Spectroscopy and single-particle structure of the odd-Z heavy elements $^{255}$Lr, $^{251}$Md and $^{247}$Es

Spectroscopy and single-particle structure of the odd-Z heavy elements $^{255}$Lr, $^{251}$Md and $^{247}$Es

The odd-Z isotope 255Lr, its daughter 251Md and grand-daughter 247Es were studied in two experiments performed at GANIL and the University of Jyväskylä. The 255Lr nuclei were produced using the cold fusion-evaporation reaction 209Bi(48Ca, 2n)255Lr at a bombarding energy of 217MeV. The single-particl...

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Veröffentlicht in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2006-11, Vol.30, p.397-411
Hauptverfasser: Chatillon, A., Theisen, Ch, Greenlees, P.T., Auger, G., Bastin, J.E., Bouchez, E., Bouriquet, B., Casandjian, J.M., Cee, R., Clément, E., Dayras, R., de France, G., de Tourreil, R., Eeckhaudt, S., Görgen, A., Grahn, T., Grévy, S., Hauschild, K., Herzberg, R.-D., Ikin, P.J.C., Jones, G.D., Jones, P., Julin, R., Juutinen, S., Kettunen, H., Korichi, A., Korten, W., Le Coz, Y., Leino, M., Lopez-Martens, A., Lukyanov, S.M., Penionzhkevich, Yu.E., Pritchard, A., Rahkila, P., Rejmund, M., Saren, J., Scholey, C., Siem, S., Saint-Laurent, M.G., Simenel, C., Sobolev, Yu.G., Stodel, C., Uusitalo, J., Villari, A.C.C., Bender, M., Bonche, P., Heenen, P.-H.
Format: Artikel
Sprache:eng
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Nuclear Experiment
Physics
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Zusammenfassung:The odd-Z isotope 255Lr, its daughter 251Md and grand-daughter 247Es were studied in two experiments performed at GANIL and the University of Jyväskylä. The 255Lr nuclei were produced using the cold fusion-evaporation reaction 209Bi(48Ca, 2n)255Lr at a bombarding energy of 217MeV. The single-particle structure and decay properties were investigated using α, γ and electron spectroscopy. The ground-state spin and parity could be assigned for 255Lr (1/2-) and 251Md (7/2-). States corresponding to the 7/2+[633], 7/2-[514] and 1/2-[521] Nilsson orbitals were observed. Results are compared to experimental data obtained in neighbouring isotopes and to Hartree-Fock-Bogoliubov calculations using the Skyrme interaction SLy4 and a density-dependent pairing interaction. The position of the 1/2-[521] orbital from the spherical 2f5/2 shell is discussed.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/i2006-10134-5