{"id":86661,"date":"2026-10-12T18:39:31","date_gmt":"2026-10-12T13:09:31","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=86661"},"modified":"2026-10-12T18:40:15","modified_gmt":"2026-10-12T13:10:15","slug":"worlds-first-nuclear-clock","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/12-10-2026\/worlds-first-nuclear-clock","title":{"rendered":"World&#8217;s First Nuclear Clock"},"content":{"rendered":"\n<p><strong>Syllabus: GS3\/Science and Technology<\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Context<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Scientists in Vienna and Beijing have independently developed the world\u2019s first two operating nuclear clocks.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is a Nuclear Clock?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nuclear clocks are <strong>precision timekeeping devices<\/strong> that measure time using the frequency of energy transitions within an atomic nucleus.\n<ul class=\"wp-block-list\">\n<li>They are not powered by nuclear <strong>fission or fusion.<\/strong> The term &#8216;nuclear&#8217; refers to the part of the atom that acts as the timekeeping reference.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>It measures time by using lasers to make subatomic particles <strong>called protons and neutrons jump back and forth between energy levels <\/strong>inside the nucleus of an atom, in this case <strong>thorium-229.<\/strong>\n<ul class=\"wp-block-list\">\n<li>Both the Vienna and Beijing teams used<strong> thorium-229, <\/strong>a particular isotope of the radioactive element thorium, embedded in <strong>calcium fluoride crystals.<\/strong><\/li>\n\n\n\n<li>Unlike most atomic nuclei, which require extremely high-energy radiation to excite them, <strong>thorium-229 has a relatively low-energy nuclear transition <\/strong>that can be stimulated using laser light.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>How Is a Nuclear Clock Different from an Atomic Clock?<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>First developed in <strong>1949<\/strong>, atomic clocks are <strong>among the most accurate timekeeping devices<\/strong> ever developed.\n<ul class=\"wp-block-list\">\n<li>Unlike ordinary clocks, which measure time through mechanical movements or the vibrations of quartz crystals, atomic clocks rely on the behaviour of atoms.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Conventional \u200batomic clocks <\/strong>measure time by <strong>using lasers or microwaves<\/strong> to make subatomic particles called <strong>electrons jump back and forth between two energy levels <\/strong>in an atom&#8217;s shell, using elements \u200csuch as \u2060<strong>cesium or strontium.\u00a0<\/strong>\n<ul class=\"wp-block-list\">\n<li>In fact, the internationally recognised definition of a second is based on a specific energy transition in the <strong>caesium-133 atom.<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img data-dominant-color=\"e1e7ee\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"366\" src=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87-1024x366.png\" alt=\"How Is a Nuclear Clock Different from an Atomic Clock?\" class=\"not-transparent wp-image-86662\" style=\"--dominant-color: #e1e7ee; aspect-ratio:2.7979598209638805;width:516px;height:auto\" srcset=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87-1024x366.png 1024w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87-300x107.png 300w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87-768x274.png 768w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87-1536x548.png 1536w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-87.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img data-dominant-color=\"b5bed5\" data-has-transparency=\"false\" loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"897\" src=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-88-1024x897.png\" alt=\"\" class=\"not-transparent wp-image-86663\" style=\"--dominant-color: #b5bed5; aspect-ratio:1.141595175401342;width:511px;height:auto\" srcset=\"https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-88-1024x897.png 1024w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-88-300x263.png 300w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-88-768x673.png 768w, https:\/\/wp-images.nextias.com\/cdn-cgi\/image\/format=auto\/ca\/uploads\/2026\/10\/image-88.png 1340w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\"><strong>Potential Applications<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Systems such as<strong> GPS determine a receiver\u2019s position<\/strong> by measuring the time taken by signals to travel from satellites.\n<ul class=\"wp-block-list\">\n<li>Even tiny timing errors can translate into significant positioning errors, making more precise clocks potentially valuable for navigation systems.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Precise timing synchronises data transmission across <strong>mobile networks, fibre-optic infrastructure and communication systems.<\/strong><\/li>\n\n\n\n<li>Accurate time synchronisation helps establish the chronological order of transactions and supports <strong>reliable operation of financial networks.<\/strong><\/li>\n\n\n\n<li>Nuclear clocks could help scientists investigate interactions between<strong> ultralight dark matter and ordinary matter,<\/strong> as well as test whether fundamental constants of nature vary over time.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Challenges in Developing Nuclear Clocks<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Limited performance:<\/strong> Current nuclear clocks have not yet surpassed the most accurate existing atomic and optical clocks.<\/li>\n\n\n\n<li><strong>Laser technology<\/strong>: Generating and stabilising the required vacuum-ultraviolet laser light is technically demanding.<\/li>\n\n\n\n<li><strong>Material requirements: <\/strong>Developing crystals with suitable optical properties and sufficient thorium concentration remains important for improving performance.<\/li>\n\n\n\n<li><strong>Experimental complexity:<\/strong> Researchers need to improve stability, reproducibility and the ability to operate the clocks reliably in practical conditions.<\/li>\n\n\n\n<li><strong>Limited immediate applications:<\/strong> Their use in navigation, communications and other operational systems remains prospective rather than established.<\/li>\n<\/ul>\n\n\n\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.indiatoday.in\/science\/story\/nuclear-clock-breakthrough-austria-china-build-worlds-first-operating-devices-3012281-2026-10-08\" target=\"_blank\" rel=\"noopener\"><strong>IT<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><strong> Context <\/strong><\/p>\n<li class=\"ms-5\"> Scientists in Vienna and Beijing have independently developed the world\u2019s first two operating nuclear clocks. <\/li>\n<p><\/p>\n<p><strong>What is a Nuclear Clock?  <\/strong><\/p>\n<li class=\"ms-5\"> Nuclear clocks are precision timekeeping devices that measure time using the frequency of energy transitions within an atomic nucleus.\u00a0 <\/li>\n<li class=\"ms-5\">  They are not powered by nuclear fission or fusion. The term &#8216;nuclear&#8217; refers to the part of the atom that acts as the timekeeping reference.<\/li>\n<p><a href=\"https:\/\/www.nextias.com\/ca\/current-affairs\/12-10-2026\/worlds-first-nuclear-clock\" class=\"btn btn-primary btn-sm float-end\">Read More<\/a><\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-86661","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/86661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=86661"}],"version-history":[{"count":3,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/86661\/revisions"}],"predecessor-version":[{"id":86667,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/86661\/revisions\/86667"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=86661"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=86661"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=86661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}