High-spin structure of 155Dy

Vlastou, R.; Papadopoulos, C.; Serris, M.; Kalfas, C. A.; Fotiades, N.; Harissopulos, S.; Kossionides, S.; Sharpey‐Schafer, J. F.; Paul, E. S.; Forsyth, P.D.; Nolan, P.; Ward, N.D.; Riley, M.A.; Simpson, John; Lisle, J.C.; Walker, P. M.; Guttormsen, M.; Rekstad, J.

doi:10.1016/0375-9474(94)90819-2

Cited by 21 publications

(9 citation statements)

References 37 publications

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Gradual loss of collectivity in rotational bands in N = 89 isotones

Shayestefar¹,

Kardan²

2021

EPL

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In the present work, we investigate the general properties of low-lying experimental bands in three N = 89 isotones, 155 Dy (Z = 66), 156 Ho (Z = 67), 157 Er (Z = 68), at high spin within the cranked Nilsson-Strutinsky formalism. The excitation energies of the yrast bands have been compared with the experimental findings, and good agreements are observed. Our calculations show that with increasing total nuclear spin, the collectivity decreases gradually leading to the termination. In addition, nuclei with 10-12 particles outside the closed core terminate within configurations with no hole in the core.

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confidence: 99%

“…155 Dy: For the positive-parity band 6, which is yrast up to I ∼ 35, neither the experiments [28,29] Negative-parity bands 5 and 7 in 155 Dy experience a proton alignment at I ∼ 30, see ref. [29]. They are smoothly down-sloping based on the experimental findings as a significant reduction of the E2 strength in the highest states [28,29].…”

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Gradual loss of collectivity in rotational bands in N = 89 isotones

Shayestefar¹,

Kardan²

2021

EPL

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“…1 is the well-known high-K band from the comprehensive work of T. Brown et al, [30] and R. Vlastou et al, [31]. This structure is understood to arise from the [505]11/2neutron configuration and is interlinked by strong M1 transitions [30,31].…”

Section: Level Schemesmentioning

confidence: 99%

First candidates for γ vibrational bands built on the [505]11/2− neutron orbital in odd- A Dy isotopes

Majola¹,

Sithole²,

Mdletshe³

et al. 2020

Phys. Rev. C

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Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155 Gd(α,2n) 157 Dy and 148 Nd( 12 C, 5n) 155 Dy reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a K π = 2 + γ vibrational band, built on the [505]11/2neutron orbital, in both odd-A 155, 157 Dy isotopes. The coupling of the first excited K=0 + states or the so-called β vibrational bands at 661 and 676 keV in 154 Dy and 156 Dy to the [505]11/2orbital, to produce a K π =11/2band, was not observed in both 155 Dy and 157 Dy, respectively. The implication of these findings on the interpretation of the first excited 0 + states in the core nuclei 154 Dy and 156 Dy are also discussed.

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“…An example of lifetime analysis in Band 4 is shown in Fig.1. From the DSAM data, 10 lifetimes have been determined in Band 6 and Band 7 (see band nomenclature in [10]). The PTRM calculations have been performed within the approach and with the codes described in [11,12].…”

Section: -P2 3 Analysis Of the Datamentioning

confidence: 99%

“…In particular, this procedure allows for an investigation of the unknown feeding of the level of interest in cases where the line shapes of the depopulating transitions are obtained with gates from below. The Monte-Carlo simulation of the slowing-down process was made by using a modified version of the Winter's code DESASTOP [8][9][10]. This version follows in three dimensions the evolution of the velocity of the recoils in the stopping media and can use numerical stopping powers.…”

Section: -P2 3 Analysis Of the Datamentioning

confidence: 99%

Low-lying bands with different quadrupole deformation in¹⁵⁵Dy

Petkov

Yavahchova

Möller

et al. 2014

EPJ Web of Conferences

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Abstract.To investigate the interplay between collective and single particle degrees of freedom in odd nuclei, Recoil distance Doppler-shift and Doppler-shift attenuation lifetime measurements were carried out for levels in 155 Dy in coincidence detection of gamma-rays. 26 lifetimes were determined using the Differential decay curve method. Particle plus triaxial rotor model (PTRM) calculations were performed to compare the experimental level scheme and transition strengths with theoretical ones in order to get information on the quadrupole deformation (ǫ,γ) of the bands. As a result, different quadrupole deformations for the one-quasineutron bands at low and medium spins are deduced.

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High-spin structure of 155Dy

Cited by 21 publications

References 37 publications

Gradual loss of collectivity in rotational bands in N = 89 isotones

Gradual loss of collectivity in rotational bands in N = 89 isotones

First candidates for γ vibrational bands built on the [505]11/2− neutron orbital in odd- A Dy isotopes

Low-lying bands with different quadrupole deformation in¹⁵⁵Dy

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High-spin structure of 155Dy

Cited by 21 publications

References 37 publications

Gradual loss of collectivity in rotational bands in N = 89 isotones

Gradual loss of collectivity in rotational bands in N = 89 isotones

First candidates for γ vibrational bands built on the [505]11/2− neutron orbital in odd- A Dy isotopes

Low-lying bands with different quadrupole deformation in155Dy

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Low-lying bands with different quadrupole deformation in¹⁵⁵Dy