Half-Lives of the Isomeric States ^(102m,g)Rh
Half-Lives of the Isomeric States ^(102m,g)Rh
Ye. Skakun(National Science Centre"Kharkiv Institute of Physics and Technology"); S. N. Utenkov(Kharkiv Institute of Physics and Technology); A. N. Dovbnya(Kharkiv Institute of Physics and Technology); S. M. Qaim(Institut fur Neurowissenschaften und Medizin); H. H. Coenen(Institut fur Neurowissenschaften und Medizin)
59권 23호, 1487~1490쪽
초록
The half-lives of the isomeric states ^(102m,g)Rh were determined by measuring their gamma-ray spectra using a Ge(Li)-detector over about 5 years. Two radioactive sources were used for this aim. One of them was produced by the ^(102m,g)Ru(^3He,x)^(102m,g)Rh reaction induced by ^3He ions of 31 MeV bombarding energy from the Julich cyclotron CV28. Another source was made by the photonuclear reaction ^(103)Rh(γ,n)^(102m,g)Rh using 22 MeV bremsstrahlung from the Kharkiv electron linear accelerator. The former reaction preferably populates the high-spin isomeric state and the latter the ground one. The half-lives were determined from the decay curves monitoring the intensities of the 475, (628 + 631), (692 + 695 + 697), 766, and 1046 keV γ-transitions following the ^(102m,g)Rh decay. Average weighted values of the half-lives amount to T^(1/2) = (3.47 ± 0.04) y and T^(1/2) = (207.2 ± 1.7) d for ^(102m)Rh and ^(102g)Rh, respectively.
Abstract
The half-lives of the isomeric states ^(102m,g)Rh were determined by measuring their gamma-ray spectra using a Ge(Li)-detector over about 5 years. Two radioactive sources were used for this aim. One of them was produced by the ^(102m,g)Ru(^3He,x)^(102m,g)Rh reaction induced by ^3He ions of 31 MeV bombarding energy from the Julich cyclotron CV28. Another source was made by the photonuclear reaction ^(103)Rh(γ,n)^(102m,g)Rh using 22 MeV bremsstrahlung from the Kharkiv electron linear accelerator. The former reaction preferably populates the high-spin isomeric state and the latter the ground one. The half-lives were determined from the decay curves monitoring the intensities of the 475, (628 + 631), (692 + 695 + 697), 766, and 1046 keV γ-transitions following the ^(102m,g)Rh decay. Average weighted values of the half-lives amount to T^(1/2) = (3.47 ± 0.04) y and T^(1/2) = (207.2 ± 1.7) d for ^(102m)Rh and ^(102g)Rh, respectively.
- 발행기관:
- 한국물리학회
- 분류:
- 물리학