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Investigation of lifetimes in quadrupole bands of $^{142}$Gd

Abstract : For a level scheme investigation of ^{142}Gd an experiment with the $\gamma$-spectrometer EUROBALLIII has been carried out and lifetimes have been measured with EUROBALL IV using the Doppler-shift attenuation method. The high-spin states have been populated in these experiments by means of the ^{99}Ru(^{48}Ti, 2p3n) reaction at a beam energy of 240MeV and the ^{114}Sn(^{32}S, 2p2n) reaction at 160MeV, respectively. Reduced E2 transition probabilities B(E2) were determined for 15 members of four quadrupole bands. For the interpretation of the positive-parity even-spin quadrupole bands, calculations in the cranked Nilsson-Strutinsky as well as interacting boson models have been performed. From the former calculations it was concluded that the high-spin states of the (+ , 0)_{1} band in ^{142}Gd represent a triaxial nucleus rotating around the longest principal axis.
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Submitted on : Thursday, March 27, 2008 - 2:58:00 PM
Last modification on : Friday, May 8, 2020 - 1:10:03 AM

Citation

E.O. Lieder, A.A. Pasternak, R.M. Lieder, A.D. Efimov, V.M. Mikhajlov, et al.. Investigation of lifetimes in quadrupole bands of $^{142}$Gd. European Physical Journal A, EDP Sciences, 2008, 35, pp.135-158. ⟨10.1140/epja/i2007-10533-0⟩. ⟨in2p3-00267472⟩

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