Particle hole yrast states in146Gd and147Gd and the Z=64 shell closure

Kleinheinz, P.; Broda, R.; Daly, P.J.; Lunardi, S.; Ogawa, Masahiro; Blomqvist, J.

doi:10.1007/bf01408545

Cited by 188 publications

(82 citation statements)

References 20 publications

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“…Subtracting the separation energy for protons in 146 Gd and 147 Tb and correcting for pairing correlations, an energy gap of ≈2. 4 MeV between 2d 5/2 and the group of three free orbitals 3s 1/2 , 1h 11/2 , and 2d 3/2 (which lie within ≈260 keV of each other) [13] is obtained. In this article we deal with nuclei with Z > 64 and N > 82.…”

mentioning

confidence: 84%

Observations of the Gamow-Teller resonance in the rare-earth nuclei aboveGd146populated inβdecay

et al. 2016

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The rare-earth region of the nuclear table around the quasi-doubly magic nucleus 146 Gd is one of the very few places in which the Gamow-Teller (GT) resonance can be populated in β decay. The appropriate technique to study such a phenomenon is total absorption spectroscopy, thanks to which one can measure the B(GT) distribution in β-decay experiments even when it is very fragmented and lies at high excitation energy in the daughter nucleus. Results on the GT resonance measured in the β decay of the odd-Z, N = 83 nuclei 148 Tb, 150 Ho, and 152 Tm are presented in this work and compared with shell-model calculations. The tail of the resonance is clearly observed up to the limit imposed by the Q value. This observation is important in the context of the understanding of the "quenching" of the GT strength.

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confidence: 84%

Observations of the Gamow-Teller resonance in the rare-earth nuclei aboveGd146populated inβdecay

et al. 2016

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“…[4] 103.5 (1) 23 (3) 31(3) 106.5 (2) 11 (3) 7(1) 114.4 (1) 12 (2) 11(1) 151.4 (1) 81 (4) 72(6) 179.5 (5) 12 (1) 13(1) 235.7 (1) 73 (4) 70(4) 320.1 (1) 100 (6) 100(5) 337.4 (1) 19 (3) 18(1) 361.4 (1) 42 (4) 45(2) 529.6 (1) 25 (4) 17(1) 542.6 (1) 32 (4) 34(2) 656.9 (2) 11 (3) 8(1) 681.3 (1) 45 (5) 32(2) 726.2 (1) 78 (7) 67(5) 764.9 (3) 4(1)* 3(1) 1018.2 (1) 39 (5) 34(2) 1169.8 (3) 9(1)* 9(1) 1449.8 (2) 44 (6) 35 (3) FIG. 5.…”

Section: E γunclassified

“…The substantial evidence for a subshell gap at proton number Z = 64 [1] triggered a great deal of work on proton-rich nuclei in the A ≈ 150 mass region [2][3][4][5][6][7]. The similarities between the doubly magic nuclei 146 Gd and 208 Pb [1] and the expected influence of the proton-neutron interaction on structural features as observed in the 100 Sn region [3,[8][9][10]] also fueled further interest.…”

Section: Introductionmentioning

confidence: 99%

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Level structure above the 17+ isomeric state in Tm8369152

Singh¹,

Cullen²,

Taylor³

et al. 2018

Phys. Rev. C

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Excited states above the 17 + isomeric state in the proton-rich nucleus 152 Tm were established by employing the recoil-isomer tagging technique. Data were collected using the JUROGAM gamma-ray array and the GREAT spectrometer together with the recoil ion transport unit (RITU) gas-filled recoil separator and analyzed to identify the prompt and delayed γ decays from the levels in 152 Tm. Shell-model calculations, either in a large valence space or in a reduced model space with five protons in the π 0h 11/2 orbital and one neutron in the ν1f 7/2 orbital, agree with the observed energies of the yrast levels up to angular momentum J = 21. The observation of near degeneracies in the energy spectrum can be attributed to specific components of the proton-neutron interaction. The isomeric decay of the 17 + level is not reproduced in the shell-model calculations as it arises from a delicate balance between hindrance due to seniority selection rules and enhancement due to configuration mixing.

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“…The isovector SDI strength A 1 was fitted to reproduce the excitation energy of the 2 + 1 state in 134 Te. We have also considered an alternative set of proton particle energies suitable for A = 150 based on the assumption of a subshell closure at Z = 64 [35][36][37][38][39][40]. They were extracted from the excitation spectrum of 147 Tb.…”

Section: B Shell 50-82mentioning

confidence: 99%

Occupation probabilities of single particle levels using the microscopic interacting boson model: Application to some nuclei of interest in neutrinoless double-βdecay

Kotila

Barea

2016

Phys. Rev. C

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. (2016). Occupation probabilities of single particle levels using the microscopic interacting boson model: Application to some nuclei of interest in neutrinoless double-β decay. Physical Review C, 94 (3), 034320. doi:10.1103/PhysRevC.94.034320 2016 PHYSICAL REVIEW C 94, 034320 (2016) Occupation probabilities of single particle levels using the microscopic interacting boson model:Application to some nuclei of interest in neutrinoless double-β decay We have developed a new method to calculate the occupancies of single particle levels in atomic nuclei. This method has been developed in the context of the microscopic interacting boson model, in which neutron and proton degrees of freedom are treated explicitly. The energies of the single particle levels constitute a very important input for the calculation of the occupancies in this method. In principle these energies can be considered as input parameters that can be fitted to reproduce the experimental occupancies. Instead of fitting, in this study we have extracted the single particle energies from experimental data on nuclei with a particle more or one particle less than a shell closure. We provide the sets of these single particle energies suitable for several major shells and apply our method to calculate the occupancies of several nuclei of interest in neutrinoless double-β decay using these sets. Our results are compared with other theoretical calculations and experimental occupancies, when available.

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Particle hole yrast states in146Gd and147Gd and the Z=64 shell closure

Cited by 188 publications

References 20 publications

Observations of the Gamow-Teller resonance in the rare-earth nuclei aboveGd146populated inβdecay

Observations of the Gamow-Teller resonance in the rare-earth nuclei aboveGd146populated inβdecay

Level structure above the 17+ isomeric state in Tm8369152

Occupation probabilities of single particle levels using the microscopic interacting boson model: Application to some nuclei of interest in neutrinoless double-βdecay

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