Shape coexistence revealed in the $$N=Z$$ isotope $$^{72}$$Kr through inelastic scattering
2020
The
$$N=Z=36$$
nucleus
$$^{72}$$
Kr has been studied by inelastic scattering at intermediate energies. Two targets,
$$^{9}$$
Be and
$$^{197}$$
Au, were used to extract the nuclear deformation length,
$$\delta _\text {N}$$
, and the reduced E2 transition probability, B(E2). The previously unknown non-yrast
$$2^+$$
and
$$4^+$$
states as well as a new candidate for the octupole
$$3^-$$
state have been observed in the scattering on the Be target and placed in the level scheme based on
$$\gamma -\gamma $$
coincidences. The second
$$2^+$$
state was also observed in the scattering on the Au target and the
$$B(E2;\;2^+_2 \rightarrow 0^+_1)$$
value could be determined for the first time. Analyzing the results in terms of a two-band mixing model shows clear evidence for a oblate-prolate shape coexistence and can be explained by a shape change from an oblate ground state to prolate deformed yrast band from the first
$$2^+$$
state. This interpretation is corroborated by beyond mean field calculations using the Gogny D1S interaction.
Keywords:
- Correction
- Source
- Cite
- Save
- Machine Reading By IdeaReader
41
References
7
Citations
NaN
KQI