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Discovery of an Exceptionally Strong β-Decay Transition of 20F and Implications for the Fate of Intermediate-Mass Stars (2019)

Kirsebom, O., Jones, S., Strömberg, D. F., Martínez-Pinedo, G., Langanke, K., Röpke, F., Brown, B., Eronen, T., Fynbo, H., Hukkanen, M., Idini, A., Jokinen, A., Kankainen, A., Kostensalo, J., Moore, I., Möller, H., Ohlmann, S., Penttilä, H., Riisager, K., . . . Äystö, J. (2019). Discovery of an Exceptionally Strong β-Decay Transition of 20F and Implications for the Fate of Intermediate-Mass Stars. Physical Review Letters, 123(26), Article 262701. https://doi.org/10.1103/PhysRevLett.123.262701

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Kirsebom, O. S.; Jones, S.; Strömberg, D. F.; Martínez-Pinedo, G.; Langanke, K.; Röpke, F. K.; Brown, B. A.; Eronen, T.; Fynbo, H. O. U.; Hukkanen, M.; et al.

Lehti tai sarja: Physical Review Letters

ISSN: 0031-9007

eISSN: 1079-7114

Julkaisuvuosi: 2019

Volyymi: 123

Lehden numero: 26

Artikkelinumero: 262701

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevLett.123.262701

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/67383


A significant fraction of stars between 7 and 11 solar masses are thought to become supernovae, but the explosion mechanism is unclear. The answer depends critically on the rate of electron capture on 20Ne in the degenerate oxygen-neon stellar core. However, because of the unknown strength of the transition between the ground states of 20Ne and 20F, it has not previously been possible to fully constrain the rate. By measuring the transition, we establish that its strength is exceptionally large and that it enhances the capture rate by several orders of magnitude. This has a decisive impact on the evolution of the core, increasing the likelihood that the star is (partially) disrupted by a thermonuclear explosion rather than collapsing to form a neutron star. Importantly, our measurement resolves the last remaining nuclear physics uncertainty in the final evolution of degenerate oxygen-neon stellar cores, allowing future studies to address the critical role of convection, which at present is poorly understood.

YSO-asiasanat: ydinfysiikka; astrofysiikka; tähdet

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OKM-raportointi: Kyllä

Raportointivuosi: 2019

JUFO-taso: 3

Viimeisin päivitys 2021-25-08 klo 12:39