Physics of Atomic Nuclei最新文献

Black Holes, Matter, and Antimatter 黑洞，物质和反物质

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600818

A. D. Dolgov

引用次数: 0

Charge Radii and ({beta})-decay Properties of Isotopes Near Magic Neutron Shell ({N=126}) 神奇中子壳层附近同位素的电荷半径和({beta})衰变特性 ({N=126})

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600521

I. N. Borzov, S. V. Tolokonnikov

{"title":"Charge Radii and ({beta})-decay Properties of Isotopes Near Magic Neutron Shell ({N=126})","authors":"I. N. Borzov, S. V. Tolokonnikov","doi":"10.1134/S1063778826600521","DOIUrl":"10.1134/S1063778826600521","url":null,"abstract":"Charge radii for heavy isotopes with (Z=78{-}84), energy releases as well as (beta)-decay half-lives ((T_{1/2})) for the isotopic chain (Z=80) are calculated within the framework of the DF3-a density functional. The isotopic dependence of charge radii exhibits a characteristic kink at the neutron shell (N=126). The experimental kink is well reproduced due to the dependence of the surface and pairing components of the DF3-a functional on the gradient of the nucleon density. It is shown that within this framework which correctly describes the experimental single-particle spectrum of ({}^{208})Pb, the charge radii and (beta)-decay properties in the (N=126) region are simultaneously described. At the same time, the relativistic functionals with the effective mass (m^{*}neq 1) describe the kink at (N=126) in the isotopic dependence of the charge radii exceptionally due to inversion of the (v2g_{9/2}) and (v1i_{11/2}) single-particle levels, a feature which is not observed in experiments. The beta-decay half-lives for Hg isotopes are compared with the experimental data and recent non-relativistic FAM and relativistic RHB (+) RQRPA calculations. The inversion of the high-spin (v2g_{9/2}) and (v1i_{11/2}) single-particle levels observed for most of the relativistic functionals distorts the occupation numbers of quasiparticle levels and the intensities of Gamow–Teller and first-forbidden transitions, leading to an artificial acceleration of (beta)-decay. Using the beta-decay rates calculated with these functionals in the r-process modeling accelerates the synthesis of heavy elements in the third peak region and significantly increases the contribution of neutron-induced fission.","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 3","pages":"293 - 301"},"PeriodicalIF":0.5,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Contributions of Various Mechanisms to the Cross Section of the Reaction ({}^{{6}})Li(({alpha,d}))({}^{{8}})Be at ({E_{alpha}=25}) MeV 各种机制对反应截面的贡献({}^{{6}}) Li(({alpha,d})) ({}^{{8}}) Be at ({E_{alpha}=25}) MeV

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600715

L. I. Galanina, N. S. Zelenskaya, V. M. Lebedev

{"title":"Contributions of Various Mechanisms to the Cross Section of the Reaction ({}^{{6}})Li(({alpha,d}))({}^{{8}})Be at ({E_{alpha}=25}) MeV","authors":"L. I. Galanina, N. S. Zelenskaya, V. M. Lebedev","doi":"10.1134/S1063778826600715","DOIUrl":"10.1134/S1063778826600715","url":null,"abstract":"The reaction ({}^{6})Li((alpha,d))({}^{8})Be(g.s.) at (E_{alpha}=25) MeV is studied in detail by means of the distorted-wave method with allowance for processes associated with the virtual decay of both the projectile alpha particle and the target nucleus ({}^{6})Li. Both processes are considered in the approximation of three- and four-body systems arising via one- and two-step mechanisms illustrated by pole and quadrangle diagrams. The spectroscopic amplitudes, which characterize the probability for the decay of nuclear systems at each vertex of the diagrams being considered are calculated within the shell model. The calculation of the differential cross section for the reaction under study using the FRESCO code is performed with allowance for a coherent summation of the amplitudes of all four mechanisms. It is shown that the interference between the amplitudes of one- and two-step mechanisms in the processes of virtual-deuteron and virtual-alpha-cluster transfer in the reaction ({}^{6})Li((alpha,d))({}^{8})Be(g.s.) is insignificant at almost all deuteron-emission angles but becomes noticeable in the region of medium angles. The interference between the amplitudes of the processes themselves in the reaction ({}^{6})Li((alpha,d))({}^{8})Be(g.s.) plays a substantial role and makes it possible to reach agreement between the calculated differential cross section and its experimental counterpart.","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 3","pages":"260 - 266"},"PeriodicalIF":0.5,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331272","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Properties of Dielectric Detectors in the Registration of Fission Products of Heavy and Superheavy Elements 介电探测器在重元素和超重元素裂变产物登记中的性能

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600727

P. Apel, V. Grachev, N. Kirilkin, N. Konovalova, N. Okateva, N. Polukhina, T. Shchedrina, N. Starkov, E. Starkova

引用次数: 0

Stripping Approximation in Thick Target Bremsstrahlung Spectra Produced by Beta Emitter ({}^{{147}})Pm β发射极({}^{{147}}) Pm产生的厚靶轫致辐射光谱的剥离近似

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600016

Tajinder Singh

引用次数: 0

Features of Photodisintegration of the Rhenium Isotopes ({}^{{185,187}})Re 铼同位素的光分解特征({}^{{185,187}}) Re

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600570

V. V. Varlamov, A. I. Davydov, V. N. Orlin

{"title":"Features of Photodisintegration of the Rhenium Isotopes ({}^{{185,187}})Re","authors":"V. V. Varlamov, A. I. Davydov, V. N. Orlin","doi":"10.1134/S1063778826600570","DOIUrl":"10.1134/S1063778826600570","url":null,"abstract":"New, previously unknown, cross sections of the ((gamma,1n)) and ((gamma,2n)) partial photoneutron reactions on the ({}^{185})Re nucleus are obtained for the first time. Natural relations between the neutron yield cross section (sigma(gamma,xn)=sigma(gamma,1n)+2sigma(gamma,2n)) and the total photoneutron reaction cross section (sigma(gamma,sn)=sigma(gamma,1n)+sigma(gamma,2n)) published as the results of the only experiment in a bremsstrahlung-photon beam are used. It is revealed that the experimental cross sections obtained by this method for these two partial reactions do not meet the objective physical criteria of reliability. The reliable cross sections of the reactions ({}^{185})Re((gamma,1n){}^{184})Re and ({}^{185})Re((gamma,2n){}^{183})Re are evaluated using the experimental–theoretical method, and oppositely directed discrepancies between the experimental and evaluated cross sections are found. These discrepancies are analyzed together with similar data obtained earlier for the isotope ({}^{187})Re. It is found that the relationships between the evaluated and experimental cross sections for the isotopes ({}^{185})Re and ({}^{187})Re differ significantly. It is shown that this is due to an incorrectness of the indirect method for determining the cross section (sigma(gamma,sn)) via introducing in the cross section (sigma(gamma,xn)) corrections calculated according to statistical theory in the cases of significantly and differently deformed ({}^{185})Re and ({}^{187})Re nuclei.","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 3","pages":"251 - 259"},"PeriodicalIF":0.5,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of Cross Sections for the Nuclear Reactions ({}^{{6}})Li(({d,alpha}))({}^{{4}})He,({}^{{6}})Li (({d,p}))({}^{{7}})Li, and ({}^{{6}})Li(({d,p}))({}^{{7}})Li({}^{{*}}) at Deuteron Energies of up to 2.2 MeV 核反应截面的测量 ({}^{{6}})李(({d,alpha})）({}^{{4}})他，({}^{{6}})李(({d,p})）({}^{{7}})Li, and ({}^{{6}})李(({d,p})）({}^{{7}})李({}^{{*}}) 氘核能量高达2.2兆电子伏

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S106377882660048X

S. Yu. Taskaev, M. I. Bikchurina, T. A. Bykov, D. A. Kasatov, Ya. A. Kolesnikov, G. M. Ostreinov, S. S. Savinov, E. O. Sokolova

{"title":"Measurement of Cross Sections for the Nuclear Reactions ({}^{{6}})Li(({d,alpha}))({}^{{4}})He,({}^{{6}})Li (({d,p}))({}^{{7}})Li, and ({}^{{6}})Li(({d,p}))({}^{{7}})Li({}^{{*}}) at Deuteron Energies of up to 2.2 MeV","authors":"S. Yu. Taskaev, M. I. Bikchurina, T. A. Bykov, D. A. Kasatov, Ya. A. Kolesnikov, G. M. Ostreinov, S. S. Savinov, E. O. Sokolova","doi":"10.1134/S106377882660048X","DOIUrl":"10.1134/S106377882660048X","url":null,"abstract":"The interaction of a deuteron beam with lithium is characterized by a high neutron yield, a high neutron energy, and a wide variety of reactions. The cross sections of the reactions ({}^{7})Li((d,n))({}^{8})Be, ({}^{7})Li ((d,n))({}^{8})Be({}^{*}), ({}^{6})Li((d,alpha))({}^{4})He, ({}^{6})Li((d,p))({}^{7})Li, ({}^{6})Li((d,p))({}^{7})Li({}^{*}), ({}^{7})Li((d,alpha))({}^{5})He, and ({}^{7})Li ((d,nalpha))({}^{4})He were measured by our group earlier. In the present study, lithium enriched in the isotope ({}^{6})Li is used instead of natural lithium, and the cross sections of the reactions ({}^{6})Li((d,alpha))({}^{4})He, ({}^{6})Li((d,p))({}^{7})Li, and ({}^{6})Li((d,p))({}^{7})Li({}^{*}) are measured here more precisely. The measured cross sections of the reactions ({}^{6})Li((d,p))({}^{7})Li and ({}^{6})Li((d,p))({}^{7})Li({}^{*}) agree well with our previous measurements up to the deuteron energy of 1.2 MeV but differ from them at deuteron energies above 1.2 MeV.","PeriodicalId":728,"journal":{"name":"Physics of Atomic Nuclei","volume":"89 3","pages":"267 - 276"},"PeriodicalIF":0.5,"publicationDate":"2026-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149331273","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Measurement of the Tensor Analyzing Power ({T_{20}}) for a Deuterons Photodisintegration above the First Resonance Region 第一共振区以上氘核光衰变张量分析能力({T_{20}})的测量

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600569

V. V. Gauzshtein, E. M. Darwish, A. I. Fix, V. I. Ivanov, M. I. Levchuk, A. Yu. Loginov, D. M. Nikolenko, I. A. Rachek, Yu. V. Shestakov, D. K. Toporkov, A. V. Yurchenko, S. A. Zevakov, G. N. Baranov, A. V. Bogomyagkov, V. M. Borin, D. V. Dorokhova, V. L. Dorokhov, A. N. Zhuravlev, S. E. Karnaev, A. A. Kovalenko, V. N. Kudryavtsev, E. B. Levichev, I. B. Logashenko, T. V. Maltsev, R. Z. Mamutov, I. N. Okunev, P. A. Piminov, L. I. Shekhtman, E. A. Simonov, S. V. Sinyatkin, M. A. Skamarokha, E. V. Starostina, I. A. Ulev

引用次数: 0

Photon Reconstruction in the Combined LXe/CsI Calorimeter of the CMD-3 Detector ccd -3探测器LXe/CsI复合量热计中的光子重建

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600430

T. A. Kuznetsov, A. A. Grebenuk, K. Yu. Mikhailov, G. P. Razuvaev, A. V. Semenov, V. E. Shebalin, B. A. Shwartz

引用次数: 0

Rare Neutrino and Radiative Decays of Bottom Baryons in the Relativistic Quark Model 相对论夸克模型中底重子的稀有中微子和辐射衰变

IF 0.5 4区物理与天体物理

Physics of Atomic Nuclei Pub Date : 2026-11-05 DOI: 10.1134/S1063778826600703

V. O. Galkin, A. O. Nemtyrev

引用次数: 0