The European Physical Journal A最新文献_第10页

Improving relativistic energy density functionals with tensor couplings 用张量耦合改进相对论能量密度函数

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-27 DOI: 10.1140/epja/s10050-024-01442-z

Stefan Typel, Shalom Shlomo

引用次数: 0

Core-excited states leading to the high-spin band structure in (^{93})Nb nucleus 导致（^{93}）铌核中高自旋带结构的核激发态

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-25 DOI: 10.1140/epja/s10050-024-01440-1

N. Goel, S. Nag, R. Palit, V. Malik, P. Dey, Md. S. R. Laskar, F. S. Babra, B. Das, A. Kundu, A. Sindhu, Abraham T. Vazhappilly, S. V. Jadhav, B. S. Naidu

引用次数: 0

Phenomenological analysis of triply heavy pentaquarks with configurations (qbar{q}QQQ) and (qqQQbar{Q}) 具有配置 (qbar{q}QQQ 和 (qqQQbar{Q}) 的三重五夸克的现象学分析）

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-25 DOI: 10.1140/epja/s10050-024-01449-6

Ankush Sharma, Alka Upadhyay

{"title":"Phenomenological analysis of triply heavy pentaquarks with configurations (qbar{q}QQQ) and (qqQQbar{Q})","authors":"Ankush Sharma, Alka Upadhyay","doi":"10.1140/epja/s10050-024-01449-6","DOIUrl":"10.1140/epja/s10050-024-01449-6","url":null,"abstract":"<div>We carried out the systematic analysis of the s-wave triply heavy pentaquarks with possible configurations like (qbar{q}QQQ) and (qqQQbar{Q}), ((q = u, d, s) and (Q = c, b) quarks). Special unitary representations are utilized to study the classification scheme for triply heavy pentaquark states. We classified the (qbar{q}QQQ)-type pentaquarks into an octet and (qqQQbar{Q})-type pentaquarks into sextet configurations with the help of SU(3) flavor representation. Also, with the help of SU(2) spin representation, we studied the possible spin assignments ((frac{1}{2}^-), (frac{3}{2}^-), and (frac{5}{2}^-)) for ground state triply heavy pentaquarks. Furthermore, we used the formalism of the extended Gursey–Radicati mass formula and effective mass scheme to estimate the masses of triply heavy pentaquarks. Additionally, we calculated the magnetic moment assignments using the effective mass and screened charge schemes. The predicted outcomes align well with the existing theoretical data and benefit future studies. Our work provides a comprehensive framework that combines the theoretical aspects of SU(3) and SU(2) symmetries with practical predictions for observables, offering a strong foundation for experimental verification. This integrated approach enhances our understanding of the complex interactions within triply heavy pentaquarks and underscores their potential role in probing deeper into the dynamics of the strong force. These findings are crucial for designing future high-energy experiments that directly observe these exotic states and confirm their properties, paving the way for new insights into quantum chromodynamics.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142714475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Radiative corrections in super rosenbluth experiments 超罗森布洛实验中的辐射修正

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-22 DOI: 10.1140/epja/s10050-024-01446-9

Quinn Stefan, Axel Schmidt

引用次数: 0

Measurement of total fission gamma spectrum of 252Cf(s.f.) 测量 252Cf（s.f.）的总裂变伽马能谱

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-21 DOI: 10.1140/epja/s10050-024-01439-8

Tomáš Czakoj, Michal Košťál, Evžen Losa, Stanislav Simakov, Evžen Novák, Martin Schulc, Zdeněk Matěj, Filip Mravec, František Cvachovec, Roberto Capote

{"title":"Measurement of total fission gamma spectrum of 252Cf(s.f.)","authors":"Tomáš Czakoj, Michal Košťál, Evžen Losa, Stanislav Simakov, Evžen Novák, Martin Schulc, Zdeněk Matěj, Filip Mravec, František Cvachovec, Roberto Capote","doi":"10.1140/epja/s10050-024-01439-8","DOIUrl":"10.1140/epja/s10050-024-01439-8","url":null,"abstract":"<div>The paper presents a first comprehensive measurement of the total fission gamma spectrum (TFGS) of 252Cf(s.f.) spanning an energy range from 0.2 to 14.3 MeV using stilbene scintillator spectroscopy. The measurement was performed with the 252Cf(s.f.) source placed in a flexo-rabbit ending, with a stilbene detector located at a distance of 100 cm from the source. The room effect was determined by separate measurement with a 50 cm long lead shielding cylinder placed between the source and the detector. The obtained spectrum was corrected for the effect of the 252Cf source structural parts and the flexo-rabbit ending, using correction function obtained by simulation with the MCNP6.2 code. The main benefit of this independent measurement is the wide energy range, from 0.2 up to 14.3 MeV, in a single experiment, whereas existing measurements typically cover narrower intervals. The knowledge of the TFGS is crucial for various applications involving 252Cf(s.f.) sources, including the design and analysis of nuclear systems, the validation of nuclear data, and the estimation of radiation in the nuclear medicine. The comparison of TFGS with the recently evaluated 252Cf(s.f.) prompt fission gamma spectrum (PFGS) indicates that delayed gammas may contribute above 2 MeV up to the highest energies; the current assumption was that delayed gammas contribution above 2 MeV was negligible.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

From past to future in the science of super heavy elements 超重元素科学从过去走向未来

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-20 DOI: 10.1140/epja/s10050-024-01431-2

Yuri Oganessian

引用次数: 0

Competition of decay modes for (Z=119) and (Z=120) superheavy nuclei Z=119）和（Z=120）超重核衰变模式的竞争

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-18 DOI: 10.1140/epja/s10050-024-01444-x

Wenxia Wang, Nana Ma, Yu Zhang, Zheng Wei, Hongfei Zhang

{"title":"Competition of decay modes for (Z=119) and (Z=120) superheavy nuclei","authors":"Wenxia Wang, Nana Ma, Yu Zhang, Zheng Wei, Hongfei Zhang","doi":"10.1140/epja/s10050-024-01444-x","DOIUrl":"10.1140/epja/s10050-024-01444-x","url":null,"abstract":"<div>Synthesis of new elements with (Z ge 119) is currently a forefront issue in modern nuclear physics. The central question then arises as to the stability and decay properties of these new elements. In this study, the competition between (alpha )-decay, spontaneous fission, cluster radioactivity, and (beta )-decay in the isotopic chains of (Z=119) and (Z=120) was investigated using the finite-range droplet model (FRDM) and Weizsäcker -Skyrme model (WS4). The Royer formula, Karpov formula, Universal Decay Law, and Sobhani formula were applied to analyze each respective decay mode. It was found that cluster radioactivity and (beta )-decay is at a disadvantage in these isotopic chains, with (alpha )-decay and SF being the dominant decay modes. For nuclei with longer half-lives for the dominant decay modes, (alpha )-decay tends to be the most prevalent. (N=184) is a candidate for the neutron magic number based on WS4 and FRDM. In addition, the generalized liquid drop model with corrections for surface diffuseness effects was employed to study (alpha )-decay across four different sets of mass models: FRDM, WS4, Koura–Tachibana–Uno–Yamada (KTUY) mass formula, and Niu2022. The calculation of (alpha )-decay half-lives was further optimized through the use of the radial basis function network.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations 固体薄靶中反质子静止湮灭以及与蒙特卡罗模拟的比较

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-17 DOI: 10.1140/epja/s10050-024-01428-x

C. Amsler, H. Breuker, M. Bumbar, M. Cerwenka, G. Costantini, R. Ferragut, M. Fleck, M. Giammarchi, A. Gligorova, G. Gosta, E. D. Hunter, C. Killian, B. Kolbinger, V. Kraxberger, N. Kuroda, M. Lackner, M. Leali, G. Maero, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, A. Nanda, L. Nowak, S. Rheinfrank, M. Romé, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, M. van Beuzekom, L. Venturelli, A. Weiser, E. Widmann, Y. Yamazaki, J. Zmeskal

{"title":"Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations","authors":"C. Amsler, H. Breuker, M. Bumbar, M. Cerwenka, G. Costantini, R. Ferragut, M. Fleck, M. Giammarchi, A. Gligorova, G. Gosta, E. D. Hunter, C. Killian, B. Kolbinger, V. Kraxberger, N. Kuroda, M. Lackner, M. Leali, G. Maero, V. Mascagna, Y. Matsuda, S. Migliorati, D. J. Murtagh, A. Nanda, L. Nowak, S. Rheinfrank, M. Romé, M. C. Simon, M. Tajima, V. Toso, S. Ulmer, M. van Beuzekom, L. Venturelli, A. Weiser, E. Widmann, Y. Yamazaki, J. Zmeskal","doi":"10.1140/epja/s10050-024-01428-x","DOIUrl":"10.1140/epja/s10050-024-01428-x","url":null,"abstract":"<div>The mechanism of antiproton–nucleus annihilation at rest is not fully understood, despite substantial previous experimental and theoretical work. In this study we used slow extracted antiprotons from the ASACUSA apparatus at CERN to measure the charged particle multiplicities and their energy deposits from antiproton annihilations at rest on three different nuclei: carbon, molybdenum and gold. The results are compared with predictions from different models in the simulation tools Geant4 and FLUKA. A model that accounts for all the observed features is still missing, as well as measurements at low energies, to validate such models.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01428-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An empirical formula for the proton radioactivity 质子放射性的经验公式

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-16 DOI: 10.1140/epja/s10050-024-01443-y

Jie-Dong Jiang, Xiao Liu, Yang-yang Xu, Biao He, Xi-Jun wu, Xiao-Hua Li

{"title":"An empirical formula for the proton radioactivity","authors":"Jie-Dong Jiang, Xiao Liu, Yang-yang Xu, Biao He, Xi-Jun wu, Xiao-Hua Li","doi":"10.1140/epja/s10050-024-01443-y","DOIUrl":"10.1140/epja/s10050-024-01443-y","url":null,"abstract":"<div>Proton radioactivity is an exotic decay mode of proton-rich nuclei far from the (beta )-stability line and shares the similar decay mechanism theory of barrier penetration as (alpha ) decay. In present work, we extend the Hatsukawa formula (Hatsukawa et al. in Phys Rev C 42:674, 1990) for (alpha ) decay to proton radioactivity and propose an empirical formula for evaluating the proton radioactivity half-lives of proton nuclei with Z > 68. Using this formula, we systematically calculate the proton radioactivity half-lives of 33 spherical proton emitters with the corresponding root-mean-square (rms) deviation being 0.391. It is found that the calculated half-lives can reproduce the experimental data well. Moreover, we extend this formula to predict the proton radioactivity half-lives of 18 spherical proton emitters, whose proton radioactivity is energetically allowed or observed but not yet quantified. For comparison, unified fission model (UFM), Coulomb potential and proximity potential model (CPPM), universal decay law for proton emission (UDLP) and new Geiger-Nuttall law (NG-N) are also used. All the predictions are basically consistent with each other.</div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 11","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142645698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Prompt neutron multiplicity from spontaneous fission of (^{244})Fm (^{244})Fm自发裂变产生的急中子倍率

IF 2.6 3区物理与天体物理

The European Physical Journal A Pub Date : 2024-11-13 DOI: 10.1140/epja/s10050-024-01441-0

R. S. Mukhin, A. V. Isaev, I. I. Ulanova, A. I. Svirikhin, M. A. Bychkov, M. L. Chelnokov, V. I. Chepigin, H. M. Devaraja, O. Dorvaux, B. Gall, K. Hauschild, I. N. Izosimov, A. A. Kuznetsova, A. Lopez-Martens, O. N. Malyshev, A. G. Popeko, Yu. A. Popov, B. Sailaubekov, E. A. Sokol, M. S. Tezekbayeva, N. I. Zamyatin, A. V. Yeremin

引用次数: 0