New astrophysical S factor for the N-15(p,gamma)O-16 reaction via the asymptotic normalization coefficient (ANC) method

Result code in IS VaVaI

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Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

New astrophysical S factor for the N-15(p,gamma)O-16 reaction via the asymptotic normalization coefficient (ANC) method

Original language description

The N-15(p,gamma)O-16 reaction provides a path from the CN cycle to the CNO bi-cycle and CNO tri-cycle. The measured astrophysical factor for this reaction is dominated by resonant capture through two strong J(pi) = 1(-) resonances at E-R = 312 and 962 keV and direct capture to the ground state. Asymptotic normalization coefficients (ANCs) for the ground and seven excited states in O-16 were extracted from the comparison of experimental differential cross sections for the N-15(He-3,d)O-16 reaction withdistorted-wave Born approximation calculations. Using these ANCs and proton and alpha resonance widths determined from an R-matrix fit to the data from the N-15(p,alpha)C-12 reaction, we carried out an R-matrix calculation to obtain the astrophysical factor for the N-15(p,gamma)O-16 reaction. The results indicate that the direct capture contribution was previously overestimated.

Czech name

Nový astrofyzikální S faktor pro reakci 15N(p,gama)16-O metodou asymptotických normalizačních koeficientů

Czech description

Z naměřených úhlových rozložení byly pomocí výpočtů DWBA určeny ANC pro přímý záchyt. Dále byly provedeny výpočty v rámci R-maticové teorie a získán celkový astrofyzikální faktor reakce 15N(p,gama )16O zahrnující rezonanční i nerezonanční proces.

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BG - Nuclear, atomic and molecular physics, accelerators

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review. C

ISSN

0556-2813

e-ISSN

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Volume of the periodical

78

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

8

Pages from-to

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UT code for WoS article

000258636200068

EID of the result in the Scopus database

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