Second Discontinuity in the Yrast Levels of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Er</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>158</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Lee, I. Y.; Aléonard, M. M.; Deleplanque, M. A.; El-Masri, Y.; Newton, J.O.; Simon, R. S.; Diamond, R. M.; Stephens, F. S.

doi:10.1103/physrevlett.38.1454

Cited by 132 publications

(30 citation statements)

References 19 publications

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“…Yrast energy, corrected for ground state shell effects, versus l(l + 1). The spin and energies of the yrast states are taken from 146Gd [8], 152Dy [14], 154Er [18], and ~58Er [28]. In the case of t46Gd the highest point is quoted [8] to have l<20h.…”

Section: I(i+l) a -5/3mentioning

confidence: 99%

Gamma-spectroscopy within the island of high-spin isomers nearN=82

Borggreen¹,

Bjørnholm²,

Christensen³

et al. 1980

Z Physik A

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ANaI sum-spectrometer combined with Ge-counters has been used to characterize the members of the island of high spin isomers near N = 82. On the basis of half lives, total ),-decay energies and discrete ),-lines, assignments of 22 isomers are given or confirmed. The isomers are localized to the region 82_< N_< 86 and Z <68, and the excitation energies vary from 3 MeV to 12.2 MeV. An empirical relation between spin and excitation energy is presented and on this basis isomeric spin values up to (33_+2)h are deduced. The isomers are thought to be due to strong alignment of 2 to 8 shell-model particles in a spherical or possibly weakly oblate potential.

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Section: I(i+l) a -5/3mentioning

confidence: 99%

Gamma-spectroscopy within the island of high-spin isomers nearN=82

Borggreen¹,

Bjørnholm²,

Christensen³

et al. 1980

Z Physik A

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“…The explanation usually given for this discontinuity in the yrast levels is the alignment of the angular momentum of two high-7 nucleons with the rotational angular momentum. 5 In 158 Er the backbend at 7= 14 has been attributed to the alignment of a pair of i l3/2 neutrons, 6,7 and the upbend at I = 28 has been considered as due most probably to alignment of a pair of h ll/2 protons. 8 The aim of the present investigation was to study still higher members of the yrast sequence.…”

mentioning

confidence: 99%

Third Discontinuity in the Yrast Levels ofEr158

et al. 1982

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“…1 ) and 135 MeV" 1 in 158 Er (Lee et al , 8 )]. As noted above, the effective moment of inertia associated with aligned configurations should be that of a rigid body with the same density distribution as the nucleus.…”

mentioning

confidence: 94%

Yrast Traps and Very High-Spin Yrast States inDy152

et al. 1978

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We have identified yrast states of 152 Dy to spin ~37, with unusually strong population of high-spin states in the ( 32 S,4wy) reaction. Yrast isomers with spins ~17, 21, 27, and 31 were detected. For J ^ 14 the yrast states scatter about a straight line on an E vs IQ +1) plot, consistent with predictions for aligned-p article configurations. The slope of the line yields an effective moment of inertia 18% larger than the rigid-sphere value. This and other arguments suggest possible oblate deformation at high spin.Investigations of high-spin nuclear states, / > 3Qfr, have so far been limited to studies of continuum y radiation. 1 ' 2 Such experiments by their nature provide information only on gross properties of nuclear states over a wide range of excitation energy above the yrast line. Data on the yrast line itself to very high spin will open up a domain of nuclear structure which has hitherto not been explored. In particular one might learn whether there is a general relation between the energies and spins of yrast states, as has been predicted for an independent-particle system, 3 and how shell effects modify this relation; whether dramatic shape changes are induced in nuclei by large angular moments; and how spin is generated with the least expenditure of energy.

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Second Discontinuity in the Yrast Levels ofEr158

Cited by 132 publications

References 19 publications

Gamma-spectroscopy within the island of high-spin isomers nearN=82

Gamma-spectroscopy within the island of high-spin isomers nearN=82

Third Discontinuity in the Yrast Levels ofEr158

Yrast Traps and Very High-Spin Yrast States inDy152

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