Speaker
Description
I will present two subjects on deformed shapes. The first subject is recent findings about the superdeformed band in 62Ni and its evolution in more neutron-rich exotic isotopes.
While this band has been known for higher spins [1], its band members down to 0 have been recently clarified theoretically and experimentally with advanced methodologies on both sides [2]. It is a triaxial band as demonstrated by Monte Carlo Shell Model calculation [3], and the J=0+ state is identified though fragmentated, as experimentally confirmed in Bucharest and Grenoble. This band follows type-1 and -2 shell evolution scenarios [4,5] to come down in energy up to 70Ni [3,6-8].
The second subject is about the time evolution of an intrinsic state contained in an eigenstate in the laboratory frame, which is isotropically superposed for J=0. It will be shown how this intrinsic state remains or changes as time goes by, with remarkable features with "standing time" concept [9]. This may open new scopes to reactions such as fusion and fission (all in favor), as well as the shape measurement by Relativistic Heavy-Ion Collision, providing a feasibility argument.
[1] M. Albers et al., Phys. Rev. C 94, 034301 (2016).
[2] C. Costache, Y. Tsunoda, S. Leoni, B. Fornal, N. Marginean, R. V. F. Janssens, T. Otsuka et al., in preparation.
[3] Y. Tsunoda et al., Phys. Rev. C 89, 031301(R) (2014).
[4] T. Otsuka and Y. Tsunoda, J. Phys. G, 43, 024009 (2019).
[5] Y. Tsunoda and T. Otsuka, "Configuration Interaction Approach to Atomic
Nuclei: The Shell Model", in "Handbook of Nuclear Physics" (Springer, Singapore, 2022).
[6] N. Marginean et al., Phys. Rev. Lett. 125, 102502 (2020).
[7] S. Leoni et al., Phys. Rev. Lett. 118, 162502 (2017).
[8] A. I. Morales et al., Phys. Lett. B 765, 328 (2017).
[9] T. Otsuka and Y. Tsunoda, in preparation.
| Contribution category | Theory |
|---|---|
| Presenter status | Faculty/Staff |