{"id":13634,"date":"2017-02-02T08:21:55","date_gmt":"2017-02-02T08:21:55","guid":{"rendered":"http:\/\/sitepourvtc.com\/?page_id=13634"},"modified":"2022-10-20T14:57:50","modified_gmt":"2022-10-20T14:57:50","slug":"alpha-radiation","status":"publish","type":"page","link":"https:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/alpha-radiation\/","title":{"rendered":"Alpha Radiation"},"content":{"rendered":"<div   id="8n9s8rpp6h"    class=\"su-quote su-quote-style-default\"><div   id="8n9s8rpp6h"    class=\"su-quote-inner su-u-clearfix su-u-trim\"> <strong>Alpha\u00a0radiation<\/strong> consists of <strong><a title=\"Alpha Particle\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\">alpha particles<\/a>\u00a0<\/strong>that are energetic <strong>nuclei of helium<\/strong>. The production of alpha particles is termed alpha decay. Alpha particles consist of two protons and two <a title=\"Neutron\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\">neutrons<\/a> bound together into a particle identical to a helium nucleus. Alpha particles are relatively large and carry a double positive charge. They are not very penetrating, and a piece of paper can stop them. They travel only a few centimeters but deposit all their energies along their short paths.<\/div><\/div>\n<figure id=\"attachment_11672\" aria-describedby=\"caption-attachment-11672\" style=\"width: 290px\" class=\"wp-caption alignright\"><a href=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/Alpha_particle_cloud_chamber.jpg\"><img loading=\"lazy\" class=\"size-medium wp-image-11672\" src=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/Alpha_particle_cloud_chamber-300x156.jpg\" alt=\"Alpha Particle - Cloud Chamber\" width=\"300\" height=\"156\" srcset=\"https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/Alpha_particle_cloud_chamber-300x156.jpg 300w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/Alpha_particle_cloud_chamber-1024x535.jpg 1024w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/Alpha_particle_cloud_chamber.jpg 1162w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-11672\" class=\"wp-caption-text\">Alpha particles and electrons (deflected by a magnetic field) from a thorium rod in a cloud chamber.<br \/>Source: wikipedia.org<\/figcaption><\/figure>\n<p>Key characteristics of alpha radiation are summarized in few following points:<\/p>\n<ul>\n<li><a title=\"Alpha Particle\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\"><strong>Alpha particles<\/strong><\/a> are energetic <strong>nuclei of helium,<\/strong> and they\u00a0are relatively heavy\u00a0and carry a <strong>double positive charge<\/strong>.<\/li>\n<li>Typical alpha particles have a kinetic energy of about 5 MeV. This is due to the nature of alpha decay.<\/li>\n<li>Pure alpha decay is very rare, and alpha decay is frequently accompanied by <a title=\"Gamma Rays \/ Gamma Radiation\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">gamma radiation<\/a>.<\/li>\n<li>Alpha particles <a title=\"Interaction of Heavy Charged Particles with Matter\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/\">interact with matter<\/a> primarily through <strong>coulomb forces<\/strong> (ionization and excitation of matter) between their electrons\u2019 positive and negative charge of the electrons from atomic orbitals.<\/li>\n<li>Alpha particles <strong>heavily ionize matter,<\/strong> and they quickly lose their\u00a0kinetic energy. Therefore alpha particles have <strong>very short ranges<\/strong>. On the other hand, they deposit all their energies along their short paths.<\/li>\n<li>For example, the ranges of a 5 MeV alpha particle (most have such initial energy) are approximately 0,002 cm in aluminium alloy or approximately 3.5 cm in air.<\/li>\n<li>The <a title=\"Stopping Power \u2013 Bethe Formula\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/stopping-power-bethe-formula\/\">Bethe formula<\/a> well describes the stopping power.<\/li>\n<li><a title=\"Bragg Curve and Bragg Peak\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/bragg-curve-bragg-peak\/\"><strong>The Bragg curve<\/strong><\/a> is typical for alpha particles and other heavy-charged particles and describes the energy loss of ionizing radiation during travel through matter.<\/li>\n<\/ul>\n<p><img loading=\"lazy\" class=\"size-medium wp-image-12728 alignright\" src=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/shielding_alpha_beta-300x250.png\" alt=\"Shielding of Alpha and Beta Radiation\" width=\"300\" height=\"250\" srcset=\"https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/shielding_alpha_beta-300x250.png 300w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/shielding_alpha_beta-1024x853.png 1024w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/shielding_alpha_beta.png 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/p>\n<p>The stopping power of most materials is very high for alpha particles and heavy-charged particles. Therefore alpha particles have <strong>very short ranges<\/strong>. For example, the ranges of a 5 MeV alpha particle (most have such initial energy) are approximately 0,002 cm in aluminium alloy or approximately 3.5 cm in air. A thin piece of paper can stop most alpha particles<strong><span style=\"font-weight: 400;\">. Even the dead cells in the outer layer of human skin provide adequate shielding because alpha particles can\u2019t penetrate it.\u00a0<\/span><\/strong><\/p>\n<div   id="8n9s8rpp6h"    class=\"collapsible-container\">\n<h2>Alpha Decay<\/h2>\n<p><a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/alpha-decay-alpha-radioactivity\/\"><strong>Alpha decay<\/strong><\/a> (or <strong>\u03b1-decay\u00a0<\/strong>and <strong>alpha radioactivity<\/strong>)\u00a0represents the disintegration of a\u00a0<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/atom-properties-of-atoms\/atomic-nucleus\/parent-nucleus-daughter-nucleus\/\">parent nucleus<\/a>\u00a0to a daughter through the emission of the nucleus of a helium atom. <strong>Alpha decay is a quantum tunneling process<\/strong>. To be emitted, the <a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\">alpha particle<\/a>\u00a0must penetrate a potential barrier. This is similar to\u00a0<strong>cluster decay<\/strong>, in which an atomic nucleus emits a small \u201ccluster\u201d of neutrons and protons (e.g.,, <sup>12<\/sup>C).<\/p>\n<p>The height of the\u00a0<strong>Coulomb barrier<\/strong>\u00a0for nuclei of A \u00ab 200 is about\u00a0<strong>20-25 MeV<\/strong>. The alpha particles emitted in nuclear decay have typical energies of about 5 MeV.<\/p>\n<h2>Alpha Particles<\/h2>\n<p><strong><a href=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/alpha_particle.png\"><img loading=\"lazy\" class=\"alignright size-full wp-image-11639\" src=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/alpha_particle.png\" alt=\"Alpha Particle - Interaction with Matter\" width=\"300\" height=\"300\" srcset=\"https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/alpha_particle.png 300w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/alpha_particle-150x150.png 150w, https:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/03\/alpha_particle-66x66.png 66w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\">Alpha particles<\/a><\/strong> are energetic <strong>nuclei of helium<\/strong>. The production of alpha particles is termed alpha decay. Alpha particles consist of two protons and two <a title=\"Neutron\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\">neutrons<\/a> bound together into a particle identical to a helium nucleus. Alpha particles are relatively large and carry a double positive charge. They are <strong>not very penetrating,<\/strong> and a piece of paper can stop them. They travel only a few centimeters but deposit all their energies along their short paths. In <a title=\"Nuclear Reactor\" href=\"http:\/\/sitepourvtc.com\/nuclear-power-plant\/nuclear-reactor\/\">nuclear reactors<\/a>, they are produced in the <a title=\"Nuclear Fuel\" href=\"http:\/\/sitepourvtc.com\/nuclear-power-plant\/nuclear-fuel\/\">fuel<\/a> (alpha decay of heavy nuclei). Alpha particles are commonly emitted by all of the\u00a0heavy\u00a0<a title=\"Radioactive Decay\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radioactive-decay\/\">radioactive<\/a> nuclei occurring in nature (uranium, thorium, or radium), as well as the transuranic elements (neptunium, plutonium, or americium). Especially <strong>energetic<\/strong> <strong>alpha particles<\/strong> (except artificially accelerated helium nuclei) are produced in a nuclear process known as <strong>ternary fission<\/strong>. In this process, the uranium nucleus is split into <strong>three charged particles<\/strong> (fission fragments) instead of the normal two. The smallest fission fragments most probably (90% probability) is an extra energetic alpha particle.<\/p>\n<h2>Interaction of Alpha Particles with Matter<\/h2>\n<p>Since the electromagnetic interaction extends over some distance, alpha particles don&#8217;t have to collide with an atom directly. They can transfer energy simply by <strong>passing close by<\/strong>. <strong>Alpha particles<\/strong> <strong>interact with matter primarily through coulomb forces<\/strong> between their positive charge and the negative charge of the electrons from atomic orbitals. In general, the alpha particles (like other charged particles) transfer energy mostly by:<\/p>\n<ul>\n<li><strong>Excitation.<\/strong> The charged particle can transfer energy to the atom, raising electrons to higher energy levels.<\/li>\n<li><strong>Ionization.<\/strong> Ionization can occur when the charged particle has enough energy to remove an electron. This results in the creation of ion pairs in surrounding matter.<\/li>\n<\/ul>\n<p>The creation of pairs requires energy, which is lost from the kinetic energy of the alpha particle, causing it <strong>to decelerate<\/strong>. The positive ions and free electrons created by the passage of the alpha\u00a0particle will then\u00a0reunite, releasing\u00a0energy <strong>in the form of heat<\/strong> (e.g.,, vibrational energy or rotational energy of atoms). There are considerable differences in the ways of energy loss and scattering between the passage of light-charged particles such as positrons and electrons and heavy charged particles such as fission fragments, alpha particles, muons. Most of these differences are based on the different dynamics of the collision process. In general, when a heavy particle collides with a much lighter particle (electrons in the atomic orbitals), the laws of energy and momentum conservation predict that only a small fraction of the massive particle\u2019s energy can be transferred to the less massive particle. The actual amount of transferred energy depends on how closely the charged particles pass through the atom, and it also depends on restrictions from the quantization of energy levels.<\/p>\n<p>See also: <a title=\"Interaction of Heavy Charged Particles with Matter\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/interaction-radiation-matter\/interaction-heavy-charged-particles\/\">Interaction of Heavy Charged Particles with Matter<\/a><\/p>\n<h2>Alpha Radiation &#8211; Biological Effects<\/h2>\n<p>Alpha and beta particles, in general, constitute no external exposure hazard because the particles generally do not pass through the skin. On the other hand, alpha radiation is very harmful when alpha radionuclides are ingested or inhaled. <a href=\"http:\/\/sitepourvtc.com\/nuclear-engineering\/radiation-protection\/internal-exposure-internal-contamination\/\"><strong>Internal exposure<\/strong><\/a> is more dangerous than external exposure since we are carrying the source of radiation inside our bodies, and we cannot use any of the <a href=\"http:\/\/sitepourvtc.com\/nuclear-engineering\/radiation-protection\/\">radiation protection principles<\/a>\u00a0(time, distance, shielding).<\/p>\n<p>Studies have shown that alpha and neutron radiation cause greater biological damage for a given energy deposition per kg of tissue than gamma radiation does. It was discovered, biological effects of any radiation\u00a0<strong>increase<\/strong>\u00a0with the\u00a0<strong>linear energy transfer<\/strong>\u00a0(LET). In short, the biological damage from\u00a0<strong>high-LET radiation<\/strong>\u00a0(<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/alpha-particle\/\">alpha particles<\/a>,\u00a0<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/what-is-proton-properties-of-proton\/\">protons<\/a>,\u00a0or\u00a0<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/\">neutrons<\/a>) is much greater than that from\u00a0<strong>low-LET radiation<\/strong>\u00a0(<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/photon\/gamma-ray\/\">gamma rays<\/a>). This is because the living tissue can more easily repair damage from radiation spread over a large area than that which is concentrated in a small area.<\/p>\n<p>See also:<a href=\"https:\/\/www.radiation-dosimetry.org\/what-is-alpha-dosimetry-definition\/\"> Alpha Dosimetry<\/a><\/p>\n<h2>Shielding of Alpha Radiation<\/h2>\n<p>The shielding of alpha radiation alone does not pose a difficult problem. On the other hand, Alpha radioactive nuclides can lead to serious health hazards when ingested or inhaled (internal contamination). When they are ingested or inhaled, the alpha particles from their decay significantly harm the internal living tissue. Moreover, pure alpha radiation is very rare, and alpha decay is frequently accompanied by gamma radiation which shielding is another issue.<\/p>\n<p>See also: <a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/shielding-of-ionizing-radiation\/shielding-of-alpha-radiation\/\">Shielding of Alpha Radiation<\/a>.<\/p>\n<div   id="8n9s8rpp6h"    class=\"su-accordion su-u-trim\"><div   id="8n9s8rpp6h"    class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\" data-scroll-offset=\"0\"><div   id="8n9s8rpp6h"    class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>Radiation Protection Principles - Time, Distance, Shielding<\/div><div   id="8n9s8rpp6h"    class=\"su-spoiler-content su-u-clearfix su-u-trim\">In radiation protection there are three ways how to protect people from identified radiation sources:<\/p>\n<ul>\n<li><strong>Limiting Time.<\/strong> The amount of radiation exposure depends directly (linearly)<strong> on the time<\/strong> people spend near the radiation source. The dose can be <strong>reduced by limiting exposure time<\/strong>.<\/li>\n<li><strong>Distance.<\/strong> The amount of radiation exposure depends on the distance from the source of radiation. Like heat from a fire, if you are too close, the intensity of heat radiation is high, and you can get burned. If you are at the right distance, you can withstand there without any problems, and it is comfortable. If you are too far from a heat source, the insufficiency of heat can also hurt you. This analogy, in a certain sense, can be applied to radiation also from radiation sources.<\/li>\n<li><strong>Shielding.<\/strong> Finally, if the source is too intensive and time or distance does not provide sufficient radiation protection, the shielding must be used. Radiation shielding usually consists of barriers of lead, concrete, or water. Many materials can be used for radiation shielding, but there are many situations in radiation protection. It depends on the type of radiation to be shielded, its energy, and many other parameters. For example, even depleted uranium can be used as good protection from gamma radiation, but on the other hand, uranium is inappropriate <a title=\"Shielding of Neutron Radiation\" href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/fundamental-particles\/neutron\/shielding-neutron-radiation\/\">shielding of neutron radiation<\/a>.<\/li>\n<\/ul>\n<figure id=\"attachment_12696\" aria-describedby=\"caption-attachment-12696\" style=\"width: 890px\" class=\"wp-caption aligncenter\"><a href=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/radiation_protection_principles.gif\"><img loading=\"lazy\" class=\"size-full wp-image-12696\" src=\"http:\/\/sitepourvtc.com\/wp-content\/uploads\/2015\/09\/radiation_protection_principles.gif\" alt=\"radiation protection pronciples - time, distance, shielding\" width=\"900\" height=\"700\" \/><\/a><figcaption id=\"caption-attachment-12696\" class=\"wp-caption-text\">Principles of Radiation Protection &#8211; Time, Distance, Shielding<\/figcaption><\/figure>\n<\/div><\/div><\/div>\n<\/div>\n<div   id="8n9s8rpp6h"    class=\"su-divider su-divider-style-dotted\" style=\"margin:20px 0;border-width:2px;border-color:#999999\"><\/div>\n<div   id="8n9s8rpp6h"     class=\"lgc-column lgc-grid-parent lgc-grid-100 lgc-tablet-grid-100 lgc-mobile-grid-100 lgc-equal-heights \"><div   id="8n9s8rpp6h"     class=\"inside-grid-column\">\u00a0 <div   id="8n9s8rpp6h"    class=\"su-accordion su-u-trim\"><div   id="8n9s8rpp6h"    class=\"su-spoiler su-spoiler-style-default su-spoiler-icon-plus su-spoiler-closed\" data-scroll-offset=\"0\"><div   id="8n9s8rpp6h"    class=\"su-spoiler-title\" tabindex=\"0\" role=\"button\"><span class=\"su-spoiler-icon\"><\/span>References:<\/div><div   id="8n9s8rpp6h"    class=\"su-spoiler-content su-u-clearfix su-u-trim\"><strong>Nuclear and Reactor Physics:<\/strong>\n<ol>\n<li>J. R. Lamarsh, Introduction to Nuclear Reactor Theory, 2nd ed., Addison-Wesley, Reading,\u00a0MA (1983).<\/li>\n<li>J. R. Lamarsh, A. J. Baratta, Introduction to Nuclear Engineering, 3d ed., Prentice-Hall, 2001, ISBN: 0-201-82498-1.<\/li>\n<li>W. M. Stacey, Nuclear Reactor Physics, John Wiley &amp; Sons, 2001, ISBN: 0- 471-39127-1.<\/li>\n<li>Glasstone, Sesonske. Nuclear Reactor Engineering: Reactor Systems Engineering,\u00a0Springer; 4th edition, 1994, ISBN:\u00a0978-0412985317<\/li>\n<li>W.S.C. Williams. Nuclear and Particle Physics.\u00a0Clarendon Press; 1 edition, 1991, ISBN:\u00a0978-0198520467<\/li>\n<li>G.R.Keepin. Physics of Nuclear Kinetics.\u00a0Addison-Wesley Pub. Co; 1st edition, 1965<\/li>\n<li>Robert Reed Burn, Introduction to Nuclear Reactor Operation, 1988.<\/li>\n<li>U.S. Department of Energy, Nuclear Physics and Reactor Theory.\u00a0DOE Fundamentals Handbook,\u00a0Volume 1 and 2.\u00a0January\u00a01993.<\/li>\n<\/ol>\n<p><strong><\/strong><strong>Advanced Reactor Physics:<\/strong><\/p>\n<ol>\n<li>K. O. Ott, W. A. Bezella, Introductory Nuclear Reactor Statics, American Nuclear Society, Revised edition (1989), 1989, ISBN: 0-894-48033-2.<\/li>\n<li>K. O. Ott, R. J. Neuhold, Introductory Nuclear Reactor Dynamics, American Nuclear Society, 1985, ISBN: 0-894-48029-4.<\/li>\n<li><span style=\"font-weight: 400;\">D. L. Hetrick, Dynamics of Nuclear Reactors, American Nuclear Society, 1993, ISBN: 0-894-48453-2.\u00a0<\/span><\/li>\n<li>E. E. Lewis, W. F. Miller, Computational Methods of Neutron Transport, American Nuclear Society, 1993, ISBN: 0-894-48452-4.<\/li>\n<\/ol>\n<\/div><\/div><\/div><div   id="8n9s8rpp6h"    class=\"su-divider su-divider-style-dotted\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><\/div><\/div><div   id="8n9s8rpp6h"    class=\"su-divider su-divider-style-default\" style=\"margin:15px 0;border-width:2px;border-color:#999999\"><\/div><div   id="8n9s8rpp6h"     class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div   id="8n9s8rpp6h"     class=\"inside-grid-column\">\n<h2>See previous:<\/h2>\n<a href=\"\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><i class=\"sui sui-link\" style=\"font-size:16px;color:#5d5d5d\"><\/i> <\/span><\/a><\/div><\/div><div   id="8n9s8rpp6h"     class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div   id="8n9s8rpp6h"     class=\"inside-grid-column\">\n<h2>See above:<\/h2>\n<p>Radiation<a href=\"http:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><i class=\"sui sui-link\" style=\"font-size:16px;color:#5d5d5d\"><\/i> <\/span><\/a><\/p><\/div><\/div><div   id="8n9s8rpp6h"     class=\"lgc-column lgc-grid-parent lgc-grid-33 lgc-tablet-grid-33 lgc-mobile-grid-100 lgc-equal-heights \"><div   id="8n9s8rpp6h"     class=\"inside-grid-column\">\n<h2>See next:<\/h2>\n<a href=\"\" class=\"su-button su-button-style-flat\" style=\"color:#606060;background-color:#ffffff;border-color:#cccccc;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px\" target=\"_self\"><span style=\"color:#606060;padding:7px 20px;font-size:16px;line-height:24px;border-color:#ffffff;border-radius:10px;-moz-border-radius:10px;-webkit-border-radius:10px;text-shadow:0px 0px 0px #000000;-moz-text-shadow:0px 0px 0px #000000;-webkit-text-shadow:0px 0px 0px #000000\"><i class=\"sui sui-link\" style=\"font-size:16px;color:#5d5d5d\"><\/i> <\/span><\/a><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Key characteristics of alpha radiation are summarized in few following points: Alpha particles are energetic nuclei of helium, and they\u00a0are relatively heavy\u00a0and carry a double positive charge. Typical alpha particles have a kinetic energy of about 5 MeV. This is due to the nature of alpha decay. Pure alpha decay is very rare, and alpha &#8230; <a title=\"Alpha Radiation\" class=\"read-more\" href=\"https:\/\/sitepourvtc.com\/nuclear-power\/reactor-physics\/atomic-nuclear-physics\/radiation\/alpha-radiation\/\" aria-label=\"More on Alpha Radiation\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":11325,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"generate_page_header":""},"_links":{"self":[{"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/pages\/13634"}],"collection":[{"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/comments?post=13634"}],"version-history":[{"count":4,"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/pages\/13634\/revisions"}],"predecessor-version":[{"id":32834,"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/pages\/13634\/revisions\/32834"}],"up":[{"embeddable":true,"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/pages\/11325"}],"wp:attachment":[{"href":"https:\/\/sitepourvtc.com\/wp-json\/wp\/v2\/media?parent=13634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}