{"id":2565,"date":"2018-11-21T08:00:59","date_gmt":"2018-11-21T08:00:59","guid":{"rendered":"http:\/\/tandetron.atomki.hu\/2018\/11\/21\/on-the-x17-light-particle-candidate-observed-in-nuclear-transitions\/"},"modified":"2020-09-30T10:32:55","modified_gmt":"2020-09-30T10:32:55","slug":"on-the-x17-light-particle-candidate-observed-in-nuclear-transitions","status":"publish","type":"post","link":"https:\/\/tandetron.atomki.hu\/en\/2018\/11\/21\/on-the-x17-light-particle-candidate-observed-in-nuclear-transitions\/","title":{"rendered":"On the X(17) light-particle candidate observed in nuclear transitions"},"content":{"rendered":"

[vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”PERIODICAL PUBLICATION” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#ffac03″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text]<\/p>\n

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A. J. Krasznahorkay,\u00a0M. Csatl\u00f3s, L. Csige, D. Firak,\u00a0J. Guly\u00e1s, Nagy, N. Sas,\u00a0J. Tim\u00e1r, T. G. Tornyi, A. Krasznahorkay<\/strong><\/span><\/p>\n

On the X(17) light-particle candidate observed in nuclear transitions.<\/em><\/strong><\/p>\n<\/div>\n

DOI:<\/strong> 10.5506\/APhysPolB.50.675<\/a><\/span><\/div>\n
<\/div>\n
Published:<\/strong><\/span> 21 November 2018<\/div>\n

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Abstract<\/span><\/strong><\/p>\n

\n

Recently, we observed anomalous internal pair creation for the M1 transition depopulating the 18.15 MeV isoscalar 1+<\/sup>\u00a0state in\u00a08<\/sup>Be. We observed a significant (\u03c3<\/i>\u00a0= 7.37) peak-like deviation from the predicted angular correlation of the e+<\/sup>\u00a0e pairs at\u00a0\u03b8<\/i>\u00a0= 140\u00b0. To the best of our knowledge no nuclear physics related description of such deviation can be made. However, the deviation can be described by assuming the creation and subsequent decay of a boson with mass of \u224817 MeV. In order to clarify the interpretation, we re-investigated the\u00a08<\/sup>Be anomaly with an improved, and independent setup. We have confirmed the signal of the assumed X(17) particle and constrained its mass (m<\/i>0<\/sub>c<\/i>2<\/sup>\u00a0= 17.01(16) MeV) and branching ratio compared to the \u03b3-decay (B<\/i>x<\/i><\/sub>\u00a0= 6(1)\u00a0\u00d7<\/b>\u00a010\u22126<\/sup>).<\/p>\n<\/div>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_btn title=”Return to the PERIODICAL PUBLICATION page” style=”outline-custom” outline_custom_color=”#000000″ outline_custom_hover_background=”#ffac03″ outline_custom_hover_text=”#ffffff” shape=”round” size=”sm” i_icon_fontawesome=”fas fa-arrow-left” add_icon=”true” link=”url:http%3A%2F%2Ftandetron.atomki.hu%2Fen%2Fpublications%2Fperiodical-publication%2F|title:Periodical%20publication”][\/vc_column][\/vc_row]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

[vc_row][vc_column][vc_custom_heading source=”post_title” font_container=”tag:h3|text_align:left” use_theme_fonts=”yes”][vc_text_separator title=”PERIODICAL PUBLICATION” title_align=”separator_align_left” color=”custom” style=”dotted” border_width=”2″ css_animation=”right-to-left” accent_color=”#ffac03″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text] A. J. Krasznahorkay,\u00a0M. Csatl\u00f3s, L. Csige, D. Firak,\u00a0J. Guly\u00e1s, Nagy, N. Sas,\u00a0J. Tim\u00e1r, T. [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":2101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[47],"tags":[],"class_list":["post-2565","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-periodical-publication"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/tandetron.atomki.hu\/wp-content\/uploads\/sites\/3\/2020\/06\/tandetron-folyoirat-publikacio-ikon.png?fit=1024%2C768&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/paFlKz-Fn","_links":{"self":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/2565","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/comments?post=2565"}],"version-history":[{"count":5,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/2565\/revisions"}],"predecessor-version":[{"id":2572,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/2565\/revisions\/2572"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/media\/2101"}],"wp:attachment":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/media?parent=2565"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/categories?post=2565"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/tags?post=2565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}