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Article
Report number	arXiv:1006.5885
Title	Magnetic moment of $^{104}$Ag$^m$ and the hyperfine magnetic field of Ag in Fe using nuclear magnetic resonance on oriented nuclei
Related title	Magnetic moment of Ag-104(m) and the hyperfine magnetic field of Ag in Fe using nuclear magnetic resonance on oriented nuclei
Author(s)	Golovko, V.V. (Leuven U.) ; Kraev, I.S. (Leuven U.) ; Phalet, T. (Leuven U.) ; Delaure, B. (Leuven U.) ; Beck, M. (Leuven U.) ; Kozlov, V.Yu. (Leuven U.) ; Coeck, S. (Leuven U.) ; Wauters, F. (Leuven U.) ; Herzog, P. (Bonn U., HISKP) ; Tramm, Ch. (Bonn U., HISKP) ; Zakoucky, D. (Rez, Nucl. Phys. Inst.) ; Venos, D. (Rez, Nucl. Phys. Inst.) ; Srnka, D. (Rez, Nucl. Phys. Inst.) ; Honusek, M. (Rez, Nucl. Phys. Inst.) ; Koster, U. (Laue-Langevin Inst. ; CERN) ; Severijns, N. (Leuven U.)
Publication	2010
Imprint	01 Jul 2010
Number of pages	12
In:	Phys. Rev. C 81 (2010) 054323
DOI	10.1103/PhysRevC.81.054323
Subject category	Nuclear Physics - Experiment
Accelerator/Facility, Experiment	CERN ISOLDE
Abstract	Nuclear magnetic resonance (NMR/ON) measurements with beta- and gamma-ray detection have been performed on oriented Ag-104(g,m) nuclei with the NICOLE He-3-He-4 dilution refrigerator setup at ISOLDE/CERN. For Ag-104(g) (I-pi = 5(+)) the gamma-NMR/ON resonance signal was found at nu = 266.70(5) MHz. Combining this result with the known magnetic moment for this isotope, the magnetic hyperfine field of Ag impurities in an Fe host at low temperature (< 1 K) is found to be vertical bar B-hf(AgFe)vertical bar = 44.709(35) T. A detailed analysis of other relevant data available in the literature yields three more values for this hyperfine field. Averaging all four values yields a new and precise value for the hyperfine field of Ag in Fe; that is, vertical bar B-hf(AgFe)vertical bar = 44.692(30) T. For Ag-104(m) (I-pi = 2(+)), the anisotropy of the beta particles provided the NMR/ON resonance signal at nu = 627.7(4) MHz. Using the new value for the hyperfine field of Ag in Fe, this frequency corresponds to the magnetic moment mu(Ag-104m) = +3.691(3) mu(N), which is significantly more precise than previous results. The magnetic moments of the even-A Ag102 -110 isotopes are discussed in view of the competition between the (pi g(9/2))(7/2+)(-3)(nu d(5/2)nu g(7/2))(5/2+) and the (pi g(9/2))(9/2+)(-3)(nu d(5/2)nu g(7/2))(5/2+) configurations. The magnetic moments of the ground and isomeric states of Ag-104 can be explained by an almost complete mixing of these two configurations.
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