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Gd, Dracoulis; Fabricius, B.; Stuchbery, A.E.; Macchiavelli, A. O.; Körten, W.; Azaiez, F.; Rubel, E.; Deleplanque, M. A.; Rm, Diamond; Stephens, F. S.

doi:10.1103/physrevc.44.r1246

Cited by 48 publications

(37 citation statements)

References 7 publications

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“…The N ∼ 98 platinum isotopes (and their osmium isotones to a lesser extent) show a marked deviation from the gradual increase in E(4 + )/E(2 + ) ratio with increasing neutron number. This arises from perturbations to the yrast sequences arising from mixing between coexisting bands [17][18][19].…”

Section: Low-lying Excited Statesmentioning

confidence: 99%

Evolution of collective structures in the heavy transitional nuclei above the N = 82 closed shell

Joss

2016

EPJ Web Conf.

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Abstract. The emergence of collectivity in atomic nuclei is a fundamental paradigm in nuclear structure physics. Considerable progress has been made towards the identification of excited states in heavy neutrondeficient nuclei above the N = 82 closed shell. This paper summarises recent progress in the spectroscopic study of the Ta, W and Re nuclides with N ∼ 90 obtained from recoil and recoil-decay tagging experiments. The nuclei near N = 90 occupy a γ-soft transitional region where the nuclear shape is particularly sensitive to the interplay between collective excitations and the underlying single-particle structure. The consequences of these interactions for low and high-spin states are discussed.

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Section: Low-lying Excited Statesmentioning

confidence: 99%

Evolution of collective structures in the heavy transitional nuclei above the N = 82 closed shell

Joss

2016

EPJ Web Conf.

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“…The ground states of Hg isotopes in the mass range A = 182 − 188 are found to be weakly deformed and of predominantly oblate nature, while the excited 0 + 2 states in 182,184 Hg exhibit a larger deformation. Similarly, low-lying states in light Pt isotopes have been studied experimentally with γ-ray spectroscopy [13][14][15], showing that shape coexistence of states with different deformation is still present in neutron-deficient Pt isotopes with Z = 78. Moderate odd-even staggering was also found in very light Pt isotopes from laser spectroscopy [16].…”

Section: Introductionmentioning

confidence: 99%

Effects of deformation on theβ-decay patterns of light even-even and odd-mass Hg and Pt isotopes

Boillos

Sarriguren

2015

Phys. Rev. C

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Bulk and decay properties, including deformation energy curves, charge mean square radii, Gamow-Teller (GT) strength distributions, and β-decay half-lives, are studied in neutron-deficient even-even and odd-A Hg and Pt isotopes. The nuclear structure is described microscopically from deformed quasiparticle random-phase approximation calculations with residual interactions in both particle-hole and particle-particle channels, performed on top of a self-consistent deformed quasiparticle Skyrme Hartree-Fock basis. The observed sensitivity of the, not yet measured, GT strength distributions to deformation is proposed as an additional complementary signature of the nuclear shape. The β-decay half-lives resulting from these distributions are compared to experiment to demonstrate the ability of the method.

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“…The rst excited 3 state is only known in 210 Po; for the other Po isotopes, the polarization e ect on the energy of the octupole phonon state due to the two extra protons was estimated from the value found in 210 Po. For the coupling strength 3 , the relation h! 3 3 constant was used.…”

Section: Resultsmentioning

confidence: 99%

“…11 and 12, combined with the existing information on shape coexistence in the Pb region [1,3,4,5,6,7,8,9,10,11,12,13,14], stresses the conclusion that secondary minima in the PES (shape coexistence) are related to the distinct balance of prolate and oblate energy di erence of both protons and neutrons for a given con guration. Based on this observation, it is interesting to note that the Rn isotopes should beexpected to exhibit the same variety of coexisting shapes as the Po and Pb isotopes (close to spherical, oblate and prolate).…”

Section: Potential Energy Surface Calculationsmentioning

confidence: 99%

“…While the even-even neutron de cient Pt isotopes have been studied down to neutron numberN=90 [3,4] and the Hg isotopes down to N=96 [5,6], spectroscopy experiments become increasingly di cult to perform on nuclei with larger proton number in the same neutron number range. The Pb nuclei have been studied in-beam down to N=102 [7,8,9,10], the Po nuclei down to N=108 [11,12] and the Rn nuclei down to N=112 [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Shape coexistence in the light Po isotopes

Oros¹,

Heyde²,

Coster³

et al. 1998

Exotic Nuclei and Atomic Masses (ENAM 98)

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The systematics of the even light P o isotopes (N 126) are studied in the framework of the Particle-Core Model. The strong perturbation of the systematics in the very light isotopes is interpreted as arising from the interaction between regular and intruder structures. Results of Potential Energy Surface (PES) calculations and predictions of the Pairing Vibration Model support this interpretation. The mixing between the regular and intruder structures is studied within the IBM-2 and in a simple two-state mixing picture. Matrix elements of the interaction and their spin-dependence are extracted. The 'reconstructed systematics' show the coexistence of a spherical structure, which v aries little with the neutron number, with an intruder band, strongly lowered in energy as the neutron numberapproaches midshell. The crossing of the two con gurations takes place over a few isotopes; the intruder band becomes the ground-state con guration in 192 Po.

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Shape coexistence from the structure of the yrast band inPt174

Cited by 48 publications

References 7 publications

Evolution of collective structures in the heavy transitional nuclei above the N = 82 closed shell

Evolution of collective structures in the heavy transitional nuclei above the N = 82 closed shell

Effects of deformation on theβ-decay patterns of light even-even and odd-mass Hg and Pt isotopes

Shape coexistence in the light Po isotopes

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