Energy levels of 162Er through the 165Ho(p, 4nγ)162Er reaction

Janssens, R. V. F.; Masri, Y. El; Ferte, J.M.; Michel, C.; Steyaert, J.; Vervier, J.

doi:10.1016/0375-9474(77)90554-1

Cited by 33 publications

(4 citation statements)

References 36 publications

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“…III C, the spin 7 assignment for this level, reported by De Boer et al [23] and Janssens et al [22] on the basis of angular distributions, was supported by the similarity of the isomer's decay with that of a 7 − isomer in 164 Er. BCS calculations support this assignment further, predicting the 7 − (π 7/2 − [523]π 7/2 + [404]) only 4 keV from the experimental energy of the isomer (see Table VI).…”

Section: B 162 Ersupporting

confidence: 56%

“…11. The two branches from the isomer have been previously reported by De Boer et al [23] and Janssens et al [22] with both works assigning a spin of 7 to the parent level on the basis of angular distributions. Neither work reported the level as an isomer.…”

Section: Isomer In 162 Ersupporting

confidence: 55%

“…The γ -ray energies of these branches place the isomeric state at 2026.6(6) keV, in slight disagreement with a previous measurement of 2025.57(13) keV [22]. A partial level scheme is shown in Fig.…”

Section: Isomer In 162 Ercontrasting

confidence: 49%

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Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

et al. 2012

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High-spin states in the 164 68 Er 96 region were studied using 9 Be + 160 Gd reactions. Pulsed beam conditions were exploited for enhanced sensitivity to delayed γ -ray transitions. New isomers were identified in 161 Dy, 163 Ho, 162 Er, and 165 Er. The 162 Er isomer is interpreted to decay by E1 transitions to the ground-state band with a reduced hindrance of f ν = 33. A plot of f ν values for all K = 7, E1 transitions from two-quasiparticle isomers to the ground-state bands of even-even nuclei reveals only a small influence from the dynamic to kinematic moment-of-inertia ratio, which provides a measure of Coriolis K mixing within the ground-state band. This is interpreted to imply that the relatively low hindrances are due to K mixing in the isomer, caused by a combination of Coriolis and octupole band mixing.

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Section: B 162 Ersupporting

confidence: 56%

Section: Isomer In 162 Ersupporting

confidence: 55%

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Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

et al. 2012

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“…Excited states in 159 Er were populated using a 215 MeV beam of 48 Ca, incident upon enriched (98.7%) targets of 116 Cd, inducing fusion-evaporation reactions. The target comprised of two self-supporting 116 Cd foils with a total thickness of 1.3 mg/cm 2 .…”

Section: Methodsmentioning

confidence: 99%

Diverse collective excitations in159Erup to high spin

Mustafa¹,

Ollier²,

Simpson³

et al. 2011

Phys. Rev. C

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A spectroscopic investigation of the γ decays from excited states in 159 Er has been performed in order to study the changing structural properties exhibited as ultrahigh spins (I > 60h) are approached. The nucleus 159 Er was populated by the reaction 116 Cd( 48 Ca,5nγ) at a beam energy of 215 MeV and the resulting γ decays were studied using the Gammasphere spectrometer. New rotational bands and extensions to existing sequences were observed, which are discussed in terms of the cranked shell model, revealing a diverse range of quasiparticle configurations. At spins around 50h there is evidence for a change from dominant prolate collective motion at the yrast line to oblate non-collective structures via the mechanism of band termination. A possible strongly deformed triaxial band occurs at these high spins, which indicates collectivity beyond 50h. The high spin data are interpreted within the framework of cranked Nilsson-Strutinsky calculations.

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Bibliography

Jaklovsky¹

1981

Preparation of Nuclear Targets

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Energy levels of 162Er through the 165Ho(p, 4nγ)162Er reaction

Cited by 33 publications

References 36 publications

Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

Discovery of isomers in dysprosium, holmium, and erbium isotopes withN=94to 97

Diverse collective excitations in159Erup to high spin

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