Pseudo-mirror nuclei in the mass regions A~ 170 and A~ 200

Abstract

The concept of pseudo-mirror nuclei is based on NπNν scheme introduced as an extension of NpNnscheme. The NπNν scheme tells us that if two nuclei from different mass region have equal number of integrated n-p interaction than the experimental observables E(2+), E(4+)/E(2+) and B(E2; 2+→ 0+) are expected to be almost equal, therefore equal number of n-p interaction build similar level schemes up to certain spin quantum numbers. Pseudo-mirror nuclei have been introduced for the first time in the mass regions A ~ 100 and A ~ 130 for Mo, Zr, Nd and Ce nuclei. Later, a systematic work carried out over a broad region of Segre chart showed that not only the excitation energies but also related B(E2) values of excited states in Pseudo-mirror nuclei (PMN) are in good agreement. In the present work, we present new pseudo-mirror nuclei in the mass region A ~ 170 and A ~ 200 for the first time.