Jean Kern

Magnetic properties of odd-odd deformed nuclei

Abstract Magnetic moments and Ml transition probabilities depend on the parameters g R , g Ω p , and g Ω n in odd-odd deformed nuclei. The parameter gR can be obtained from an intraband branching ratio and a magnetic moment. Available data are analyzed and compared with predictions of the unified model.

Study of the 176Lu(n, γ)177Lu reaction using a gamma band-filter spectrometer

Abstract The γ-ray spectrum from the 176Lu(n, γ)177Lu reaction has been investigated in the energy range 450 to 1420 keV using a newly developed gamma band-filter spectrometer. A total of 153 transitions have been observed. Improvements to the 177Lu scheme are suggested, and in particular the γ-decay of several levels of the 1 2 −[530↑] and 3 2 −[532↓] rotational bands is proposed. Special attention has been given to the Coriolis coupling between the two latter bands and the 1 2 −[541↓] band. Results on a complementary investigation of the 175Lu(n, γ)176Lu reaction are presented.

174Lu nuclear structure revisited

Abstract The data on the 176 Yb(p, 3nγ) 174 Lu reaction published by Bruder et al. have been further analyzed, by taking into account newer results from the 170 Er( 7 Li, 3nγ) 174 Lu reaction. The K π = 2 + {p 9 − 2 }[514−n] 5 − 2 [512] configuration was assigned to a new band having levels with energies close to those of the band proposed by Bruder et al. for which a new assignment is discussed. Three further new bands were disclosed. In addition we present a critical discussion on the measurement of the 174m Lu magnetic moment by Krane et al. Reevaluating their data we get a new value which nearly eliminates an anomaly in the g -factors previously evinced by Kern et al.

Gamma-ray diffraction properties of quartz and piezoelectricity

Abstract The effects on the diffraction properties of the (1 1 0) quartz planes induced by the application of a static and alternating electric fields have been experimentally investigated. Increases of reflectivity are observed. An outline of the interpretation is given.

Statistical properties of fusion reactions involving deformed nuclei

Abstract The statistical properties of the 165 Ho(α,2nγ) 167 Tm reaction were investigated. It was found that both the slopes of the excitation functions and the side-feeding intensities are independent of the K quantum number. Regular behaviour of these quantities as a function of the spin I and of the excitation energies of the observed levels provide a means for spin assignments, just as for spherical nuclei. The analysis, in the present case, however, is much more involved.

Intrinsic excitations in 192Ir

The structure of the odd‐odd 192Ir nucleus presents an interesting and challenging problem for both experimentalists and theorists. As a result of the common efforts of nine laboratories, it is possible, for the first time, to propose an extended scheme with 34 levels. The experiments included observation of γ‐ray transitions and of conversion electrons emitted after thermal and resonance neutron capture, of direct (d,p) and (d,t) neutron transfer reactions and of the angular distribution of γ‐rays from aligned 192Ir nuclei. The results are interpreted in the framework of the rotor‐plus‐particle and IBFFM models. The nuclear states appear to be strongly mixed. The complex and interesting ground‐state configuration is discussed.