Mass measurements of neutron-rich nuclei at JYFLTRAP
S. Rahaman, V. -V. Elomaa, T. Eronen, U. Hager, J. Hakala, A. Jokinen, A. Kankainen, J. Rissanen, C. Weber, J. Aysto, the IGISOL group
用JYFLTRAP质谱计测量了N = 28 ~ N = 82区域的丰中子核质量，测量不确定度优于10 keV。综述了对原子核结构的影响和r-过程路径。
The JYFLTRAP mass spectrometer was used to measure the masses of neutron-rich nuclei in the region between N = 28 to N = 82 with uncertainties better than 10 keV. The impacts on nuclear structure and the r-process paths are reviewed.
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Precision mass measurements of radioactive nuclei at JYFLTRAP
用JYFLTRAP型潘宁阱质谱计测量了放射性核素的原子质量，测量不确定度优于10 keV。测量了N = Z线周围缺中子核的原子质量，以提高对rp过程路径和SbSnTe循环的理解。此外，还测量了富中子镓（Z = 31）到钯（Z = 46）核的质量。综述了物理效应对原子核结构和r过程的影响。通过研究A = 100附近的对能，对核形变有了更好的理解。
Preparing isomerically pure beams of short-lived nuclei at JYFLTRAP
在JYFLTRAP串联潘宁阱系统上开发了一种制备质量分辨能力超过100，000的异构清洁离子样品的新方法。该方法利用偶极射频激励的离子运动与分离的振荡领域中的精密陷阱。在随后再转移到净化阱期间，污染物被拒绝，因此，剩余的束被异构地清洁。这种新开发的方法适用于非常高分辨率的清洁，并且比迄今为止在潘宁阱质谱中使用的方法至少快五倍。
Precision mass measurements of neutron-rich rhodium isotopes have been performed at the JYFLTRAP Penning trap mass spectrometer at the Ion Guide Isotope Separator On-Line (IGISOL) facility. We report results on ground- and isomeric-state masses in $^{110,112,114,116,118}$Rh and the very first mass measurement of $^{120}$Rh. The isomeric states were separated and measured for the first time using the phase-imaging ion-cyclotron-resonance (PI-ICR) technique. For $^{112}$Rh, we also report new half-lives for both the ground state and the isomer. The results are compared to theoretical predictions…
Probing the N=104 midshell region for the r process via precision mass spectrometry of neutron-rich rare-earth isotopes with the JYFLTRAP double Penning trap
本文利用JYFLTRAP双潘宁阱对富中子稀土同位素进行高精度质量测量，首次测定多个核素质量并扩展N=104区域双中子分离能系统学，为r过程提供更精确的质量约束，显著改善A=170附近丰度计算。
The JYFLTRAP double Penning trap at the Ion Guide Isotope Separator On-Line (IGISOL) facility has been used to measure the atomic masses of 13 neutron-rich rare-earth isotopes. Eight of the nuclides, $^{161}$Pm, $^{163}$Sm, $^{164,165}$Eu, $^{167}$Gd, and $^{165,167,168}$Tb, were measured for the first time. The systematics of the mass surface has been studied via one- and two-neutron separation energies as well as neutron pairing-gap and shell-gap energies. The proton-neutron pairing strength has also been investigated. The impact of the new mass values on the astrophysical rapid neutron capt…
Binding energies of ground and isomeric states in neutron-rich ruthenium isotopes: measurements at JYFLTRAP and comparison to theory
本研究利用JYFLTRAP质谱仪精确测量富中子钌同位素的质量，首次确定其同质异能激发能，并改进基态质量，从而约束双中子分离能演化，验证了BSkG1模型预测。
High-precision measurements of low-lying isomeric states in $^{120-124}$In with JYFLTRAP double Penning trap
本文利用JYFLTRAP双潘宁阱质谱仪高精度测量了丰中子$^{120-124}$In同位素的同核异能态激发能和质量，并提取了$^{122}$Cd半衰期，实验结果与多种理论计算进行了对比。
The rare-earth peak in the $r$-process abundance pattern depends sensitively on both the astrophysical conditions and subtle changes in nuclear structure in the region. This work takes an important step elucidating the nuclear structure and reducing the uncertainties in $r$-process calculations via precise atomic mass measurements at the JYFLTRAP double Penning trap. $^{158}$Nd, $^{160}$Pm, $^{162}$Sm, and $^{164-166}$Gd have been measured for the first time and the precisions for $^{156}$Nd, $^{158}$Pm, $^{162,163}$Eu, $^{163}$Gd, and $^{164}$Tb have been improved considerably. Nuclear struct…
Mass measurements in the $^{132}$Sn region with the JYFLTRAP double Penning trap mass spectrometer
使用 JYFLTRAP 双彭宁阱质谱仪测量了丰中子 Sb 和 I 同位素质量，提高了精度并解决了先前测量的冲突。
Precise atomic masses of neutron-rich Br and Rb nuclei close to the r-process path
Penning阱质谱仪JYFLTRAP与位于于韦斯屈莱的离子引导同位素分离器在线（IGISOL）设备耦合，用于测量富含中子的85至92 Br和94至97 Rb同位素的原子质量，其典型精度小于10 keV。与旧数据的差异进行了讨论。比较不同的质量模型。通过对两中子分离能和壳层能隙的研究，对原子核结构、壳层和亚壳层闭合等细节进行了研究。
Probing the quantum phase transition around $N\approx60$ via mass measurements of technetium isotopes
通过测量技术元素同位素质量，发现N≈60附近的技术元素同位素不属Zr60附近形状共存岛的一部分。
Coulomb displacement energies as a probe for nucleon pairing in the $f_{7/2}$ shell
用双潘宁阱质谱计JYFLTRAP对$T=1/2$镜像核的$Q_\mathrm{EC}$值进行了一系列高精度测量，研究了其库仑位移能。最近，$f_{7/2}$ -壳镜核$^{45}$ V（$Q_\mathrm{EC}=7123.82(22)$ keV）和$^{49}$ Mn（$Q_\mathrm{EC}=7712.42(24)$ keV）的$Q_\mathrm{EC}$值已经以前所未有的精度测量.数据显示，采用的$^{49}$ Mn原子质量评估2012年值中存在16 keV（$1.6σ$）偏移，表明需要进一步测量以验证等压多重态质量方程的二次形式的分解。精确测量的$Q_\mathrm{EC}$值证实，库仑能量中的配对效应在进入$f_{7/2}$壳层时被淬灭，并在中壳层中达到最小值。
Atomic masses of seven $T_z=-1$, $fp$-shell nuclei from $^{44}$V to $^{56}$Cu and two low-lying isomers, $^{44m}$V ($J^π=6^+$) and $^{52m}$Co ($J^π=2^+$), have been measured with relative precisions of $1-4\times 10^{-7}$ with Isochronous Mass Spectrometry (IMS) at CSRe. The masses of $^{56}$Cu, $^{52g,52m}$Co, and $^{44m}$V were measured for the first time in this experiment. The Mass Excesses ($ME^{\prime}$s) of $^{44}$V, $^{48}$Mn, $^{50}$Fe, and $^{54}$Ni are determined with an order of magnitude improved precision compared to the literature values. $^{52g,52m}$Co and $^{56}$Cu are found t…
Haloes and Clustering in Light, Neutron-Rich Nuclei
群集是一种相对普遍的现象，在整个核景观中有许多伪装。关于晕系统的研究和集群轻，富中子核的选定的主题进行了讨论，通过说明性的例子从Be同位素链。
Evolution of the N=50 shell gap energy towards $^{78}$Ni
首次测量了富中子同位素$^{76-80}$ Zn、$^{78-83}$ Ga、$^{80-85}Ge, $ ^{81-87} $As and $ ^{84-89} $Se have been measured with high precision using the Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. The masses of $ ^{82，83} $Ga, $ ^{83-85} $Ge, $ ^{84-87} $As and $ ^{89}$Se的原子质量。这些新的数据代表了在这个中子丰富的区域的质量的知识的重大改进。双中子分离能提供了N=50的壳层能隙向锗Z=32方向减少以及随后在镓（Z=31）处增加的证据。的数据进行了比较与一些理论模型。获得了壳间隙对镍（Z=28）的持久刚性的指示。
Precision Mass Measurements beyond $^{132}$Sn: Anomalous behaviour of odd-even staggering of binding energies
使用潘宁阱质谱仪JYFLTRAP以高精度（10 ppb）测量了丰中子同位素$^{121-128}$ Cd、$^{129,131}$ In、$^{130-135}$ Sn、$^{131-136}$ Sb和$^{132-140}$ Te的原子质量。其中，首次测量了四个r过程核$^{135}$ Sn、$^{136}$ Sb和$^{139,140}$ Te的质量。数据揭示了在$Z$ =50处的强$N$ =82壳间隙，但表明了$Z>50$的相关性的重要性。经验中子配对间隙表示为同位素质量的奇偶交错，显示出Sn在$N$ =82处的强烈猝灭，$Z$依赖性是当前理论模型无法解释的。
Probing Halo and Molecular States in Light, Neutron-Rich Nuclei
讨论了轻核、丰中子核中的晕态和分子态。特别是，工作$xα$：X $n$结构的简要回顾。通过$^6$ He（p，$γ$）反应的例子，介绍了质子辐射俘获作为成簇探针的应用。
Synthesis of new neutron-rich heavy nuclei: An experimentalist's view
我试图从实验上评估合成新的丰中子超重核的前景。我考虑了三种合成丰中子超重核的可能途径：（a）使用丰中子放射性核束。(b)阻尼碰撞的使用和（c）多核子转移反应的使用。我认为，使用轻富n放射性核束和ReA 3，FRIB和SPIRAL 2的目标光束合成新的富n同位素的Rf-Bh的前景。对于阻尼碰撞路径，我提出的替代反应，160 Gd +186 W的研究结果。这些数据表明形成的Au（trans-target）碎片和耗尽的裂变和碎片发射的目标样碎片的产量。这些数据进行了比较，预测Zagrebaev和Greiner。对于多核子转移反应，讨论了136 Pb +208 Pb反应的研究结果。我考虑了用放射性核束进行多核子转移反应的可能性。
Production of neutron-rich nuclei in fragmentation reactions of 132Sn projectiles at relativistic energies
在GSI的FRS装置上研究了950 MeV/u的~（238）U射弹裂变产生的~（132）Sn丰中子核的碎裂。这项工作是第一次调查中质量的放射性射弹与一个大的中子过剩的碎裂。剩余核的测量生产截面与可能使用的两阶段反应计划（裂变+碎裂）在未来的稀有离子束设施中生产极富中子的中等质量核有关。此外，新的数据将使人们更好地理解碎裂反应中的“记忆”效应。
Experimental studies of unbound neutron-rich nuclei
双中子晕核的三体描述依赖于各组分之间的两体相互作用。为了给$^{14}$ Be和$^{17}$ B的计算提供约束条件，用单质子敲除方法研究了$^{13}$ Be和$^{16}$ B的中子非束缚态.文中对实验技术和结果进行了讨论。
Evidence for a change in the nuclear mass surface with the discovery of the most neutron-rich nuclei with 17<Z <25
本文介绍了用~（76）Ge束分裂产生丰中子核的测量结果。测量了大范围核的截面，包括15种新同位素，它们是元素氯到锰中中子最丰富的核素（50-Cl，53-Ar，55，56-K，57，58-Ca，59，60，61-Sc，62，63-Ti，65，66-V，68-Cr，70-Mn）。增强的截面的几个新的核相对于一个简单的热蒸发框架，以前示出描述类似的生产截面，表明在该地区的核周围62-Ti可能比目前的质量模型预测的更稳定，并可能是一个新的反转岛类似于31-Na为中心的指示。
Production of very neutron-rich nuclei with a 76Ge beam
测量了132 MeV/u ~（76）Ge束分裂产生丰中子核的截面。采用一种新的变靶厚实验方法，对13 <= Z <= 27的34种丰中子同位素的纵向动量分布进行了扫描。用铍和钨靶测定了大量核的产生截面，其中包括首次观测到的15种同位素。这些是元素17 <= Z <= 25中最富中子的核素（50 Cl，53 Ar，55，56 K，57，58 Ca，59，60，61 Sc，62，63 Ti，65，66 V，68 Cr，70 Mn）。一个单体Qg系统学是用来描述生产截面的基础上从激发前碎片的热蒸发。一些靠近58 Ca的碎片显示出非常大的生产截面。
New isotope 44Si and systematics of the production cross sections of the most neutron-rich nuclei
本文介绍了142 MeV/u ~（48）Ca束分裂产生丰中子核的测量结果。在净中子拾取过程中，发现了一种新同位素的产生证据，这种同位素是中子最丰富的硅核素44 Si。一个简单的系统框架被发现来描述生产截面的基础上从激发prefragments，允许外推到其他弱反应产物的热蒸发。
The Single-Particle Structure of Neutron-Rich Nuclei of Astrophysical Interest at the Ornl Hribf
快速中子俘获过程（r过程）产生了大约一半比铁重的元素。然而，由于缺乏重要富中子核的核结构信息，产生的路径和丰度是不确定的。我们正在ORNL的Holifield放射性离子束设施（HRIBF）研究通过富中子放射性核束上的单核子转移反应在r过程路径上或附近的核。由于在逆运动学中研究这些反应的困难，正在开发各种实验方法。我们提出的实验方法和初步结果。
$β$ Decay Studies of Neutron-Rich Nuclei Near $^{52}$Ca
给出了$^{54}$ Sc、$^{50}$ K和$^{53}$ Ca的$β$衰变和同分异构性质，并讨论了它们与N=32子壳层封闭的关系.
The nuclear potential and resulting shell structure are well established for the valley of stability, however, dramatic modifications to the familiar ordering of single-particle orbitals in rare isotopes with a large imbalance of proton and neutron numbers have been found: new shell gaps emerge and conventional magic numbers are no longer valid. This article outlines some of the recent in-beam gamma-ray spectroscopy measurements at NSCL aimed at shedding light on the evolution of nuclear structure around neutron number N = 28 in neutron-rich Ar and S isotopes.
Measurement of the fusion cross-section for neutron-rich light nuclei is crucial in ascertaining if fusion of these nuclei occurs in the outer crust of a neutron star. We have therefore measured the fusion excitation function at near-barrier energies for the 19O + 12C system and compared the experimental results with the fusion excitation function of 18O + 12C and 16O + 12C. In the experiment a beam of 19O, produced via the 18O(d,p) reaction, was incident on a 12C target at energies near the Coulomb barrier. Evaporation residues produced in fusion of 18,19O ions with 12C target nuclei were det…
Production of medium-mass neutron-rich nuclei in reactions induced by 136Xe projectiles at 1 A GeV on a beryllium target
用GSI的FRS（Fragment Separator）装置测量了1AGeV 136MeV射弹碎裂产生的中等质量丰中子核的产生截面。125 Pd首次被发现。将测量的截面与238 U裂变产额和模型计算进行比较，以确定最佳反应机制，从而扩展N=82处r过程等待点周围核素图的限制。
High-spin transition quadrupole moments in neutron-rich Mo and Ru nuclei: testing $γ$ softness?
用多普勒频移衰减法测量了丰中子均匀质量$^{102-108}$ Mo和$^{108-112}$ Ru核在8 ~ 16 $\hbar $自旋范围内转动带的跃迁四极矩$Q_{t}$。原子核被填充为来自$^{252}$ Cf裂变的裂变碎片。检测器设置由γ射线光谱仪和HERCULES快速塑料阵列组成。在中等自旋下，发现$Q_{t}$矩相对于接近基态的值减小。试图在基于平均场的模型，特别是曲柄相对论哈特里-博戈留博夫理论中描述观测结果，说明了理论面临的挑战和从数据中推断$γ$柔软性和三轴性信息的困难。
Measurement of the fusion cross-section for neutron-rich light nuclei is crucial in ascertaining if fusion of these nuclei occurs in the outer crust of a neutron star. The fusion excitation function at near-barrier energies for the $^{19}$O + $^{12}$C system was measured and the experimental results are compared to the fusion excitation function of $^{18}$O + $^{12}$C and $^{16}$O + $^{12}$C. The experiment was performed by utilizing a beam of $^{19}$O, produced via the $^{18}$O(d,p) reaction, to bombard a $^{12}$C target at energies near the Coulomb barrier. Evaporation residues produced in f…
Production of new neutron-rich isotopes of heavy elements in fragmentation reactions of $^{238}$U projectiles at 1 A GeV
利用相对论能量的$^{238}$ U射弹的冷碎裂反应研究了重丰中子核的产生。在GSI的高分辨率磁谱仪FRS上进行的实验识别了45个新的重丰中子核：$^{205}$ Pt、$^{207-210}$ Au、$^{211-216}$ Hg、$^{213-217}$ Tl、$^{215-220}$ Pb、$^{219-224}$ Bi、$^{221-227}$ Po、$^{224-229}$ At，这些核的产生截面也被确定并用于基准反应代码，该基准反应代码预测远距离核的产生。从稳定。
Precision mass measurements of neutron-rich nuclei between N=50 and 82
在过去的五年里，由于Penning阱质量测量的引入，我们对丰中子核结合能的认识经历了一次重大的修订。裂变产生的近300种核素的新质量值已可获得，其不确定度为10千电子伏或更低。在Jyvaskyla，CERN-ISOLDE和Argonne的三个Penning陷阱设施产生的数据涵盖了从Ni到Pr的所有同位素链，但碘除外。在这次演讲中，一些这些数据进行了审查和应用，使用质量差，如两个中子结合能和奇偶交错探测其灵敏度的变化，原子核结构和强度的N=82壳间隙和相关的配对效应。
We report the first measurement of the fusion excitation functions for $^{39,47}$K + $^{28}$Si at near-barrier energies. Evaporation residues resulting from the fusion process were identified by direct measurement of their energy and time-of-flight with high geometric efficiency. At the lowest incident energy, the cross-section measured for the neutron-rich $^{47}$K induced reaction is ~6 times larger than that of the $β$-stable system. The experimental data are compared with both a dynamical deformation model and coupled channels calculations (CCFULL).
One-neutron removal reactions on neutron-rich psd-shell nuclei
本文对23个丰中子psd壳层核（Z=5-9，A=12-25）的高能单中子去除反应进行了系统的研究。给出了碳靶反应堆芯碎片的纵向动量分布和相应的单中子去除截面。扩展的Glauber模型计算，加权从壳模型计算得到的光谱因子，实验结果进行了比较。得出的结论是关于使用这样的反应作为一种光谱工具和自旋宇称分配建议为15 B，17 C，19- 21 N，21，23 O，23- 25 F。讨论了弱束缚系统14 B和15、17 C的性质。
Decay of proton-rich nuclei between 39Ti and 49Ni
在GANIL/LISE 3分离器上进行的抛射体碎裂实验中，对~（39）Ti ~（49）Ni的非常缺中子核进行了衰变研究。测量了~（39），~（40）Ti，~（42），~（43）Cr，~（46）Mn，~（45），~（46），~（47）Fe和~（49）Ni的半衰期和衰变谱。在少数情况下，伽马符合测量有助于成功地确定过渡的初始和最终状态。在这些情况下，提出了部分衰变方案。对于最奇特的同位素，39 Ti，42 Cr，45 Fe和49 Ni，它们是从基态开始的两质子放射性的候选者，在我们的光谱中没有看到这个过程的明确证据，我们得出的结论是延迟粒子衰变。
Improved Kelson-Garvey mass relations for proton-rich nuclei
从镜像核的质量差出发，提出了改进的Kelson-Garvey（ImKG）质量关系。用该关系式可以很好地再现31个实测丰质子核的质量，均方根偏差为0.398 MeV，远小于Kelson-Garvey质量关系式（0.502 MeV）和Isobar-Mirror质量关系式（0.647 MeV）。这是因为在预测未知富质子核的质量时，ImKG质量关系中涉及了更多的参与核的质量。用ImKG质量关系对144个具有$6\leq A\leq74$的未知丰质子核的质量进行了预测。同时研究了这些丰质子核的单质子和双质子分离能以及双质子发射。
Prominent bump in the two-neutron separation energies of neutron-rich lanthanum isotopes revealed by high-precision mass spectrometry
本文通过JYFLTRAP高精度质谱首次测定152,153La质量，发现富中子镧同位素双中子分离能在N=92至94处形成约0.4 MeV的显著凸起，不同于铈链的尖锐拐折，为核结构研究提供新线索。
A new inverse quasifission mechanism to produce neutron-rich transfermium nuclei
基于含时Hartree-Fock理论，提出了长轴形变锕系碰撞产生丰中子transmium核的一种新的逆准裂变机制。计算表明，一个原子核的尖端与另一个原子核的侧面碰撞会导致一个核子通量流向后者。讨论了核子蒸发和碰撞参量以及碰撞时间的作用。
Nuclear forces and their impact on neutron-rich nuclei and neutron-rich matter
我们审查的影响，核力的物质在中子丰富的极端。最近的结果表明，丰中子核对三核子力变得越来越敏感，这是基于量子色动力学的有效场论的理论发展的前沿。这包括壳层结构的形成，奇异核的光谱学，以及中子滴线的位置。核力也限制了富中子物质的性质，包括中子皮、对称能和中子星的结构。我们首先回顾我们对三核子力的理解，并说明手征有效场论如何对多体力作独特的预测。然后，我们调查了富中子氧和钙同位素以及富中子物质中的三核子力的结果，这些结果已经用一系列多体方法进行了探索。因此，三核子力在理论、实验和观测核物理学前沿之间提供了令人兴奋的联系。
Are there good probes for the di-neutron correlation in light neutron-rich nuclei?
双中子关联是一种空间关联，其中两个价中子位于原子核内的相似位置。我们讨论了双中子相关的可能的实验探针。这包括丰中子核的库仑破裂和对转移反应，以及中子滴线以外的核的直接双中子衰变。
A new method is proposed to deduce the neutron radii of neutron-rich nuclei. This method requires measuring the reaction cross sections of both the neutron-rich nucleus and its stable isotope at the same energy on a proton target. Using this method and the available experimental data of $^{12,22}$C + $p$ and $^{9,14}$Be + $p$ at 40$A$ MeV, the neutron radii of $^{22}$C and $^{14}$Be have been deduced for the first time.
Pairing and shell evolution in neutron rich nuclei
从质量奇偶错列的实验数据中，我们指出，中子对随中子数的变化在许多显著特征中起着重要作用，如新壳层闭合、壳层侵蚀、第一~（2+）态能量的异常降低和B ~+的缓慢增加等（E2，2_{+}^{1} \rightarrow 0_{+}^{1}）在不同质量区丰中子偶偶核中的分布。新的预测是以独立于模型的方式进行的。理论计算的结果支持唯象的发现。
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…
Insights into the equation of state of neutron rich matter obtained from the neutron skin thickness of 208Pb are in sharp conflict with earlier measurements of the electric dipole polarizability. We use a set of accurately calibrated energy density functionals to highlight the tension and to articulate how plans for a highly-intense Gamma Factory may alleviate the tension.
Background: Multi-nucleon transfer reactions have recently attracted attention as a possible path to the synthesis of new neutron-rich heavy nuclei. Purpose: We study transfer reactions involving massive nuclei with the intention of understanding if the semi-classical model GRAZING coupled to an evaporation and fission competition model can satisfactory reproduce experimental data on transfer reactions in which fission plays a role. Methods: We have taken the computer code GRAZING and have added fission competition to it (GRAZING-F) using our current understanding of $Γ_n/Γ_f$, fission barrier…
Equation of state of asymmetric nuclear matter and collisions of neutron-rich nuclei
本文研究了丰中子核碰撞产生的平衡前中子与质子的比值随它们的动能的变化。该比值对核对称能的密度依赖性敏感，但与对称核物质的可压缩性和介质中核子-核子截面无关。因此，该比值的实验测量为确定非对称核物质的核状态方程提供了一种新的手段。
Measurement and analysis of neutron capture reaction rates of light neutron-rich nuclei
在5 - 200 keV的天体物理相关能区测量了轻丰中子核的几个中子俘获截面。实验数据进行比较，使用直接捕获模型的计算。计算结果用于不稳定同位素的中子俘获截面的计算。此外，还讨论了能量低于E_n \approx 10 keV的中子源。
Momentum dependence of the symmetry potential and nuclear reactions induced by neutron-rich nuclei at RIA
利用动量和同位旋相关的输运模型，研究了富中子核在RIA能区引起的核反应中对称势的动量相关效应。研究发现，具有动量依赖性的对称势和不具有动量依赖性的对称势对应于相同的密度依赖性对称能$E_{sym}(ρ)$，导致对几个$E_{sym}(ρ)$敏感的实验观测值的预言明显不同.因此，动量依赖的对称性势是至关重要的，准确地调查状态方程（${\rm EOS}$）和致密的富中子物质在RIA的新特性。
Ground-state moments of inertia (MoI) are investigated for about 1700 even-even nuclei from the proton drip line to the neutron drip line up to $Z=120$ and $N=184$. The cranked Skyrme-Hartree-Fock-Bogoliubov equation is solved in the coordinate space. This model describes well the available experimental data of more than 300 nuclides possessing an appreciable deformation. I find that the MoI greatly increase near the drip line whereas the deformation is not as strong as estimated by the empirical relation. Systematic measurements of the excitation energy and the transition probability to the f…
We employ a variational method, in the framework of the Thomas-Fermi approximation, to study the effect of the symmetry energy on the neutron skin thickness and the symmetry energy coefficients of various neutron rich nuclei. We concentrate our interest on $^{208}$Pb, $^{124}$Sn, $^{90}$Zr, and $^{48}$Ca, although the method can be applied in the totality of medium and heavy neutron rich nuclei. Our approach has the advantage that the isospin asymmetry function $α(r)$, which is the key quantity to calculate isovector properties of various nuclei, is directly related with the symmetry energy as…
Rescattering effects in proton interaction with light neutron rich nuclei
在Glauber衍射理论的框架内，计算了70 ~ 1000 MeV/核子的中能p6 He，p8 Li和p9 Li弹性散射的微分截面.使用在现代清晰模型框架内获得的真实三体波函数α-n-n（6 He）、α-t-n（8 Li）和α-t-2 n（9 Li），并将Glauber算子扩展为一系列形式非常适合于三体核组态的多重散射，允许计算矩阵元，通过考虑来自指定原子核的所有结构成分的再散射。
The single particle and bulk properties of the neutron-rich nuclei constrain fundamental issues in nuclear physics and nuclear astrophysics like the limits of existence of quantum many body systems (atomic nuclei), the equation of state of neutron-rich matter, neutron star, nucleosynthesis, evolution of stars, neutron star merging etc.. The state of the art of Coulomb breakup of the neutron-rich nuclei has been used to explore those properties. Unambiguous information on detailed components of the ground-state wave-function along with quantum numbers of the valence neutron of the nuclei have b…
The dependence of fusion dynamics on neutron excess for light nuclei is extracted. This is accomplished by comparing the average fusion cross-section at energies just above the fusion barrier for $^{12-15}$C + $^{12}$C with measurements of the interaction cross-section from high evergy collisions. The experimental results indicate that the fusion cross-section associated with dynamics increases with increasing neutron excess. Calculations with a time-dependent Hartree-Fock model fail to describe the observed trend.
Neutron-rich nuclei and neutron skins from chiral low-resolution interactions
本文构建新型手征低分辨相互作用，精确描述从$^{16}$O到$^{208}$Pb的 bulk 性质，研究丰中子原子核的密度分布与中子皮，其对极端未探索核案例有敏感性。
We present a theoretical study of the Maris polarization effect and its application in quasi-free reactions to assess information on the structure of exotic nuclei. We discuss the uncertainties in the calculations of triple differential cross sections and of analyzing powers due the choices of various nucleon-nucleon interactions the optical potentials and limitations of the method. Our calculations explore a large number of choices for the nucleon-nucleon (NN) interactions and the optical potential for nucleon-nucleus scattering. Our study implies that polarization variables in (p,2p) reactio…
Interference effect of neutron capture cross section between the compound and direct processes is investigated. The compound process is calculated by resonance parameters and the direct process by the potential mode. The interference effect is tested for neutron-rich $^{82}$Ge and $^{134}$Sn nuclei relevant to $r$-process and light nucleus $^{13}$C which is neutron poison in the $s$-process and produces long-lived radioactive nucleus $^{14}$C ($T_{1/2}=5700$ y). The interference effects in those nuclei are significant around resonances, and low energy region if $s$-wave neutron direct capture …
With the development of radioactive beam facilities, studies concerning the shell evolution of unstable nuclei have recently gained prominence. Intruder components, particularly s-wave intrusion, in the low-lying states of light neutron-rich nuclei near N=8 are of importance in the study of shell evolution. The use of single-nucleon transfer reactions in inverse kinematics has been a sensitive tool that can be used to quantitatively investigate the single-particle orbital component of selectively populated states. The spin-parity, spectroscopic factor (or single-particle strength), and effecti…
Impact of spin-orbit currents on the electroweak skin of neutron-rich nuclei
背景资料：中子半径的测量为核密度泛函的等矢量部分提供了重要的约束，并在原子宇称破坏、重离子碰撞和中子星结构等不同领域提供了重要的指导。目的：评估自旋轨道电流对各种原子核的电磁半径和弱电荷半径的影响。特别强调的是放在实验上可访问的电弱皮肤，定义为弱电荷和电磁电荷半径之间的差异。研究方法：两个精确校准的相对论平均场模型被用来计算质子，中子，电荷和弱电荷半径的各种核。结果如下：我们发现，自旋轨道的贡献轻丰中子核，如22 O和48 Ca的电弱皮肤，是显着的，并导致电弱皮肤的大小相对于中子皮的大幅增加。结论：考虑到自旋-轨道对核的电荷和弱电荷半径的贡献通常与目前或预期的实验误差条一样大，未来的计算必须在计算电弱形状因子时纳入自旋-轨道电流。
Isobaric yield ratios in heavy-ion reactions, and symmetry energy of neutron-rich nuclei at intermediate energies
在修正的Fisher模型的框架下，分析了丰中子48 Ca和64 Ni弹丸碎裂产生的碎片的等压产额比。本文研究了Weiszäcker-Beth半经典质量公式中的能量系数（势能项asym、库仑能项ac和成对能项ap）与等压产额比（R）之间的关系，以及中子和质子化学势差（μn-μp）与R之间的关系。得到了（μn-μp）/T、ac/T、asym/T和ap/T（其中T是温度）与lnR之间的简单关系式。提出了利用中能重离子碰撞的同量异位素产额比，可以提取丰中子核的（μn-μp）/T、ac/T、asym/T和ap/T。
Deformation and its influence on $K$ isomerism in neutron-rich Hf nuclei
我们研究了形变对N=116附近Hf同位素中可能存在的长寿命$K$异构体的影响，使用势能面的构型约束计算。尽管具有减少的形状伸长，多准粒子状态在$^{186,188}$铪保持适度稳健对三轴变形，支持长期预期的异常长寿的异构体的发生。计算结果与现有的实验数据进行了比较。
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