A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Precision mass measurements of 67Fe and 69,70Co: Nuclear structure toward N = 40 and impact on r-process reaction rates (2020)

Canete, L., Giraud, S., Kankainen, A., Bastin, B., Nowacki, F., Poves, A., Ascher, P., Eronen, T., Alcindor, V., Jokinen, A., Khanam, A., Moore, I. D., Nesterenko, D. A., De Oliveira Santos, F., Penttilä, H., Petrone, C., Pohjalainen, I., de Roubin, A., Rubchenya, V. A., . . . Äystö, J. (2020). Precision mass measurements of 67Fe and 69,70Co: Nuclear structure toward N = 40 and impact on r-process reaction rates. Physical Review C, 101(4), Article 041304(R). https://doi.org/10.1103/PhysRevC.101.041304

JYU-tekijät tai -toimittajat

Canete, Laetitia
Kankainen, Anu
Eronen, Tommi
Jokinen, Ari
Moore, Iain
Nesterenko, Dmitrii
Penttilä, Heikki
Pohjalainen, Ilkka
de Roubin, Antoine
Rubchenya, Valeri
Vilén, Markus
Äystö, Juha

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Canete, L.; Giraud, S.; Kankainen, A.; Bastin, B.; Nowacki, F.; Poves, A.; Ascher, P.; Eronen, T.; Alcindor, V.; Jokinen, A.; et al.

Lehti tai sarja: Physical Review C

ISSN: 2469-9985

eISSN: 2469-9993

Julkaisuvuosi: 2020

Volyymi: 101

Lehden numero: 4

Artikkelinumero: 041304(R)

Kustantaja: American Physical Society

Julkaisumaa: Yhdysvallat (USA)

Julkaisun kieli: englanti

DOI: https://doi.org/10.1103/PhysRevC.101.041304

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/68641

Lisätietoja: See also: Erratum related to this article: Physical Review C 103, 029902 (2021); https://doi.org/10.1103/PhysRevC.103.029902

Tiivistelmä

Accurate mass measurements of neutron-rich iron and cobalt isotopes 67Fe and 69,70Co have been realized with the JYFLTRAP double Penning-trap mass spectrometer. With novel ion-manipulation techniques, the masses of the 69,70Co ground states and the 1/2− isomer in 69Co have been extracted for the first time. The measurements remove ambiguities in the previous mass values and yield a smoother trend on the mass surface, extending it beyond N=40. The moderate N=40 subshell gap has been found to weaken below 68Ni, a region known for shape coexistence and increased collectivity. The excitation energy for the 1/2− intruder state in 69Co has been determined for the first time and is compared to large-scale shell-model calculations. The new mass values also reduce significantly mass-related uncertainties for the astrophysical rapid neutron-capture process calculations.

YSO-asiasanat: hiukkasfysiikka; ydinfysiikka

Vapaat asiasanat: binding energy and masses; energy levels and level densities; nuclear astrophysics; nuclear structure and decays; r process

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