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The Maier-Leibniz Doppler-Shift technique is the most popular and accurate technique used in fission experiments to separate the yield of gamma rays from each of the two fission fragments. The technique exploits the aberration, i.e., the…

仪器与探测器 · 物理学 2021-09-30 Stefano Marin , M. Stephan Okar , Shaun D. Clarke , Sara A. Pozzi

Two-particle rapidity (or pseudorapidity) correlation function $C(y_1, y_2)$ was used in analysing fluctuation of particle density distribution in rapidity in high-energy heavy-ion collisions. In our research, we argue that for a centrality…

核理论 · 物理学 2017-05-22 Ronghua He , Jing Qian , Lei Huo

Spontaneous fission of 252Cf and fusion-induced fission of 250Cf are investigated within a multi-dimensional Langevin model. The potential-energy surface is calculated in the macroscopic-microscopic LSD+Yukawa-folded approach using the…

核理论 · 物理学 2024-06-13 K. Pomorski , B. Nerlo-Pomorska , J. Bartel , C. Schmitt , Z. G. Xiao , Y. J. Chen , L. L. Liu

An impulse approximation analysis is described of the generalized parton distributions (GPDs) H and E of the 3He nucleus, quantities which are accessible in hard exclusive processes, such as coherent deeply virtual Compton scattering…

核理论 · 物理学 2015-06-11 M. Rinaldi , S. Scopetta

The sample of neutron stars with a measured mass is growing quickly. With the latest sample, we adopt both a flexible Gaussian mixture model and a Gaussian plus Cauchy-Lorentz component model to infer the mass distribution of neutron stars…

高能天体物理现象 · 物理学 2020-09-10 Dong-Sheng Shao , Shao-Peng Tang , Jin-Liang Jiang , Yi-Zhong Fan

Prompt fission neutron spectra produced up to 20 MeV. Simultaneous analysis of measured and calculated data for 233U(n, F), 235U(n, F) and 239Pu(n, F) maintains stronger justification for the predicted PFNS of 233U(n, F). For the latter the…

核理论 · 物理学 2026-03-06 V. M. Maslov

It has been long recognized that radiation transport theory is the foundation for the planning and analysis of X-ray (gamma-ray) radiation therapy and for imaging. In less common but appropriate occasions as an alternative to X-rays or…

应用物理 · 物理学 2021-04-20 Eric V. Steinfelds , Keith Andrew

The double neutron/proton ratio of nucleon emissions taken from two reaction systems using four isotopes of the same element, namely, the neutron/proton ratio in the neutron-rich system over that in the more symmetric system, has the…

核理论 · 物理学 2009-11-11 Bao-An Li , Lie-Wen Chen , Gao-Chan Yong , Wei Zuo

The neutron-neutron ($nn$) correlation function has been measured in 25 MeV/u $^{124}$Sn+$^{124}$Sn reactions. Using the Lednick\'y-Lyuboshitz approach, the $nn$ scattering length and effective range ($f_{0}^{nn}$, $d_{0}^{nn}$), as well as…

The neutron-deuteron (nd) scattering is solved in the Faddeev formalism, employing the energy-independent version of the quark-model baryon-baryon interaction fss2. The differential cross sections and the spin polarization of the elastic…

核理论 · 物理学 2011-07-06 Kenji Fukukawa , Yoshikazu Fujiwara

[Background] The fission mechanism of sub-lead nuclides remains unclear, especially the types of fission modes involved and their corresponding shell effects. [Purpose] The aim is to identify the different modes in the fission of…

核理论 · 物理学 2024-03-15 Y. G. Huang , F. C. Gu , Y. J. Feng , H. Wang , E. X. Xiao , X. Lei , L. Zhu , J. Su

The GEneral description of Fission observables (GEF) model was developed to produce fission related nuclear data which are of crucial importance for basic and applied nuclear physics. The investigation of the performance of the GEF code is…

核实验 · 物理学 2018-10-17 C. Schmitt , K. -H. Schmidt , B. Jurado

We investigate the two-photon corrections to the process $p\bar{p} \to e^+e^-$ at large momentum transfer, aimed to access the time-like nucleon form factors. We estimate the two-photon corrections using a hard rescattering mechanism, which…

高能物理 - 唯象学 · 物理学 2015-03-18 Julia Guttmann , Nikolai Kivel , Marc Vanderhaeghen

Revealing the neutron density distribution in the nucleus is one of the crucial tasks of nuclear physics. Within the framework of the ultrarelativistic quantum molecular dynamic model followed by a correlation afterburner program, we…

The prompt neutron averaged number and the dependence of prompt neutron yield on fragment mass {\nu}(A) of photofission of actinide nuclei 235U and 238U in the giant dipole resonance energy range has been parameterized. This allows us to…

High quality nuclear data is the most fundamental underpinning for all neutron metrology applications. This paper describes the release of version II of the International Reactor Dosimetry and Fusion File (IRDFF-II) that contains a…

The ratio of pairing-energy coefficient to temperature ($a_{p}/T$) of neutron-rich fragments produced in spallation reactions has been investigated by adopting an isobaric yield ratio method deduced in the framework of a modified Fisher…

核理论 · 物理学 2018-03-14 Fei Niu , Chun-Wang Ma

With an extreme neutron-to-proton ratio of N/Z=3, 8He provides an ideal laboratory for the study of a variety of exotic phenomena, such as the emergence of a soft dipole mode that is dominated by transitions into the continuum. In this…

核理论 · 物理学 2022-04-27 J. Piekarewicz

Eighty years after its experimental discovery, a microscopic description of induced nuclear fission based solely on the interactions between neutrons and protons and quantum many-body methods still poses formidable challenges. The goal of…

核理论 · 物理学 2015-06-17 N. Schunck , D. Duke , H. Carr , A. Knoll

Inverse kinematics coupled to a high-resolution spectrometer is used to investigate the isotopic yields of fission fragments produced in reactions between a 238U beam at 24 MeV/u and 9Be and 12C targets. Mass, atomic number and isotopic…