Positronium-ion decay

We present a precise theoretical prediction for the decay width of the bound state of two electrons and a positron (a negative positronium ion), Gamma(Ps^-) = 2.087 085(12)/ns. We include O(alpha^2) effects of hard virtual photons as well as soft corrections to the wave function and the decay amplitude. An outcome of a large-scale variational calculation, this is the first result for second-order corrections to a decay of a three-particle bound state. It will be tested experimentally in the new positronium-ion facility in Garching in Germany.Comment: 6 page

Recursion relations for Hylleraas three-electron integral

Recursion relations for Hylleraas three-electron integral are obtained in a closed form by using integration by parts identities. Numerically fast and well stable algorithm for the calculation of the integral with high powers of inter-electronic coordinates is presented.Comment: 12 pages, requires RevTeX4, submitted to Phys. Rev.

Dispersive diffusion controlled distance dependent recombination in amorphous semiconductors

The photoluminescence in amorphous semiconductors decays according to power law $t^{-delta}$ at long times. The photoluminescence is controlled by dispersive transport of electrons. The latter is usually characterized by the power $alpha$ of the transient current observed in the time-of-flight experiments. Geminate recombination occurs by radiative tunneling which has a distance dependence. In this paper, we formulate ways to calculate reaction rates and survival probabilities in the case carriers execute dispersive diffusion with long-range reactivity. The method is applied to obtain tunneling recombination rates under dispersive diffusion. The theoretical condition of observing the relation $delta = alpha/2 + 1$ is obtained and theoretical recombination rates are compared to the kinetics of observed photoluminescence decay in the whole time range measured.Comment: To appear in Journal of Chemical Physic

Relativistic, QED, and nuclear mass effects in the magnetic shielding of 3^3He

The magnetic shielding $\sigma$ of $^3$He is studied. The complete relativistic corrections of order $O(\alpha^2)$, leading QED corrections of order $O(\alpha^3 \ln\alpha)$, and finite nuclear mass effects of order $O(m/m_{\rm N})$ are calculated with high numerical precision. The resulting theoretical predictions for $\sigma = 59.967~43(10)\cdot 10^{-6}$ are the most accurate to date among all elements and support the use of $^3$He as a NMR standard.Comment: 10 pages, corrected minor errors in Eqs.(6,7

Metal ion influences distortion of the ligand in the structure of [M{2−MeO(O)CC6H4NHC(S)NP(S)(OiPr)2}2](M=ZnII,CdII)[M\{2-MeO(O)CC_6H_4NHC(S)NP(S)(OiPr)_2\}_2] (M = Zn^{II}, Cd^{II}) complexes : a driving force for intermolecular aggregation

Reaction of the in situ deprotonated N-thiophosphorylated thiourea $2-MeO(O)CC_6H_4NHC(S)NHP(S)(OiPr)_2 (HL)$ with $MCl_2 (M = Zn^{II}, Cd^{II})$ in aqueous ethanol leads to complexes of the formula $[ML_2]$. Both compounds crystallise in the triclinic space group P[1 with combining macron] with Z = 2 and the metal cations are found in a tetrahedral S_2S′_2 coordination environment formed by the C–S and P–S sulfur atoms. The crystal structures reveal intramolecular N–H⋯O[double bond, length as m-dash]C hydrogen bonds formed within the $2-MeO(O)CC_6H_4NH$ fragments. Both structures are further stabilised by intermolecular π⋯π stacking interactions, which are more efficient in $[CdL_2]$. Here, a pronounced dimeric intermolecular aggregate is observed which goes along with a pronounced distortion of the chelate [(S)CNP(S)]− backbone of the ligand upon coordination to $Cd^{II}$ as well as a significantly distorted coordination tetrahedron $CdS_2S′_2$. The aggregation is also reflected in the positive electrospray ionisation (ESI) mass spectrum of the CdII complex, which exhibits peaks for the dimeric cations $[Cd_2L_3]+$, $[Cd_2L_4 + H]+$ and $[Cd_2L_4 + Na]+$, while for the ZnII analogue only monomeric species were observed. Quantum chemical ETS-NOCV (ADF) calculations confirm the higher stability of dimers in $[CdL_2]$ compared with $[ZnL_2]$. The π⋯π stacking interactions are prodominantly due to dispersion contributions, though the electrostatic and orbital interaction components are also important. QTAIM (ADF) type calculations additionally quantify the covalent and non-covalent interactions in the momomers

VIBROTHERMOGRAPHY FOR IMPACT DAMAGE DETECTION IN COMPOSITES STRUCTURES

The paper investigates modelling aspects related to application of vibrothermography for detection of barely visible impact damage in composite structures. Low-velocity impact tests were performed to introduce multiple delaminations into carbon/epoxy composite plate. Damage severity was revealed using well-established non-destructive evaluation techniques. Vibrothermography was used subsequently to show good agreement with classical damage detection techniques. Following these experimental investigations, numerical simulations were performed to assess feasibility and sensitivity of vibrothermography for impact damage detection. Numerical results were validated using experimental data showing very good qualitative and encouraging quantitative agreement. The study demonstrates that virtual impact damage detection using vibrothermography can be performed as part of structural design to assess sensitivity of the method in real engineering applications. Copyright © 2012 John Wiley & Sons, Ltd

Brane universes tested by supernovae

We discuss observational constrains coming from supernovae Ia \cite{Perlmutter99} imposed on the behaviour of the Randall-Sundrum models. In the case of dust matter on the brane, the difference between the best-fit general relativistic model with a $\Lambda$-term \cite{Perlmutter99} and the best-fit brane models becomes detectable for redshifts $z > 0.6$. It is interesting that brane models predict brighter galaxies for such redshifts which is in agreement with the measurement of the $z = 1.7$ supernova \cite{Riess01} and with the New Data from the High Z Supernovae Search Team \cite{schmit02}. We also demonstrate that the fit to supernovae data can also be obtained, if we admit the "super-negative" dark energy $p = - (4/3) \varrho$ on the brane, where the dark energy in a way mimics the influence of the cosmological constant. It also appears that the dark energy enlarges the age of the universe which is demanded in cosmology. Finally, we propose to check for dark radiation and brane tension by the application of the angular diameter of galaxies minimum value test.Comment: 4 pages, 5 figures, REVTEX4, amended versio

Wczesne schematy nieadaptacyjne jako predyktory inteligencji emocjonalnej osób dorosłych

The aim of the research was an attempt to capture the influence of Early Maladaptive Schemas and it’s connection to Emotional Intelligence in the population of adults between age 18 and 54. After some hypotheses were made, it became clear that they all go down to making the Early Maladaptive Schemas as a really impactful tool in the process of emerging and shaping emotional intelligence. This also draws our attention to how important this might be and how having multiple and intense Early Maladaptive Schemas (EMS) can impact the way we perceive the world around us and how do we look at ourselves. During the research process of this study the data was collected by electronic devices. 102 people took part in the research (68 females and 34 males). To measure occurrence, intensification and quantity of maladaptive schemas areas The Young Schema Questionnaire YSQ-S3-PL, second version in Polish translation by Justyna Oettingen, Jan Chodkiewicz, Dorota Mącik and Ewa Gruszczyńska (2018) was used. In order to take possession of Emotional Intelligence data, Emotional Intelligence Questionnaire in Polish adaptation by Anna Ciechanowicz, Aleksandra Jaworowska, Anna Matczak (2000) played a major role. After gathering and analyzing data conclusion was made that in deed Early Maladaptive Schemas have a moderate negative connection with Emotional Intelligence. Results suggest that high EMS values comes with low EI levels. The more and intense EMS get, the less a person can manage their own emotions in positive ways to effectively reduce stress and use EI to improve thinking and functioning to overcome challenges. However there is no indication of statistically significant correlations between high levels of EMS and the emotional recognition abilities