Izvorni znanstveni članak
Perturbed 208.00 -59.54 keV gamma-gamma angular correlation in 231Np
A. Z. Hrynkiewicz
; Institute for Nuclear Physics (IFJ), Cracow
S. Ogaza
; Institute for Nuclear Physics (IFJ), Cracow
J. Styczen
; Institute for Nuclear Physics (IFJ), Cracow
B. Hrastnik
; Institute "Ruđer Bošković", Zagreb
I. Basar
; Institute "Ruđer Bošković", Zagreb
Sažetak
The perturbed directional 208.00 - 59.54 keV gamma-gamma angular correlation was measured in 237Np. The static hyperfine coupling between the nuclear magnetic moment and the angular momentum of the electronic states was found present both in the liquid source and in the polycrystallinic source. The spin sequence for the 208.00 → 59.54 → O keV transition was confirmed to be 3/3, 5/2, 5/2 with the mixing ratio δ = + 0.145 for the E2 admixture in the preferably M1 transition. The agreement between directional correlation and internal conversion data was shown to be fairly good. The angular momentum J of the electronic states was determined for both sources : for the polycrystallinic source the J = 1 value gives the attenuation factor G22 (t)J-1 in good agreement with the experimental results, while for the liquid source, the best J value was shown to be J = 3/2. The J-dependent hyperfine structure constant a was determined for the polycrystalinic source as a/ħ = 83 ± 3 MHz and for the liquid source as a/ ħ = 44 ± 2 MHz. The average magnetic field at the place of 237Np nuclei was deduced for the polycrystallinic source H (O)J-1 = 54 ± 14 [kOe] and for the liquid source H (O)J-3/2 = 42 ± 12 [kOe].
Ključne riječi
Hrčak ID:
308940
URI
Datum izdavanja:
3.3.1968.
Posjeta: 108 *