Beta-decay branching ratios of Ga have been measured at the IGISOL facility of the Accelerator Laboratory of the University of Jyväskylä. Ga is one of the heavier Tz = 0, 0 → 0 β-emitting nuclides used to determine the vector coupling constant of the weak interaction and the Vud quark-mixing matrix element. For part of the experimental studies presented here, the JYFLTRAP facility has been empl...

This review focuses on the growth of high-quality (Li1−xFex)OHFeSe single crystals by a hydrothermal method using floating-zone-grown AxFe2−ySe2 (A = K, Rb, and Cs) as precursors. The structure, superconductivity, and magnetic behavior of the obtained crystals are highly influenced by the growth conditions, such as time, temperature, and composition. A phase diagram with temperature against the...

Precise estimation of propagation parameters in precipitation media is of interest to improve the performance of communications systems and in remote sensing applications. In this paper, we present maximum-likelihood estimators of specific attenuation and specific differential phase in rain. The model used for obtaining the cited estimators assumes coherent propagation, reflection symmetry of t...

In some recent papers, we studied pure SU(4) gauge theory with the Wilson action on a hypercubical lattice in four space t ime dimensions and found a firstorder phase transition at/3 = 10.2 [1 ], that this phase transition was not deconfining [2] and measured the asymptotic freedom scale parameter A 0 [2]. In the present paper, we wish to apply a renormalizationgroup scheme [3] for comparing th...

We consider the evolution of the phase transition from the parent hexagonal phase P63/mmc to the orthorhombic phase Pmcn that occurs in several compounds of A′A′′BX4 family as a function of the hcp lattice parameter c/a. For compounds of K2SO4 type with c/a larger than the threshold value 1.26 the direct first-order transition Pmcn−P63/mmc is characterized by the large entropy jump ∼ R ln 2. Fo...

Using videomicroscopy data of a two-dimensional colloidal system the bond-order correlation function G{6} is calculated and used to determine both the orientational correlation length xi{6} in the liquid phase and the modulus of orientational stiffness, Frank's constant F{A}, in the hexatic phase. The latter is an anisotropic fluid phase between the crystalline and the isotropic liquid phase. F...

Within the quasiparticle random-phase approximation (QRPA) we achieve partial restoration of the isospin symmetry and hence fulfillment of the requirement that the 2νββ Fermi matrix element M F vanishes, as it should, unlike in the previous version of the method. This is accomplished by separating the renormalization parameter gpp of the particle-particle proton-neutron interaction into isovect...

A generic CPM scheme can be decomposed into a continuous-phase encoder (CPE) and a memoryless modulator (MM). The CPE can be combined with a channel encoder (CE). This creates an extended CE, as the CPE is now an extension of the CE. In this paper, a 1⁄2 rate quaternary CE is combined with a quaternary CPE. The CE used here is a convolutional encoder, thus, the extended CE is also a convolution...

This paper presents performance of two level turbo coded 4-ary continuous phase frequency shift keying. In this system,, to provide phase continuity of the transmitted signals, turbo encoder and continuous phase encoder (CPE) are serially concatenated at the second level, while first level consist of only a turbo encoder. Simulation results are drawn for proposed system over AWGN, Rician and Ra...

This paper develops a differential encoder for differentially demodulated continuous phase frequency shift keying (CPFSK). CPFSK schemes with modulation index , where and are relatively prime positive integers, can be represented by a decomposed model consisting of a continuous phase encoder (CPE) and a memoryless modulator (MM). The differential encoder is shown to fit well with the CPE and fo...