[en] Contrary to theoretical predictions and previous experimental results, a new systematic study of the static quadrupole moments Qsub(2+) in the even-mass cadmium isotopes using the re-orientation effect shows no evidence of significant variation in Qsub(2+) with mass number. Assuming positive interference from higher 2⁺ levels, it is found: Qsub(2+)(¹⁰⁶Cd) = 0.32 +- 0.08, Qsub(2+)(¹¹⁰Cd) = -0.36 +- 0.08, Qsub(2+)(¹¹²Cd) = -0.42 +- 0.08, Qsub(2+)(¹¹⁴Cd) = -0.38 +- 0.08, Qsub(2+)(¹¹⁶Cd) -0.42 +- 0.08 eb. For ¹¹⁶Cd, B(E2: 0⁺→2⁺) 0.532 +- 0.004 e²b², 20% lower than the previously adopted value. (author)

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[en] Experiment to seek double electron capture in ¹⁰⁶Cd decay took place in the Modane underground laboratory (4800 m depth). By means of the TGV-2 low-background multidetector spectrometer one investigated into thin (∼ 50 μm thickness) specimens of enriched ¹⁰⁶Cd and of natural Cd. On the basis of the preliminary processing of data acquired in 3400 hour course of efforts to measure 10 g of enriched ¹⁰⁶Cd (75% enrichment) one determined new limits (90% confidence limit) for various branches of ¹⁰⁶Cd decay into ground (0⁺) and first excited state (2⁺, 512 keV) of a daughter nucleus. They constitute T_1/2(2νβ⁺EC) ≥ 4.1 x 10¹⁹ g and T_1//2(2νEC/EC) ≥ 5.6 x 10¹⁹ g (for 0⁺ → 0⁺, g.s. transitions) and T_1/2(2νβ⁺EC) → 5.8 x 10¹⁹ g and T_1/2(2νEC/EC) ≥ 2.1 x 10¹⁹ g

[en] The level lifetimes have been measured for a shears band of ¹⁰⁸Cd that exhibits band crossing. The observed level energies and B(M1) rates have been successfully described by a semiclassical geometric model based on shear mechanism. In this geometric model, the band crossing in the shears band has been described as the reopening of the angle between the blades of a shear.

[en] The spectrum obtained with a coindicence-and-addition gamma-ray spectrometer is free of background, photopeaks, Compton distributions and fortuitous addition peaks, and it is possible to distinguish the addition peaks corresponding to levels. Some new gamma rays observed in the decay of sup(110m)Ag by usual γ-ray spectroscopy are reported

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[en] The recently measured lower limit on the transition quadrupole moment Q_t of a strongly deformed band in ¹⁰⁸Cd is compatible with the value suggested by a simple analytic formula deduced from a binary cluster model. This model indicates that such large deformations should be widespread in the A∼110 region

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