scholarly journals Nuclear Orientation of 152Eu in Gold

1983 ◽  
Vol 36 (2) ◽  
pp. 127 ◽  
Author(s):  
PJ Blamey ◽  
D Bingham ◽  
JA Barclay ◽  
JD Cashion
Keyword(s):  
Hyperfine Interaction ◽  
Angular Correlation ◽  
Decay Scheme ◽  
Nuclear Orientation ◽  
Temperature Range ◽  
Mixing Ratios ◽  
Gamma Transitions

Nuclear orientation of 152Eu in gold in the temperature range 9 mK-1 K has been used to determine the mixing ratios of a number of gamma transitions and the multipolarities of several beta transitions of the 152Eu decay scheme. The results agree closely with those from y-y and y-p angular correlation measurements where these have been done. Our results on the" hyperfine interaction of 152Eu in gold contradict those previously published.

Nuclear g factors of three levels of 192Pt

1969 ◽  
Vol 47 (21) ◽  
pp. 2395-2399 ◽  
Author(s):  
D. B. Kenyon ◽  
L. Keszthelyi ◽  
J. A. Cameron
Keyword(s):  
Hyperfine Field ◽  
Angular Correlation ◽  
Iron Alloy ◽  
Scintillation Detectors ◽  
Angular Correlations ◽  
Mixing Ratios ◽  
G Factors

The g factors of the 316, 612, and 785 keV levels of 192Pt have been measured using gamma–gamma angular correlations perturbed by the hyperfine field in an iron alloy. Sources were 192Ir in 1 at.% Ir Fe alloy. Coincidences were observed using a combination of Ge(Li) and scintillation detectors. For the three levels, the g factors obtained were[Formula: see text]In addition, the E2/M1 mixing ratios were obtained from the angular correlation measurements.[Formula: see text]

Spins of Levels in 32P by Angular-Correlation Studies

1971 ◽  
Vol 49 (23) ◽  
pp. 2931-2937 ◽  
Author(s):  
C. St-Pierre ◽  
R. Gagnon ◽  
G. S. Gill
Keyword(s):  
Angular Correlation ◽  
Decay Scheme ◽  
Correlation Method ◽  
Spectroscopic Properties ◽  
Angular Correlations ◽  
Correlation Studies ◽  
Other Information

The spectroscopic properties of the 1.75, 2.66, 2.74, and 3.00 MeV levels of 32P have been studied by the particle–gamma angular-correlation method II of Litherland and Ferguson applied to the reaction 29Si(α,p)32P at 10.3 MeV. The decay scheme was observed with a Ge–Li detector in coincidence with the protons. The spin of the 1.75 MeV level was determined to be 3. The restrictions imposed on J by the analysis of the angular correlations combined with other information lead to the following most probable assignments: 2.66 MeV, J = 1,2; 2.74 MeV, J = 1,2; 3.00 MeV, J = 1,2,3.

scholarly journals Perturbed Angular Correlation Studies in SrTiO3 Single Crystals

2000 ◽  
Vol 55 (1-2) ◽  
pp. 237-241
Author(s):  
P. de la Presa ◽  
K. P. Lieb ◽  
M. Uhrmacher ◽  
L. Ziegeler
Keyword(s):  
Angular Correlation ◽  
Perturbed Angular Correlation ◽  
Hyperfine Interactions ◽  
Correlation Spectroscopy ◽  
Quadrupole Frequency ◽  
Perturbed Angular Correlation Spectroscopy ◽  
Temperature Range ◽  
Field Gradients ◽  
Electronic Defects ◽  
Asymmetry Parameters

The quadrupole hyperfine interactions of 111Cd/111 In probe nuclei in single-crystalline SrTiO3 perovskite samples were investigated using Perturbed Angular Correlation spectroscopy. Three electric field gradients were detected and their fractions and hyperfine parameters were measured in the temperature range from 26 to 700 K. The fraction f0 having a vanishing quadrupole frequency, as expected for 111Cd on substitutional sites in a cubic lattice, starts to develop around 300 K and reaches 100% at 700 K. Two well-defined EFG's having closely lying quadrupole frequencies and asymmetry parameters of ωQi = 49.1(3) Mrad/s, 77, η0= 0.10(2) and ωQ2 = 51.8(3) Mrad/s, η2 = 0.12(2), at room temperature, were identified in the temperature range from 250 to 530 K, and their (100) orientation in the lattice was determined. They are associated with electronic defects at the probe atoms.

The determination of hyperfine interaction fields in neutron irradiated cobalt by nuclear orientation techniques

1967 ◽  
Vol 296 (1444) ◽  
pp. 71-81
Keyword(s):  
Excited State ◽  
Hyperfine Interaction ◽  
Single Crystal ◽  
Hyperfine Field ◽  
Thermal Neutron ◽  
Nuclear Orientation ◽  
Cobalt Atom ◽  
Interaction Field ◽  
Thermal Neutron Irradiation

The hyperfine interaction field on 60 Co nuclei formed by thermal neutron irradiation of a single crystal of hexagonal cobalt at 4°K was determined from measurements of the anisotropy of γ -radiation emitted when the sample was cooled to about 0·012°K. These measurements were repeated after the sample had been annealed successively at 20, 77 and at 300°K. A reduction of (6 ± 4) % in the hyperfine field on the 60 Co nuclei was observed after annealing out the radiation damage. This result is discussed in terms of the positions in the lattice which might be occupied by a cobalt atom after the recoil caused by the γ -decay of the 8 MeV excited state of a 60 Co nucleus immediately after its formation.

Nuclear alinement of manganese-56

1959 ◽  
Vol 250 (1263) ◽  
pp. 550-561 ◽  
Keyword(s):  
Angular Distribution ◽  
Excited State ◽  
Angular Correlation ◽  
Excited States ◽  
Daughter Nucleus ◽  
Γ Radiation ◽  
Mixing Ratios ◽  
First Excited State ◽  
Γ Rays ◽  
Coincidence Measurements

The present work demonstrates the feasibility of alining manganese-56 produced by neutron irradiation of a nickel fluosilicate crystal containing stable 55 Mn. Measurements were made of the angular distribution of the γ-radiation from the alined 56 Mn and also of the angular correlation of the γ-rays from this isotope. By combining the results it is possible to establish uniquely as 2 the spins of the states of the daughter nucleus of 56 Fe at 2.66 and 2.98 MeV. The mixing ratios δ ( E 2/ M 1) for the 1.81 and 2.13 MeV γ-rays to the first excited state are shown to be 0.19 ± 0.02 and — 0.28 ± 0.02. The spectrum of the γ-radiation was studied with a scintillation spectrometer and this leads to the following relative intensities; 0.845 MeV (100%), 1.81 MeV (27 ± 3%), 2.13 MeV (15 ± 3%), 2.55 MeV (1.2 ± 0.2%), 2.66 MeV (0.65 ± 0.1%), 2.98 MeV (0.35 ± 0.1%) and 3.4 MeV (0.22 ± 0.05%). Coincidence measurements suggest that the 2.55 and 3.4 MeV γ-rays are due to de-excitation of a level at about 3.4 MeV which decays both to the ground and first excited states. A spin of 2 for this state is proposed.

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