Search for very long-lived isomers in the hafnium-tungsten region

Abstract

Targets of 48Ca have been bombarded with 134,136Xe beams as part of a search for long-lived, high-K states in well-deformed nuclei with A ≈ 180. Several known isomers were observed by off-line γ-ray detection, and limits have been established for high-K isomer production in various isotopes of hafnium (A = 175-178), tantalum (A = 177-181), and tungsten (A = 177-181).