Alpha-gamma decay studies of $$^{247}$$ Md

The European Physical Journal A - The goal of the present paper is twofold. First, a novel expansion many-body method applicable to superfluid open-shell nuclei, the so-called Bogoliubov in-medium...     

Plasma confinement and skin currents in a small tokamak with turbulent heating

Results on plasma confinement, heating, suprathermal radiation and overall conductivity together with the time development of radial current density profiles during current-driven turbulence in the toroidal device “TORTUR” are reported.     

An automated, sheathless capillary electrophoresis-mass spectrometry platform for discovery of biomarkers in human serum

A capillary electrophoresis-mass spectrometry (CE-MS) method has been developed to perform routine, automated analysis of low-molecular-weight peptides in human serum. The method incorporates transient isotachophoresis for in-line preconcentration and a sheathless electrospray interface. To evaluate the performance of the method and demonstrate the utility of the approach, an experiment was designed in which peptides were added to sera from individuals at each of two different concentrations, artificially creating two groups of samples. The CE-MS data from the serum samples were divided into separate training and test sets. A pattern-recognition/feature-selection algorithm based on support vector machines was used to select the mass-to-charge (m/z) values from the training set data that distinguished the two groups of samples from each other. The added peptides were identified correctly as the distinguishing features, and pattern recognition based on these peptides was used to assign each sample in the independent test set to its respective group. A twofold difference in peptide concentration could be detected with statistical significance (p-value < 0.0001). The accuracy of the assignment was 95%, demonstrating the utility of this technique for the discovery of patterns of biomarkers in serum.     

Prompt Neutrons from Spontaneous 254Rf Fission

Physics of Particles and Nuclei Letters - The neutron yield from the spontaneous fission of the short-lived neutron-deficient 254Rf nucleus produced in the complete fusion reaction with the beam of...     

Preliminary investigation of arc stabilization with a forced vortex

The stabilization of an arc using a forced vortex was studied experimentally. Measurements on the arc characteristics were made as a function of the stabilizing flow parameters. It was found that the behaviour of the arc may be understood in terms of measurements made on the stabilizing flow without the arc. It is concluded that stable arc operation may be achieved using forced vortex stabilization, but that in open-ended systems end effects on the vortex are likely to cause severe convective losses in the arc.     

Spontaneous fission of <Superscript>256</Superscript>Rf,new data

Spontaneous fission properties of the short-lived neutron-deficient ²⁵⁶Rf nucleus produced in the complete fusion reaction with a beam of multiply charged heavy ⁵⁰Ti ions from the U-400 cyclotron (FLNR, JINR) are experimentally investigated. Its half-life and decay branching ratio are measured. The average number of neutrons per spontaneous fission of ²⁵⁶Rf (\(\bar v = \;4.47 \pm \;0.09\)) is determined for the first time.     

Short-Lived Isotopes of Transfermium Elements: Studying Characteristics of Spontaneous Fissioning

series of experiments performed in 2014–2015 using the SHELS separator and a beam of multicharged ions from the U-400 accelerator at the Flerov Laboratory of Nuclear Reactions (Joint Institute for Nuclear Research) in Dubna is described. In preparation for a large program of experiments with a beam of highly charged ions of ⁵⁰Ti, an experiment is performed to study the spontaneous fissioning (SF) of short-lived neutron-deficient isotope ²⁵⁶Rf formed in complete fusion reaction⁵⁰Ti + ²⁰⁸Pb = ²⁵⁶Rf + 2n. The half-life of ²⁵⁶Rf is measured along with the probability of its SF decay. The average number of neutrons per one event of ²⁵⁶Rf SF (\(\bar v\)= 4.47 ± 0.09) is obtained for the first time. The results from experiments to study the SF of short-lived neutron-deficient isotopes synthesized in complete fusion reaction ⁴⁸Ca + ²⁰⁴Pb → ²⁵²No* are presented as well. Two short-lived activities attributed to the SF of the ground and isomeric states of ²⁵⁰No are revealed. The half-life, total kinetic energies of fission fragments, and neutron multiplicities are measured for the obtained short-lived nuclei. The average numbers of neutrons per one SF event are \(\bar v\)= 4.38 ± 0.13 and \(\bar v\)= 3.90 ± 0.20, respectively, for SF activity with t_1/2 = 5.1 ± 0.3 and t_1/2 = 36 ± 3 μs.     

Dynamic stabilisation of collisionnal drift waves in a R.F. Plasma

Dynamic stabilisation of collisional drift modes in a c.w. R.F. plasma was demostrated using a localised oscillating magnetic field.     

Experimental study of dynamic stabilization of dissipative drift modes by oscillating azimuthal magnetic field

The critical oscillating magnetic field for stabilization of collisional drift modes in a dc argon plasma at various static magnetic fields and neutral gas pressures was investigated and compared with theory.