We systematically calculate the total reaction cross sections of oxygen isotopes, $^{15-24}$O, on a $^{12}$C target at high energies using the Glauber theory. The oxygen isotopes are described with Slater determinants generated from a phenomenological mean-field potential. The agreement between theory and experiment is generally good, but a sharp increase of the reaction cross sections from ^{21}O to ^{23}O remains unresolved. To examine the sensitivity of the diffraction pattern of elastic scattering to the nuclear surface, we study the differential elastic-scattering cross sections of proton-^{20,21,23}O at the incident energy of 300 MeV by calculating the full Glauber amplitude.
The Gamow shell model has shown to efficiently describe weakly bound and unbound nuclear systems, as internucleon correlations and continuum coupling are both taken into account in this model. In the present work, we study neutron-dripline oxygen isotopes. It is hereby demonstrated that the presence of continuum coupling is important for the description of oxygen isotopes at dripline, and especially to assess the eventual bound or unbound character of $^{28}$O. Our results suggest that the ground state of $^{28}$O is weakly unbound and is similar to the narrow resonant $^{26}$O ground state. P…
用反对称分子动力学（AMD）加生成坐标方法（GCM）研究了16 O、18 O和20 O的团簇结构.我们发现了18 O的K^π=0 $_2^+$和0 $_1^-$转动带，它们具有突出的14 C +α团簇结构。2000年聚类系统学更加丰富。我们认为K^π=0 $_2^+$带是12 C +α+4n和14 C +6He团簇结构的混合带，K^π=0 $_1^-$带是14 C +6He团簇结构的混合带。还发现了具有明显的16 C +α团簇结构的K^π=0 $_3^+$和0 $_2^-$带。
We study the exotic deformed nucleus $^{31}$Ne using an approach that combines self-consistent structure and reaction theory. We utilize the fully-relativistic, microscopic deformed Hartree-Bogoliubov theory in continuum (DRHBc) to demonstrate that deformation and pairing correlations give rise to a halo structure with large-amplitude $p$-wave configuration in $^{31}$Ne. We then use the valence nucleon wave functions and angle-averaged density distributions of $^{30}$Ne from this model as input for a Glauber reaction model to study the observables of neutron-rich Neon isotopes and search for h…
In the present work, we have done a comprehensive study of low-lying energy spectrum for oxygen and fluorine chains using $ab~initio$ no core shell model. We have used inside nonlocal outside Yukawa (INOY) potential, which is a two body interaction but also has the effect of three body forces by short range and nonlocal character. Also, we have performed calculations with N3LO and N2LOopt interactions and compared corresponding results with the experimental data and phenomenological USDB interaction. We have reached up to $N_{max}$=6 for $^{18-21}$O and $^{18-19}$F, $N_{max}$=4 for other oxyge…
Reaction cross sections of carbon isotopes incident on a proton
本文系统地研究了N=6-16的碳同位素在较宽入射能量范围内与质子靶的总反应截面，着重讨论了与碳靶情况的差别。分析包括40 A MeV的^{19，20，22}C的反应截面，其数据最近在RIKEN测量。用Glauber理论计算了反应截面。为了描述碳同位素的本征结构，我们使用一个由唯象平均场势产生的斯莱特行列式，并构造密度分布。为了超越简单的平均场模型，我们采用了两种动力学模型：一种是奇中子核的core+n模型，另一种是16 C和22 C的core+n+n模型。我们提出的经验公式是有用的，在预测未知的截面。
A campaign of intermediate energy (300-450 MeV/u) proton-induced nucleon knockout measurements in inverse kinematics has been recently undertaken at the R 3 B/LAND setup at GSI. We present a systematic theoretical analysis of these data with the aim of studying the quenching of the single-particle strengths and its binding-energy dependence. For that, the measured semi-inclusive (p, 2p) and (p, pn) cross sections are compared with theoretical predictions based on single-particle cross sections derived from a novel coupled-channels formalism and shell-model spectroscopic factors. A systematic r…
There has been an upsurge of interest in two-nucleon decays thanks to the studies of nucleon-nucleon correlations. In our previous work, based on a novel time-dependent three-body approach, we demonstrated that the energy and angular correlations of the emitted nucleons can shed light on the structure of nucleonic pairs formed inside the nucleus. In this work, we apply the new framework to study the decay dynamics and properties of some extreme proton-rich and neutron-rich oxygen isotopes, including two-proton ($2p$) decays of $^{11,12}$O and two-neutron ($2n$) decay of $^{26}$O. Here we show …
Above-barrier fusion cross-sections for an isotopic chain of oxygen isotopes with A=16-19 incident on a $^{12}$C target are presented. Experimental data are compared with both static and dynamical microscopic calculations. These calculations are unable to explain the $\sim$37\% increase in the average above-barrier fusion cross-section observed for $^{19}$O as compared to $β$-stable oxygen isotopes. This result suggests that for neutron-rich nuclei existing time-dependent Hartree-Fock calculations underpredict the role of dynamics at near-barrier energies. High-quality measurement of above-bar…
Theoretical investigation of charge-changing cross section and interaction cross section for Be, B, C, N, O, and F isotopes on $^{12}$C at 200-1050 MeV/nucleon
One neutron triaxial halo candidates in aluminum isotopes from reaction observables
School of Physics, Beihang University（北京航空航天大学物理学院）；National Key Laboratory of Neutron Science and Technology, Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics（中国工程物理研究院核物理与化学研究所中子科学与技术国家重点实验室）；Baoding Hospital of Beijing Children’s Hospital（北京儿童医院保定医院）
Background: Nuclear radius is one of the most important and basic properties of atomic nuclei and its evolution is closely related to the saturation of the nuclear density in the internal region but the systematics of the nuclear radii for the neutron-rich unstable nuclei is not well known. Purpose: Motivated by the recent interaction cross section measurement which indicates the 48Ca core swelling in the neutron-rich Ca isotopes, we explore the mechanism of the enhancement of the neutron and proton radii for spherical nuclei. Methods: Microscopic Hartree-Fock calculations with three sets of S…
