{"id":44,"date":"2020-11-10T08:51:39","date_gmt":"2020-11-10T08:51:39","guid":{"rendered":"http:\/\/physicsinstruments.de\/?page_id=44"},"modified":"2023-08-04T13:22:03","modified_gmt":"2023-08-04T13:22:03","slug":"source-capsules-for-radioisotopes-in-positron-annihilation-studies","status":"publish","type":"page","link":"https:\/\/physicsinstruments.de\/?page_id=44","title":{"rendered":"RI source capsules"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\" id=\"overview\">Overview<\/h2>\n\n\n\n<ul>\n<li>Positron-emitting radioisotope source capsule for UHV conditions.<\/li>\n\n\n\n<li>Capsules are designed to be filled with <sup>22<\/sup>Na (<sup>22<\/sup>NaCl or the standard <sup>22<\/sup>Na<sub>2<\/sub>CO<sub>3<\/sub> ) with activities up to 3.7 GBq (100 mCi).<\/li>\n\n\n\n<li>Capsule geometrical design and materials are optimized for high positron emissivity and long-term operations.<\/li>\n\n\n\n<li>The capsules is bakeable up to 180\u00b0C (450 K) and operational from -270\u00b0C (4 K) to 180\u00b0C (450 K).<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"source-capsule-design\">Source capsule design<\/h2>\n\n\n\n<p>The source capsule consists of 4 parts: <\/p>\n\n\n\n<ul>\n<li>The Titanium rear part ending in a stud for manipulating and fixing the source. The rear stud fatures a ring-shaped recession for better handling. Alternatively, it can be re-machined on request as 6-32 UNC (NEN-type source), M3 x 0.5 or M4 x 0.7 with a length of 0.25\u201d (6.4mm). <\/li>\n\n\n\n<li>A 3.5 mm diameter Tantalum reflection plate with a 2 mm diameter and 250 \u00b5m deep recess is press-fitted into the Ti rear part. The radioisotope solute is being deposited carefully into the recess and dryed afterwards. The recess has an inclined side-wall in order to minimize positron absorption and scattering.<\/li>\n\n\n\n<li>The Titanium front part with the Titanium foil (5-8 \u00b5m thickness, 4 mm inner diameter) and side slits for easy handling using a manipulator (see below).<\/li>\n\n\n\n<li>A Titanium ring welded to the Titanium front part which fixed the foil and seals the capsule.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group__inner-container\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group__inner-container\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-layout-1 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\"><div class=\"wp-block-group__inner-container\"><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"http:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-1024x1024.jpg\" alt=\"\" class=\"wp-image-118\" srcset=\"https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-1024x1024.jpg 1024w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-300x300.jpg 300w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-150x150.jpg 150w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-768x768.jpg 768w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-1536x1536.jpg 1536w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-2048x2048.jpg 2048w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-6-1600x1600.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Capsule (front view) showing Ti foil front part.<\/strong><\/figcaption><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"http:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-1024x1024.jpg\" alt=\"\" class=\"wp-image-119\" srcset=\"https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-1024x1024.jpg 1024w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-300x300.jpg 300w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-150x150.jpg 150w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-768x768.jpg 768w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-1536x1536.jpg 1536w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-2048x2048.jpg 2048w, https:\/\/physicsinstruments.de\/wp-content\/uploads\/2023\/08\/Capsule-photo-7-1600x1600.jpg 1600w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><strong>Capsule (back side view) showing stud.<\/strong><\/figcaption><\/figure><\/div>\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/physicsinstruments.de\/wp-content\/uploads\/2022\/03\/Capsule-dimensions.png\" alt=\"Capsule dimensions\" class=\"wp-image-52\" width=\"327\" height=\"384\"\/><figcaption class=\"wp-element-caption\"><strong>Capsule dimensions for standard iThemba source. All sizes given in mm.<\/strong><\/figcaption><\/figure><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n<\/div><\/div>\n\n\n\n<p><br>Each source capsule has been tested up to 5 bar overpressure. Moreover, the front part of each capsule was tested to be UHV tight down to 1E-8 Torr. The rear Ti part contains a cavity for the <sup>22<\/sup>Ne and CO<sub>2<\/sub> gases which are released following the decay of <sup>22<\/sup>Na. A small hole at the side connects the cavity with the front section for gas exchange. The overpressure of the released <sup>22<\/sup>Ne gas is less than 1 bar after all <sup>22<\/sup>Na has decayed. <br>A positron moderating foil (e.g. a W single crystal foil) can be attached using a ring-shaped clamp (user solution) at the front stubb of the source capsule. Contacting the Ti source foil with any object (scissors, knifes, sharp edges, cotton swabs, etc.) has to be avoided. Wipe tests of the Ti foil for radiation protection test have been performed after production and have to be avoided thereafter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">RI source supply<\/h2>\n\n\n\n<p>For ordering a source, please contact for international quotes:&nbsp;<\/p>\n\n\n\n<p>Ms. Debbie Christians<br>Radionuclide Production Group<br>iThemba LABS<br>P O Box 722, Somerset West 7130<br>South Africa<br>Tel: +27 (0)21 843 1338<br>Fax: +27 (0)21 843 1384<\/p>\n\n\n\n<p>email: <a href=\"mailto:isotopes@tlabs.ac.za\">isotopes@tlabs.ac.za<\/a> or <a href=\"mailto:d.christians@tlabs.ac.za\">d.christians@tlabs.ac.za<\/a><br>www: <a href=\"https:\/\/tlabs.ac.za\/nuclear-medicine\/radiopharmaceutical-and-radiochemicals-manufacturing\/production\/\">https:\/\/tlabs.ac.za\/nuclear-medicine\/radiopharmaceutical-and-radiochemicals-manufacturing\/production\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overview Source capsule design The source capsule consists of 4 parts: Each source capsule has been tested up to 5&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"_links":{"self":[{"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/pages\/44"}],"collection":[{"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=44"}],"version-history":[{"count":24,"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/pages\/44\/revisions"}],"predecessor-version":[{"id":120,"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=\/wp\/v2\/pages\/44\/revisions\/120"}],"wp:attachment":[{"href":"https:\/\/physicsinstruments.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=44"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}