Description of superdeformed bands in light<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:mi>Z</mml:mi></mml:mrow></mml:math>nuclei using the cranked Hartree-Fock-Bogoliubov method

Oi, Makito

doi:10.1103/physrevc.76.044308

Cited by 8 publications

(7 citation statements)

References 23 publications

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“…In Ref. [9], some of the present authors applied the PSM to study the SD band in the N = Z nucleus 36 Ar [7,8], and interpreted the band disturbance around I = 12 as a consequence of the simultaneous alignment of the 1f 7/2 quasi-proton and neutron pairs, which was later supported by other studies [18,19,20,21]. In the present Letter, we analyze the SD band in 40 Ar using the PSM.…”

supporting

confidence: 70%

“…Various model calculations [7,9,18,20,21,25,26] interpreted the backbending in moment of inertia for the N = Z nucleus 36 Ar as being due to a simultaneous alignment of protons and neutrons in the f 7/2 orbital. The different rotational behavior for the two isotopes was attributed to different occupation of the neutron f 7/2 orbit in Ref.…”

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confidence: 99%

“…In Ref. [20], Oi pointed out that in the CHFB calculation pairing correlations tend to suppress triaxial deformation. Without pairing, triaxial deformation would be enhanced and ultimately emerge at high spins.…”

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Superdeformed band in the N = Z + 4 nucleus 40Ar : A projected shell model analysis

et al. 2018

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It has been debated whether the experimentally-identified superdeformed rotational band in 40 Ar [E. Ideguchi, et al., Phys. Lett. B 686 (2010) 18] has an axially or triaxially deformed shape. Projected shell model calculations with angularmomentum-projection using an axially-deformed basis are performed up to high spins. Our calculated energy levels indicate a perfect collective-rotor behavior for the superdeformed yrast band. However, detailed analysis of the wave functions reveals that the high-spin structure is dominated by mixed 0-, 2-, and 4-quasiparticle configurations. The calculated electric quadrupole transition probabilities reproduce well the known experimental data and suggest a reduced, but still significant, collectivity in the high spin region. The deduced triaxial deformation parameters are small throughout the entire band, suggesting that triaxiality is not very important for this superdeformed band.

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Superdeformed band in the N = Z + 4 nucleus 40Ar : A projected shell model analysis

et al. 2018

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“…The quadrupole moment of Q 0 = 6.8 e b are chosen as the average A self-consistent Hartree-Fock-Bogoliubov cranking calculation of the type described in Ref. [19] has been performed for the K π = 3/2 − band in 187 W. The spherical Nilsson Hamiltonian was chosen for the one-body part in the cranking Hamiltonian and the P + Q.Q force for the two-body interaction. The model space consists of two-plus-two major shells both for protons (N = 4 and 5) and neutrons (N = 5 and 6).…”

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confidence: 99%

One-quasiparticle bands in neutron-richW187

et al. 2008

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Modest spin states in neutron-rich 187 W have been populated by using a 186 W( 18 O, 17 O) one-neutron transfer reaction. Negative-parity bands previously known are extended to higher spin, and two positive-parity bands are newly identified. Configurations based on ν i 13/2 orbitals are assigned to these bands from an analysis of the level energy systematics as well as the g factors derived from in-band branching ratios.

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“…In order to understand the high-spin structure in 40 Ar, cranked Hartree-FockBogoliubov (HFB) calculations with the P + QQ force 10) were performed. The model space of the full sd-fp shell with the g 9/2 was used and the evolution of the shape was treated in the self-consistent manner.…”

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confidence: 99%

Superdeformed Band in Asymmetric N $>$ Z Nucleus, $^{40}$Ar and High-Spin States in A $=$ 30 $\sim$ 40 Nuclei

Ideguchi

Ota

Morikawa

et al. 2012

Prog. Theor. Phys. Suppl.

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A rotational band with five cascade γ-ray transitions was newly found in 40 Ar. The deduced transition quadrupole moment of 1.45 +0.49 −0.31 eb has demonstrated this band as having a superdeformed shape of β 2 ∼ 0.5. The structure of the band was discussed in the framework of cranked Hartree-Fock-Bogoliubov calculations and the assignment of multiparticlemultihole configuration has been made. §1. IntroductionAfter the systematic investigation of superdeformation in various mass regions, 1) a new 'island' of superdeformed (SD) nuclei was found in the nuclear chart around A ∼ 40 (i.e., 36 Ar, 2) 40 Ca, 3) and 44 Ti 4) ). These N = Z nuclei are magic and near magic systems whose ground states have a spherical shape. In order to produce the collective degrees of freedom necessary for the formation of SD states in these nuclei, cross-shell excitations involving both the sd and pf shells are necessary. SD shell structure in this mass region plays an important role to form such large deformed structures. Woods-Saxon single-particle diagram (see Fig. 4 of Ref. 3)) shows a SD gap at β 2 ∼ 0.6 in N = Z = 20, which is associated with the SD band of 40 Ca 3) with 8 particle 8 hole (8p-8h) configuration built on the third 0 + state. Another SD gap at β 2 ∼ 0.5 at N = Z = 18 is associated with the observed SD band in 36 Ar 2) which is built on the second 0 + state with 4p-4h configuration. The existence of many deformed gaps in this region may result in the SD structures at the excited 0 + states and rotational bands built on such states are expected at high-spin levels. If such simple picture generally holds in this mass region, another SD structure in asymmetric N > Z nucleus, 40 Ar, associated with the Z = 18 and N = 22 SD shell gaps will be present.The presence of the SD band starting from the exited 0 + level is another remarkable feature in this mass region. SD bands in the other mass region were found in much higher-spin regime ( 20 ) and the observed lowest level of the band is supposed to lie ∼ 3 MeV above the yrast line. In most cases, linking transitions

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Description of superdeformed bands in lightN=Znuclei using the cranked Hartree-Fock-Bogoliubov method

Cited by 8 publications

References 23 publications

Superdeformed band in the N = Z + 4 nucleus 40Ar : A projected shell model analysis

Superdeformed band in the N = Z + 4 nucleus 40Ar : A projected shell model analysis

One-quasiparticle bands in neutron-richW187

Superdeformed Band in Asymmetric N $>$ Z Nucleus, $^{40}$Ar and High-Spin States in A $=$ 30 $\sim$ 40 Nuclei

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