München 2006 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 24: Kernphysik/Spektroskopie

HK 24.1: Group Report

Tuesday, March 21, 2006, 17:00–17:30, C

Relativistic Projectile Coulomb Excitation to the Yrast and Non-yrast2⁺ States with the Rare Isotope Beams of ¹³⁴Ce and ¹³⁶Nd — •T.R. Saito¹, N. Saito¹, K. Starosta², D.L. Balabanski³, A. Bracco⁴, and C.M. Petrache⁵ — ¹GSI — ²NSCL, MSU — ³University of Sofia — ⁴Universitä di Milano — ⁵Camerino and INFN Perugia

Relativistic Coulomb excitation of ¹³⁴Ce and ¹³⁶Nd projectiles at approximately 100 A MeV on a gold target with a thickness of 0.4 g/cm² was performed with the RISING-FRS setup at GSI in order to measure reduced E2 transition probability, B(E2), of the transitions depopulating the second 2⁺ states, which could provide unique information on the nuclear triaxiality. Single-step Coulomb excitation to the first and second 2⁺ states has been observed with measurements of γ -rays depopulating these states by the RISING germanium detector array with EUROBALL cluster and MINIBALL detectors, and B(E2) of transitions from these states have been deduced by normalizing to the known B(E2) of the transition from the first 2⁺ state to the ground state in ¹³⁴Ce. Particle-γ angular correlation of the E2 transition from the first 2⁺ state in ¹³⁴Ce has been measured, and an isotropic distribution has been observed.