[en] The surface densities of evaporated dysprosium layers were calibrated in terms of their optical densities. The rate of oxidation of such layers in air was found to be proportional to the square root of the time elapsed since production. (orig.)

No abstract available

[en] Low spin S-band members are established in ^160,162Dy. The coupling between the S-band and the ground state band is significant in ¹⁶⁰Dy, but unnoticed in the ¹⁶²Dy isotope

[en] The Spin Spectrometer was used to separate Dy ground-band and two-quasiparticle populations in one- and two-neutron transfer reactions with Sn and Ni projectiles. Transfer probabilities P_1n,2n and two-neutron enhancement factors F==P_2n/P_1n² were determined as a function of scattering angle. For the two-quasiparticle bands F congruent 7--20, but for the ground band F congruent 30--500, indicating large pairing effects in two-particle transfer to the ground band. The data also indicate larger enhancement factors in Sn than in Ni collisions

[en] We present a model of one-neutron transfer reactions appropriate for cases in which one of the collision partners is deformed. The model considers rotational excitation due to the Coulomb field in the entrance channel, neutron transfer between the two nuclear surfaces at the distance of closest approach, and additional rotational excitation in the final channel. The Coulomb excitation processes are described within the sudden-limit approximation using classical-limit theory, and the transfer is described in terms of spectroscopic amplitudes obtained with the particle-rotor model. We have applied this model of transfer to the ⁵⁸Ni+¹⁶¹Dy and ¹¹⁶Sn+¹⁶¹Dy one-neutron pickup reactions, cases for which data are available. The calculations indicate that transfer into both ground and two-quasiparticle excited bands takes place and that the distribution of population in the ground band and two-quasiparticle states is in reasonable agreement with the data

[en] The level structure below 2 MeV in ¹⁶²Dy has been investigated using the ¹⁶¹Dy(n,γ)¹⁶²Dy and ¹⁶¹Dy(n,e^-)¹⁶²Dy reactions. The results for the positive parity excitations are discussed within the framework of an Interacting Boson Approximation (IBA-2) calculation. 7 refs., 1 fig., 1 tab

[en] Transfer reactions have been studied for some time with light heavy ions such as oxygen. Although states of spin I approx.10 h are sometimes populated in such reactions, it is assumed that collective excitation is small, and the transferred particles are responsible for the angular momentum transfer. In this paper we will discuss a qualitatively different kind of transfer reaction using very heavy ions (A greater than or equal to 40). In these reactions the collective excitation in both the entrance and exit channels is strong, and there may be appreciable angular momentum transfer associated with inelastic excitation. 12 refs., 13 figs

[en] States in ¹⁶¹Dy have been populated using the inelastic (τ,τ') reaction. Strong particle groups in the 0.9 MeV excitation region are interpreted to arise from a coupling of an odd particle in the [642]5/2⁺ Nilsson orbital to a γ-vibration of the even core. The 1/2⁺ and 3/2⁺ members of the antialigned particle-vibration sequence are found to interact with states from the N=4 and N=6 oscillator shell, thus modifying previous conclusions on the ΔN=2 coupling. The particle-vibration states are discussed within a particle-core model

[en] Aligned two-quasiparticle bands in ¹⁵⁶Ho and ¹⁶⁰Dy have been discussed. In ¹⁵⁶Ho a strongly decoupled system apparently belonging to the [hsub(11/2)]sub(p)x[isub(13/2)]sub(n) configuration has been located with the ¹⁴⁶Nd(¹⁴N, 4n) reaction. Previously, four levels at 1607, 1723, 1974 and 2577 keV in ¹⁶⁰Dy were populated strongly in the (³He,α) reaction and were assigned as possible members of a superband. These levels are discussed, and a comparison of the aligned bands in the odd-odd and even-even systems is performed. (Auth.)

[en] The atomic nucleus is a many-body fermionic system, shows many nuclear phenomena due to single particle motion and/or collective motion of nucleons in the nucleus. The aim of the present measurement is to study of the rotational enhancement of the nuclear level density (NLD) in ¹⁶¹Dy and its fade out with E_X. The statistical model analysis of the measured neutron spectra from ¹⁶²Dy, populates through the breakup-fusion reaction of ⁷Li with ¹⁵⁹Tb target as measured in case of ²⁰⁸Pb, will reveal the fade out of rotational enhancement with E_X