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Extension of the Pt III Analysis 第 III 部分分析的扩展
IF 1.8 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-16 DOI: 10.3390/atoms11110148
Alexander Ryabtsev
Using a sliding spark and a 6.65 m normal incidence vacuum spectrograph, the third spectrum of platinum was analyzed. The transitions involving high-lying levels were studied. A total of 241 Pt III lines of the transitions from the levels of the 5d76p + 5d66s6p configurations in the region 728–2062 Å were classified, increasing the number of known Pt III lines to more than 1000. Ninety-one energy levels belonging mostly to the 5d66s6p configuration were added to Pt III. The odd Pt III levels were theoretically interpreted by means of multiconfiguration Dirak–Fock calculations and a least-squares fit of the calculated to the observed levels in the framework of the orthogonal parameters technique.
利用滑动火花和 6.65 米法线入射真空摄谱仪分析了铂的第三次光谱。对涉及高电平的跃迁进行了研究。在 728-2062 Å 区域内,从 5d76p + 5d66s6p 构型的能级跃迁中总共分类出 241 条铂 III 线,使已知的铂 III 线数量增加到 1000 多条。铂 III 中增加了 91 个主要属于 5d66s6p 构型的能级。通过多构型 Dirak-Fock 计算以及在正交参数技术框架内将计算结果与观测到的能级进行最小二乘拟合,对奇数 Pt III 能级进行了理论解释。
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引用次数: 0
The Vortex Surface in a Three-Body Quantum System 三体量子系统中的涡旋面
IF 1.8 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-15 DOI: 10.3390/atoms11110147
Tamara A. Guarda, Francisco Navarrete, Raúl O. Barrachina
Vortices are structures known in our daily lives and observed in a wide variety of systems, from cosmic to microscopic scales. Relatively recent studies showed that vortices could also appear in simple quantum systems. For instance, they were observed experimentally and theoretically as isolated zeros in the differential cross section in atomic ionization processes by the impact of charged particles. In this work, we show that the appearance of these quantum vortices as point structures was not due to any intrinsic property of them, but to the use of restrictive geometries in their visualization. In particular, we show that by studying the fully differential cross section for hydrogen ionization by positron impact, these vortex points are actually a manifestation of a more complex and hitherto unexplored structure, a 3D “vortex surface”.
旋涡是我们日常生活中已知的结构,在从宇宙到微观尺度的各种系统中都能观察到。最近的研究表明,旋涡也可以出现在简单的量子系统中。例如,在带电粒子的撞击下,原子电离过程中的微分截面上出现了孤立的零点,这就是实验和理论观测到的涡旋。在这项工作中,我们证明了这些量子漩涡作为点结构的出现并不是由于它们的任何固有属性,而是由于在它们的可视化中使用了限制性几何。我们特别指出,通过研究正电子撞击氢电离的全微分截面,我们发现这些涡旋点实际上是一种迄今为止尚未探索过的更复杂结构--三维 "涡旋面"--的表现形式。
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引用次数: 0
Pathways to the Local Thermodynamic Equilibrium of Complex Autoionizing States 通向复杂自电离状态局部热力学平衡的途径
IF 1.8 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-15 DOI: 10.3390/atoms11110146
F. Petitdemange, F. Rosmej
The generally accepted pathway to Local Thermodynamic Equilibrium (LTE) in atomic physics, where collision rates need to be much larger than radiative decay rates, is extended to complex autoionizing states. It is demonstrated that the inclusion of the non-radiative decay (autoionization rate) on the same footing, like radiative decay, i.e., the LTE criterion ne,crit×C≫A+Γ (ne,crit is the critical electron density above which LTE holds, C is the collisional rate coefficient, and A is the radiative decay rate) is inappropriate for estimating the related critical density. An analysis invoking simultaneously different atomic ionization stages identifies the LTE criteria as a theoretical limiting case, which provides orders of magnitude too high critical densities for almost all practical applications. We introduced a new criterion, where the critical densities are estimated from the non-autoionizing capture states rather than from the autoionizing states. The new criterion is more appropriate for complex autoionizing manifolds and provides order of magnitude reduced critical densities. Detailed numerical calculations are carried out for Na-like states of aluminum, where autoionization to the Ne-like ground and excited state occurrences are in excellent agreement with the new criterion. In addition, a complex multi-electron atomic-level structure and electron–electron correlation are identified as simplifying features rather than aggravating ones for the concept of thermalization.
原子物理学中普遍接受的局部热力学平衡(LTE)途径,即碰撞率必须远远大于辐射衰变率,被扩展到复杂的自电离状态。结果表明,将非辐射衰变(自电离率)与辐射衰变等量齐观,即 LTE 标准 ne,crit×C≫A+Γ(ne,crit 是超过 LTE 时的临界电子密度,C 是碰撞率系数,A 是辐射衰变率),并不适用于估算相关的临界密度。同时引用不同原子电离阶段的分析表明,LTE 标准是一种理论极限情况,它提供的临界密度数量级过高,几乎不适合所有实际应用。我们引入了一种新标准,即根据非自电离俘获态而不是自电离态来估算临界密度。新标准更适用于复杂的自电离流形,并能在数量级上降低临界密度。我们对铝的类氖态进行了详细的数值计算,发现铝的类氖基态和激发态的自电离现象与新标准非常吻合。此外,复杂的多电子原子级结构和电子-电子关联被认为是简化热化概念的特征,而不是使其恶化的特征。
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引用次数: 0
Guiding as a General Consequence of the Charged Particle Interaction with the Inner Surface of an Insulator Capillary—Guiding of 1 MeV Proton Microbeam through Polytetrafluoroethylene Macrocapillary 带电粒子与绝缘体毛细管内表面相互作用的一般导引结果--引导 1 MeV 质子微束通过聚四氟乙烯大毛细管
IF 1.8 Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-15 DOI: 10.3390/atoms11110145
K. Tőkési, I. Rajta, G. Nagy, R. J. Bereczky
The transmission of energetic, 1 MeV proton microbeam through a single, cylindrical shaped, macrometer-sized polytetrafluoroethylene capillary was studied experimentally. The capillary axis was tilted with respect to the axis of the incident ion beam. The tilting, the aspect ratio of the capillary and the small beam divergence disabled the geometrical transmission of the beam through the target. The intensity, energy, deflection and charge state of the transmitted beam were investigated. We found that the pure guided transmission of a MeV/amu energy ion beam is observable. We clearly identified three completely different stages during the guiding process according to the measured energy distribution of transmitted particles. At the beginning the transmission intensity was low and only inelastic contributions with energy lower than 1 MeV were found in the spectrum. Later, in the second stage, the elastic peak appeared and became more and more significant. Finally, when the stable transmission evolved, only the elastic peak was present and the inelastic area was totally absent as a direct consequence of the ion guiding and as a result of the charged particle interaction with a charged inner surface of the insulator capillary.
实验研究了高能 1 MeV 质子微束通过单个圆柱形、大米级聚四氟乙烯毛细管的传输情况。毛细管轴线相对于入射离子束轴线倾斜。毛细管的倾斜度、毛细管的长宽比和较小的光束发散使光束通过靶的几何传输失效。我们对传输光束的强度、能量、偏转和电荷状态进行了研究。我们发现,可以观察到 MeV/amu 能量离子束的纯引导传输。根据测量到的传输粒子能量分布,我们清楚地确定了引导过程中三个完全不同的阶段。一开始,传输强度较低,光谱中只发现能量低于 1 MeV 的非弹性贡献。后来,在第二阶段,出现了弹性峰值,并且越来越显著。最后,在稳定传输阶段,只有弹性峰出现,非弹性区域完全消失,这是离子导向的直接结果,也是带电粒子与绝缘体毛细管带电内表面相互作用的结果。
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引用次数: 0
Collisional Classical Dynamics at the Quantum Scale 量子尺度下的经典碰撞动力学
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-09 DOI: 10.3390/atoms11110144
Sebastian Otranto
During the past five decades, classical dynamics have been systematically used to gain insight on collision processes between charged particles and photons with atomic and molecular targets. These methods have proved to be efficient for systems in which numerical intensive quantum mechanical methods are not yet tractable. During the years, reaction cross sections for charge exchange and ionization have been scrutinized at the total and differential levels, leading to a clear understanding of the benefits and limitations inherent in a classical description. In this work, we present a review of the classical trajectory Monte Carlo method, its current status and the perspectives that can be envisaged for the near future.
在过去的五十年里,经典动力学已经被系统地用于了解带电粒子和光子与原子和分子目标之间的碰撞过程。这些方法已被证明是有效的系统中,数值密集量子力学方法尚不易于处理。多年来,电荷交换和电离的反应截面已经在总和微分水平上进行了仔细研究,从而清楚地了解了经典描述中固有的优点和局限性。在这项工作中,我们提出了经典轨迹蒙特卡罗方法的回顾,其现状和前景,可以设想为不久的将来。
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引用次数: 0
Correction: Cárdenas-Castillo, L.F.; Camacho-Guardian, A. Strongly Interacting Bose Polarons in Two-Dimensional Atomic Gases and Quantum Fluids of Polaritons. Atoms 2023, 11, 3 更正:Cárdenas-Castillo, L.F.;二维原子气体中的强相互作用玻色极化子和极化子的量子流体。原子2023,11,3
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-07 DOI: 10.3390/atoms11110143
Luis Fernando Cárdenas-Castillo, Arturo Camacho-Guardian
The authors wish to make the following corrections to their paper [...]
作者希望对他们的论文作以下更正[…]
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引用次数: 0
Study of Electron Impact Excitation of Na-like Kr Ion for Impurity Seeding Experiment in Large Helical Device 大型螺旋装置中na类Kr离子杂质播种实验的电子冲击激发研究
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-05 DOI: 10.3390/atoms11110142
Shivam Gupta, Tetsutarou Oishi, Izumi Murakami
In this work, a krypton gas impurity seeding experiment was conducted in a Large Helical Device. Emission lines from the Na-like Kr ion in the extreme ultraviolet wavelength region, such as 22.00 nm, 17.89 nm, 16.51 nm, 15.99 nm, and 14.08 nm, respective to 2p63p(2P1/2o)−2p63s(2S1/2), 2p63p(2P3/2o)−2p63s(2S1/2), 2p63d(2D3/2)−2p63p(2P3/2o), 2p63d(2D5/2)−2p63p(2P3/2o), and 2p63d(2D3/2)−2p63p(2P1/2o) transitions, are observed. In order to generate a theoretical synthetic spectrum, an extensive calculation concerning the excitation of the Kr25+ ion through electron impact was performed for the development of a suitable plasma model. For this, the relativistic multiconfiguration Dirac–Hartree–Fock method was employed along with its extension to the relativistic configuration interaction method to compute the relativistic bound-state wave functions and excitation energies of the fine structure levels using the General Relativistic Atomic Structure Package-2018. In addition, another set of calculations was carried out utilizing the relativistic many-body perturbation theory and relativistic configuration interaction methods integrated within the Flexible Atomic Code. To investigate the reliability of our findings, the results of excitation energies, transition probabilities, and weighted oscillator strengths of different dipole-allowed transitions obtained from these different methods are presented and compared with the available data. Further, the detailed electron impact excitation cross-sections and their respective rate coefficients are obtained for various fine structure resolved transitions using the fully relativistic distorted wave method. Rate coefficients, calculated using the Flexible Atomic Code for population and de-population kinetic processes, are integrated into the collisional-radiative plasma model to generate a theoretical spectrum. Further, the emission lines observed from the Kr25+ ion in the impurity seeding experiment were compared with the present plasma model spectrum, demonstrating a noteworthy overall agreement between the measurement and the theoretical synthetic spectrum.
本文在大型螺旋装置中进行了氪气杂质播种实验。在2p63p(2P1/2o)−2p63s(2S1/2)、2p63p(2P3/2o)−2p63s(2S1/2)、2p63d(2D3/2)−2p63p(2P3/2o)、2p63d(2D5/2)−2p63p(2P3/2o)、2p63d(2D3/2)−2p63p(2P3/2o)、2p63d(2D3/2)−2p63p(2P3/2o)、2p63d(2D3/2)−2p63p(2P3/2o)和2p63d(2D3/2)−2p63p(2P1/2o)的极紫外波段,分别观测到na - Kr离子在22.00 nm、17.89 nm、16.51 nm、15.99 nm和14.08 nm的发射谱线。为了生成理论合成谱,对Kr25+离子通过电子冲击激发进行了广泛的计算,以建立合适的等离子体模型。为此,利用广义相对论原子结构包-2018,采用相对论多组态Dirac-Hartree-Fock方法及其对相对论组态相互作用方法的扩展,计算了精细结构能级的相对论束缚态波函数和激发能。此外,利用柔性原子代码中集成的相对论多体微扰理论和相对论组态相互作用方法进行了另一组计算。为了研究我们发现的可靠性,我们给出了用这些不同方法得到的不同偶极允许跃迁的激发能、跃迁概率和加权振子强度的结果,并与现有数据进行了比较。利用完全相对论畸变波方法,得到了各种精细结构分辨跃迁的详细电子冲击激发截面和各自的速率系数。利用柔性原子代码计算的居群和去居群动力学过程的速率系数,被整合到碰撞-辐射等离子体模型中,以产生理论谱。此外,将Kr25+离子在杂质播种实验中观测到的发射谱线与目前的等离子体模型谱线进行了比较,结果表明,测量结果与理论合成谱线总体上是一致的。
{"title":"Study of Electron Impact Excitation of Na-like Kr Ion for Impurity Seeding Experiment in Large Helical Device","authors":"Shivam Gupta, Tetsutarou Oishi, Izumi Murakami","doi":"10.3390/atoms11110142","DOIUrl":"https://doi.org/10.3390/atoms11110142","url":null,"abstract":"In this work, a krypton gas impurity seeding experiment was conducted in a Large Helical Device. Emission lines from the Na-like Kr ion in the extreme ultraviolet wavelength region, such as 22.00 nm, 17.89 nm, 16.51 nm, 15.99 nm, and 14.08 nm, respective to 2p63p(2P1/2o)−2p63s(2S1/2), 2p63p(2P3/2o)−2p63s(2S1/2), 2p63d(2D3/2)−2p63p(2P3/2o), 2p63d(2D5/2)−2p63p(2P3/2o), and 2p63d(2D3/2)−2p63p(2P1/2o) transitions, are observed. In order to generate a theoretical synthetic spectrum, an extensive calculation concerning the excitation of the Kr25+ ion through electron impact was performed for the development of a suitable plasma model. For this, the relativistic multiconfiguration Dirac–Hartree–Fock method was employed along with its extension to the relativistic configuration interaction method to compute the relativistic bound-state wave functions and excitation energies of the fine structure levels using the General Relativistic Atomic Structure Package-2018. In addition, another set of calculations was carried out utilizing the relativistic many-body perturbation theory and relativistic configuration interaction methods integrated within the Flexible Atomic Code. To investigate the reliability of our findings, the results of excitation energies, transition probabilities, and weighted oscillator strengths of different dipole-allowed transitions obtained from these different methods are presented and compared with the available data. Further, the detailed electron impact excitation cross-sections and their respective rate coefficients are obtained for various fine structure resolved transitions using the fully relativistic distorted wave method. Rate coefficients, calculated using the Flexible Atomic Code for population and de-population kinetic processes, are integrated into the collisional-radiative plasma model to generate a theoretical spectrum. Further, the emission lines observed from the Kr25+ ion in the impurity seeding experiment were compared with the present plasma model spectrum, demonstrating a noteworthy overall agreement between the measurement and the theoretical synthetic spectrum.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135725133","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
Effects of Spiralling Trajectories on White Dwarf Spectra: High Rydberg States 螺旋轨迹对白矮星光谱的影响:高里德伯态
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-11-01 DOI: 10.3390/atoms11110141
Spiros Alexiou
It has been recently suggested that white dwarf diagnostics could be in error and should be revised because of the effect of the magnetic field on spiralling trajectories of the plasma particles (mainly electrons), predicting a dramatic width increase for high densities of Balmer-β and especially for the δ and ϵ lines. These suggestions overlook important physics and are shown here to be incorrect. Specifically, exact calculations are carried out that can assess the importance of various physical effects neglected in the erroneous analysis mentioned. The net result of accounting for spiralling electron trajectories is typically a small to modest reduction in the line widths, at least for the parameters considered.
最近有人提出,由于磁场对等离子体粒子(主要是电子)的螺旋轨迹的影响,白矮星诊断可能是错误的,应该进行修正,预测高密度的Balmer-β,特别是δ和λ线的宽度会急剧增加。这些建议忽略了重要的物理性质,在这里证明是不正确的。具体地说,进行了精确的计算,可以评估在上述错误分析中被忽略的各种物理效应的重要性。考虑螺旋电子轨迹的最终结果通常是线宽的一个小到适度的减小,至少对于所考虑的参数来说是这样。
{"title":"Effects of Spiralling Trajectories on White Dwarf Spectra: High Rydberg States","authors":"Spiros Alexiou","doi":"10.3390/atoms11110141","DOIUrl":"https://doi.org/10.3390/atoms11110141","url":null,"abstract":"It has been recently suggested that white dwarf diagnostics could be in error and should be revised because of the effect of the magnetic field on spiralling trajectories of the plasma particles (mainly electrons), predicting a dramatic width increase for high densities of Balmer-β and especially for the δ and ϵ lines. These suggestions overlook important physics and are shown here to be incorrect. Specifically, exact calculations are carried out that can assess the importance of various physical effects neglected in the erroneous analysis mentioned. The net result of accounting for spiralling electron trajectories is typically a small to modest reduction in the line widths, at least for the parameters considered.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":"51 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135325848","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
Isomers in the Cosmos 宇宙中的异构体
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-10-26 DOI: 10.3390/atoms11110140
Eric B. Norman
The nucleosynthesis of chemical elements has been established to be the result of a variety of different types of nuclear reactions in stars. Under the extreme temperatures and densities encountered in such environments, nuclear isomers can be populated and thus complicate our understanding of these processes. In this paper, I have chosen to discuss five cases that illustrate how nuclear isomers can play important roles in the nucleosynthesis of chemical elements.
化学元素的核合成已经确定是恒星中各种不同类型的核反应的结果。在这种环境中遇到的极端温度和密度下,核异构体可以被填充,从而使我们对这些过程的理解复杂化。在本文中,我选择讨论五个例子来说明核异构体如何在化学元素的核合成中发挥重要作用。
{"title":"Isomers in the Cosmos","authors":"Eric B. Norman","doi":"10.3390/atoms11110140","DOIUrl":"https://doi.org/10.3390/atoms11110140","url":null,"abstract":"The nucleosynthesis of chemical elements has been established to be the result of a variety of different types of nuclear reactions in stars. Under the extreme temperatures and densities encountered in such environments, nuclear isomers can be populated and thus complicate our understanding of these processes. In this paper, I have chosen to discuss five cases that illustrate how nuclear isomers can play important roles in the nucleosynthesis of chemical elements.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135013354","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
A Radio-Frequency Ion Trap System for the Multi-Reflection Time-of-Flight Mass Spectrometer at SHANS and Its Offline Commissioning 中科院多反射飞行时间质谱仪射频离子阱系统及其离线调试
Q3 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL Pub Date : 2023-10-26 DOI: 10.3390/atoms11110139
Jun-Ying Wang, Wen-Xue Huang, Yu-Lin Tian, Yong-Sheng Wang, Yue Wang, Wan-Li Zhang, Yuan-Jun Huang, Zai-Guo Gan, Hu-Shan Xu
To precisely measure atomic masses and select neutron-deficient isotopes produced by fusion evaporation reactions, an MRTOF-MS (multi-reflection time-of-flight mass spectrometer) at the SHANS (Spectrometer for Heavy Atom and Nuclear Structure) is being developed. One of the key parts, an RF ion trap system with the aim to provide brilliant ion pulses with a low energy spread and narrow pulse width for ion preparation prior to injection into the MRTOF mass analyzer, has been constructed and commissioned offline successfully. The principle, construction details and test results are reported. Pulsed beams of 39K1+, 85,87Rb1+ and 133Cs1+ ions have been tested and the amplitudes and frequencies of the RF signals, DC voltages, helium gas pressure and time parameters have been scanned. The corresponding time spreads have reached 0.252 µs, 0.394 µs and 0.450 µs, respectively.
为了精确测量原子质量和选择由聚变蒸发反应产生的中子缺陷同位素,正在开发一种MRTOF-MS(多反射飞行时间质谱仪)在SHANS(重原子和核结构光谱仪)。其中一个关键部分是射频离子阱系统,该系统旨在为注入MRTOF质谱分析仪之前的离子制备提供低能量扩散和窄脉冲宽度的明亮离子脉冲,并已成功构建并离线调试。介绍了该方法的原理、施工细节和试验结果。对39K1+、85、87Rb1+和133Cs1+离子的脉冲光束进行了测试,并对射频信号的幅值和频率、直流电压、氦气压力和时间参数进行了扫描。相应的时间差分别达到0.252µs、0.394µs和0.450µs。
{"title":"A Radio-Frequency Ion Trap System for the Multi-Reflection Time-of-Flight Mass Spectrometer at SHANS and Its Offline Commissioning","authors":"Jun-Ying Wang, Wen-Xue Huang, Yu-Lin Tian, Yong-Sheng Wang, Yue Wang, Wan-Li Zhang, Yuan-Jun Huang, Zai-Guo Gan, Hu-Shan Xu","doi":"10.3390/atoms11110139","DOIUrl":"https://doi.org/10.3390/atoms11110139","url":null,"abstract":"To precisely measure atomic masses and select neutron-deficient isotopes produced by fusion evaporation reactions, an MRTOF-MS (multi-reflection time-of-flight mass spectrometer) at the SHANS (Spectrometer for Heavy Atom and Nuclear Structure) is being developed. One of the key parts, an RF ion trap system with the aim to provide brilliant ion pulses with a low energy spread and narrow pulse width for ion preparation prior to injection into the MRTOF mass analyzer, has been constructed and commissioned offline successfully. The principle, construction details and test results are reported. Pulsed beams of 39K1+, 85,87Rb1+ and 133Cs1+ ions have been tested and the amplitudes and frequencies of the RF signals, DC voltages, helium gas pressure and time parameters have been scanned. The corresponding time spreads have reached 0.252 µs, 0.394 µs and 0.450 µs, respectively.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":"23 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136381882","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
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Atoms
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