[en] Using a non-R-matrix model approach to alpha decay for α-active island around A = 110 the experimental branching ratios are analysed. (author)

[en] By means of the on-line mass separator at Gesellschaft fuer Schwerionenforschung, Darmstadt, we produced ¹¹⁴Ba through the ⁵⁸Ni(⁵⁸Ni,2n) reaction, separated it as a ¹¹⁴Ba¹⁹F⁺ beam, and implanted it into a stopper foil positioned in the center of an array of track detectors, which were used to search for ¹²C radioactivity of ¹¹⁴Ba. A total number of (5.4±1.7).10⁴¹¹⁴Ba atoms were implanted. No ¹²C event was found after a total exposure time of 116 hours, corresponding to a ⁵⁸Ni beam dose of 1.3.10¹⁷. The resulting upper limit of 3.4.10^-5 (84% c. 1.) for the branching ratio for ¹²C decay of ¹¹⁴Ba is considerably lower than the limits obtained in previous experiments, which represents an inconsistency at levels of more than 90%. A semiempirical estimate of 19.3 MeV for the upper limit of the Q-value for ¹²C decay of ¹¹⁴Ba is derived. (orig.)

[en] By means of the on-line mass separator at Gesellschaft fuer Schwerionenforschung, Darmstadt, we produced ¹¹⁴Ba through the ⁵¹Ni(⁵⁸Ni,2n) reaction, separated it as a ¹¹⁴Ba¹⁹F⁺ beam, and implanted it into a stopper foil positioned in the center of an array of track detectors, which were used to search for ¹²C radioactivity of ¹¹⁴Ba. A total number of (5.4±1.7)x10⁴¹¹⁴Ba atoms were implanted. No ¹²C event was found after a total exposure time of 116 h, corresponding to a ⁵⁸Ni beam dose of 1.3x10¹⁷. The resulting upper limit of 3.4x10^-5 (84% C.L.) for the branching ratio for ¹²C decay of ¹¹⁴Ba is considerably lower than the limits obtained in previous experiments, which represents an inconsistency at levels of more than 90%. A semiempirical estimate of 19.3 MeV for the upper limit of the Q value for ¹²C decay of ¹¹⁴Ba is derived. copyright 1997 The American Physical Society

[en] We measured for the first time the αdecay of ¹¹⁴Ba. The results are discussed in comparison with theoretical predictions. (author)

[en] Based on the cold valley description of cold fission and fusion we investigate the cluster radioactivity phenomenon for the N = Z nucleus ¹¹⁴Ba, in the region of actinide nuclei and for some newly discovered superheavy nuclei. Using ground-state deformations of fragments as predicted by the macroscopic-microscopic model and taking the optimal orientation at scission, the pole-pole one, we obtain minima in the driving potential which are confirming the observed clusterization for mother nuclei with Z between 88 and 94 in majority of cases. Based on this we predict new cases of clusterization for nuclei up to Z = 100. (letter to the editor)

[en] The present work aims to study the possibility of clustering in heavy nuclei by computing the cluster formation probability for the entire experimentally observed cluster decays from carbon to silicon taking the Coulomb and proximity potential as interacting barrier for the post-session region and simple power law interpolation for overlap region

[en] The experimental techniques used at the GSI on-line mass separator for decay studies of nuclei far from stability are described. Particular emphasis is put on recent developments made for investigating nuclei near ¹⁰⁰Sn. The methods applied for identifying and studying the new isotopes ⁹⁴Ag, ¹⁰⁰In, ¹⁰¹Sn and ¹¹⁴Ba are used as examples. (orig.)

[en] In this paper, the influence of the compound nucleus N/Z ratio on the properties of carbon isotopes emitted in the decay of ^114,116,118Ba nuclei formed in low energy heavy-ion reactions ^74,76,78Kr + ⁴⁰Ca, have been investigated

[en] Several years ago, we developed at Berkeley a novel glass track-etch detector which exhibited unprecedented resolution in measurements of charge and velocity of relativistic heavy ions. Since its development, we have exploited BP-1 detectors in a variety of fields, including nuclear physics, astrophysics, and even atomic physics experiments. Finally, we are planning to deploy ECCO, a giant array of BP-1 detectors in space, to measure for the first time the age of galactic cosmic ray nuclei using the actinides (Th, U, Pu, Cm) as clocks. (author)

[en] The half life time and other characteristics for the emission of clusters like ⁸Be, ¹⁶O, ²⁰Ne, ²⁴Mg, ²⁸Si and ³²S have been computed within the Coulomb and proximity potential model and the predicted half life time values have been compared with other models. It is found that ⁸Be emission from ¹¹²Ba is most favourable for measurements with the lowest half life time value [log₁₀(T_1/2) = 7.23S]. Geiger-Nuttal (GN) plots for all clusters have been studied and are found to be linear. It is found that the inclusion of proximity potential will not produce any deviation from the linear nature of GN plots. The nuclear structure and shell effects are evident from the observed variation in slope and intercept of GN plots. (author)