کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5499237 | 1533487 | 2017 | 5 صفحه PDF | دانلود رایگان |
- Measurement made of EM transition probabilities from low-lying IÏ=9/2- states in 183Re.
- ROSPHERE gamma-ray array used to isolating discrete gamma-ray cascades.
- Derived the reduced hindrances of E1 transitions in 183Re related to K-quantum number conservation.
This paper presents precision measurements of electromagnetic decay probabilities associated with electric dipole transitions in the prolate-deformed nucleus 183Re. The nucleus of interest was formed using the fusion evaporation reaction 180Hf(7Li,4n)183Re at a beam energy of 30Â MeV at the tandem accelerator at the HH-IFIN Institute, Bucharest Romania. Coincident decay gamma rays from near-yrast cascades were detected using the combined HPGe-LaBr3 detector array ROSPHERE. The time differences between cascade gamma rays were measured using the LaBr3 detectors to determine the half-lives of the two lowest lying spin-parity 9/2- states at excitation energies of 496 and 617Â keV to be 5.65(5) and 2.08(3) ns respectively. The deduced E1 transition rates from these two states are discussed in terms of the K-hindrance between the low-lying structures in this prolate-deformed nucleus.
Journal: Radiation Physics and Chemistry - Volume 137, August 2017, Pages 7-11