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HK: Fachverband Physik der Hadronen und Kerne

HK 53: Structure and Dynamics of Nuclei XI

HK 53.4: Talk

Wednesday, March 13, 2024, 18:30–18:45, HBR 19: C 5b

Lifetime measurement of the 4₁⁺ state of ¹³²Te — •H. Mayr¹, T. Stetz¹, V. Werner¹, M. Beckers², A. Blazhev², A. Esmaylzadeh², B. Falk², J. Fischer², R.-B. Gerst², K. Gladnishki³, K.E. Ide¹, V. Karayonchev⁴, E. Kleis², H. Kleis², L. Klöckner², P. Koch², D. Kocheva³, C.M. Nickel¹, A. Pfeil², N. Pietralla¹, G. Rainovski³, F. Spee², M. Stoyanova³, and R. Zidarova¹ — ¹TU Darmstadt — ²U Cologne — ³U Sofia, Bulgaria — ⁴TRIUMF Vancouver, Canada

Valuable information on the structure of atomic nuclei can be obtained from comparatively simple experimental information, such as ratios of excitation energies (R_4/2) or E2 transition rates (B_4/2) of the first 2⁺ and 4⁺ states of even-even nuclei. The measurement of lifetimes of the 2₁⁺ and 4₁⁺ states is necessary to calculate the B_4/2 ratio. Experimental data for the lifetimes of the 4₁⁺ states in the tellurium isotopes towards N=82 is scarce. The measurement of the lifetime of the 4₁⁺ state of ¹³²Te would yield its B_4/2 ratio. It would expand the data on the evolution of this quantity in the chain of tellurium isotopes. Therefore, an experiment was performed at the IKP Cologne to produce ¹³²Te in the two-neutron transfer reaction ¹³⁰Te(¹⁸O, ¹⁶O)¹³²Te and determine the desired 4₁⁺ lifetime via the Recoil Distance Doppler-Shift method. The results will be presented and compared to a recent publication that obtained the lifetime of the 4₁⁺ state with the γ-γ fast-timing approach [1].

[1] D. Kumar et al. In: Phys. Rev. C 106 (3 2022).

*Supported by the BMBF under grant number 05P21RDFN9.