Matches in SemOpenAlex for { <https://semopenalex.org/work/W2068907975> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W2068907975 abstract "The ${}^{22}mathrm{Ne}(ensuremath{alpha},n)$ reaction is the main neutron source for neutron capture nucleosynthesis $(s$ process) in massive stars and plays also a significant role for the s process in thermally pulsing asymptotic giant branch stars. In these scenarios, ${}^{22}mathrm{Ne}$ is produced by the reaction sequence ${}^{14}mathrm{N}(ensuremath{alpha},ensuremath{gamma}{)}^{18}mathrm{F}({ensuremath{beta}}^{+}{)}^{18}mathrm{O}(ensuremath{alpha},ensuremath{gamma}{)}^{22}mathrm{Ne}.$ While the first reaction is well understood, ensuremath{alpha} capture on ${}^{18}mathrm{O}$ was affected by considerable uncertainties. At the temperatures of stellar He burning, the reaction rate is determined by two resonances at ensuremath{alpha} energies of 470 and 566 keV. Since these resonances were not yet successfully measured, the rates had to be based on estimated resonance strengths. In the present work, the first direct measurement of the partial strengths of these extremely weak low-energy resonances is reported. The use of a high-efficiency segmented Ge detector in coincidence with bismuth germanate oxide counters covering a large solid angle led to a significantly improved experimental sensitivity, thus allowing for the clear identification of specific ensuremath{gamma} transitions. As a result, resonance strengths of 0.71ifmmodepmelsetextpmfi{}0.17 ensuremath{mu}eV and 0.48ifmmodepmelsetextpmfi{}0.16 ensuremath{mu}eV could be obtained for the 566- and 470-keV resonances, respectively. When compared to the previously reported upper limits of ensuremath{leqslant}1.7 ensuremath{mu}eV, these results provide a reliable basis for the determination of the reaction rate during stellar He burning. Accordingly, these data reduce the uncertainties in the s process neutron balance." @default.
- W2068907975 created "2016-06-24" @default.
- W2068907975 creator A5022537620 @default.
- W2068907975 creator A5047902063 @default.
- W2068907975 creator A5060471675 @default.
- W2068907975 creator A5065101632 @default.
- W2068907975 creator A5074433252 @default.
- W2068907975 creator A5082123083 @default.
- W2068907975 creator A5086573180 @default.
- W2068907975 date "2003-08-12" @default.
- W2068907975 modified "2023-09-25" @default.
- W2068907975 title "Stellar He burning of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msup><mml:mrow /><mml:mrow><mml:mn>18</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant=normal>O</mml:mi><mml:mo>:</mml:mo></mml:math>A measurement of low-energy resonances and their astrophysical implications" @default.
- W2068907975 cites W130491248 @default.
- W2068907975 cites W1971108842 @default.
- W2068907975 cites W1981794558 @default.
- W2068907975 cites W1981913422 @default.
- W2068907975 cites W1986458813 @default.
- W2068907975 cites W1989673590 @default.
- W2068907975 cites W1995724985 @default.
- W2068907975 cites W2029303084 @default.
- W2068907975 cites W2077403794 @default.
- W2068907975 cites W2080189619 @default.
- W2068907975 cites W2080591056 @default.
- W2068907975 cites W2089679076 @default.
- W2068907975 cites W2119095722 @default.
- W2068907975 cites W2129163306 @default.
- W2068907975 cites W2133396813 @default.
- W2068907975 cites W2148583944 @default.
- W2068907975 cites W2172190484 @default.
- W2068907975 cites W2244913266 @default.
- W2068907975 cites W2268985040 @default.
- W2068907975 cites W3022214567 @default.
- W2068907975 cites W87875943 @default.
- W2068907975 doi "https://doi.org/10.1103/physrevc.68.025801" @default.
- W2068907975 hasPublicationYear "2003" @default.
- W2068907975 type Work @default.
- W2068907975 sameAs 2068907975 @default.
- W2068907975 citedByCount "30" @default.
- W2068907975 countsByYear W20689079752012 @default.
- W2068907975 countsByYear W20689079752013 @default.
- W2068907975 countsByYear W20689079752014 @default.
- W2068907975 countsByYear W20689079752015 @default.
- W2068907975 countsByYear W20689079752016 @default.
- W2068907975 countsByYear W20689079752019 @default.
- W2068907975 countsByYear W20689079752021 @default.
- W2068907975 countsByYear W20689079752022 @default.
- W2068907975 countsByYear W20689079752023 @default.
- W2068907975 crossrefType "journal-article" @default.
- W2068907975 hasAuthorship W2068907975A5022537620 @default.
- W2068907975 hasAuthorship W2068907975A5047902063 @default.
- W2068907975 hasAuthorship W2068907975A5060471675 @default.
- W2068907975 hasAuthorship W2068907975A5065101632 @default.
- W2068907975 hasAuthorship W2068907975A5074433252 @default.
- W2068907975 hasAuthorship W2068907975A5082123083 @default.
- W2068907975 hasAuthorship W2068907975A5086573180 @default.
- W2068907975 hasConcept C41008148 @default.
- W2068907975 hasConceptScore W2068907975C41008148 @default.
- W2068907975 hasIssue "2" @default.
- W2068907975 hasLocation W20689079751 @default.
- W2068907975 hasOpenAccess W2068907975 @default.
- W2068907975 hasPrimaryLocation W20689079751 @default.
- W2068907975 hasRelatedWork W2093578348 @default.
- W2068907975 hasRelatedWork W2350741829 @default.
- W2068907975 hasRelatedWork W2358668433 @default.
- W2068907975 hasRelatedWork W2376932109 @default.
- W2068907975 hasRelatedWork W2382290278 @default.
- W2068907975 hasRelatedWork W2390279801 @default.
- W2068907975 hasRelatedWork W2748952813 @default.
- W2068907975 hasRelatedWork W2766271392 @default.
- W2068907975 hasRelatedWork W2899084033 @default.
- W2068907975 hasRelatedWork W3004735627 @default.
- W2068907975 hasVolume "68" @default.
- W2068907975 isParatext "false" @default.
- W2068907975 isRetracted "false" @default.
- W2068907975 magId "2068907975" @default.
- W2068907975 workType "article" @default.