Journal of Electron Spectroscopy and Related Phenomena最新文献_第6页

Effect of L-shell spectator vacancies on the competition of filling the K, L1 and L23 vacancies and the natural widths of K-shell hole states of argon ions l壳旁观空位对K、L1和L23空位填充竞争及氩离子K壳空穴态自然宽度的影响

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-10-01 DOI: 10.1016/j.elspec.2023.147395

Xiangli Wang , Lan Yang , Baixing Liu , Guoheng Zhang , Xiaoyong Li , Cairang LiMao

{"title":"Effect of L-shell spectator vacancies on the competition of filling the K, L1 and L23 vacancies and the natural widths of K-shell hole states of argon ions","authors":"Xiangli Wang , Lan Yang , Baixing Liu , Guoheng Zhang , Xiaoyong Li , Cairang LiMao","doi":"10.1016/j.elspec.2023.147395","DOIUrl":"https://doi.org/10.1016/j.elspec.2023.147395","url":null,"abstract":"<div>The radiative and Auger decay of K-shell hole states of argon ions with configuration 1s2sm2pn3 s23p6 (m=0–2; n = 0–6) are studied theoretically using the flexible atomic code. The effect of L-shell spectator vacancies on the competition of filling the K, L1, and L23 vacancies is discussed for the first time. We find the K or L1 vacancy is preferred to be filled first when there is 0 or 1 vacancy in the L23 shell, but the L23 vacancy becomes the priority when the number of the L23 vacancies is larger than 2, and the total branching ratio of the L23 vacancy is as high as 66.98%, 74.66%, and 80.95% when the L23 shell has 4 vacancies and there are 2, 1 and 0 vacancies in the L1 shell, respectively. In addition, the natural widths of the K, L1, and L23 vacancies with different L-shell vacancy distributions are also calculated. The results show that they all first increase and then decrease with the number of L23 vacancies. It is expected that the present study will be useful for the qualitative analysis of the decay processes of multiple hole states, the understanding of ion yields and the production of satellites in x-ray and Auger spectra.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"268 ","pages":"Article 147395"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49901089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of a static electric field on magnetic materials monitored by X-ray magnetic circular dichroism 静电场对x射线磁圆二色性监测的磁性材料的影响

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-10-01 DOI: 10.1016/j.elspec.2023.147386

H. Ebert , S. Mankovsky , A. Marmodoro , E. Simon

{"title":"Influence of a static electric field on magnetic materials monitored by X-ray magnetic circular dichroism","authors":"H. Ebert , S. Mankovsky , A. Marmodoro , E. Simon","doi":"10.1016/j.elspec.2023.147386","DOIUrl":"https://doi.org/10.1016/j.elspec.2023.147386","url":null,"abstract":"<div>The magnetic circular X-ray dichroism (XMCD) in X-ray absorption spectroscopy (XAS) is extensively used to monitor the response of a magnetic system to an external perturbation. Application of a static external electric field to control its magnetic properties may just lead to a charge rearrangement or to a steady electric current dependent on the geometry. As it is demonstrated, the first situation can be handled with minor modifications of the standard well established schemes to calculate XAS and XMCD spectra. For the second case, however, more advanced schemes have to be used that account for the steady-state out-of-equilibrium situation. It is shown, that this can indeed be achieved by making use of the Keldysh non-equilibrium Green function formalism that allows in particular to express the X-ray absorption coefficient in terms of the corresponding greater Green function <math><mrow><msup><mrow><mi>G</mi></mrow><mrow><mo>></mo></mrow></msup><mrow><mo>(</mo><mi>E</mi><mo>)</mo></mrow></mrow></math>. As an alternative approach, a bi-linear response formalism is presented that can be used to calculate the modification of the XMCD spectra due to the electric field directly.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"268 ","pages":"Article 147386"},"PeriodicalIF":1.9,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49901088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A quantitative evaluation of the 2nd derivative mode in electron energy loss spectroscopy 电子能量损失谱中二阶导数模式的定量评价

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-10-01 DOI: 10.1016/j.elspec.2023.147387

J.G. Tobin

引用次数: 0

EXAFS study of the local environment of lead and iron sorbed onto volcanic ash 火山灰吸附铅和铁的局部环境EXAFS研究

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147379

Bridinette Thiodjio Sendja , Duclair Tchana Kamgne , Rene Loredo Portales , Giuliana Aquilanti

{"title":"EXAFS study of the local environment of lead and iron sorbed onto volcanic ash","authors":"Bridinette Thiodjio Sendja , Duclair Tchana Kamgne , Rene Loredo Portales , Giuliana Aquilanti","doi":"10.1016/j.elspec.2023.147379","DOIUrl":"10.1016/j.elspec.2023.147379","url":null,"abstract":"<div>This work focuses on the EXAFS investigation of the local environment of lead and iron sorbed onto volcanic ash materials previously studied using XANES technique. Different compounds found in the composition of volcanic ash were used as the models in the EXAFS fitting procedure of the experimental EXAFS spectra collected at the Fe K edge and Pb L3 edge in the Fe- and Pb-sorbed volcanic ash samples. The results showed two types of interactions involving in the adsorption process of both samples. The first is related to iron or lead absorber with oxygen atoms in the first coordination shell. The second interaction occurred between the absorbers (Fe or Pb) and the backscatters (Fe or Pb) in the second shell. The local environment of the iron-sorbed element may have a cubic geometry with different crystallographic sites related to oxygen and iron atoms. On the other hand, the lead-sorbed element may be in orthorhombic geometry with different sites related to oxygen atoms and lead atoms. The adsorption mechanisms involved in the process of iron and lead sorption are ion exchange with probable chemisorption for iron and microprecipitation for lead.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"267 ","pages":"Article 147379"},"PeriodicalIF":1.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49327745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Making chemical sense of phase in soft X-ray spectroptychography 软X射线光谱成像中相位的化学意义

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147367

Joseph Stitsky , Jian Wang , Stephen Urquhart

引用次数: 0

Soft X-ray microspectroscopic imaging studies of exfoliated surface between fluoropolymer and Cu plate directly bonded by plasma irradiation with ammonia gas 氨气等离子体辐照直接键合含氟聚合物与铜板剥离表面的软x射线显微成像研究

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147385

A. Yamaguchi , S. Ikeda , M. Nakaya , Y. Kobayashi , Y. Haruyama , S. Suzuki , K. Kanda , Y. Utsumi , T. Ohkochi , H. Sumida , M. Oura

{"title":"Soft X-ray microspectroscopic imaging studies of exfoliated surface between fluoropolymer and Cu plate directly bonded by plasma irradiation with ammonia gas","authors":"A. Yamaguchi , S. Ikeda , M. Nakaya , Y. Kobayashi , Y. Haruyama , S. Suzuki , K. Kanda , Y. Utsumi , T. Ohkochi , H. Sumida , M. Oura","doi":"10.1016/j.elspec.2023.147385","DOIUrl":"10.1016/j.elspec.2023.147385","url":null,"abstract":"<div>The F, C, O, and N elemental distribution maps at the exfoliated surfaces of Cu plate after peeling the fluoropolymers from Fluorinated ethylene propylene (FEP)/Cu and Perfluoroalkoxyalkane (PFA)/Cu pieces which were bonded by plasma treatment including amino acid were performed by microscopic synchrotron radiation (SR)　spectroscopic imaging measurements. The spatial elemental distribution pattern of exfoliated Cu after peeling PFA/Cu piece was not detectable by scanning electron microscopy with energy dispersive X-ray spectroscopy imaging alone, was revealed by SR-based soft X-ray microspectroscopy. We also obtained the microprobe X-ray fluorescence spectra and microprobe near-edge X-ray absorption fine structure spectra. Based on these measurement results, it is considered that the delamination of FEP/Cu piece mainly caused by resin failure, while the delamination of PFA/Cu is caused by interfacial delamination in addition to resin failure. The Hard X-ray photoelectron spectroscopy was also performed to confirm that the bonding via nitrogen is formed. Our SR-based analyses provided confirmation that fluoropolymers and Cu plates are bonded by N-mediated chemical bonding. The present study insists that the technique and plasma bonding process reported are expected to contribute to the development of new devices and systems consisting of fluoropolymers and metals.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"267 ","pages":"Article 147385"},"PeriodicalIF":1.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47542453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative mapping of calcium cell reservoirs in cyanobacteria at the submicrometer scale 亚微米级蓝藻钙细胞库的定量图谱

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147369

Benzerara Karim , Görgen Sigrid , Khan Monis Athar , Chauvat Franck , March Katia , Menguy Nicolas , Mehta Neha , Skouri-Panet Fériel , Swaraj Sufal , Travert Cynthia , Cassier-Chauvat Corinne , Duprat Elodie

{"title":"Quantitative mapping of calcium cell reservoirs in cyanobacteria at the submicrometer scale","authors":"Benzerara Karim , Görgen Sigrid , Khan Monis Athar , Chauvat Franck , March Katia , Menguy Nicolas , Mehta Neha , Skouri-Panet Fériel , Swaraj Sufal , Travert Cynthia , Cassier-Chauvat Corinne , Duprat Elodie","doi":"10.1016/j.elspec.2023.147369","DOIUrl":"10.1016/j.elspec.2023.147369","url":null,"abstract":"<div>Calcium plays an important role in the physiology of bacterial cells and as a free soluble form inside the cells, it is tightly regulated at a low concentration. However, much higher amounts of stored calcium exist within cells and can be remobilized at diverse occasions. As a consequence, there has been a variety of techniques developed to quantitatively map the different forms of Ca in cells. Here we show how scanning transmission x-ray microscopy (STXM), a synchrotron-based microscopy technique, conducted in the soft x-ray range at the Ca L2,3 edges (340–360 eV) offers an original and informative quantitative view of different Ca reservoirs in bacterial cells at a spatial resolution better than 100 nm. To illustrate this, we analyzed mutants of the cyanobacterium Synechococcus elongatus PCC 7942, overexpressing different versions of a gene called ccyA from two phylogenetically distant cyanobacteria: Gloeomargarita lithophora and Synechococcus sp. PCC 6312. This gene is diagnostic of the capability of some cyanobacteria to form intracellular amorphous calcium carbonate (iACC) but its function remains unknown. Here we show that the overexpression of the ccyA gene in the iACC non-forming cyanobacterium S. elongatus PCC 7942 results in an increased Ca content, especially in some Ca-rich cells. Moreover, we show that STXM can discriminate four different reservoirs of Ca in cyanobacteria and provides quantitative assessment of their relative importance.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"267 ","pages":"Article 147369"},"PeriodicalIF":1.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42195349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Dissociative electron attachment to 1- and 9-chloroanthracene in the gas phase 气相中1-和9-氯蒽的离解电子附着

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147383

Nail L. Asfandiarov, Mars V. Muftakhov, Stanislav A. Pshenichnyuk

{"title":"Dissociative electron attachment to 1- and 9-chloroanthracene in the gas phase","authors":"Nail L. Asfandiarov, Mars V. Muftakhov, Stanislav A. Pshenichnyuk","doi":"10.1016/j.elspec.2023.147383","DOIUrl":"10.1016/j.elspec.2023.147383","url":null,"abstract":"<div>Dissociative electron attachment (DEA) to 1-chloroanthracene and 9-chloroanthracene was investigated under gas-phase conditions. In both compounds, the elimination of the chlorine anion is the dominant channel for the dissociation of molecular negative ions (NIs). The second most intense channel leads to the formation of molecular anions (Mˉ). The autodetachment lifetime of Mˉ was measured to be about 170 μs for both compounds. The widths of the Mˉ peaks indicate that molecular anions are formed via two resonances: at thermal electron energies and through a shape resonance at the energy of ∼0.5 eV. Adiabatic electron affinities were estimated in the framework of the simple Arrhenius model to be 0.86 eV for both molecules, the values being close to the theoretical predictions by DFT method of 0.90 eV and 0.93 eV for 1-chloroanthracene and 9-chloroanthracene respectively. Metastable negative ions are observed in the DEA spectra of both molecules, which testifies that the elimination of chlorine anions from molecular NIs appears on a time scale of several microseconds.</div>","PeriodicalId":15726,"journal":{"name":"Journal of Electron Spectroscopy and Related Phenomena","volume":"267 ","pages":"Article 147383"},"PeriodicalIF":1.9,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45428776","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Soft X-rays radiation damage on plunge-frozen and freeze-dried maize roots evaluated by FTIR spectromicroscopy 用傅里叶红外光谱显微镜研究了软x射线辐射对浸冻和冻干玉米根系的损伤

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147384

A. Gianoncelli , M. Žižić , V. Bonanni , G. Birarda , D.E. Bedolla , K. Vogel Mikuš

引用次数: 0

Preface – Advances in photoelectron diffraction and photoelectron holograph 前言:光电子衍射和光电子全息术的研究进展

IF 1.9 4区物理与天体物理

Journal of Electron Spectroscopy and Related Phenomena Pub Date : 2023-08-01 DOI: 10.1016/j.elspec.2023.147339

Hiroshi Daimon , Michel A. Van Hove

引用次数: 0