Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Resonance strengths in the 14N( p,γ)15O astrophysical key reaction measured with activation
Institute for Nuclear Research (Atomki), Debrecen, Hungary.
Institute for Nuclear Research (Atomki), Debrecen, Hungary.
Institute for Nuclear Research (Atomki), Debrecen, Hungary.
Institute for Nuclear Research (Atomki), Debrecen, Hungary.
Show others and affiliations
2019 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 100, no 1, article id 015805Article in journal (Refereed) Published
Abstract [en]

Background: The 14N(p,γ)15O reaction plays a vital role in various astrophysical scenarios. Its reaction rate must be accurately known in the present era of high precision astrophysics. The cross section of the reaction is often measured relative to a low energy resonance, the strength of which must therefore be determined precisely.

Purpose: The activation method, based on the measurement of 15O decay, has not been used in modern measurements of the 14N(p,γ)15O reaction. The aim of the present work is to provide strength data for two resonances in the 14N(p,γ)15O reaction using the activation method. The obtained values are largely independent from previous data measured by in-beam γ spectroscopy and are free from some of their systematic uncertainties.

Method: Solid state TiN targets were irradiated with a proton beam provided by the Tandetron accelerator of Atomki using a cyclic activation. The decay of the produced 15O isotopes was measured by detecting the 511 keV positron annihilation γ rays.

Results: The strength of the Ep=278keV resonance was measured to be ωγ278=(13.4±0.8)meVwhile for the Ep=1058keV resonance ωγ1058=(442±27)meV.

Conclusions: The obtained Ep=278 keV resonance strength is in fair agreement with the values recommended by two recent works. However, the Ep=1058keV resonance strength is about 20% higher than the previous value. The discrepancy may be caused in part by a previously neglected finite target thickness correction. As only the low energy resonance is used as a normalization point for cross section measurements, the calculated astrophysical reaction rate of the 14N(p,γ)15O reaction and therefore the astrophysical consequences are not changed by the present results.

Place, publisher, year, edition, pages
American Physical Society, 2019. Vol. 100, no 1, article id 015805
National Category
Other Physics Topics
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-75596DOI: 10.1103/PhysRevC.100.015805ISI: 000477894400008Scopus ID: 2-s2.0-85069895597OAI: oai:DiVA.org:ltu-75596DiVA, id: diva2:1344152
Note

Validerad;2019;Nivå 2;2019-08-20 (johcin)

Available from: 2019-08-20 Created: 2019-08-20 Last updated: 2019-08-21Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records BETA

Gilzad Kohan, Mojtaba

Search in DiVA

By author/editor
Gilzad Kohan, Mojtaba
By organisation
Material Science
In the same journal
Physical Review C. Nuclear Physics
Other Physics Topics

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 5 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf