Study of the \(B_{4/2}\) Anomaly in the Yrast States of \(^{167}\)Os
I. Zanon, Bo Cederwall, Thomas Bäck, E. Ahlgren Cederlöf, Maria Doncel, G. Appagere, P.-E. Tegnér, T. Grahn, Kalle Auranen, V. Bogdanoff, Andrew D. Briscoe, Paul T. Greenlees, H. Joukainen, Rauno Julin, H. Jutila, J. Louko, M. Luoma, J. Pakarinen, A.M. Plaza, P. Rahkila · Acta Physica Polonica B Proceedings Supplement · 2025
In recent years, several cases of nuclei presenting the so-called “\(B_{4/2}\) anomaly” have been observed in the neutron-deficient region close to \(Z=50\) and \(Z=82\). In the last region, the osmium isotopic chain is of particular interest, as three consecutive isotopes, \(^{168,169,170}\)Os, have shown the presence of this peculiar phenomenon. An experiment aimed at extending the study to \(^{167}\)Os was performed at the Accelerator Laboratory of the University of Jyväskylä, using a beam of \(^{78}\)Kr at 360 MeV impinging on a \(^{92}\)Mo target. Lifetimes of several low-lying states were measured using the Recoil-Distance Doppler Shift method. The preliminary analysis and the study of the influence of unobserved feeders are discussed. Abstract Published by the Jagiellonian University 2025 authors