Structure of the Sr-Zr isotopes near and at the magic<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>50</mml:mn></mml:mrow></mml:math>shell from<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>g</mml:mi></mml:math>-factor and lifetime measurements in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msubsup><mml:mrow /><mml:mn>40</mml:mn><mml:mn>88</mml:mn></mml:msubs

Kumbartzki, G.; Speidel, K.‐H.; Benczer‐Koller, N.; Torres, D. A.; Sharon, Y. Y.; Zamick, Larry; Robinson, S. J. Q.; Maier-Komor, P.; Ahn, T.; Anagnostatou, V.; Bernards, C.; Elvers, M.; Goddard, P.; Heinz, A.; Ilie, G.; Radeck, D.; Savran, D.; Werner, V.; Williams, E.

doi:10.1103/physrevc.85.044322

Cited by 32 publications

(10 citation statements)

References 20 publications

(22 reference statements)

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“…In fact, the nuclear potential with the above set of parameters is found to approximately reproduce the position of the neutron drip line, which is expected from presently available experimental data. In the discussion of the possible deformation of given nuclei examining the Nilsson diagram, we use the following empirical facts: (a) if pair correlation plays a minor role, the presence of neutrons in almost-degenerate j shells around the Fermi level may make the system deformed, as those neutrons have the possibility of gaining energy by breaking spherical symmetry (Jahn-Teller effect); (b) in order to obtain a deviation from a spherical shape, the energies of one-particle levels just below and on the Fermi level in the Nilsson diagram need to be mostly decreasing (downward-going) for β = 0 → β = 0 so that the system gains the energy by deformation [9]; (c) the presence of only like nucleons in a large single j shell may not be sufficient to deform the system, although the presence of both neutrons and protons in a given single j shell may induce some quadrupole deformation (examples are the absence of observed deformed nuclei in both the 38 Sr and the 40 Zr isotopes, owing to the occupation of the 1g 9/2 shell by neutrons [12], and in the 18 Ar and 20 Ca isotopes, owing to the occupation of the 1f 7/2 shell by neutrons); and (d) only prolate deformation is discussed, as it is empirically known that prolate deformation is overwhelmingly dominant among deformed nuclei, although the absolute dominance is not yet fully understood [13].…”

Section: -2mentioning

confidence: 99%

Neutron shell structure and deformation in neutron-drip-line nuclei

Hamamoto

2012

Phys. Rev. C

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Neutron shell-structure and the resulting possible deformation in the neighborhood of neutrondrip-line nuclei are systematically discussed, based on both bound and resonant neutron oneparticle energies obtained from spherical and deformed Woods-Saxon potentials. Due to the unique behavior of weakly-bound and resonant neutron one-particle levels with smaller orbital angularmomenta ℓ, a systematic change of the shell structure and thereby the change of neutron magicnumbers are pointed out, compared with those of stable nuclei expected from the conventional j-j shell-model. For spherical shape with the operator of the spin-orbit potential conventionally used, the ℓ j levels belonging to a given oscillator major shell with parallel spin-and orbital-angularmomenta tend to gather together in the energetically lower half of the major shell, while those levels with anti-parallel spin-and orbital-angular-momenta gather in the upper half. The tendency leads to a unique shell structure and possible deformation when neutrons start to occupy the orbits in the lower half of the major shell. Among others, the neutron magic-number N=28 disappears and N=50 may disappear, while the magic number N=82 may presumably survive due to the large ℓ = 5 spin-orbit splitting for the 1h 11/2 orbit. On the other hand, an appreciable amount of energy gap may appear at N=16 and 40 for spherical shape, while neutron-drip-line nuclei in the region of neutron number above N=20, 40 and 82, namely N ≈ 21-28, N ≈ 41-54, and N ≈ 83-90, may be quadrupole-deformed though the possible deformation depends also on the proton number of respective nuclei.

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Section: -2mentioning

confidence: 99%

Neutron shell structure and deformation in neutron-drip-line nuclei

Hamamoto

2012

Phys. Rev. C

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“…In Ref. [3] the experimental study of the g factors for excited states, including 4 + 1 , 2 + 1 , and 3 + 1 , were reported for the ¿rst time in 88 Zr and 84,86,88 Sr. Excited states in 88 Zr were populated using an α transfer to ion beams nuclei of 84 Zr.…”

Section: Some Results For the A ∼ 100 Regionmentioning

confidence: 98%

“…The nuclei are excited into higher energy levels and decay to the lower states while traversing the Gd layer. A feeding correction must be applied [1,15,16,17,18,3].…”

Section: The Transient Field B T Fmentioning

confidence: 99%

“…The so-called Transient Field technique (TF), in inverse kinematic, has been successfully used for measuring μ(I) mostly in I = 2 states. In recent years, measurements on states with spins I > 2 have presented the opportunity to contrast some nuclear structure models in the A ∼ 100 region [1,2,3]. A systematic study of such excited states will improve the quality of those models, such study should focus on the lack of information on μ(I) values for I > 2, as can be seen in Fig.…”

Section: Introductionmentioning

confidence: 98%

“…Values presented inFig. 1were mostly obtained from reference[4], with the exception of recent results for 100 Pd[1], 96 Ru[2],88 Zr and 86 Sr[3].…”

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confidence: 99%

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Using magnetic moments to study the nuclear structure of I ≥ 2 states

Torres¹

2013

AIP Conference Proceedings

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The experimental study of magnetic moments for nuclear states near the ground state, I ≥ 2, provides a powerful tool to test nuclear structure models. Traditionally, the use of Coulomb excitation reactions have been utilized to study low spin states, mostly I = 2. The use of alternative reaction channels, such as α transfer, for the production of radioactive species that, otherwise, will be only produced in future radioactive beam facilities has proved to be an alternative to measure not only excited states with I > 2, but to populate and study long-live radioactive nuclei. This contribution will present the experimental tools and challenges for the use of the transient ¿eld technique for the measurement of g factors in nuclear states with I ≥ 2, using Coulomb excitation and α-transfer reactions. Recent examples of experimental results near the N = 50 shell closure, and the experimental challenges for future implementations with radioactive beams, will be discussed.

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Excited Nuclear States for Sr-84 (Strontium)

Sukhoruchkin¹,

Soroko²

2015

Supplement to I/25 a-E

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Structure of the Sr-Zr isotopes near and at the magicN=50shell fromg-factor and lifetime measurements in4088

Cited by 32 publications

References 20 publications

Neutron shell structure and deformation in neutron-drip-line nuclei

Neutron shell structure and deformation in neutron-drip-line nuclei

Using magnetic moments to study the nuclear structure of I ≥ 2 states

Excited Nuclear States for Sr-84 (Strontium)

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