A new high-precision upper limit of direct α-decays from the Hoyle state in 12C

The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV inciden...
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Autor*in:	Dell’Aquila D. [verfasserIn] Lombardo I. [verfasserIn] Verde G. [verfasserIn] Vigilante M. [verfasserIn] Acosta L. [verfasserIn] Agodi C. [verfasserIn] Cappuzzello F. [verfasserIn] Carbone D. [verfasserIn] Cavallaro M. [verfasserIn] Cherubini S. [verfasserIn] Cvetinovic A. [verfasserIn] D’Agata G. [verfasserIn] Francalanza L. [verfasserIn] Guardo G.L. [verfasserIn] Gulino M. [verfasserIn] Indelicato I. [verfasserIn] La Cognata M. [verfasserIn] Lamia L. [verfasserIn] Ordine A. [verfasserIn] Pizzone R.G. [verfasserIn] Puglia S.M.R. [verfasserIn] Rapisarda G.G. [verfasserIn] Romano S. [verfasserIn] Santagati G. [verfasserIn] Spartà R. [verfasserIn] Spadaccini G. [verfasserIn] Spitaleri C. [verfasserIn] Tumino A. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2017

Übergeordnetes Werk:	In: EPJ Web of Conferences - EDP Sciences, 2010, 165, p 01020(2017)
Übergeordnetes Werk:	volume:165, p 01020 ; year:2017

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.1051/epjconf/201716501020

Katalog-ID:	DOAJ059696206

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allfields	10.1051/epjconf/201716501020 doi (DE-627)DOAJ059696206 (DE-599)DOAJe6a9fef7aefc4f6f90333adffd2e8011 DE-627 ger DE-627 rakwb eng QC1-999 Dell’Aquila D. verfasserin aut A new high-precision upper limit of direct α-decays from the Hoyle state in 12C 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised. Physics Lombardo I. verfasserin aut Verde G. verfasserin aut Vigilante M. verfasserin aut Acosta L. verfasserin aut Agodi C. verfasserin aut Cappuzzello F. verfasserin aut Carbone D. verfasserin aut Cavallaro M. verfasserin aut Cherubini S. verfasserin aut Cvetinovic A. verfasserin aut D’Agata G. verfasserin aut Francalanza L. verfasserin aut Guardo G.L. verfasserin aut Gulino M. verfasserin aut Indelicato I. verfasserin aut La Cognata M. verfasserin aut Lamia L. verfasserin aut Ordine A. verfasserin aut Pizzone R.G. verfasserin aut Puglia S.M.R. verfasserin aut Rapisarda G.G. verfasserin aut Romano S. verfasserin aut Santagati G. verfasserin aut Spartà R. verfasserin aut Spadaccini G. verfasserin aut Spitaleri C. verfasserin aut Tumino A. verfasserin aut In EPJ Web of Conferences EDP Sciences, 2010 165, p 01020(2017) (DE-627)647306611 (DE-600)2595425-8 2100014X nnns volume:165, p 01020 year:2017 https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 kostenfrei https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/toc/2100-014X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 165, p 01020 2017
spelling	10.1051/epjconf/201716501020 doi (DE-627)DOAJ059696206 (DE-599)DOAJe6a9fef7aefc4f6f90333adffd2e8011 DE-627 ger DE-627 rakwb eng QC1-999 Dell’Aquila D. verfasserin aut A new high-precision upper limit of direct α-decays from the Hoyle state in 12C 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised. Physics Lombardo I. verfasserin aut Verde G. verfasserin aut Vigilante M. verfasserin aut Acosta L. verfasserin aut Agodi C. verfasserin aut Cappuzzello F. verfasserin aut Carbone D. verfasserin aut Cavallaro M. verfasserin aut Cherubini S. verfasserin aut Cvetinovic A. verfasserin aut D’Agata G. verfasserin aut Francalanza L. verfasserin aut Guardo G.L. verfasserin aut Gulino M. verfasserin aut Indelicato I. verfasserin aut La Cognata M. verfasserin aut Lamia L. verfasserin aut Ordine A. verfasserin aut Pizzone R.G. verfasserin aut Puglia S.M.R. verfasserin aut Rapisarda G.G. verfasserin aut Romano S. verfasserin aut Santagati G. verfasserin aut Spartà R. verfasserin aut Spadaccini G. verfasserin aut Spitaleri C. verfasserin aut Tumino A. verfasserin aut In EPJ Web of Conferences EDP Sciences, 2010 165, p 01020(2017) (DE-627)647306611 (DE-600)2595425-8 2100014X nnns volume:165, p 01020 year:2017 https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 kostenfrei https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/toc/2100-014X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 165, p 01020 2017
allfields_unstemmed	10.1051/epjconf/201716501020 doi (DE-627)DOAJ059696206 (DE-599)DOAJe6a9fef7aefc4f6f90333adffd2e8011 DE-627 ger DE-627 rakwb eng QC1-999 Dell’Aquila D. verfasserin aut A new high-precision upper limit of direct α-decays from the Hoyle state in 12C 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised. Physics Lombardo I. verfasserin aut Verde G. verfasserin aut Vigilante M. verfasserin aut Acosta L. verfasserin aut Agodi C. verfasserin aut Cappuzzello F. verfasserin aut Carbone D. verfasserin aut Cavallaro M. verfasserin aut Cherubini S. verfasserin aut Cvetinovic A. verfasserin aut D’Agata G. verfasserin aut Francalanza L. verfasserin aut Guardo G.L. verfasserin aut Gulino M. verfasserin aut Indelicato I. verfasserin aut La Cognata M. verfasserin aut Lamia L. verfasserin aut Ordine A. verfasserin aut Pizzone R.G. verfasserin aut Puglia S.M.R. verfasserin aut Rapisarda G.G. verfasserin aut Romano S. verfasserin aut Santagati G. verfasserin aut Spartà R. verfasserin aut Spadaccini G. verfasserin aut Spitaleri C. verfasserin aut Tumino A. verfasserin aut In EPJ Web of Conferences EDP Sciences, 2010 165, p 01020(2017) (DE-627)647306611 (DE-600)2595425-8 2100014X nnns volume:165, p 01020 year:2017 https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 kostenfrei https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/toc/2100-014X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 165, p 01020 2017
allfieldsGer	10.1051/epjconf/201716501020 doi (DE-627)DOAJ059696206 (DE-599)DOAJe6a9fef7aefc4f6f90333adffd2e8011 DE-627 ger DE-627 rakwb eng QC1-999 Dell’Aquila D. verfasserin aut A new high-precision upper limit of direct α-decays from the Hoyle state in 12C 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised. Physics Lombardo I. verfasserin aut Verde G. verfasserin aut Vigilante M. verfasserin aut Acosta L. verfasserin aut Agodi C. verfasserin aut Cappuzzello F. verfasserin aut Carbone D. verfasserin aut Cavallaro M. verfasserin aut Cherubini S. verfasserin aut Cvetinovic A. verfasserin aut D’Agata G. verfasserin aut Francalanza L. verfasserin aut Guardo G.L. verfasserin aut Gulino M. verfasserin aut Indelicato I. verfasserin aut La Cognata M. verfasserin aut Lamia L. verfasserin aut Ordine A. verfasserin aut Pizzone R.G. verfasserin aut Puglia S.M.R. verfasserin aut Rapisarda G.G. verfasserin aut Romano S. verfasserin aut Santagati G. verfasserin aut Spartà R. verfasserin aut Spadaccini G. verfasserin aut Spitaleri C. verfasserin aut Tumino A. verfasserin aut In EPJ Web of Conferences EDP Sciences, 2010 165, p 01020(2017) (DE-627)647306611 (DE-600)2595425-8 2100014X nnns volume:165, p 01020 year:2017 https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 kostenfrei https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/toc/2100-014X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 165, p 01020 2017
allfieldsSound	10.1051/epjconf/201716501020 doi (DE-627)DOAJ059696206 (DE-599)DOAJe6a9fef7aefc4f6f90333adffd2e8011 DE-627 ger DE-627 rakwb eng QC1-999 Dell’Aquila D. verfasserin aut A new high-precision upper limit of direct α-decays from the Hoyle state in 12C 2017 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised. Physics Lombardo I. verfasserin aut Verde G. verfasserin aut Vigilante M. verfasserin aut Acosta L. verfasserin aut Agodi C. verfasserin aut Cappuzzello F. verfasserin aut Carbone D. verfasserin aut Cavallaro M. verfasserin aut Cherubini S. verfasserin aut Cvetinovic A. verfasserin aut D’Agata G. verfasserin aut Francalanza L. verfasserin aut Guardo G.L. verfasserin aut Gulino M. verfasserin aut Indelicato I. verfasserin aut La Cognata M. verfasserin aut Lamia L. verfasserin aut Ordine A. verfasserin aut Pizzone R.G. verfasserin aut Puglia S.M.R. verfasserin aut Rapisarda G.G. verfasserin aut Romano S. verfasserin aut Santagati G. verfasserin aut Spartà R. verfasserin aut Spadaccini G. verfasserin aut Spitaleri C. verfasserin aut Tumino A. verfasserin aut In EPJ Web of Conferences EDP Sciences, 2010 165, p 01020(2017) (DE-627)647306611 (DE-600)2595425-8 2100014X nnns volume:165, p 01020 year:2017 https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 kostenfrei https://doi.org/10.1051/epjconf/201716501020 kostenfrei https://doaj.org/toc/2100-014X Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_206 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2005 GBV_ILN_2009 GBV_ILN_2011 GBV_ILN_2014 GBV_ILN_2055 GBV_ILN_2111 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4335 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 165, p 01020 2017
language	English
source	In EPJ Web of Conferences 165, p 01020(2017) volume:165, p 01020 year:2017
sourceStr	In EPJ Web of Conferences 165, p 01020(2017) volume:165, p 01020 year:2017
format_phy_str_mv	Article
institution	findex.gbv.de
topic_facet	Physics
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container_title	EPJ Web of Conferences
authorswithroles_txt_mv	Dell’Aquila D. @@aut@@ Lombardo I. @@aut@@ Verde G. @@aut@@ Vigilante M. @@aut@@ Acosta L. @@aut@@ Agodi C. @@aut@@ Cappuzzello F. @@aut@@ Carbone D. @@aut@@ Cavallaro M. @@aut@@ Cherubini S. @@aut@@ Cvetinovic A. @@aut@@ D’Agata G. @@aut@@ Francalanza L. @@aut@@ Guardo G.L. @@aut@@ Gulino M. @@aut@@ Indelicato I. @@aut@@ La Cognata M. @@aut@@ Lamia L. @@aut@@ Ordine A. @@aut@@ Pizzone R.G. @@aut@@ Puglia S.M.R. @@aut@@ Rapisarda G.G. @@aut@@ Romano S. @@aut@@ Santagati G. @@aut@@ Spartà R. @@aut@@ Spadaccini G. @@aut@@ Spitaleri C. @@aut@@ Tumino A. @@aut@@
publishDateDaySort_date	2017-01-01T00:00:00Z
hierarchy_top_id	647306611
id	DOAJ059696206
language_de	englisch
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callnumber-first	Q - Science
author	Dell’Aquila D.
spellingShingle	Dell’Aquila D. misc QC1-999 misc Physics A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
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topic_title	QC1-999 A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
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title	A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
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title_full	A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
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author_browse	Dell’Aquila D. Lombardo I. Verde G. Vigilante M. Acosta L. Agodi C. Cappuzzello F. Carbone D. Cavallaro M. Cherubini S. Cvetinovic A. D’Agata G. Francalanza L. Guardo G.L. Gulino M. Indelicato I. La Cognata M. Lamia L. Ordine A. Pizzone R.G. Puglia S.M.R. Rapisarda G.G. Romano S. Santagati G. Spartà R. Spadaccini G. Spitaleri C. Tumino A.
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title_sort	new high-precision upper limit of direct α-decays from the hoyle state in 12c
callnumber	QC1-999
title_auth	A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
abstract	The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised.
abstractGer	The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised.
abstract_unstemmed	The Hoyle state in 12C(Ex = 7.654MeV) is characterized by a pronounced 3α cluster configuration. It is involved in the so-called 3α process in stars, that is responsible of 12C nucleosynthesis. We studied the decay path of the Hoyle state by using the 14N(d, α2)12C(7.654) reaction at 10.5MeV incident energy. We found, with a precision higher of a factor 5 than any other previous experiment, an almost total absence of direct decays by-passing the ground state of 8Be. A new upper limit of such a decay width is placed at 0.043% (95% C.L.). Astrophysical 3α process reaction rate calculations have to be consequently revised.
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title_short	A new high-precision upper limit of direct α-decays from the Hoyle state in 12C
url	https://doi.org/10.1051/epjconf/201716501020 https://doaj.org/article/e6a9fef7aefc4f6f90333adffd2e8011 https://doaj.org/toc/2100-014X
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author2	Lombardo I. Verde G. Vigilante M. Acosta L. Agodi C. Cappuzzello F. Carbone D. Cavallaro M. Cherubini S. Cvetinovic A. D’Agata G. Francalanza L. Guardo G.L. Gulino M. Indelicato I. La Cognata M. Lamia L. Ordine A. Pizzone R.G. Puglia S.M.R. Rapisarda G.G. Romano S. Santagati G. Spartà R. Spadaccini G. Spitaleri C. Tumino A.
author2Str	Lombardo I. Verde G. Vigilante M. Acosta L. Agodi C. Cappuzzello F. Carbone D. Cavallaro M. Cherubini S. Cvetinovic A. D’Agata G. Francalanza L. Guardo G.L. Gulino M. Indelicato I. La Cognata M. Lamia L. Ordine A. Pizzone R.G. Puglia S.M.R. Rapisarda G.G. Romano S. Santagati G. Spartà R. Spadaccini G. Spitaleri C. Tumino A.
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A new high-precision upper limit of direct α-decays from the Hoyle state in 12C

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