Spectroscopy of neutron deficient 108Te

Sohler, D.; Cederkäll, J.; Dombrádi, Zs.; Persson, Jonas; Cederwall, B.; Johnson, A.; Norlin, L. O.; Weiszflog, M.; Ataç, A.; Blomquist, J.; Kerek, A.; Klamra, W.; Kownacki, J.; Lipoglavšek, M.; Mitarai, S.; Nyberg, J.; Ha, Roth; Sletten, G.

doi:10.1007/s100500050169

Cited by 12 publications

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“…and the 4 + → 2 + transitions are the same, within the statistical uncertainties, in the present experiment. The level scheme and feeding patterns of 108 Te are well known from earlier experiments [19,20]. The lack of side feeding to the 2 + state is related to the nonobservation of the 3 − state in the negative parity band, as was discussed by Lane et al [20].…”

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confidence: 92%

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Lifetime measurement of the first excited2+state in108Te

Bäck

Moradi

et al. 2011

Phys. Rev. C

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The lifetime of the first excited 2 + state in the neutron deficient nuclide 108 Te has been measured for the first time, using a combined recoil decay tagging and recoil distance Doppler shift technique. The deduced reduced transition probability is B(E2;0 + g.s. → 2 + ) = 0.39 +0.05 −0.04 e 2 b 2 . Compared to previous experimental data on neutron deficient tellurium isotopes, the new data point constitutes a large step (six neutrons) toward the N = 50 shell closure. In contrast to what has earlier been reported for the light tin isotopes, our result for tellurium does not show any enhanced transition probability with respect to the theoretical predictions and the tellurium systematics including the new data is successfully reproduced by state-of-the-art shell model calculations.The structure of atomic nuclei near the presumed doubly magic nucleus 100 Sn has been at the focus of numerous experimental and theoretical studies. As we approach the N = Z line and the closed shells at 100 Sn, the shell structure is of fundamental interest for our understanding of the nature of the nucleon-nucleon interaction inside the nucleus. The experimental efforts to extend the energy spectroscopy in the region is ongoing, and continues to give new information. But in order to probe the models further, and to be able to explain new phenomena complementary measurements of other quantities, such as nuclear masses and transition probabilities, are just as important. In the neutron deficient even-mass Sn isotopes a series of experiments using Coulomb excitation have revealed B(E2;0 + g.s. → 2 + ) systematics that could not easily be explained by theoretical calculations [1][2][3][4]. Neither the intuitive scheme of generalized seniority [5], nor standard large-scale shell model calculations could so far reproduce the experimental data. As we decrease the number of neutrons from midshell and approach the N = 50 shell gap, the reduced transition probabilities are expected to drop, according to such model predictions. However, the experimental results reported for the neutron deficient Sn isotopes, albeit with large uncertainties, lie more or less constant around the mid-shell values. This unusual feature has been discussed in terms of a "weakening" of the N = Z = 50 shell closures [4]. As the most relevant shell-model orbitals above the Fermi surface are the same for the 50 Sn and 52 Te isotopes, i.e., g 7/2 , d 5/2 , d 3/2 , s 1/2 , h 11/2 , we would expect that B(E2) data

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“…The error bars reflect statistical uncertainties of Q. The uncertainty in d is below 1 μm for all data points, except at 957(19) μm.…”

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confidence: 98%