A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Mass measurements of neutron-rich A≈90 nuclei constrain element abundances (2024)
Xian, W., Chen, S., Nikas, S., Rosenbusch, M., Wada, M., Ishiyama, H., Hou, D., Iimura, S., Nishimura, S., Schury, P., Takamine, A., Yan, S., Browne, F., Doornenbal, P., Flavigny, F., Hirayama, Y., Ito, Y., Kimura, S., Kojima T., M., . . . Wollnik, H. (2024). Mass measurements of neutron-rich A≈90 nuclei constrain element abundances. Physical Review C, 109(3), Article 035804. https://doi.org/10.1103/PhysRevC.109.035804
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Xian, W.; Chen, S.; Nikas, S.; Rosenbusch, M.; Wada, M.; Ishiyama, H.; Hou, D.; Iimura, S.; Nishimura, S.; Schury, P.; et al.
Lehti tai sarja: Physical Review C
ISSN: 2469-9985
eISSN: 2469-9993
Julkaisuvuosi: 2024
Ilmestymispäivä: 18.03.2024
Volyymi: 109
Lehden numero: 3
Artikkelinumero: 035804
Kustantaja: American Physical Society (APS)
Julkaisumaa: Yhdysvallat (USA)
Julkaisun kieli: englanti
DOI: https://doi.org/10.1103/PhysRevC.109.035804
Julkaisun avoin saatavuus: Ei avoin
Julkaisukanavan avoin saatavuus:
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/95081
Tiivistelmä
Atomic masses of the neutron-rich isotopes 83,84Ga, 82–86Ge, 82–89As, 82,84–91Se, 85,86,89–92Br, 89,91,92Kr, and 91Rb have been measured with high precision and accuracy using the multi-reflection time-of-flight mass spectrograph at the RIBF facility. The masses of 88,89As were measured for the first time and the mass uncertainties of 86Ge and 90,91Se were significantly reduced from several hundred keV to below the 10 keV scale. Investigation of shell evolution and potential subshell closures are proceeded by analysis of two-neutron separation energy systematics. As a result of the precise mass measurements, no prominent change on the slope of the two-neutron separation energy beyond N=56 is observed in Se isotopes, indicating the subshell closure effect at N=56 of Se does not exist. Also, various leading mass models are compared with the measurements. The impact of the more precisely known data on r-process nucleosynthesis calculations is investigated in light of these new mass measurements, showing a remarkable reduction of reaction-rate uncertainties.
YSO-asiasanat: isotoopit; massaspektrometria; massaspektrografia; ydinfysiikka
Liittyvät organisaatiot
Hankkeet, joissa julkaisu on tehty
- Masses, Isomers and Decay Studies for Elemental Nucleosynthesis
- Kankainen, Anu
- Euroopan komissio
OKM-raportointi: Kyllä
Raportointivuosi: 2024
Alustava JUFO-taso: 2