[en] Precise hyperfine field value of zinc in iron has been determined by nuclear magnetic resonance on oriented nuclei (NMR/ON): B_hf (ZnFe)=-18.785(35) T at 7 mK. The relaxation constant of Zn in iron is established C_K=14(3) Ks. The new hyperfine field value of zinc in iron allows a more precise reevaluation of the magnetic moments of ^69mZn and ^71mZn measured with NMR/ON. (orig.)

[en] The authors describe the measurement of the ¹⁹³Os(3/2^-) magnetic moment using the Moessbauer effect and nuclear orientation. (Auth.)

[en] The low-temperature orientation of ¹⁹³Os in an iron matrix and the Moessbauer effect of the 73 keV transition lead to μ(¹⁹³Ossub(GS)=0.75(3)μsub(N). The gamma-ray distribution coefficients combined with a quadrupole alignment measurement from the literature give Q(¹⁹³Ossub(GS)=+0.48(6)b. Several mixing parameters in ¹⁹³Ir are also determined. The odd-mass Os nuclei are discussed in the light of mixing between Nilsson orbitals. (author)

No abstract available

[en] Highlights: • Geographical information system based Multi-Criteria Decision analysis was applied. • An analytical hierarchy process is used to assign weights to the criteria. • 24% of the total surface area of the region is suitable for solar farms. • HOMER was used to analyze the feasibility of 10 MW photovoltaic grid-connected. -- Abstract: It is now well established that solar energy is a reliable alternative way to reduce greenhouse gas emissions and to mitigate climate change effects. In Morocco, solar energy investments are rapidly rising since 2009 and are expected to grow dramatically in the next decade. Site selection is a critical issue when large-scale solar plants are being planned. In this paper, the multi-criteria evaluation method is used to identify suitable sites to host Photovoltaic projects in southern Morocco. For this purpose, geographical information systems and analytic hierarchy process methods were combined to represent a high-resolution map that compares the potential of the studied region to host large-scale Photovoltaic projects. HOMER software was then used for modeling and simulating a 10 MW grid-connected PV system. The optimum scheme is analyzed to assess the economic feasibility in the most suitable site in the Souss-Massa region. The findings from this study confirm that 24.08% of the studied area offers suitable sites to host the Photovoltaic farms. The HOMER simulation has clearly shown that the grid-connected Photovoltaic system is beneficial in the long run, although its initial capital is higher than the grid supply only. Also, the cost of electricity generated from Photovoltaic panels is affordable.

[en] ¹²⁵Te and ¹²⁹I Moessbauer spectra were studied of AuTe₂, AuAgTe₄, and AuCuTe₄. A distribution in hyperfine parameters is needed to obtain a satisfactory fit of the ¹²⁹I spectra, and is interpreted in favor of lattice displacement waves recently observed in these compounds. (Auth.)

[en] Magnetic moments around the Z=40 shell closure have been established using nuclear magnetic resonance on oriented nuclei (NMR/ON) in iron. From the resonance frequencies we established vertical strokeμ(⁹¹Y; 9/2⁺)vertical stroke=5.96(6)μ_N,vertical stroke μ(⁹⁵Zr; 5/2⁺)vertical stroke=1.103(23)μ_N, vertical strokeμ(⁹⁷Nb; 9/2⁺)vertical stroke=6.153(5)μ_N. From the electric quadrupole alignment of ⁹⁵Zr+⁹⁵Nb in a Zr single crystal Q(⁹⁵Zr)=+0.29(5)b and Q(⁹⁵Nb)<0 have been derived. The results obtained are discussed using the Nilsson deformed single particle model. It is shown that for certain deformation regions, a measurement of the magnetic moment can give information on the nuclear quadrupole deformation. (orig.)

[en] The level crossing and level mixing resonance methods have been developed in order to enable the measurement of quadrupole interaction frequencies of nuclei with lifetimes between microseconds and minutes in solids. Both methods are shown to be better suited for application in this lifetime region than the existing ones. Only the level mixing resonance method can be applied to nuclei with lifetimes up to several minutes. A review of level crossing and level mixing experiments is given. (Auth.)

[en] First experiments in the systematic study of the structure of ground states and isomeric states of Br isotopes as function of neutron number of ISOLDE, CERN are reported. The isotopes ^{74g,74m,77,78,84g,84m}Br have been implanted into iron and studied with the techniques of low temperature nuclear orientation and nuclear magnetic resonance of oriented nuclei (NMR/ON). The experiments were performed with the NICOLE on-line nuclear orientation set-up using the isotope separator ISOLDE-3. NMR/ON experiments were successful for ^74mBr with continuous on-line implantation and for ⁷⁷Br. Using as value of the hyperfine field B_hf(BrFe)=+81.35(3) T we obtain vertical strokeg(^74mBr)vertical stroke=0.455(3) and vertical strokeg(⁷⁷Br)vertical stroke=0.6492(3). Static nuclear orientation data have been measured for all above mentioned isotopes. From these data we derive vertical strokeμ(⁷⁸Br, I=1)vertical stroke=0.13(3) and vertical strokeμ(⁸⁴⁹Br, I=2)vertical stroke=1.9(7). The results are discussed within the systematics of the bromine isotopes. (orig.)

[en] The quadrupole moment ratio of ¹⁰⁷Ag/sup m/ to ¹⁰⁹Ag/sup m/ has been determined as Q(¹⁰⁷Ag/sup m/)/Q(¹⁰⁹Ag /sup m/) = 0.960(10) with the level mixing resonance on oriented nuclei technique. Using the previously established electric field gradient of silver in zinc, Q(¹⁰⁷Ag/sup m/) = 0.98(11) b has been deduced. The results are in agreement with the theoretical predictions