Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems.

Two odd-odd nuclei from the A ∼ 100 and A ∼ 130 regions, namely ¹⁰²Rh and ¹³⁴Pr have been studied in search for chiral doublet bands via ⁹⁴Zr(¹¹B,3n)¹⁰²Rh and ¹¹⁹Sn(¹⁹F,4n)¹³⁴Pr reactions, respectively. Two nearly degenerate bands built on the πg_9/2 ⊗ ?h_11/2 configuration have been identified in ¹⁰²Rh and on the πg_11/2 ⊗ ?h_11/2 configuration for ¹³⁴Pr. Lifetimes of excited nuclear states were measured using Dopplershift attenuation method and recoil distance Doppler-shift method. The deexciting gamma rays were registered by the Indian National Gamma Array for ¹⁰²Rh and using the EUROBALL IV detector array with an inner Bismuth Germanate (BGO) ball for ¹³⁴Pr, respectively. Polarization and angular correlation measurements have been performed to establish the spin and parity assignments for these bands. The derived reduced transition probabilities are compared to the predicitons of the two quasiparticles + triaxial rotor and interacting boson fermion-fermion models. [ABSTRACT FROM AUTHOR]