Shell-structure and pairing interaction in superheavy nuclei: rotational properties of the z=104 nucleus (256)rf.
Phys Rev Lett
; 109(1): 012501, 2012 Jul 06.
Article
em En
| MEDLINE
| ID: mdl-23031099
ABSTRACT
The rotational band structure of the Z=104 nucleus (256)Rf has been observed up to a tentative spin of 20â using state-of-the-art γ-ray spectroscopic techniques. This represents the first such measurement in a superheavy nucleus whose stability is entirely derived from the shell-correction energy. The observed rotational properties are compared to those of neighboring nuclei and it is shown that the kinematic and dynamic moments of inertia are sensitive to the underlying single-particle shell structure and the specific location of high-j orbitals. The moments of inertia therefore provide a sensitive test of shell structure and pairing in superheavy nuclei which is essential to ensure the validity of contemporary nuclear models in this mass region. The data obtained show that there is no deformed shell gap at Z=104, which is predicted in a number of current self-consistent mean-field models.
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01-internacional
Base de dados:
MEDLINE
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Phys Rev Lett
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Finlândia