Different structure collective bands in the N = 87 nuclei 149Sm, 151Gd and 153Dy

Kleinheinz, P.; Stefanini, A. M.; Maier, M.R.; Sheline, R.K.; Diamond, R. M.; Stephens, F. S.

doi:10.1016/0375-9474(77)90428-6

Cited by 59 publications

(14 citation statements)

References 16 publications

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“…d Doublet figuration in the odd neutron N=87 iotones: 852keV in lSlGd and 712keV in 153Dy [16]. This configuration assignment is also in agreement with the strong E1 and small M2 hindrance factor found for the 431.7keV line which corresponds, to the transition:…”

Section: Band Structure In 15ztbsupporting

confidence: 81%

“…The 7-state of seniority v= 1 is generally very close to the -~-level and can be identified with the 9 + state has been identified in ~S2Tb at the excitation energy 806.1 keV. This assumption is in agreement with the fact that the energy difference (206 keV) between the 10 § and 9 + states in 152Tb is close to the energy difference between the ground state of the h 9 and f7 configuration in the odd neutron N=87 isotones: 379keV in ~51Gd and 296keV in 153Dy [16].…”

Section: Band Structure In 15ztbsupporting

confidence: 72%

“…This assignment is certainly not correct if we take into account the moderately rotational character of the collective structures observed above the isomeric state. In fact the situation of the 152Tb nucleus looks very much like those of the odd neutron N=87 isotones: ~49Sm, tSIGd and 153Dy [16] where the collective states built on the neutron configurations f~, h-~ and i~ ~-have been observed. Then the three collective systems fed in ~52Tb correspond very likely to the same neutron orbitals coupled to the h ~ proton shell (Fig.…”

Section: Band Structure In 15ztbmentioning

confidence: 94%

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High spin states in the transitional odd-odd nuclei150Eu and152Tb

et al. 1983

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The (YLi, 5 n) and (11B, 5 n) reactions have been used to study the high-spin states in the two odd-odd nuclei 15~ and 152Tb. The latter one is well developped and improves our knowledge of this system between the spherical and deformed region. The analysis of the collective moment of inertia and transition ratios strongly suggests an increase of the deformation when the rotational frequency increases in these two transitional nuclei lS~ and aSZTb"

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Section: Band Structure In 15ztbsupporting

confidence: 81%

Section: Band Structure In 15ztbsupporting

confidence: 72%

Section: Band Structure In 15ztbmentioning

confidence: 94%

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High spin states in the transitional odd-odd nuclei150Eu and152Tb

et al. 1983

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“…h 2 --(Hqp _~_~(~__j)2~ =~_<Vcore>is+2__<Vcore>ls (10) where the value of the last quantity becomes (Veore)Is+2-(Vcore>I.…”

Section: E(l=is+2)=e(i=is)+ Hq'p'+2j~o~(i-j)2 8+2mentioning

confidence: 99%

Properties of rotational excitations in odd mass Dy isotopes

Hjorth¹,

Klamra²

1977

Z Physik A

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The data on high-spin rotational states in ~55Dy, ~57Dy, 159Dy and 161Dy are discussed within a model where a particle is coupled to a rotor with a variable moment of inertia. In this model there is often a definite improvement in the quality and stability of the fits to levels in the positive-parity band below spin 25/2 when the moment of inertia of the core exhibits a linear dependence on the square of the rotational angular velocity as compared to the situation where a linear dependence on I(I + 1) is assumed. In the improved fits the empirical matrix elements of the Coriolis force exhibit a smooth and significant increase with decreasing moment of inertia. The rotational energies above spin 25/2 in the positive-parity band and above 19/2 in the 11/2-[-505] band are understood within the present theoretical model if the moment of inertia increases more rapidly than the linear trend established at lower spin. In the 11/2-[505] band this increase follows rather closely the behaviour in the even nuclei whereas in the positive-parity band the curves are quite flat even beyond the point where the moment of inertia in the even nuclei exhibits a discontinuous or back-bending behaviour. The significance of this observation is discussed in the light of existing theories on nuclear moments of inertia.

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“…About a year ago, the idea of nuclear shape coexistence in 151Eu has been independently proposed from the work with the reactions (d,t) [12], (p,p') [13]. Similar structures are discussed [14,15] for the odd nuclei with N=87 and N=89. It should be noted that several states lower than 415keV are known from the decay of 151Gd [16][17][18].…”

Section: Introductionmentioning

confidence: 91%