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Illana, A.*; Perea, A.*; Ncher, E.*; Orlandi, R.; Jungclaus, A.*
Nuclear Instruments and Methods in Physics Research A, 785, p.47 - 54, 2015/06
被引用回数:1 パーセンタイル:8.92(Instruments & Instrumentation)This article describes the development of a chamber to measure the magnetic moments of excited states of fast radioactive ions. The measurement consists of an integrated perturbed angular correlation. The radioactive ions experience a strong transient field when crossing a gadolinium backing magnetized by an external magnetic field, and cooled via thermal contact with a liquid nitrogen circuit. The chamber was already employed successfully at REX-ISOLDE, CERN, to measure the g-factor of the 2 state in
Zn.
Orlandi, R.; Mcher, D.*; Raabe, R.*; Jungclaus, A.*; Pain, S. D.*; Bildstein, V.*; Chapman, R.*; De Angelis, G.*; Johansen, J. G.*; Van Duppen, P.*; et al.
Physics Letters B, 740, p.298 - 302, 2015/01
被引用回数:29 パーセンタイル:84.43(Astronomy & Astrophysics)Single-neutron states in Zn have been populated using the reaction
Zn(d,p) at REX-Isolde, CERN. The analysis reveals that the lowest excited states in
Zn lie at approximately 1 MeV, and involve neutron orbits above the N=50 shell gap. A 5/2
configuration was assigned to the 983-keV state. Comparison with large-scale shell model calculations supports a robust neutron N=50 shell closure for
Ni. These data constitute an important step towards the understanding the magicity of
Ni and the structure of nuclei in the region.
Illana, A.*; Jungclaus, A.*; Orlandi, R.; Perea, A.*; Bauer, C.*; Briz, J. A.*; Egido, J. L.*; Gernhuser, R.*; Leske, J.*; M
cher, D.*; et al.
Physical Review C, 89(5), p.054316_1 - 054316_11, 2014/05
被引用回数:11 パーセンタイル:58.04(Physics, Nuclear)The factor of the first excited state in
Zn was measured using the transient-field technique in combination with Coulomb excitation. The experiment was ran at REX-ISOLDE, CERN, and the
-ray perturbed angular correlations were measured using 4 triple Germanium clusters of the Miniball array. The experimental result
(2
) = +0.47(14) is significant to establish the structure of the Zn isotopes near N=40. Comparison with shell-model calculations reveal that to reproduce the measured energies and B(E2) of the Zn isotopes around N=40, both the proton excitations from the
orbit and neutron excitations into the
and
orbits are essential. Furthermore, beyond-mean-field calculations reveal the need to include the triaxial degree of freedom.
Orlandi, R.; Mcher, D.*; Raabe, R.*; Jungclaus, A.*; Pain, S. D.*; Bildstein, V.*; Chapman, R.*; De Angelis, G.*; Johansen, J. G.*; Van Duppen, P.*; et al.
no journal, ,
Single-neutron states in the = 49 isotope
Zn were populated in the
Zn(d,p)
Zn transfer reaction at REX-ISOLDE, CERN. The combined detection of protons ejected in the reaction and of
rays emitted by
Zn permitted the identification of the lowest-lying 5/2
and 1/2
excited states. The analysis of proton angular distributions links these states to a significant amount of single-particle strength around 1 MeV, and specifically to the
d
and
s
neutron orbits, which lie above the
= 50 neutron shell gap. Comparison with large-scale-shell-model calculations supports a robust
= 50 shell-closure for
Ni. These data constitute a considerable step towards the understanding of the magicity of
Ni and of the structure of isotopes in the region.