A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
First observation of high-K isomeric states in 249Md and 251Md (2021)

Goigoux, T., Theisen, Ch., Sulignano, B., Airiau, M., Auranen, K., Badran, H., Briselet, R., Calverley, T., Cox, D., Déchery, F., Defranchi Bisso, F., Drouart, A., Favier, Z., Gall, B., Grahn, T., Greenlees, P. T., Hauschild, K., Herzáň, A., Herzberg, R.-D., . . . Skalski, J. (2021). First observation of high-K isomeric states in 249Md and 251Md. European Physical Journal A, 57(12), Article 321. https://doi.org/10.1140/epja/s10050-021-00631-4

JYU-tekijät tai -toimittajat

Julkaisun tiedot

Julkaisun kaikki tekijät tai toimittajat: Goigoux, T.; Theisen, Ch.; Sulignano, B.; Airiau, M.; Auranen, K.; Badran, H.; Briselet, R.; Calverley, T.; Cox, D.; Déchery, F.; et al.

Lehti tai sarja: European Physical Journal A

ISSN: 1434-6001

eISSN: 1434-601X

Julkaisuvuosi: 2021

Volyymi: 57

Lehden numero: 12

Artikkelinumero: 321

Kustantaja: Springer Science and Business Media LLC

Julkaisumaa: Saksa

Julkaisun kieli: englanti

DOI: https://doi.org/10.1140/epja/s10050-021-00631-4

Julkaisun avoin saatavuus: Ei avoin

Julkaisukanavan avoin saatavuus:

Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/79260

Julkaisu on rinnakkaistallennettu: https://arxiv.org/abs/2107.00517

Tiivistelmä

Decay spectroscopy of the odd-proton nuclei 249Md and 251Md has been performed. High-K isomeric states were identified for the first time in these two nuclei through the measurement of their electromagnetic decay. An isomeric state with a half-life of 2.8(5) ms and an excitation energy ≥910 keV was found in 249Md. In 251Md, an isomeric state with a half-life of 1.4(3) s and an excitation energy ≥844 keV was found. Similarly to the neighbouring 255Lr, these two isomeric states are interpreted as 3 quasi-particle high-K states and compared to new theoretical calculations. Excited nuclear configurations were calculated within two scenarios: via blocking nuclear states located in proximity to the Fermi surface or/and using the quasiparticle Bardeen–Cooper–Schrieffer method. Relevant states were selected on the basis of the microscopic-macroscopic model with a deformed Woods–Saxon potential. The most probable candidates for the configurations of K-isomeric states in Md nuclei are proposed.

YSO-asiasanat: ydinfysiikka; isomeria; puoliintumisaika

Liittyvät organisaatiot

OKM-raportointi: Kyllä

Raportointivuosi: 2021

JUFO-taso: 1