BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY. PHYSICS. ASTRONOMY SERIES https://bulphysast.enu.kz/index.php/physast <p><strong>Bulletin of the L.N. Gumilyov Eurasian National University.</strong> <strong>Physics. Astronomy </strong><strong>Series</strong></p> <p><strong>Certificate of registration of mass media:</strong> </p> <p>№ KZ66VPY00031918 dated 02.02.2021</p> <p><strong>ISSN </strong></p> <p>2616-6836</p> <p><strong>ISSN (онлайн) </strong></p> <p>2663-1296</p> <p><strong>DOI of the journal:</strong></p> <p>10.32523/2616-6836</p> <p><strong>Frequency</strong></p> <p>4 times a year.</p> <p><strong>Languages:</strong> </p> <p>Kazakh, English, Russian</p> <p><strong>Review:</strong> </p> <p>Double Blindness</p> <p><strong>Founder and publisher:</strong> </p> <p>NJC "L.N. Gumilyov Eurasian National University", Astana, Republic of Kazakhstan</p> <p>Publication of theoretical and experimental research materials in the field of physics and astronomy</p> <p><strong>Subject area: </strong></p> <p>Physics, Astronomy</p> <p>Registered by the Ministry of Information and Social Development of the Republic of Kazakhstan. Rediscount certificate № KZ66VPY00031918 dated 02.02.2021.</p> <p><strong>Open access policy. </strong></p> <p>Journal articles are directly accessible to all (link to article archive <a href="http://bulphysast.enu.kz/article/archive/index">http://bulphysast.enu.kz/article/archive/index</a>) based on the principle that open access to research results contributes to the advancement of universal knowledge.</p> <p><strong>Archiving. </strong></p> <p>Electronic versions of the scientific journal are provided to the National Center of State Science and Technology Evaluation JSC for the formation of the collection and inclusion in the electronic library. The journal has been archiving materials in Elibrary.ru since 2018.</p> <p><strong>Terms of publication. </strong></p> <p>All articles submitted to the Editorial Board of the journal "Bulletin of L.N. Gumilyov Eurasian National University. Physics. Astronomy Series" are subject to mandatory anonymous review. Based on the reviews received, the Editorial Board of the journal makes the final decision.</p> <p><strong>Subscription index</strong>. </p> <p>76093 (<a href="http://admin.bulphil.enu.kz/uploads/39/265fbab10a-prilozenie-3-2-katalog-ao-kazpocta-na-2020-goda.pdf">ENU Journals</a>)</p> <p>L.N. Gumilyov Eurasian National University and JSC "National Center of State Scientific and Technical Expertise" concluded an agreement № 44 dated 06.06.2021 for the inclusion of the journal in the Kazakhstan citation database. According to the agreement, <a href="https://bulphysast.enu.kz/uploads/39/4762b6d6c9-prilozenie-10.pdf">the impact factor of «Bulletin of L.N. Gumilyov Eurasian National University. Physics. Astronomy Series» will be calculated for 2020.</a></p> <p> </p> en-US Fri, 29 Mar 2024 00:00:00 +0000 OJS 3.3.0.9 http://blogs.law.harvard.edu/tech/rss 60 Comparative study of dose for different fluence of neutron https://bulphysast.enu.kz/index.php/physast/article/view/326 <p>The comparative study aims to investigate the dose received by materials exposed to different fluence of neutron radiation. The research is significant in the field of nuclear energy and radiation protection, as neutron radiation is one of the most common types of radiation produced by nuclear reactions. In this study, various materials are exposed to different fluence of neutron radiation, and the dose received by each material was measured using dosimeters. The results showed that the dose received by the materials increased with increasing fluence of neutron radiation. Furthermore, the study found that the dose-response relationship different between different materials, highlighting the importance of material selection in radiation protection. The study concludes that a better understanding of the dose-response relationship for different materials can help in the development of more effective radiation shielding materials and improve radiation safety in various applications.</p> Kassym Zhumadilov, Alima Amangeldina, Valerii Stepanenko, Masaharu Hoshi Copyright (c) 2024 BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY PHYSICS. ASTRONOMY SERIES https://bulphysast.enu.kz/index.php/physast/article/view/326 Fri, 29 Mar 2024 00:00:00 +0000 Mechanical properties of nickel nitrides under high pressures https://bulphysast.enu.kz/index.php/physast/article/view/323 <p>The mechanical properties of previously known nickel nitrides, Ni<sub>6</sub>N-<em>R-3</em>, Ni<sub>3</sub>N-<em>P</em>6<sub>3</sub>22, Ni<sub>3</sub>N-<em>Cmcm</em>, and Ni<sub>7</sub>N<sub>3</sub>-<em>Pbca</em>, were calculated from first principles using density functional theory at various pressures. Considered nickel nitrides are mechanically stable in the entire considered pressure ranges. It was shown that all phases are ductile and have low Vickers hardness values which are below the minimal criteria of hard materials, <em>H<sub>V</sub></em> &gt; 20 GPa. In addition, the fracture toughness was estimated.</p> Nursultan Sagatov, Dinara Sagatova Copyright (c) 2024 BULLETIN OF THE L.N. GUMILYOV EURASIAN NATIONAL UNIVERSITY PHYSICS. ASTRONOMY SERIES https://bulphysast.enu.kz/index.php/physast/article/view/323 Fri, 29 Mar 2024 00:00:00 +0000