Dresden 2000 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 16: Postersitzung / Kernphysik

HK 16.12: Poster

Thursday, March 23, 2000, 10:15–12:45, B 69

Lifetimes measurements of high-spin states in the transitional nucleus ¹⁰¹Ag — •E. Galindo¹, A. Jungclaus¹, D. Kast¹, K.P. Lieb¹, A. Müller¹, M. Górska^2,3, H. Grawe², G. de Angelis⁴, C. Fahlander⁴, M. de Poli⁴, A. Dewald⁵, R. Peusquens⁵, H. Tiesler⁵, P.G. Bizzeti⁶, and P. Sona⁶ — ¹Universität Göttingen — ²GSI, Darmstadt — ³University of Warsaw — ⁴INFN Legnaro — ⁵Universität zu Köln — ⁶INFN Firenze

The transitional nucleus ¹⁰¹Ag has an interesting structure, which shows a typical single-particle behavior for the low-excited states and collectivity for the high-spin states [1]. In order to extend the information about this nucleus the reaction ⁵⁸Ni(⁵⁰Cr,α3p) at 205 MeV was studied by means of the gamma-spectrometer GASP at the INFN in Legnaro. The RDDS technique was used at a total of 12 flight distances ranging from 12 µm to 7 mm [2] and the DDCM method was used for the analysis of the γ-γ data. Lifetimes in the range 0.6 - 12 ps were measured showing a clear domain of multi-particle shell modell structure up to spin 23/2 ℏ at both parities.

[1] B. Crowell et al. Phys. Rev. C45 (1992) 1564.

[2] D. Kast et al. Eur. Phys. J. A 3 (1998) 115.