[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-seo-665568-105":3,"detail-sidebar-cat-0-en-105":80,"doc-detail-665568-en":130},{"code":4,"msg":5,"data":6},0,"ok",{"site_id":7,"language":8,"slug":9,"title":10,"keywords":11,"description":12,"schema_data":13,"social_meta":73,"head_meta":75,"extra_data":77,"updated_unix":79},105,"en","x-sils-school-on-synchrotron-radiation-fundamental-methodologies-and-applications-photoemission-spectroscopy-fundamental-aspects","X SILS School on Synchrotron Radiation - Fundamental, Methodologies and Applications - Photoemission Spectroscopy - Fundamental Aspects","","Lecture notes for the X SILS School on Synchrotron Radiation, centered on photoemission spectroscopy (PES) and its foundational principles. The material introduces the photoelectric effect and relates photon energy to maximum electron kinetic energy via the work function, then outlines how PES links sample characteristics to measured electron energy spectra. It describes modern spectrometer concepts, measurement of photoelectron current versus kinetic energy, emission angles and spin, and explains the need for vacuum conditions. Applications across surface physics, chemistry, materials and nanotechnologies are highlighted, along with the motivation to treat photoionization as a flexible spectroscopic tool.",{"@graph":14,"@context":72},[15,34,55],{"@type":16,"itemListElement":17},"BreadcrumbList",[18,23,27,31],{"item":19,"name":20,"@type":21,"position":22},"https://docshare.wps.com","Home","ListItem",1,{"item":24,"name":25,"@type":21,"position":26},"https://docshare.wps.com/document/","Document",2,{"item":28,"name":29,"@type":21,"position":30},"https://docshare.wps.com/document/research-report/","Research & Report",3,{"item":32,"name":10,"@type":21,"position":33},"https://docshare.wps.com/document/x-sils-school-on-synchrotron-radiation-fundamental-methodologies-and-applications-photoemission-spectroscopy-fundamental-aspects/665568/",4,{"url":32,"name":10,"@type":35,"image":36,"author":41,"headline":10,"publisher":44,"fileFormat":47,"inLanguage":8,"description":12,"dateModified":48,"datePublished":49,"encodingFormat":47,"isAccessibleForFree":50,"interactionStatistic":51},"DigitalDocument",{"url":37,"@type":38,"width":39,"height":40},"https://docshare.wps.com/thumbnails/x-sils-school-on-synchrotron-radiation-fundamental-methodologies-and-applications-photoemission-spectroscopy-fundamental-aspects/665568.png","ImageObject",300,407,{"name":42,"@type":43},"cryingin4k","Person",{"url":19,"name":45,"@type":46},"DocShare","Organization","application/pdf","2026-10-30","2026-10-29",true,{"@type":52,"interactionType":53,"userInteractionCount":26},"InteractionCounter",{"@type":54},"ViewAction",{"@type":56,"mainEntity":57},"FAQPage",[58,64,68],{"name":59,"@type":60,"acceptedAnswer":61},"What is the basic idea of photoelectron spectroscopy (PES)?","Question",{"text":62,"@type":63},"PES studies the electronic structure of molecules, solids, and surfaces using the photoelectric effect. A monochromatic photon beam ejects electrons whose energy spectrum reflects sample properties through the work function.","Answer",{"name":65,"@type":60,"acceptedAnswer":66},"How does energy conservation connect photon energy to the ejected electron energy?",{"text":67,"@type":63},"Einstein’s relation links the photon energy hν to the maximum kinetic energy of the emitted electron: EMAXe = hν − Φ, where Φ is the work function.",{"name":69,"@type":60,"acceptedAnswer":70},"Why are vacuum conditions required in photoemission experiments?",{"text":71,"@type":63},"Because the strong interaction of electrons with matter can alter measured distributions. Experiments are performed under vacuum (at least 10−7 mbar) so the probability distribution of photoelectrons is not affected by background gas.","https://schema.org",{"og:url":32,"og:type":74,"og:title":10,"og:site_name":45,"og:description":12},"article",{"robots":76,"canonical":32},"index,follow",{"doc_id":78,"site_id":7},665568,1793304989,{"code":4,"msg":81,"data":82},"success",[83,87,91,95,100,105,110,114,119,122,126],{"id":22,"doc_module":4,"doc_module_name":25,"category_name":84,"show_sort_weight":85,"slug":86},"Story & Novel",90,"story-novel",{"id":26,"doc_module":4,"doc_module_name":25,"category_name":88,"show_sort_weight":89,"slug":90},"Literature",80,"literature",{"id":33,"doc_module":4,"doc_module_name":25,"category_name":92,"show_sort_weight":93,"slug":94},"Exam",70,"exam",{"id":96,"doc_module":4,"doc_module_name":25,"category_name":97,"show_sort_weight":98,"slug":99},5,"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":25,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":25,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":25,"category_name":29,"show_sort_weight":112,"slug":113},8,30,"research-report",{"id":115,"doc_module":4,"doc_module_name":25,"category_name":116,"show_sort_weight":117,"slug":118},9,"Religion & Spirituality",20,"religion-spirituality",{"id":117,"doc_module":4,"doc_module_name":25,"category_name":120,"show_sort_weight":117,"slug":121},"World Cup","world-cup",{"id":123,"doc_module":4,"doc_module_name":25,"category_name":124,"show_sort_weight":123,"slug":125},10,"Lifestyle","lifestyle",{"id":127,"doc_module":4,"doc_module_name":25,"category_name":128,"show_sort_weight":96,"slug":129},19,"General","general",{"code":4,"msg":81,"data":131},{"doc_id":78,"user_id":132,"nickname":42,"user_avatar":133,"doc_module":4,"category_id":111,"category_name":29,"doc_title":10,"doc_description":12,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":26,"is_deleted":4,"is_public":22,"is_downloadable":22,"audit_status":22,"page_count":139,"language":140,"language_code":8,"site_id":7,"html_lang":8,"table_of_contents":141,"faqs":142,"seo_title":143,"seo_description":12,"update_tm":79,"read_time":144},137458181193,"https://ap-avatar.wpscdn.com/davatar_6f874abed73319feea01a86fa6f0fab8","X SILS School on Synchrotron Radiation: Fundamental, Methodologies and Applications.  \nDuino (Trieste), 7-17 september 2009  \nPHOTOEMISSION SPECTROSCOPY  \nFundamental Aspects  \nGiovanni Stefani  \nDipartimento di Fisca “E. Amaldi”, Universita’ Roma Tre CNISM Unita’ di Ricerca di Roma 3  \n1. Intruduction 2  \n2. Energy conservation, binding energy and photoelectron energy 3  \n3. Satellite structures and multiplet splitting 6  \n4. Chemical shift 10  \n5. Molecular photoelectron spectra 11  \n6. Photoelectron angular distributions 17  \n7. Hole sate relaxation 20  \nPhotoemission Spectroscopy: fundamental aspects 1  \nX SILS School on Synchrotron Radiation: Fundamental, Methodologies and Applications.  \nDuino (Trieste), 7-17 september 2009  \n1 INTRODUCTION  \nPhotoelectron spectroscopy has been established as one of the most important method to study the electronic structure of molecules, solids and surfaces. It is based upon the photoelectric effect, oneof the cornerstones on which quantum mechanic description of matter rests.  \nIn essence, the photoelectron effect amounts to shining a monochromatic electromagnetic radiation (hν) on a sample and producing free electrons with a well-defined energy spectrum. Einstein equation connects energy of the quantum of the electromagnetic field (photon) with the maximum energy of the ejected free electron ( EMAXe ) through a constant characteristic of the sample (work function Φ) EMAXe = hν − Φ . Hence, it establishes a close relationship between sample characteristics and energy spectrum of the ejected electrons and suggests using the photoemission process to build up a wide range of different spectroscopies aimed at studying the electronic structure of matter in its various aggregation states.  \nAlthough the photoelectron effect is known since over a century, spectroscopies based upon this phenomenon [1] have developed over the past fifty years, mostly driven by progresses in development of monochromatic, bright and tuneable light sources [2,3] .  \nNow days, photoelectron spectroscopy (PES) has practical applications in many fields of science, such as surface physics and chemistry, material science, nano technologies and still significantly contributes to the understanding of fundamental aspects of physics, chemistry biology etc [4] . The ubiquitous use of photoelectron spectroscopy is testified by the presence of several beamlines devoted to PES in whichever synchrotron radiation source throughout the world.  \nAim of the present lectures is to establish the fundamental concepts upon which PES relays in order to turn a photoelectron experiment in a flexible spectroscopic tool to investigate ground state electronic properties of matter. To this end, we shall make use of the quantum description of the interaction between electromagnetic radiation (EM) and matter outlined in Bertoni’s lectures [5] . A selected set of experiments on quantum objects as simple as atoms, molecules and clusters, will provide evidences for discussing value and limitations of the approximations needed in order to turn a photionization process into a spectroscopic tool.  \nFigure 1. Schematics of thephotionisation process.  \n1.1 Basic concepts  \nThe schematics of a modern photoionization spectrometer is shown in figure 2. In essence, the experiments amounts to measuring the photoelectron current (Je) as a function of the electron kinetic energy (Ee), the electron ejection angle (θ,ϕ) and the spin (σ) for each given energy (hν) and polarization (ε) of the incident photons.  \nPhotoemission Spectroscopy: fundamental aspects 2  \nX SILS School on Synchrotron Radiation: Fundamental, Methodologies and Applications.  \nDuino (Trieste), 7-17 september 2009  \nFigure 2 Schematics of a modern photoionization spectrometer. A monochromatic photon beam (h ν) impinges on the sample; photoelectrons emitted within the solid angle Ω defined by the electron detector (E) are energy analysed, detected and properly histogrammed as a function of the","cbCaivCBBdcWaLPg","https://ap.wps.com/l/cbCaivCBBdcWaLPg","pdf",884414,27,"English","# 1 INTRODUCTION\n## 1.1 Basic concepts\n# 2 ENERGY CONSERVATION, BINDING ENERGY AND PHOTOELECTRON ENERGY\n# 3 Satellite structures and multiplet splitting\n# 4 Chemical shift\n# 5 Molecular photoelectron spectra\n# 6 Photoelectron angular distributions\n# 7 Hole state relaxation","[{\"question\":\"What is the basic idea of photoelectron spectroscopy (PES)?\",\"answer\":\"PES studies the electronic structure of molecules, solids, and surfaces using the photoelectric effect. A monochromatic photon beam ejects electrons whose energy spectrum reflects sample properties through the work function.\"},{\"question\":\"How does energy conservation connect photon energy to the ejected electron energy?\",\"answer\":\"Einstein’s relation links the photon energy hν to the maximum kinetic energy of the emitted electron: EMAXe = hν − Φ, where Φ is the work function.\"},{\"question\":\"Why are vacuum conditions required in photoemission experiments?\",\"answer\":\"Because the strong interaction of electrons with matter can alter measured distributions. Experiments are performed under vacuum (at least 10−7 mbar) so the probability distribution of photoelectrons is not affected by background gas.\"}]","X SILS School on Synchrotron Radiation - Fundamental, Methodologies and Applications - Photoemission Spectroscopy - Fundamental Aspects | PDF",68]