Excited states and deformation of 112Xe

Smith, J. F.; Chiara, C. J.; Fossan, D. B.; LaFosse, D. R.; Lane, G. J.; Sears, J. M.; Starosta, K.; Devlin, M.; Lerma, F.; Sarantites, D. G.; Freeman, S. J.; Leddy, M. J.; Durell, J. L.; Boston, A. J.; Paul, E. S.; Semple, A. T.; Lee, I.-Y.; Macchiavelli, A. O.; Heenen, Paul‐Henri

doi:10.1016/s0370-2693(01)01339-9

Cited by 29 publications

(20 citation statements)

References 33 publications

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“…The shell model description of this isotope is a real challenge because the dimension of the basis in the full space calculation (number of M = 0 Slater determinants) is ∼ 10 10 Table V and compared with the available experimental data [22]. For the lowest part of the yrast band they closely resemble those of 110 Xe and the agreement with the experimental excitation energies is even better.…”

Section: B 112 Xementioning

confidence: 99%

Collectivity in the light xenon isotopes: A shell model study

et al. 2010

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The lightest xenon isotopes are studied in the shell model framework, within a valence space that comprises all the orbits lying between the magic closures N = Z = 50 and N = Z = 82. The calculations produce collective deformed structures of triaxial nature that encompass nicely the known experimental data. Predictions are made for the (still unknown) N = Z nucleus 108 Xe. The results are interpreted in terms of the competition between the quadrupole correlations enhanced by the pseudo-SU(3) structure of the positive parity orbits and the pairing correlations brought in by the 0h 11/2 orbit. We also have studied the effect of the excitations from the 100 Sn core on our predictions. We show that the backbending in this region is due to the alignment of two particles in the 0h 11/2 orbit. In the N = Z case, one neutron and one proton align to J = 11 and T = 0. In 110,112 Xe the alignment begins in the J = 10, T = 1 channel and it is dominantly of neutron-neutron type. Approaching the band termination the alignment of a neutron-proton pair to J = 11 and T = 0 takes over. In a more academic mood, we have studied the role of the isovector and isoscalar pairing correlations on the structure on the yrast bands of 108,110 Xe and examined the possible existence of isovector and isoscalar pairing condensates in these N ∼ Z nuclei.

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Section: B 112 Xementioning

confidence: 99%

Collectivity in the light xenon isotopes: A shell model study

et al. 2010

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“…At even higher spins, collective excitations give way to quasiparticle excitations leading to band termination [9,10]. On the other hand, the light isotopes with Z ≈ N ≈ 56 were predicted to be candidates for enhanced octupole collectivity [1,11]; evidence for strong octupole correlations was observed in the neutron-deficient nuclei 112,114−117 Xe [12][13][14][15] and 118,122−125 Ba [3,4,16,17]. Hence, it is of particular interest to extend spectroscopy studies toward more neutron- * Electronic address: liuzhong@impcas.ac.cn † Electronic address: seweryniak@anl.gov deficient nuclei in this region and approach the Z = N line as much as possible.…”

Section: Introductionmentioning

confidence: 99%

First identification of excited states in Ba117 using the recoil- β -delayed proton tagging technique

et al. 2017

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Excited states have been observed for the first time in the neutron-deficient nucleus 117 Ba using the Recoil-Decay Tagging technique following the heavy-ion fusion-evaporation reaction 64 Zn( 58 Ni, 2p3n)117 Ba. Prompt γ rays have been assigned to 117 Ba through correlations with β-delayed protons following the decay of A = 117 recoils. Through the analysis of the γ-γ coincidence relationships, a high-spin level scheme consisting of two bands has been established in 117 Ba. Based on the systematics of the level spacings in the neighboring barium isotopes, the two bands are proposed to have νh 11/2 [532]5/2 − and νd 5/2 [413]5/2 + configurations, respectively. The observed band-crossing properties are interpreted in the framework of cranked shell model.

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“…This is of particular use where nonrotational level schemes or components are experimentally established in the daughter nucleus [6]. In the current 113 Cs calculations, the experimental rotational spectrum of 112 Xe [36] was used as the core. Wave functions extracted from this model were then fixed and used consistently in both proton emission codes based on the approaches discussed in Ref.…”

Section: Discussionmentioning

confidence: 99%

Deformation of the proton emitterCs113from electromagnetic transition and proton-emission rates

Hodge¹,

Cullen²,

Taylor³

et al. 2016

Phys. Rev. C

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The lifetime of the (11/2 +) state in the band above the proton-emitting (3/2 +) state in 113 Cs has been measured to be τ = 24(6) ps from a recoil-decay-tagged differential-plunger experiment. The measured lifetime was used to deduce the deformation of the states using wave functions from a nonadiabatic quasiparticle model to independently calculate both proton-emission and electromagnetic γ-ray transition rates as a function of deformation. The only quadrupole deformation, which was able to reproduce the experimental excitation energies of the states, the electromagnetic decay rate of the (11/2 +) state and the proton-emission rate of the (3/2 +) state, was found to be β 2 = 0.22(6). This deformation is in agreement with the earlier proton emission studies which concluded that 113 Cs was best described as a deformed proton emitter, however, it is now more firmly supported by the present measurement of the electromagnetic transition rate.

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Excited states and deformation of 112Xe

Cited by 29 publications

References 33 publications

Collectivity in the light xenon isotopes: A shell model study

Collectivity in the light xenon isotopes: A shell model study

First identification of excited states in Ba117 using the recoil- β -delayed proton tagging technique

Deformation of the proton emitterCs113from electromagnetic transition and proton-emission rates

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