Beta decay studies of the N=Z and waiting point nucleus<sup>72</sup>Kr

Briz, J. A.; Borge, María José García; Nácher, E.; Algora, A.; Rubio, B.

doi:10.1051/epjconf/20146602016

Cited by 1 publication

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“…A recoildistance lifetime measurement using knock-out reactions and a differential plunger confirmed the B E2; 2 0 1 1 [27], and by comparison with theoretical calculations [36-39, 46, 48] it was concluded that the relatively low B E2 ( ) value agrees better with the predictions for an oblate deformation. Also the comparison of the measured Gamow-Teller strength with theoretical calculations suggests oblate ground-state shape [49]. The lifetime measurement found a strong increase for the B E2; 4 2 1 1 ( )  + + value, which was interpreted as an indication for a rapid change from oblate to prolate shape with increasing spin within the ground-state band of 72 Kr [27].…”

Section: Shape Coexistence In a ≈ 70 Nuclei Close To The N = Z Linementioning

confidence: 72%

Coulomb excitation studies of shape coexistence in atomic nuclei

Görgen

Körten

2016

J. Phys. G: Nucl. Part. Phys.

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Low-energy Coulomb excitation provides a well-understood means of exciting atomic nuclei and allows measuring electromagnetic moments that can be directly related to the nuclear shape. The availability of radioactive ion beams (RIBs) at energies near the Coulomb barrier has made it possible to study shape coexistence in a variety of short-lived exotic nuclei. This review presents a short overview of the methods related to multi-step Coulomb excitation experiments, followed by a discussion of several examples. The focus is on two mass regions where recent Coulomb excitation experiments have contributed to the quantitative understanding of shape coexistence: nuclei with mass A 70 » near the N = Z line and nuclei with A 100 » near neutron number N = 60. Experimental results are summarized and their significance for understanding shape coexistence is discussed. Experimental observables such as quadrupole moments and electromagnetic transition strengths represent furthermore important benchmarks for advancing theoretical nuclear structure models. With several new RIB facilities planned and under construction, Coulomb excitation will remain to be an important tool to extend the studies of nuclear shapes toward more exotic systems, and to obtain a more comprehensive and quantitative understanding of shape coexistence.

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