{"id":16,"date":"2007-10-04T19:49:25","date_gmt":"2007-10-05T00:49:25","guid":{"rendered":"http:\/\/www.fruechtetheory.com\/blog\/2007\/10\/04\/analysis-of-yoshki-et-al-observation-of-ultracold-neutron-production-by-9-angstrom-cold-neutrons-in-superfluid-helium\/"},"modified":"2007-10-31T08:01:21","modified_gmt":"2007-10-31T13:01:21","slug":"analysis-of-yoshki-et-al-observation-of-ultracold-neutron-production-by-9-angstrom-cold-neutrons-in-superfluid-helium","status":"publish","type":"post","link":"https:\/\/www.fruechtetheory.com\/blog\/2007\/10\/04\/analysis-of-yoshki-et-al-observation-of-ultracold-neutron-production-by-9-angstrom-cold-neutrons-in-superfluid-helium\/","title":{"rendered":"Analysis of: Yoshiki et al., Observation of Ultracold-Neutron Production by 9-Angstrom Cold Neutrons in Superfluid Helium, 1992"},"content":{"rendered":"<p>This represents an experiment where gravity is assumed to be the force that collects ultracold neutrons.\u00a0 In contrast to other gravity trap efforts where the effect is assumed, this particular experiment actually uses a UCN counter.\u00a0 Since neutrons are not pulled by gravity unless bound to a proton through the strong nuclear force, and with at least one electron in orbit, the only neutrons that should be expected at the counter at the bottom of the \u201cgravity acceleration tube\u201d are those which go into the tube by random, albeit straight, trajectory.\u00a0 Supporting this concept is the statement by Yoshiki et al.:\u00a0 \u201d(3) The poor ratio of the detected UCN to the expected UCN [3,21,22] in this experiment is not well understood.\u00a0 We are left with an unresolved attenuation factor of about 100 in order of magnitude.\u201d\u00a0 The paper suggests that this is due to \u201cbad conductance\u201d in the gravity tube which \u201cmight give rise to counterflow of UCN back to the container,\u201d.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This represents an experiment where gravity is assumed to be the force that collects ultracold neutrons.\u00a0 In contrast to other gravity trap efforts where the effect is assumed, this particular experiment actually uses a UCN counter.\u00a0 Since neutrons are not pulled by gravity unless bound to a proton through the strong nuclear force, and with [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-16","post","type-post","status-publish","format-standard","hentry","category-neutron-experimentation"],"_links":{"self":[{"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/posts\/16","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/comments?post=16"}],"version-history":[{"count":0,"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/posts\/16\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/media?parent=16"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/categories?post=16"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fruechtetheory.com\/blog\/wp-json\/wp\/v2\/tags?post=16"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}