Magnetic moment of the 308 keV state in48V

The g-factor of the 308 keV 2⁺ state in⁴⁸V has been measured by means of the time differential perturbed angular correlation technique, following the implantation of⁴⁸Cr activity into ferromagnetic iron in the reaction⁴⁶Ti(,2n)⁴⁸Cr. We obtained g = 0.222(8) and a substitutional fraction of f₁>80%.     

The quadrupole moment of the 66 keV, 5/2− state of73As

⁷³Se was produced by proton irradiation of polycrystalline arsenic. The quadrupole interaction of the 66 keV, 5/2^? state in the daughter isotope⁷³As with the electric field gradient in the noncubic arsenic lattice was observed at room temperature by means of theγ-γ perturbed angular correlation technique. The measured angular correlation pattern is characterized by a quadrupole coupling constantv _Q =51.6 (1.3) MHz. By use of the known electric field gradient on regular lattice sites, a value of ¦Q¦=0.356(12)b is derived for the quadrupole moment of the 66 keV, 5/2^? state of⁷³As.     

Magnetic moment and lifetime of the 738 keV 7/2− state in43K

The TDPAD technique was used to measure the magnetic moment of the 738 keV 7/2^? state in⁴³K excited via the reaction⁴He(⁴⁰Ar,p) and the 190 MeV pulsed⁴⁰Ar beam of VICKSI; the value found is g=1.266 ±0.015. The mean life of the state, Τ=292±5^ns, was determined from pulsed Ge(Li) spectra. The application of this hyperfine probe and deorientation effects during recoil in the target gas and in vacuo are discussed.     

Magnetic dipole moment and keV neutrino dark matter

We study magnetic dipole moments of right-handed neutrinos in a keV neutrino dark matter model. This model is a simple extension of the standard model with only right-handed neutrinos and a pair of charged particles added. One of the right-handed neutrinos is the candidate of dark matter with a keV mass. Some bounds on the dark matter magnetic dipole moment and model parameters are obtained from cosmological observations.     

Magnetic moment measurement of the 129.2 keV level in153Gd

The magnetic moment = (0.37±0.07)_N of the 129.2 keV level in¹⁵³Gd was determined from measurements of the integral perturbed angular correlation (IPAC) in an external magnetic field.     

Magnetic moment measurement of 108 keV level in151Gd

The magnetic momentμ=?(1.23±0.17)μ _N of the first excited state in¹⁵¹Gd was determined by integral perturbed angular correlation (IPAC) in external magnetic field.     

Magnetic moment and change of the mean square charge radius of the 83.4 keV rotational state in153Eu

From Mössbauer effect measurements the magnetic momentμ=(+1.80±0.08) nm of the 83.4 keV rotational state of¹⁵³Eu and the ratio of the changes of the mean square charge radiiΔ〈r ²〉 (¹⁵³Eu, 83 keV)/Δ〈r ²〉 (¹⁵³Eu, 103 keV)=+0.025±0.008 were determined. The results are interpreted on the basis of mixing of rotational bands by the Coriolis force.     

Magnetic moment of the 2543 keV 7+ state in 40K

The nuclear g-factor of the 2543 keV, 7⁺ state ⁴⁰K has been measured as g = 0.59 ± 0.10. Time-integral perturbed angular distributions were measured in an external magnetic field and, after implantation, in the hyperfine field at potassium in nickel. The experimental value is discussed within the $\text{f}{}_{\mathrm{<mtext>7</mtext><mtext>2</mtext>}}{}^2\text{and}\text{d}{}_{\mathrm{<mtext>3</mtext><mtext>2</mtext>}}{}^{\mathrm{?2}}\text{f}{}_{\mathrm{<mtext>7</mtext><mtext>2</mtext>}}{}^2$, configurations.     

The magnetic dipole moment of the 91 keV state of147Pm

The magnetic dipole interaction of the 91 keV state of¹⁴⁷Pm in an environment of metallic neodymium has been investigated by a time-differential perturbed angular correlation (TDPAC) experiment. The measurement was performed in an external magnetic field of 2.94 (3) T at room temperature. From the Larmor precession frequency the magnetic dipole moment of the 91 keV state is derived as =+3.22(16) _K. The enhancement of the external magnetic field by the paramagnetic 4f shell determines the ionicity of the Pm ion as Pm³⁺ in metallic and as Pm⁴⁺ in non-metallic sources.     

Nuclear moment of the 23.8 keV state and hyperfine anomaly in119Sn

Using the Mössbauer effect of the 23.8 keV transition in¹¹⁹Sn, the nuclear magnetic dipole moment of the 23.8 keV 3/2⁺ state is measured to be 0.632(3)μ _n . From a comparison with previously published results a hyperfine anomaly of ?8.8(5)% is obtained.     

The magnetic dipole moment of the 150 keV state of177Lu

The magnetic dipole interaction of the 150 keV state of¹⁷⁷Lu in an environment of metallic ytterbium has been investigated by time-differential perturbed angular correlation experiments. The measurements were performed in an external magnetic field of 0.4 T at room temperature. Two independent measurements at different - cascades give the same Larmor precession frequency. From the weighted average the magnetic dipole moment of the 150 keV state is derived as =+5.5(3) _K. From the angular correlation coefficient A₂₂=–0.042(7) of the (139–150) keV - cascade the mixing ratio =+0.21(4) is deduced. The coefficient A₂₂=+0.015(7) of the (1080–150) keV - cascade yields the mixing ratio =+0.08(4).     

Magnetic moment of the 96.7 keV 9/2+ level in79Rb

Theg-factor of the 9/2⁺ 96.7 keV excited state with a half-lifeT _1/2=18.6(5) ns in⁷⁹Rb populated in the⁷⁹Br(³He, 3n) reaction has been measured by the TDPAD method. The experimentalg-factorg _exp=+1.117(16) has been analysed in the frame of particle-rotor models and gave evidence for a large deformation of this state.     

Magnetic moment measurement of the 15/2+, 3578 keV level in67Ga

The magnetic moment μ=−(1.69±0.47) μ_N of the 15/2⁺, 3578 KeV level in⁶⁷Ga was determined from measurements of the integral perturbed angular distributions in implanted sources. The excited levels were populated by the reaction⁵⁶Fe(¹⁶O, αp)⁶⁷Ga.     

Magnetic moment and electric quadrupole moment of the anomalous186Ir ground state

The ground state nuclear moments of¹⁸⁶Ir (j ^π=5⁽⁺⁾) have been determined with NMR on oriented¹⁸⁶Ir in Ni as |μ|=3.80 _?0.02 ^+0.12 μ _n andQ=?3.00 (15)b. The quadrupole moment is consistent with an anamolousj ^π K=5⁺0 or 5⁺1 ground state configuration. The explanation of the magnetic moment in terms of pure 5⁺0 or 5⁺1 configurations would require a high collectiveg _R-factor ofg _R≧0.76. On the other hand the magnetic moment can be explained with a “normal”g _R and a mixed ground state configuration.     

The quadrupole moment of the 535 keV state of 133La

The quadrupole moment of the 535 keV $\text{3}\text{2}{}^{\mathrm{?}}$ state of ¹³³La has been derived from a time-differential perturbed angular correlation measurement in an environment of La metal. The effective electric gradient is known from a nuclear quadrupole resonance measurement with the ground state of ¹³⁹La. The result Q = 0.35 ± 0.03 b does not confirm a proposed shape isomerism.     

Magnetic moment of the 188 kev excited state in125I

Theg-factor of the 188 keV 3/2⁺ state in¹²⁵I has been determined with the perturbed angular correlation method to be g=0.70 (5). This result is close to the value reported earlier for the corresponding level in¹²⁵I.     

Magnetic moment of a two-particle bound state in quantum electrodynamics

A quasipotential method for calculating relativistic and radiative corrections to the magnetic moment of a two-particle bound state is formulated for particles of arbitrary spin. It is shown that the expression for the g factors of bound particles involve O(α ²) terms depending on the particle spin. Numerical values are obtained for the g factors of the electron in the hydrogen atom and in deuterium.     

Magnetic moment of the 3/2 + state in 165Ho

The Larmor precession for the 362 keV state in ¹⁶⁵Ho(I ^π ?=?3/2^?+?, T _1/2?=?1.512 μs) in Dy₂O₃ with an external magnetic field of 0.3 T was determined to be ??32.3 ± 0.6 MHz by use of the perturbed angular correlation technique, intending to determine the magnetic moment and apply it to the measurement of the hyperfine field at Ho in Fe. The magnetic moment for this state was tentatively deduced under the assumption that the paramagnetic correction factor for a free Ho^3?+? ion is applicable to the present case. The independent A ₂₂ measurement for the 633???362 keV γ cascade for the sign assignment of the Larmor frequency is inconsistent with that from known multipolarities and mixing ratios for this cascade, implying that the mixing ratios may be different from the reported values.