arXiv: Nuclear Theory最新文献_第5页

Nuclear de-excitations in low-energy charged-current νe scattering on Ar40 Ar40上低能带电电流νe散射中的核去激发

arXiv: Nuclear Theory Pub Date : 2020-10-05 DOI: 10.1103/PHYSREVC.103.044604

S. Gardiner

{"title":"Nuclear de-excitations in low-energy charged-current \u0000νe\u0000 scattering on \u0000Ar40","authors":"S. Gardiner","doi":"10.1103/PHYSREVC.103.044604","DOIUrl":"https://doi.org/10.1103/PHYSREVC.103.044604","url":null,"abstract":"Background: Large argon-based neutrino detectors, such as those planned for the Deep Underground Neutrino Experiment (DUNE), have the potential to provide unique sensitivity to low-energy ($sim$10 MeV) electron neutrinos produced by core-collapse supernovae. Despite their importance for neutrino energy reconstruction, nuclear de-excitations following charged-current $nu_e$ absorption on $^{40}$Ar have never been studied in detail at supernova energies. Purpose: I develop a model of nuclear de-excitations that occur following the $^{40}mathrm{Ar}(nu_e,e^{-})^{40}mathrm{K}^*$ reaction. This model is applied to the calculation of exclusive cross sections. Methods: A simple expression for the inclusive differential cross section is derived under the allowed approximation. Nuclear de-excitations are described using a combination of measured $gamma$-ray decay schemes and the Hauser-Feshbach statistical model. All calculations are carried out using a novel Monte Carlo event generator called MARLEY (Model of Argon Reaction Low Energy Yields). Results: Various total and differential cross sections are presented. Two de-excitation modes, one involving only $gamma$-rays and the other including single neutron emission, are found to be dominant at few tens-of-MeV energies. Conclusions: Nuclear de-excitations have a strong impact on the achievable energy resolution for supernova $nu_e$ detection in liquid argon. Tagging events involving neutron emission, though difficult, could substantially improve energy reconstruction. Given a suitable calculation of the inclusive cross section, the MARLEY nuclear de-excitation model may readily be applied to other scattering processes.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78795469","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: 10

Hyperon halo structure of C and B isotopes C和B同位素的超子晕结构

arXiv: Nuclear Theory Pub Date : 2020-09-28 DOI: 10.1103/PHYSREVC.103.034321

Ying Zhang, H. Sagawa, E. Hiyama

引用次数: 1

Chiral crossover transition from the Dyson-Schwinger equations in a sphere 球中Dyson-Schwinger方程的手性交叉跃迁

arXiv: Nuclear Theory Pub Date : 2020-09-25 DOI: 10.1103/physrevd.102.114011

Yingru Xu, Chao Shi, Xiao-Tao He, H. Zong

引用次数: 1

Novel regularization scheme for nucleon-nucleon lattice simulations with effective field theory 基于有效场论的核子-核子晶格模拟的新正则化方案

arXiv: Nuclear Theory Pub Date : 2020-09-25 DOI: 10.1103/PhysRevC.102.044001

M. Ahmadi, M. Hadizadeh, M. Radin, S. Bayegan

引用次数: 2

Proximity effect of pair correlation in the inner crust of neutron stars 中子星内壳中对相关的邻近效应

arXiv: Nuclear Theory Pub Date : 2020-09-24 DOI: 10.1093/ptep/ptaa174

Toshiyuki Okihashi, M. Matsuo

引用次数: 2

Magnetic field effect on the pion superfluid 磁场对介子超流体的影响

arXiv: Nuclear Theory Pub Date : 2020-09-24 DOI: 10.1103/PhysRevD.102.114006

S. Mao

引用次数: 4

Phenomenological quark-hadron equations of state with first-order phase transitions for astrophysical applications

arXiv: Nuclear Theory Pub Date : 2020-09-22 DOI: 10.1103/physrevd.103.023001

N. Bastian

引用次数: 11

Variational and parquet-diagram calculations for neutron matter. II. Twisted chain diagrams 中子物质的变分和拼格图计算。2扭链图

arXiv: Nuclear Theory Pub Date : 2020-09-22 DOI: 10.1103/physrevc.102.064305

E. Krotscheck, J. Wang

引用次数: 1

Pairing vibrations in the interacting boson model based on density functional theory 基于密度泛函理论的相互作用玻色子模型中的配对振动

arXiv: Nuclear Theory Pub Date : 2020-09-22 DOI: 10.1103/physrevc.102.054313

K. Nomura, D. Vretenar, Z. P. Li, J. Xiang

{"title":"Pairing vibrations in the interacting boson model based on density functional theory","authors":"K. Nomura, D. Vretenar, Z. P. Li, J. Xiang","doi":"10.1103/physrevc.102.054313","DOIUrl":"https://doi.org/10.1103/physrevc.102.054313","url":null,"abstract":"We propose a method to incorporate the coupling between shape and pairing collective degrees of freedom in the framework of the interacting boson model (IBM), based on the nuclear density functional theory. To account for pairing vibrations, a boson-number non-conserving IBM Hamiltonian is introduced. The Hamiltonian is constructed by using solutions of self-consistent mean-field calculations based on a universal energy density functional and pairing force, with constraints on the axially-symmetric quadrupole and pairing intrinsic deformations. By mapping the resulting quadrupole-pairing potential energy surface onto the expectation value of the bosonic Hamiltonian in the boson condensate state, the strength parameters of the boson Hamiltonian are determined. An illustrative calculation is performed for $^{122}$Xe, and the method is further explored in a more systematic study of rare-earth $N=92$ isotones. The inclusion of the dynamical pairing degree of freedom significantly lowers the energies of bands based on excited $0^+$ states. The results are in quantitative agreement with spectroscopic data, and are consistent with those obtained using the collective Hamiltonian approach.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89936364","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: 3

Relation between transition density and proton inelastic scattering by C12 target at Ep=65 and 200 MeV 跃迁密度与C12靶在Ep=65和200 MeV下质子非弹性散射的关系

arXiv: Nuclear Theory Pub Date : 2020-09-22 DOI: 10.1103/PHYSREVC.103.044602

T. Furumoto, M. Takashina

{"title":"Relation between transition density and proton inelastic scattering by \u0000C12\u0000 target at \u0000Ep=65\u0000 and 200 MeV","authors":"T. Furumoto, M. Takashina","doi":"10.1103/PHYSREVC.103.044602","DOIUrl":"https://doi.org/10.1103/PHYSREVC.103.044602","url":null,"abstract":"We calculate proton elastic and inelastic scatterings with a microscopic coupled channel (MCC) calculation. The diagonal and coupling potentials including the spin-orbit part are obtained by folding a complex $G$-matrix effective nucleon-nucleon interaction with a transition density. This is the first time that the present folding prescription for the spin-orbit part is applied to the proton inelastic scattering. We apply the MCC calculation to the proton elastic and inelastic (0$^+_2$) scatterings by $^{12}$C target at $E_p$ = 65 and 200 MeV, respectively. The role of diagonal and coupling potentials for the central and spin-orbit parts is checked. In addition, the relation between the transition density and the proton inelastic scattering is investigated with the modified wave function and the modified transition density, respectively. The inelastic cross section is sensitive to the strength and shape of the transition density, but the inelastic analyzing power is sensitive only to the shape of that. Finally, we make clear the property of the inelastic analyzing power derived from the transition density without an ambiguity.","PeriodicalId":8463,"journal":{"name":"arXiv: Nuclear Theory","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73247902","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