{"id":499,"date":"2020-03-24T12:48:56","date_gmt":"2020-03-24T17:48:56","guid":{"rendered":"http:\/\/maximus.energy\/?post_type=product&#038;p=499"},"modified":"2026-04-17T14:45:04","modified_gmt":"2026-04-17T19:45:04","slug":"si19n","status":"publish","type":"product","link":"https:\/\/maximus.energy\/index.php\/product\/si19n\/","title":{"rendered":"<sup>3<\/sup>He Neutron Detector"},"content":{"rendered":"<p>The Maximus Energy <sup>3<\/sup>He Neutron Detector is <strong>highly sensitive to thermal neutrons<\/strong> and an excellent choice for professional researchers and enthusiasts alike. Helium-3-filled proportional counters are characterized by the highest sensitivity to thermal neutrons across all neutron detector classes, making them indispensable for:<\/p>\n<ul>\n<li>Thermonuclear fusion research &amp; development<\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Nuclear<\/span> <span data-sd-animate=\"true\">reactor<\/span> <span data-sd-animate=\"true\">monitoring<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">control<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">flux<\/span> <span data-sd-animate=\"true\">measurement,<\/span> <span data-sd-animate=\"true\">reactor<\/span> <span data-sd-animate=\"true\">protection)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Nuclear<\/span> <span data-sd-animate=\"true\">safeguards<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">nonproliferation<\/span> <span data-sd-animate=\"true\">(fuel<\/span> <span data-sd-animate=\"true\">inventory,<\/span> <span data-sd-animate=\"true\">diversion<\/span> <span data-sd-animate=\"true\">detection)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Radiation<\/span> <span data-sd-animate=\"true\">portal<\/span> <span data-sd-animate=\"true\">monitors<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">border<\/span> <span data-sd-animate=\"true\">security<\/span> <span data-sd-animate=\"true\">(detection<\/span> <span data-sd-animate=\"true\">of<\/span> <span data-sd-animate=\"true\">illicit<\/span> <span data-sd-animate=\"true\">nuclear<\/span> <span data-sd-animate=\"true\">materials)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Homeland<\/span> <span data-sd-animate=\"true\">security<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">counterterrorism<\/span> <span data-sd-animate=\"true\">(searches<\/span> <span data-sd-animate=\"true\">for<\/span> <span data-sd-animate=\"true\">concealed<\/span> <span data-sd-animate=\"true\">fissionable<\/span> <span data-sd-animate=\"true\">sources)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Neutron<\/span> <span data-sd-animate=\"true\">activation<\/span> <span data-sd-animate=\"true\">analysis<\/span> <span data-sd-animate=\"true\">(elemental\/trace<\/span> <span data-sd-animate=\"true\">analysis<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">archaeology,<\/span> <span data-sd-animate=\"true\">geology,<\/span> <span data-sd-animate=\"true\">forensics)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Oil,<\/span> <span data-sd-animate=\"true\">gas,<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">hydrocarbon<\/span> <span data-sd-animate=\"true\">logging<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">porosity<\/span> <span data-sd-animate=\"true\">logging,<\/span> <span data-sd-animate=\"true\">reservoir<\/span> <span data-sd-animate=\"true\">characterization)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Well<\/span> <span data-sd-animate=\"true\">logging<\/span> <span data-sd-animate=\"true\">for<\/span> <span data-sd-animate=\"true\">mining<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">petroleum<\/span> <span data-sd-animate=\"true\">(formation<\/span> <span data-sd-animate=\"true\">evaluation,<\/span> <span data-sd-animate=\"true\">moisture\/porosity)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Soil<\/span> <span data-sd-animate=\"true\">moisture<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">hydrogeology<\/span> <span data-sd-animate=\"true\">surveys<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">moisture<\/span> <span data-sd-animate=\"true\">gauges<\/span> <span data-sd-animate=\"true\">for<\/span> <span data-sd-animate=\"true\">bulk<\/span> <span data-sd-animate=\"true\">water<\/span> <span data-sd-animate=\"true\">content)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Neutron<\/span> <span data-sd-animate=\"true\">radiography<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">imaging<\/span> <span data-sd-animate=\"true\">(industrial<\/span> <span data-sd-animate=\"true\">inspection,<\/span> <span data-sd-animate=\"true\">material<\/span> <span data-sd-animate=\"true\">defects,<\/span> <span data-sd-animate=\"true\">flow<\/span> <span data-sd-animate=\"true\">visualization)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Medical<\/span> <span data-sd-animate=\"true\">isotope<\/span> <span data-sd-animate=\"true\">production<\/span> <span data-sd-animate=\"true\">monitoring<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">quality<\/span> <span data-sd-animate=\"true\">control<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Radiation<\/span> <span data-sd-animate=\"true\">protection<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">dosimetry<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">dose<\/span> <span data-sd-animate=\"true\">monitoring<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">workplaces)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Neutron<\/span> <span data-sd-animate=\"true\">scattering<\/span> <span data-sd-animate=\"true\">instruments<\/span> <span data-sd-animate=\"true\">(beam<\/span> <span data-sd-animate=\"true\">monitors,<\/span> <span data-sd-animate=\"true\">flux<\/span> <span data-sd-animate=\"true\">normalization<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">research<\/span> <span data-sd-animate=\"true\">reactors<\/span>, <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">spallation<\/span> <span data-sd-animate=\"true\">sources)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Particle<\/span> <span data-sd-animate=\"true\">physics<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">nuclear<\/span> <span data-sd-animate=\"true\">physics<\/span> <span data-sd-animate=\"true\">experiments<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">detection<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">detectors,<\/span> <span data-sd-animate=\"true\">beam<\/span> <span data-sd-animate=\"true\">diagnostics)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Fusion<\/span> <span data-sd-animate=\"true\">research<\/span> <span data-sd-animate=\"true\">(neutron<\/span> <span data-sd-animate=\"true\">yield<\/span> <span data-sd-animate=\"true\">measurements,<\/span> <span data-sd-animate=\"true\">diagnostics<\/span> <span data-sd-animate=\"true\">for<\/span> <span data-sd-animate=\"true\">tokamaks<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">inertial<\/span> <span data-sd-animate=\"true\">fusion)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Spacecraft<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">planetary<\/span> <span data-sd-animate=\"true\">science<\/span> <span data-sd-animate=\"true\">(cosmic-ray\/planetary<\/span> <span data-sd-animate=\"true\">neutron<\/span> <span data-sd-animate=\"true\">detectors<\/span> <span data-sd-animate=\"true\">for<\/span> <span data-sd-animate=\"true\">composition<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">hydrogen\/water<\/span> <span data-sd-animate=\"true\">detection)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Environmental<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">climate<\/span> <span data-sd-animate=\"true\">studies<\/span> <span data-sd-animate=\"true\">(cosmogenic<\/span> <span data-sd-animate=\"true\">neutron<\/span> <span data-sd-animate=\"true\">soil<\/span> <span data-sd-animate=\"true\">moisture<\/span> <span data-sd-animate=\"true\">mapping,<\/span> <span data-sd-animate=\"true\">snowpack<\/span> <span data-sd-animate=\"true\">measurement)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Industrial<\/span> <span data-sd-animate=\"true\">process<\/span> <span data-sd-animate=\"true\">control<\/span> <span data-sd-animate=\"true\">(monitoring<\/span> <span data-sd-animate=\"true\">thickness,<\/span> <span data-sd-animate=\"true\">composition,<\/span> <span data-sd-animate=\"true\">or<\/span> <span data-sd-animate=\"true\">moisture<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">manufacturing)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Waste<\/span> <span data-sd-animate=\"true\">management<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">characterization<\/span> <span data-sd-animate=\"true\">(radioactive<\/span> <span data-sd-animate=\"true\">waste<\/span> <span data-sd-animate=\"true\">assay,<\/span> <span data-sd-animate=\"true\">fissile<\/span> <span data-sd-animate=\"true\">material<\/span> <span data-sd-animate=\"true\">detection)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Criticality<\/span> <span data-sd-animate=\"true\">safety<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">accident<\/span> <span data-sd-animate=\"true\">response<\/span> <span data-sd-animate=\"true\">(criticality<\/span> <span data-sd-animate=\"true\">monitoring<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">post-accident<\/span> <span data-sd-animate=\"true\">surveys)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Anti-submarine<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">naval<\/span> <span data-sd-animate=\"true\">applications<\/span> <span data-sd-animate=\"true\">(underwater<\/span> <span data-sd-animate=\"true\">neutron<\/span> <span data-sd-animate=\"true\">sensing,<\/span> <span data-sd-animate=\"true\">reactor<\/span> <span data-sd-animate=\"true\">monitoring<\/span> <span data-sd-animate=\"true\">on<\/span> <span data-sd-animate=\"true\">vessels)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Neutron<\/span> <span data-sd-animate=\"true\">coincidence<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">multiplicity<\/span> <span data-sd-animate=\"true\">counting<\/span> <span data-sd-animate=\"true\">(assay<\/span> <span data-sd-animate=\"true\">of<\/span> <span data-sd-animate=\"true\">plutonium<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">mixed-oxide<\/span> <span data-sd-animate=\"true\">materials)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Active<\/span> <span data-sd-animate=\"true\">interrogation<\/span> <span data-sd-animate=\"true\">systems<\/span> <span data-sd-animate=\"true\">(induced<\/span> <span data-sd-animate=\"true\">fission<\/span> <span data-sd-animate=\"true\">detection<\/span> <span data-sd-animate=\"true\">using<\/span> <span data-sd-animate=\"true\">neutron<\/span> <span data-sd-animate=\"true\">sources)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Security<\/span> <span data-sd-animate=\"true\">screening<\/span> <span data-sd-animate=\"true\">in<\/span> <span data-sd-animate=\"true\">ports<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">cargo<\/span> <span data-sd-animate=\"true\">inspection<\/span> <span data-sd-animate=\"true\">(container<\/span> <span data-sd-animate=\"true\">scanning<\/span>, <span data-sd-animate=\"true\">augmenting<\/span> <span data-sd-animate=\"true\">gamma<\/span> <span data-sd-animate=\"true\">systems)<\/span><\/li>\n<li class=\"py-1 [&amp;&gt;p]:inline\" data-streamdown=\"list-item\"><span data-sd-animate=\"true\">Educational<\/span> <span data-sd-animate=\"true\">and<\/span> <span data-sd-animate=\"true\">training<\/span> <span data-sd-animate=\"true\">purposes<\/span> <span data-sd-animate=\"true\">(laboratory<\/span> <span data-sd-animate=\"true\">demonstrations,<\/span> <span data-sd-animate=\"true\">detector<\/span> <span data-sd-animate=\"true\">development)<\/span><\/li>\n<li>Low-energy nuclear reactions (LENR) research &amp; development<\/li>\n<li>General nuclear science research.<\/li>\n<\/ul>\n<p>Maximus Energy <sup>3<\/sup>He Neutron Detector is compatible with most MCA\/DPP systems. To build a complete <a href=\"https:\/\/maximus.energy\/index.php\/product\/neutron-lite\/\">neutron spectrometer<\/a>, connect the detector to the <a href=\"https:\/\/maximus.energy\/index.php\/product\/mca-lite\/\">MCA-LITE<\/a> and use the <a href=\"https:\/\/maximus.energy\/index.php\/product\/pulsecounter-pro\/\">PulseCounter Pro<\/a> spectroscopy software to acquire a neutron spectrum and counts.<\/p>\n<p><strong>Specifications<\/strong><\/p>\n<ul>\n<li><strong>Enclosure length: <\/strong>248 mm<\/li>\n<li><strong>Enclosure diameter:<\/strong> 34 mm<\/li>\n<li><strong>Active volume:<\/strong> 200 x 32 mm<\/li>\n<li><strong>Fill gas:<\/strong> <sup>3<\/sup>He<\/li>\n<li><strong>Pressure:<\/strong> 2 atm<\/li>\n<li><strong>Sensitivity: <\/strong>47 CPS\/nv<\/li>\n<li><strong>Typical background counts:<\/strong> 1-5 CPM<\/li>\n<li><strong>Recommended bias:<\/strong> 1350V<\/li>\n<\/ul>\n<p><strong>Moderator<\/strong><\/p>\n<ul>\n<li>To maximize counts when detecting fast neutrons, use a <a href=\"https:\/\/maximus.energy\/index.php\/product\/moderator\/\">moderator<\/a>.<\/li>\n<li>Use GEANT4 or MCNP to calculate the optimal moderator thickness based on the properties of your neutron source and your environment.<\/li>\n<\/ul>\n<p><strong>Connectors<\/strong><\/p>\n<ul>\n<li>SHV connector (signal + bias, see the recommended connectivity diagram).<\/li>\n<\/ul>\n<p><strong>Warranty<\/strong><\/p>\n<ul>\n<li>1-year parts and labor; buyer pays for shipping.<\/li>\n<\/ul>\n<p><strong>Additional Information<\/strong><\/p>\n<ul>\n<li><a href=\"https:\/\/maximus.energy\/index.php\/2024\/09\/21\/introduction-to-neutron-detection\/\">Introduction to Neutron Detection<\/a><\/li>\n<li><a href=\"https:\/\/maximus.energy\/wp-content\/uploads\/2026\/03\/Reliable-Neutron-Detection-in-Noisy-Environments.pdf\" data-type=\"link\" data-id=\"https:\/\/maximus.energy\/wp-content\/uploads\/2023\/11\/Reliable-Neutron-and-Gamma-Detection.pdf\">Reliable Neutron Detection (pdf)<\/a><\/li>\n<li><a href=\"https:\/\/maximus.energy\/index.php\/2021\/06\/01\/make-your-own-neutron-source\/\">Po-Be Neutron Check Source<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>High-sensitivity thermal neutron detector (helium-3 proportional counter).<\/p>\n","protected":false},"featured_media":4188,"template":"","meta":{"jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"product_brand":[],"product_cat":[23],"product_tag":[],"class_list":["post-499","product","type-product","status-publish","has-post-thumbnail","product_cat-neutron","first","instock","shipping-taxable","purchasable","product-type-simple"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_likes_enabled":true,"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/product\/499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/media\/4188"}],"wp:attachment":[{"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/media?parent=499"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/product_brand?post=499"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/product_cat?post=499"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/maximus.energy\/index.php\/wp-json\/wp\/v2\/product_tag?post=499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}