{"id":3106,"date":"2023-02-08T08:00:52","date_gmt":"2023-02-08T08:00:52","guid":{"rendered":"https:\/\/tandetron.atomki.hu\/2023\/01\/27\/cross-section-measurement-of-the-144sm%ce%b1n147gd-reaction-for-studying-the-%ce%b1-nucleus-optical-potential-at-astrophysical-energies\/"},"modified":"2023-04-06T11:22:08","modified_gmt":"2023-04-06T11:22:08","slug":"cross-section-measurement-of-the-144sm%ce%b1n147gd-reaction-for-studying-the-%ce%b1-nucleus-optical-potential-at-astrophysical-energies","status":"publish","type":"post","link":"https:\/\/tandetron.atomki.hu\/en\/2023\/02\/08\/cross-section-measurement-of-the-144sm%ce%b1n147gd-reaction-for-studying-the-%ce%b1-nucleus-optical-potential-at-astrophysical-energies\/","title":{"rendered":"Cross section measurement of the 144<\/sup>Sm(\u03b1,n)147<\/sup>Gd reaction for studying the \u03b1-nucleus optical potential at astrophysical energies"},"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 PUBLICATIONS” 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]Gy. Gy\u00fcrky, P. Mohr, A. Angyal, Z. Hal\u00e1sz, G.G. Kiss, Zs. M\u00e1tyus, T.N. Szegedi, T. Sz\u00fccs, Zs. F\u00fcl\u00f6p:
\nCross section measurement of the 144<\/sup>Sm(\u03b1,n)147<\/sup>Gd reaction for studying the \u03b1-nucleus optical potential at astrophysical energies<\/i>
\nPhysical Review C 107 (2023) 025803<\/b><\/span><\/p>\n

DOI: https:\/\/doi.org\/10.1103\/PhysRevC.107.025803<\/a><\/strong><\/span><\/p>\n

Published:<\/strong><\/span> 8 February 2023[\/vc_column_text][vc_column_text]Abstract<\/strong><\/span><\/p>\n

Background:<\/span><\/span> Nuclear reactions involving \u03b1 particles play an important role in various astrophysical processes such as the \u03b3 process of heavy element nucleosynthesis. The poorly known low-energy \u03b1-nucleus optical potential is a key parameter to estimate the rates of these reactions.<\/p>\n

Purpose:<\/span> The \u03b1-nucleus optical potential can be tested by measuring the cross section\u00a0of \u03b1scattering as well as \u03b1-induced reactions. Low energy elastic \u03b1 scattering on 144<\/sup>Sm has recently been measured with high precision. The aim of the present work was to complement that work by measuring the (\u03b1,n) cross sections\u00a0on 144<\/sup>Sm at low energies. The experimental data shall be used to constrain the \u03b1-nucleus optical model potential. From this potential the 144<\/sup>Sm(\u03b1,\u03b3)148<\/sup>Gd reaction rate can be derived with reduced uncertainties.<\/p>\n

Method:<\/span> The 144<\/sup>Sm(\u03b1,n)147<\/sup>Gd reaction was studied by bombarding Sm targets with \u03b1 beams provided by the cyclotron accelerator of Atomki. The cross section\u00a0was determined using the activation method. The \u03b3 radiation following the decay of the 147Gd reaction product was measured with a high-purity germanium (HPGe) detector. The experimental data are analyzed within the statistical model.<\/p>\n

Results:<\/span> The cross section\u00a0was measured in the \u03b1-energy range between 13 and 20 MeV in 1 MeV steps, i.e., from close above the (\u03b1,n) threshold. The results were compared with statistical model calculations using various approaches and parametrizations for the \u03b1-nucleus optical potential, and excellent agreement was obtained for two recent potentials. However, these potentials cannot reproduce literature data for the 144<\/sup>Sm(\u03b1,\u03b3)148<\/sup>Gd reaction with the same accuracy.<\/p>\n

Conclusions<\/span>:<\/span> Constraints for the \u03b1-nucleus potential were derived from an analysis of the new 144<\/sup>Sm(\u03b1,n)147<\/sup>Gd data and literature data for 144<\/sup>Sm(\u03b1,\u03b3)148<\/sup>Gd. These constraints enable a determination of the reaction rate of the 144<\/sup>Sm(\u03b1,\u03b3)148<\/sup>Gd reaction with significantly reduced uncertainties of less than a factor of 2.[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_btn title=”Back to PERIODICAL PUBLICATIONS 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:https%3A%2F%2Ftandetron.atomki.hu%2Fen%2Fr-d%2Fpublications%2Fperiodical-publications%2F|title:Foly%C3%B3irat%20publik%C3%A1ci%C3%B3″][\/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 PUBLICATIONS” 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]Gy. Gy\u00fcrky, P. Mohr, A. Angyal, Z. Hal\u00e1sz, G.G. Kiss, Zs. M\u00e1tyus, T.N. Szegedi, T. [\u2026]<\/span><\/p>\n","protected":false},"author":1,"featured_media":2214,"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-3106","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-periodical-publication-ikon.png?fit=1024%2C768&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/paFlKz-O6","_links":{"self":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/3106","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=3106"}],"version-history":[{"count":3,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/3106\/revisions"}],"predecessor-version":[{"id":3109,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/posts\/3106\/revisions\/3109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/media\/2214"}],"wp:attachment":[{"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/media?parent=3106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/categories?post=3106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tandetron.atomki.hu\/en\/wp-json\/wp\/v2\/tags?post=3106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}