β-decay properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Ni</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>72</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Cu</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>72</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Thomas, J. C.; Witte, H. De; Górska, M.; Huyse, M.; Kruglov, K.; Kudryavtsev, Yuri; Pauwels, D.; Prasad, N. V. S. V.; Vel, K. Van de; Duppen, Piet Van; Roosbroeck, J. Van; Franchoo, S.; Cederkäll, J.; Fynbo, H. O. U.; Georg, U.; Jönsson, O.; Köster, U.; Weissman, L.; Mueller, W. F.; Fedosseev, Valentin; Mishin, V. I.; Fedorov, D. V.; Maesschalck, A. De; Smirnova, N. A.

doi:10.1103/physrevc.74.054309

Cited by 18 publications

(4 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…− multiplet, where the 6 − state forms theFIG. 14: (color online) Experimental and calculated lowest levels in the odd-odd Cu isotopes[24,25,30,45]. Levels in bold have calculated moments in agreement with the experimentally measured magnetic and quadrupole moments of the ground state.…”

mentioning

confidence: 53%

Nuclear spins, magnetic moments, and quadrupole moments of Cu isotopes fromN=28toN=46: Probes for core polarization effects

et al. 2010

View full text Add to dashboard Cite

Measurements of the ground-state nuclear spins and magnetic and quadrupole moments of the copper isotopes from 61 Cu up to 75 Cu are reported. The experiments were performed at the CERN online isotope mass separator (ISOLDE) facility, using the technique of collinear laser spectroscopy. The trend in the magnetic moments between the N = 28 and N = 50 shell closures is reasonably reproduced by large-scale shell-model calculations starting from a 56 Ni core. The quadrupole moments reveal a strong polarization of the underlying Ni core when the neutron shell is opened, which is, however, strongly reduced at N = 40 due to the parity change between the pf and g orbits. No enhanced core polarization is seen beyond N = 40. Deviations between measured and calculated moments are attributed to the softness of the 56 Ni core and weakening of the Z = 28 and N = 28 shell gaps.

show abstract

mentioning

confidence: 53%

Nuclear spins, magnetic moments, and quadrupole moments of Cu isotopes fromN=28toN=46: Probes for core polarization effects

et al. 2010

View full text Add to dashboard Cite

show abstract

“…In the case of 72 Zn Wilson et al observed the yrast cascade up to spin 10 + and reported two transitions with energies of 1424.1 and 1526.7 keV, respectively, feeding the 4 + 1 state from non-yrast states [38]. These transitions do not correspond to any of the transitions that were observed to feed the 4 + 1 state after β decay of 72 Cu [40]. The spectra taken in the present experiment show some indication for a transition at 1527 keV, decomposed into a fast and slow component.…”

Section: Discussionmentioning

confidence: 99%

Collective nature of low-lying excitations in70,72,74Zn from lifetime measurements using the AGATA spectrometer demonstrator

Louchart¹,

Obertelli²,

Görgen³

et al. 2013

Phys. Rev. C

View full text Add to dashboard Cite

Background: Neutron-rich nuclei with protons in the fp shell show an onset of collectivity around N = 40. Spectroscopic information is required to understand the underlying mechanism and to determine the relevant terms of the nucleon-nucleon interaction that are responsible for the evolution of the shell structure in this mass region. Methods: We report on the lifetime measurement of the first 2 + and 4 + states in 70,72,74 Zn and the first 6 + state in 72 Zn using the recoil distance Doppler shift method. The experiment was carried out at the INFN Laboratory of Legnaro with the AGATA demonstrator, first phase of the Advanced Gamma Tracking Array of highly segmented, high-purity germanium detectors coupled to the PRISMA magnetic spectrometer. The excited states of the nuclei of interest were populated in the deep inelastic scattering of a 76 Ge beam impinging on a 238 U target. Results: The maximum of collectivity along the chain of Zn isotopes is observed for 72 Zn at N = 42. An unexpectedly long lifetime of 20 +1.8 −5.2 ps was measured for the 4 + state in 74 Zn. Conclusions: Our results lead to small values of the B(E2; 4 + 1 → 2 + 1 )/B(E2; 2 + 1 → 0 + 1 ) ratio for 72,74 Zn, suggesting a significant noncollective contribution to these excitations. These experimental results are not reproduced by state-of-the-art microscopic models and call for lifetime measurements beyond the first 2 + state in heavy zinc and nickel isotopes.

show abstract

“…The B(E2; 6 − → 4 − ) values for 68 Cu and 70 Cu were extracted by normalizing the observed yields for projectile and target excitation and taking into account the isomeric ratios. In 72 Cu the 6 − state is located above the 4 − state, and the B(E2) value is known from lifetime measurements [138]. Comparing the results for 70 Cu with shell model calculations, it was concluded that a single proton and neutron outside the Z = 28 and N = 40 (sub-)shell closures are not sufficient to polarize the 68 Ni core.…”

Section: The Ni Region From N = 40 To N = 50mentioning

confidence: 99%

Shapes and collectivity of exotic nuclei via low-energy Coulomb excitation

Görgen

2010

J. Phys. G: Nucl. Part. Phys.

View full text Add to dashboard Cite

The way in which an atomic nucleus responds to excitations, whether by promoting individual nucleons into higher shells or by collective rotation or vibration, reveals many details of the underlying nuclear structure. The response of the nucleus is closely related to its macroscopic shape. Low-energy Coulomb excitation provides a well-understood means of exciting atomic nuclei, allowing the measurement of static and dynamic electromagnetic moments as a probe of the nuclear wavefunctions. Owing to the availability of radioactive heavy-ion beams with energies near the Coulomb barrier, it is now possible to study the shape and collectivity of short-lived nuclei far from β stability (the so-called exotic nuclei), providing a particularly stringent test of modern theoretical nuclear structure models. This review gives an introduction to the experimental techniques related to low-energy Coulomb excitation with radioactive ion beams and summarizes the results that were obtained over the last 10 years for a wide variety of exotic nuclei at various laboratories employing the isotope separation on-line technique.

show abstract

β-decay properties ofNi72andCu72

Cited by 18 publications

References 21 publications

Nuclear spins, magnetic moments, and quadrupole moments of Cu isotopes fromN=28toN=46: Probes for core polarization effects

Nuclear spins, magnetic moments, and quadrupole moments of Cu isotopes fromN=28toN=46: Probes for core polarization effects

Collective nature of low-lying excitations in70,72,74Zn from lifetime measurements using the AGATA spectrometer demonstrator

Shapes and collectivity of exotic nuclei via low-energy Coulomb excitation

Contact Info

Product

Resources

About