Chakir ,&nbsp;M. Jarmouni ,&nbsp;M. Assalmi ,&nbsp;T. El Ghalbzouri ,&nbsp;O.E. Belhaj ,&nbsp;Mohamed Drissi El-Bouzaidi ,&nbsp;A. Nouayti ,&nbsp;I. Zidouh ,&nbsp;H. El Yaakoubi","doi":"10.1016/j.nucana.2024.100138","DOIUrl":"10.1016/j.nucana.2024.100138","url":null,"abstract":"<div><div>This work aims to study the response function of a 2″×2″ NaI(Tl) scintillation detector using Monte Carlo simulations. A precise mathematical model of the NaI(Tl) scintillator was developed using both FLUKA and GAMOS Monte Carlo simulation software. The photon pulse height distributions of the NaI(Tl) without influence of its energy resolution, obtained with FLUKA and GAMOS codes, were converted into a real NaI(Tl) response function using the necessary conversion process. Spectral characteristics such as full-energy peak efficiency, energy resolution, peak-to-Compton ratio, and peak-to-total ratio were investigated by simulation at different gamma-ray energy obtained from ¹⁰⁹Cd, ¹³⁷Cs, ⁵⁴Mn, ⁶⁵Zn, and ⁶⁰Co sources. The simulated spectra from the GAMOS code were consistent with those generated by the FLUKA code. Additionally, the comparison between simulated results and experimental data demonstrated good agreement. The validation of the computational models used for the NaI(Tl) detector in both FLUKA and GAMOS software was successfully achieved, confirming the accuracy of the simulations in replicating the detector's response.</div></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 4","pages":"Article 100138"},"PeriodicalIF":0.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142323148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility of producing 225Ac via thermal neutron irradiation of 226Ra: A systematic theoretical study","authors":"Long Qiu ,&nbsp;Jinsong Zhang ,&nbsp;Tu Lan ,&nbsp;Jiali Liao ,&nbsp;Yuanyou Yang ,&nbsp;Feize Li ,&nbsp;Ning Liu","doi":"10.1016/j.nucana.2024.100122","DOIUrl":"10.1016/j.nucana.2024.100122","url":null,"abstract":"<div><p>With a suitable half-life and abundant radiolabeling strategy, ²²⁵Ac has become one of the most promising radionuclides in the area of targeted alpha therapy. However, limited radionuclide supply is threatening the development of ²²⁵Ac related endoradiotherapy dramatically. As the parent nuclide of ²²⁵Ac, ²²⁹Th can be produced via ²²⁶Ra(3n, 2β)²²⁹Th reaction in a nuclear reactor. However, related practice has not been conducted in large scale, since the nuclear reaction pathway for producing ²²⁹Th is complicated. In this work, the feasibility of producing ²²⁵Ac/²²⁹Th in a reactor was confirmed by systematic theoretical calculations, and a procedure that combines irradiation with separation process was proposed. The results show that 176 MBq of ²²⁹Th can be produced by irradiating 1.0 g of ²²⁶Ra with a neutron flux density of 1 × 10¹⁵ n cm⁻² s⁻¹ for 90 days. This will generate 150 MBq of ²²⁵Ac monthly from a radionuclide generator, which is sufficient for the single treatment cycle of 200 patients each year considering the radioactivity loss in radiochemical separation, transfer and radiolabeling process. In addition, this irradiation process will also produce 37.8 GBq ²²⁷Ac for the preparation of ²²⁷Ac-²²⁷Th-²²³Ra generator. In general, the production of ²²⁵Ac by neutron irradiation of ²²⁶Ra in reactor is practicable and holds potential to alleviate the shortage of current supply of ²²⁵Ac.</p></div>","PeriodicalId":100965,"journal":{"name":"Nuclear Analysis","volume":"3 3","pages":"Article 100122"},"PeriodicalIF":0.0,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2773183924000223/pdfft?md5=459ab0fb9ccb924e8ab5a6fed4199880&pid=1-s2.0-S2773183924000223-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141839148","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}