Seriya 3: Fizika, Astronomiya最新文献_第4页

The laser-electron source of X-ray radiation (from the opening statement at workshop dedicated to the 85th anniversary of B.S. Ishkhanov in SINP MSU on October 26, 2023) X 射线辐射的激光电子源（摘自 2023 年 10 月 26 日在莫斯科国立自治大学 SINP 纪念 B.S. 伊什哈诺夫诞辰 85 周年研讨会上的开幕词）

Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420205

I. Artyukov, A. Vinogradov, V. Shvedunov

{"title":"The laser-electron source of X-ray radiation (from the opening statement at workshop dedicated to the 85th anniversary of B.S. Ishkhanov in SINP MSU on October 26, 2023)","authors":"I. Artyukov, A. Vinogradov, V. Shvedunov","doi":"10.55959/msu0579-9392.79.2420205","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2420205","url":null,"abstract":"The work, as well as the seminar at which it was reported, is devoted to the memory of the outstanding\u0000physicist-nuclear scientist, professor of Moscow State University B.S. Ishkhanov, namely his contribution\u0000to the research and development of LEXG — laser-electronic X-ray generators. Relevance and prospects of\u0000this direction are connected with «gap» between two existing types of X-ray sources: on the one hand —\u0000X-ray tubes, and on the other - electronic accelerators, storage rings and free electrons lasers. It’s about a\u0000huge difference in their bundle characteristics, cost, scale, energy consumption, etc. The history of modern\u0000projects abroad, as well as the LEXG project of MSU–Jilin University, led by Prof. B.S. Ishkhanov, are briefly\u0000presented. From the point of view of their applications, the LEXG designs can be divided into two types with\u0000different scale of the devices. The first is the replacement of serial X-ray tubes and the second is radiation\u0000medicine, nuclear technology and nuclear physics research. International conferences on LEXG have been held\u0000since 2008. The list of these is given in the Annex to the article.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"6 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141018184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The storage ring of the Compton source of the NCPM 国家粒子监测中心康普顿源的存储环

Seriya 3: Fizika, Astronomiya Pub Date : 2024-05-02 DOI: 10.55959/msu0579-9392.79.2420207

D.A. Bobylev, V. Shvedunov

引用次数: 0

On activation studies of photonuclear reactions on γ-beamsfrom backward Compton scattering at E ≤ 40 MeV 关于 E ≤ 40 MeV 后向康普顿散射γ光束上光核反应的活化研究

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410201

S. Belyshev, V. V. Varlamov, L. Z. Dzhilavyan, A. A. Kuznetsov, A. Lapik, A. Polonski, A. V. Rusakov, V. I. Shvedunov

引用次数: 0

NEW INFRARED CAMERA OF THE CAUCASIAN MOUNTAIN OBSERVATORY OF THE SAI MSU: DESIGN, MAIN PARAMETERS AND RST LIGHT 西印度洋海洋研究所高加索山观测站的新型红外摄像机：设计、主要参数和首次光照

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410801

S. Zheltoukhov, A. Tatarnikov, A. A. Belyakova, E. A. Koksharova

{"title":"NEW INFRARED CAMERA OF THE CAUCASIAN MOUNTAIN OBSERVATORY OF THE SAI MSU: DESIGN, MAIN PARAMETERS AND RST LIGHT","authors":"S. Zheltoukhov, A. Tatarnikov, A. A. Belyakova, E. A. Koksharova","doi":"10.55959/msu0579-9392.79.2410801","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2410801","url":null,"abstract":"The paper presents a prototype of an infrared photometer, made by the SAI of MSU on the base of a commercial infrared module Gavin-615A. The operating spectral range of the photometer is 3-5 µm. Studies of the photometer detector have shown that its parameters correspond to those declared by the manufacturer. Nonlinearity of the detector does not exceed ∼ 5% in the whole range of signals, coe cients of correction--function were determined. Additionally, we determined the readout noise RN = 1200 ± 210 e, conversioncoe cient GAIN = 520 ± 9 e/ADU, the BIAS = 960.5 ± 2.2 ADU, and dark current ≈ (9.3 ± 1.1) · 106-e /s,which consists of the sum of the detector dark current and radiation of the entrance window of the detector◦module. The value of dark current was measured at the window temperature of 6 C. Observations werestarted with the photometer at the 2.5-m telescope of the Causasian Mountain Observatory of MSU, the rst results are given in the paper. The unvignetted eld of view is 30'' . In the M band under good atmosphericconditions, an image quality is close to di raction limit. Images of a star with magnitude L = 7.96 and M = 6.78 were obtained with exposure of 20 seconds and a SNR∼10 ratio. It is shown that at high image quality with SNR=3 and exposure of 20 seconds it is possible to observe stars up to L ∼9m and M ∼8m . The main module of the photometer was also used for measurements of the sky background brightness.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"25 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264919","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomalous band bending in the (K 0.8 Na 0.2) 0.8 Fe 1.8 Se 2 superconductor (K 0.8 Na 0.2) 0.8 Fe 1.8 Se 2 超导体中的反常带弯曲

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410502

L.L. Lev, T. Kuzmicheva, S. Kuzmichev, A. M. Lebedev, V. Nazin, R. G. Chumakov, A. Shilov, E.O. Rahmanov, I. V. Morozov

{"title":"Anomalous band bending in the (K 0.8 Na 0.2) 0.8 Fe 1.8 Se 2 superconductor","authors":"L.L. Lev, T. Kuzmicheva, S. Kuzmichev, A. M. Lebedev, V. Nazin, R. G. Chumakov, A. Shilov, E.O. Rahmanov, I. V. Morozov","doi":"10.55959/msu0579-9392.79.2410502","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2410502","url":null,"abstract":"Iron dichalcogenides intercalated with alkali metal atoms attract the attention of physicists due to their\u0000unusual natural phase separation, in which superconducting clusters are formed at the boundaries of the\u0000antiferromagnetic phase. In this work, using photoelectron spectroscopy, we discovered an unusual effect that\u0000presumably arises due to this phase separation. We studied the temperature dependences of the photoelectron\u0000spectra of Se 3d, Fe 3p and the valence band at temperatures above and below Tc ≈ 27 K of the compound\u0000(K0.8Na0.2)0.8Fe1.8Se2 with a unique substitution of alkali metal atoms. A strong temperature dependence of\u0000both the valence band and core levels was discovered: we observed a strong broadening of the spectra, which\u0000monotonically decreased with increasing sample temperature, while the temperature changes were cyclic. We\u0000believe that this broadening is associated with the appearance of space charges in the dielectric matrix, which\u0000leads to band bending. Moreover, the shape of the potential arising under the surface of a given compound\u0000was reconstructed, and an estimate was obtained for the relative amount of the superconducting phase. The\u0000results obtained will help to better understand the physical processes occurring in this compound.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"129 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140078975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

DETERMINING THE PRESENCE OF PACKING DEFECTS IN PALLADIUM-BASED ALLOYS BY X-RAY DIFFRACTION METHOD 用 X 射线衍射法测定钯基合金中是否存在填料缺陷

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410504

O. V. Akimova

引用次数: 0

THERMOREGULATION SYSTEM FOR BIOSENSORS BASED ON FIELD-EFFECT TRANSISTORS WITH A NANOWIRE CHANNEL 基于具有纳米线通道的场效应晶体管的生物传感器温度调节系统

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410701

G. Nibudin, I. Tsiniaikin, G. Presnova, M. Rubtsova, A. Popov, P. Mikhailov, A. Trifonov, O. Snigirev, V. Krupenin, D. Presnov

{"title":"THERMOREGULATION SYSTEM FOR BIOSENSORS BASED ON FIELD-EFFECT TRANSISTORS WITH A NANOWIRE CHANNEL","authors":"G. Nibudin, I. Tsiniaikin, G. Presnova, M. Rubtsova, A. Popov, P. Mikhailov, A. Trifonov, O. Snigirev, V. Krupenin, D. Presnov","doi":"10.55959/msu0579-9392.79.2410701","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2410701","url":null,"abstract":"In this work we present an automatic thermoregulation system for biosensors based on field-effect transistors with a nanowire channel, which provides full control on the required temperature regime in bioanalytical analises. The system elements, including field-effect transistors with a nanowire channel, temperature sensors and heaters, were fabricated on a single silicon cristal using electron beam lithography, reactive ion etching and high-vacuum deposition techniques. Unicue electronics have been developed to control and maintain temperature. The dependence of thermometer readout on heating power was measured, which is in good agreement with the results of numerical simulation. A demonstration of a thermoregulation system with PID-feedback was carried out, ensuring the establishment of a desiered temperature in the range of 30-70◦ C in 18 s in liquid. A demonstration of a thermoregulation system for detecting nucleic acids was carried out using synthetic single-stranded DNA, which is a gene fragment from the bacterium Escherichia coli. The minimal detectable response was observed for a sample with a concentration of 3 fM.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"13 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RADIOPROTECTIVE PROTEIN OF TARDIGRADE DSUP (DAMAGE SUPPRESSOR) IS RESISTANT TO HIGH DOSES OF IONIZING RADIATION 沙蜥的辐射防护蛋白dsup（损伤抑制因子）可抵抗高剂量的电离辐射

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410702

M. Zarubin, A.F. Nizamieva, S.I. Alexeev, S. Mitrofanov, Y.E. Gorshkova, E.V. Kravchenko

{"title":"RADIOPROTECTIVE PROTEIN OF TARDIGRADE DSUP (DAMAGE SUPPRESSOR) IS RESISTANT TO HIGH DOSES OF IONIZING RADIATION","authors":"M. Zarubin, A.F. Nizamieva, S.I. Alexeev, S. Mitrofanov, Y.E. Gorshkova, E.V. Kravchenko","doi":"10.55959/msu0579-9392.79.2410702","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2410702","url":null,"abstract":"The unique Dsup protein of the tardigrade Ramazzottiusvarieornatus increases resistance to radiation and oxidative stress in various species of organisms and in human cell culture. According to modeling data,Dsup forms a complex with DNA with an intermolecular distance of ∼4˚A, as a result of which DNA is lessdamaged by reactive oxygen species formed during exposure to radiation.However, the stability of the Dsupprotein itself under the in uence of ionizing radiation remains unclear, which is important for assessing its radioprotective potential and understanding the molecular mechanisms of the action of this protein under conditions of high doses of radiation. In this work, the radiation degradation of the Dsup protein after γ-ray irradiation by small-angle X-ray scattering (SAXS) and protein electrophoresis in polyacrylamide gel under denaturing conditions (SDS-PAGE) was studied for the rst time.It has been shown that, in contrast to the control bovine serum albumin, the spatial and structural characteristics of the Dsup protein remain almost unchanged even when exposed to high doses of radiation (5 and 10 kGy), which suggests its high radiation stability.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"21 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140264682","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the preferential sputtering of alloys during ion bombardmen 关于离子轰击过程中合金的优先溅射

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410301

V. Chernysh

引用次数: 0

BEHAVIOR OF THE GEOMAGNETIC ELD DURING REVERSALS AND EXCURSIONS 地磁场在逆转和偏移期间的行为

Seriya 3: Fizika, Astronomiya Pub Date : 2024-03-05 DOI: 10.55959/msu0579-9392.79.2410901

M. Yu. Reshetnyak

引用次数: 0