{"id":147,"date":"2020-05-06T22:55:40","date_gmt":"2020-05-07T03:55:40","guid":{"rendered":"https:\/\/www.cd-bioparticles.com\/blog\/?p=147"},"modified":"2020-05-06T22:55:40","modified_gmt":"2020-05-07T03:55:40","slug":"when-affected-by-positrons-spherical-nanoparticles-release-electron-positron-pairs-forward","status":"publish","type":"post","link":"https:\/\/www.cd-bioparticles.com\/blog\/nanoparticles\/when-affected-by-positrons-spherical-nanoparticles-release-electron-positron-pairs-forward\/","title":{"rendered":"When Affected by Positrons Spherical Nanoparticles Release Electron-Positron Pairs Forward"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"681\" src=\"\/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1-1024x681.jpg\" alt=\"\" class=\"wp-image-148\" srcset=\"\/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1-1024x681.jpg 1024w, \/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1-300x199.jpg 300w, \/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1-768x511.jpg 768w, \/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1-120x80.jpg 120w, \/blog\/wp-content\/uploads\/2020\/05\/Spherical-Nanoparticles-1.jpg 1280w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n\n<p>Theoretical calculations show that <a href=\"https:\/\/www.cd-bioparticles.com\/product\/spherical-gold-nanoparticles-list-164.html\">spherical\nnanoparticles<\/a> release unstable electron-positron pairs when affected by\npositrons of specific energies, and the direction of the signal is the same as\nthat of the incident positrons.<\/p>\n\n\n\n<p>When electrons collide with positrons, their antimatter\ncounterparts, and they form unstable pairs, in which two types of particles\norbit each other. Named &#8220;positronium&#8221;, now physicists have created this\nintriguing structure using various positron targets, from atomic gases to metal\nmembranes. However, they have not yet obtained the same results from the vapor\nof nanoparticles, whose unique properties are affected by the free electron\n&#8220;gases&#8221; they contain within well-defined nanometers. This new finding\nwas published in <em>European Physical Journal D<\/em>. <\/p>\n\n\n\n<p>In the new study, Paul-Antoine Hervieux at the University\nof Strasbourg, France and Himadri Chakraborty at Northwest Missouri State\nUniversity, USA, for the first time revealed the\ncharacteristics of positron formation in rugby-like nanoparticles C<sub>60<\/sub>.\nUnder the specific positron impact energy, they showed that the emission of\npositrons is in the same direction as the incoming antiparticles.<\/p>\n\n\n\n<p>Often referred to as buckminsterfullerene or &#8220;buckyballs,&#8221; C60 is stable at room temperature, and is sustainable, easy to synthesize. Because of these useful properties, the discoveries of Hervieux and Chakraborty may have important implications for fields such as astrophysics, material physics, and pharmaceutical research. In particular, they can improve the test of the reaction of antimatter to gravity, which involves structures including positrons and antihydrogen atoms; each of which features positronium in the first steps of their fabrication processes. When positrons of some energies approach the bucketball at angles of up to 10 degrees, the physicists showed that a series of narrow, positive positrons are generated by the &#8220;diffraction resonance&#8221; of the particles. This effect is comparable to the diffraction effect of microscopic spherical obstacles on light. Changes were shown in larger fullerene molecules (such as C<sub>240<\/sub>) and when the particles were excited to higher energy levels. Hervieux and Chakraborty modeled these properties by theoretical calculations of how diffraction resonance affects positron emission angles, as a function of positron impact energy. Their results provide important insights for the many researchers who use these short-lived structures. Now, in future research, the two of them hope to further explore the potential in practical experiments. <\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>Reference:<br>Hervieux, P. A., &amp; Chakraborty, H. S. (2019). Strongly resolved diffraction resonances in positronium formation from C60 in forward direction. <em>The European Physical Journal D<\/em>, 73(12), 1-6. <\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Theoretical calculations show that spherical nanoparticles release unstable electron-positron pairs when affected by positrons of specific energies, and the direction<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[37,36],"class_list":["post-147","post","type-post","status-publish","format-standard","hentry","category-nanoparticles","tag-positrons","tag-spherical-nanoparticles"],"_links":{"self":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/147","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/comments?post=147"}],"version-history":[{"count":1,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/147\/revisions"}],"predecessor-version":[{"id":149,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/posts\/147\/revisions\/149"}],"wp:attachment":[{"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/media?parent=147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/categories?post=147"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cd-bioparticles.com\/blog\/wp-json\/wp\/v2\/tags?post=147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}