Direct experimental evidence for a multiparticle-hole ground state configuration of deformed Mg-33
Data(s) |
06/09/2016
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Resumo |
The first direct experimental evidence of a multiparticle-hole ground state configuration of the neutron-rich Mg-33 isotope has been obtained via intermediate energy (400 A MeV) Coulomb dissociation measurement. The major part similar to(70 +/- 13)% of the cross section is observed to populate the excited states of Mg-32 after the Coulomb breakup of Mg-33. The shapes of the differential Coulomb dissociation cross sections in coincidence with different core excited states favor that the valence neutron occupies both the s(1/2) and p(3/2) orbitals. These experimental findings suggest a significant reduction and merging of sd-pf shell gaps at N similar to 20 and 28. The ground state configuration of Mg-33 is predominantly a combination of Mg-32(3.0,3.5MeV; 2(-), 1(-)) circle times nu(s1/2), Mg-32(2.5MeV; 2(+)) circle times nu(p3/2), and Mg-32(0; 0(+)) circle times nu(p3/2). The experimentally obtained quantitative spectroscopic information for the valence neutron occupation of the s and p orbitals, coupled with different core states, is in agreement with Monte Carlo shell model (MCSM) calculation using 3 MeV as the shell gap at N = 20. |
Formato |
application/pdf |
Identificador |
http://eprints.ucm.es/39816/1/Fraile%20Prieto%2014%20libre.pdf |
Idioma(s) |
en |
Publicador |
American Physical Society |
Relação |
http://eprints.ucm.es/39816/ http://dx.doi.org/10.1103/PhysRevC.94.034304 10.1103/PhysRevC.94.034304 PIN: 11-RD-SIN-5.11-0400 |
Direitos |
info:eu-repo/semantics/openAccess |
Palavras-Chave | #Física nuclear |
Tipo |
info:eu-repo/semantics/article PeerReviewed |