Single neutron transfer on Ne-23 and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21670%2F22%3A00364062" target="_blank" >RIV/68407700:21670/22:00364062 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.physletb.2022.137361" target="_blank" >https://doi.org/10.1016/j.physletb.2022.137361</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.physletb.2022.137361" target="_blank" >10.1016/j.physletb.2022.137361</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Single neutron transfer on Ne-23 and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts

Popis výsledku v původním jazyce

We present new experimental measurements of resonance strengths in the astrophysical Al-23(p, gamma)Si-24 reaction, constraining the pathway of nucleosynthesis beyond Mg-22 in X-ray burster scenarios. Specifically, we have performed the first measurement of the (d, p) reaction using a radioactive beam of Ne-23 to explore levels in Ne-24, the mirror analog of Si-24. Four strong single-particle states were observed and corresponding neutron spectroscopic factors were extracted with a precision of similar to 20%. Using these spectroscopic factors, together with mirror state identifications, we have reduced uncertainties in the strength of the key l = 0 resonance at E-r = 157 keV, in the astrophysical Al-23(p, gamma) reaction, by a factor of 4. Our results show that the Mg-22(p, gamma)Al-23(p, gamma) pathway dominates over the competing Mg-22(alpha, p) reaction in all but the most energetic X-ray burster events (T > 0.85 GK), significantly affecting energy production and the preservation of hydrogen fuel. (C) 2022 The Author(s). Published by Elsevier B.V.

Název v anglickém jazyce

Single neutron transfer on Ne-23 and its relevance for the pathway of nucleosynthesis in astrophysical X-ray bursts

Popis výsledku anglicky

We present new experimental measurements of resonance strengths in the astrophysical Al-23(p, gamma)Si-24 reaction, constraining the pathway of nucleosynthesis beyond Mg-22 in X-ray burster scenarios. Specifically, we have performed the first measurement of the (d, p) reaction using a radioactive beam of Ne-23 to explore levels in Ne-24, the mirror analog of Si-24. Four strong single-particle states were observed and corresponding neutron spectroscopic factors were extracted with a precision of similar to 20%. Using these spectroscopic factors, together with mirror state identifications, we have reduced uncertainties in the strength of the key l = 0 resonance at E-r = 157 keV, in the astrophysical Al-23(p, gamma) reaction, by a factor of 4. Our results show that the Mg-22(p, gamma)Al-23(p, gamma) pathway dominates over the competing Mg-22(alpha, p) reaction in all but the most energetic X-ray burster events (T > 0.85 GK), significantly affecting energy production and the preservation of hydrogen fuel. (C) 2022 The Author(s). Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10304 - Nuclear physics

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Physics Letters B

ISSN

0370-2693

e-ISSN

1873-2445

Svazek periodika

833

Číslo periodika v rámci svazku

OCT

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

1-5

Kód UT WoS článku

000865640700034

EID výsledku v databázi Scopus

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