Abstract
Abstract Isomeric decays with multipolarity $$\lambda \ge 3$$ λ ≥ 3 are discussed. Parity changing E 3, M 4, E 5 decays are more widespread within the nuclide chart when compared to parity conserving M 3, E 4 and M 5 transitions, which is the consequence of the properties of the nuclear shell model. The E 3 transitions around $$^{208}$$ 208 Pb are classified depending on their origins. Systematics of M 4 and E 5 transitions are presented. These provide an excellent test to the study of shell evolution in different parts of the nuclide chart as well as the nature of the effective charges.