Atoms最新文献_第10页

Projectile Coherence Effects in Twisted Electron Ionization of Helium 氦扭曲电子电离中的抛射相干效应

IF 1.8

Atoms Pub Date : 2023-05-03 DOI: 10.3390/atoms11050079

A. Harris

{"title":"Projectile Coherence Effects in Twisted Electron Ionization of Helium","authors":"A. Harris","doi":"10.3390/atoms11050079","DOIUrl":"https://doi.org/10.3390/atoms11050079","url":null,"abstract":"Over the last decade, it has become clear that for heavy ion projectiles, the projectile’s transverse coherence length must be considered in theoretical models. While traditional scattering theory often assumes that the projectile has an infinite coherence length, many studies have demonstrated that the effect of projectile coherence cannot be ignored, even when the projectile-target interaction is within the perturbative regime. This has led to a surge in studies that examine the effects of the projectile’s coherence length. Heavy-ion collisions are particularly well-suited to this because the projectile’s momentum can be large, leading to a small deBroglie wavelength. In contrast, electron projectiles that have larger deBroglie wavelengths and coherence effects can usually be safely ignored. However, the recent demonstration of sculpted electron wave packets opens the door to studying projectile coherence effects in electron-impact collisions. We report here theoretical triple differential cross-sections (TDCSs) for the electron-impact ionization of helium using Bessel and Laguerre-Gauss projectiles. We show that the projectile’s transverse coherence length affects the shape and magnitude of the TDCSs and that the atomic target’s position within the projectile beam plays a significant role in the probability of ionization. We also demonstrate that projectiles with large coherence lengths result in cross-sections that more closely resemble their fully coherent counterparts.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45786518","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: 1

Enhanced Acetone Sensing Based on Group-11 Metal (Cu, Ag, and Au) Nanoparticles Embedded in Graphitic Carbon Nitride (gCN) 基于嵌入石墨氮化碳（gCN）的11族金属（Cu、Ag和Au）纳米粒子的增强丙酮传感

IF 1.8

Atoms Pub Date : 2023-05-01 DOI: 10.3390/atoms11050078

Nihal, R. Sharma, Navjot Kaur, Mamta Sharma, B. Choudhary, J. Goswamy

引用次数: 0

Fragmentation Dynamics of CO2q+ (q = 2, 3) in Collisions with 1 MeV Proton CO2q+（q=2，3）与1MeV质子碰撞的碎裂动力学

IF 1.8

Atoms Pub Date : 2023-04-23 DOI: 10.3390/atoms11050075

Avijit Duley, A. Kelkar

引用次数: 0

Theoretical Investigation of Electron–Ion Recombination Process of Mg-like Gold 类镁金电子-离子复合过程的理论研究

IF 1.8

Atoms Pub Date : 2023-04-23 DOI: 10.3390/atoms11050076

L. Xie, Wenliang He, Shengbo Niu, J. Rui, Yulong Ma, C. Dong

引用次数: 0

Signatures of Quantum Chaos of Rydberg-Dressed Bosons in a Triple-Well Potential 三阱势中rydberg修饰玻色子的量子混沌特征

IF 1.8

Atoms Pub Date : 2023-04-19 DOI: 10.3390/atoms11060089

T. Yan, M. Collins, R. Nath, Weibin Li

引用次数: 1

Rydberg Interaction-Induced Distortion of the Autler–Townes Spectra in Cold Lithium Atoms 冷锂原子中奥德勒-汤光谱的Rydberg相互作用诱导畸变

IF 1.8

Atoms Pub Date : 2023-04-13 DOI: 10.3390/atoms11040073

S. Saakyan, N. Morozov, V. Sautenkov, B. Zelener

引用次数: 1

Temporal Response of Atoms Trapped in an Optical Dipole Trap: A Primer on Quantum Computing Speed 被困在光偶极子阱中的原子的时间响应:量子计算速度入门

IF 1.8

Atoms Pub Date : 2023-04-10 DOI: 10.3390/atoms11040072

S. Baral, R. Easwaran, J. José, Aarthi Ganesan, P. Deshmukh

引用次数: 0

Indigenisation of the Quantum Clock: An Indispensable Tool for Modern Technologies 量子钟的本土化：现代技术不可或缺的工具

IF 1.8

Atoms Pub Date : 2023-04-10 DOI: 10.3390/atoms11040071

S. De, Arijit Sharma

{"title":"Indigenisation of the Quantum Clock: An Indispensable Tool for Modern Technologies","authors":"S. De, Arijit Sharma","doi":"10.3390/atoms11040071","DOIUrl":"https://doi.org/10.3390/atoms11040071","url":null,"abstract":"Time and frequency (T&F) measurement with unprecedented accuracy is the backbone for several sophisticated technologies, commensurate with the evolution of human civilisation in the 20th century in terms of communication, positioning, navigation, and precision timing. This necessity drove researchers in the early 1950s to build atomic clocks that have now evolved to a state-of-the-art level, operating at optical wavelengths as optical atomic clocks, which use cold and trapped samples of atomic/ionic species and various other sophisticated diagnostic test techniques. Such ultrahigh-precision accurate clocks have made it possible to probe fundamental aspects of science through incredibly sensitive measurements. On the other hand, they meet the T&F synchronisation standards for classical and emerging quantum technologies at the desired level of accuracy. Considering the impact of optical atomic clocks in the second quantum revolution (quantum 2.0), they have been identified as an indispensable critical technology in worldwide quantum missions, including in India. This article reviews the present international scenario regarding optical atomic clocks and their related technologies and draws a roadmap for their indigenisation over the next decade.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46672806","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: 1

Fine-Tuning of Atomic Energies in Relativistic Multiconfiguration Calculations 相对论多重组态计算中原子能的精细调谐

IF 1.8

Atoms Pub Date : 2023-04-08 DOI: 10.3390/atoms11040070

Yanting Li, G. Gaigalas, Wenxian Li, Chongyang Chen, P. Jönsson

{"title":"Fine-Tuning of Atomic Energies in Relativistic Multiconfiguration Calculations","authors":"Yanting Li, G. Gaigalas, Wenxian Li, Chongyang Chen, P. Jönsson","doi":"10.3390/atoms11040070","DOIUrl":"https://doi.org/10.3390/atoms11040070","url":null,"abstract":"Ab initio calculations sometimes do not reproduce the experimentally observed energy separations at a high enough accuracy. Fine-tuning of diagonal elements of the Hamiltonian matrix is a process which seeks to ensure that calculated energy separations of the states that mix are in agreement with experiment. The process gives more accurate measures of the mixing than can be obtained in ab initio calculations. Fine-tuning requires the Hamiltonian matrix to be diagonally dominant, which is generally not the case for calculations based on jj-coupled configuration state functions. We show that this problem can be circumvented by a method that transforms the Hamiltonian in jj-coupling to a Hamiltonian in LSJ-coupling for which fine-tuning applies. The fine-tuned matrix is then transformed back to a Hamiltonian in jj-coupling. The implementation of the method into the General Relativistic Atomic Structure Package is described and test runs to validate the program operations are reported. The new method is applied to the computation of the 2s21S0−2s2p1,3P1 transitions in C III and to the computation of Rydberg transitions in B I, for which the 2s2p22S1/2 perturber enters the 2s2ns2S1/2 series. Improved convergence patterns and results are found compared with ab initio calculations.","PeriodicalId":8629,"journal":{"name":"Atoms","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44754334","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: 1

Resonance States of Negative Hydrogen-like Ions in Quantum Plasmas 负类氢离子在量子等离子体中的共振态

IF 1.8

Atoms Pub Date : 2023-04-07 DOI: 10.3390/atoms11040069

Suya Yao, Zishi Jiang, S. Kar

引用次数: 0