scispace - formally typeset
Search or ask a question
Author

Mieczysław Foryś

Bio: Mieczysław Foryś is an academic researcher. The author has contributed to research in topics: Electron capture & Radiolysis. The author has an hindex of 5, co-authored 7 publications receiving 99 citations.

Papers
More filters
Journal ArticleDOI
TL;DR: In this paper, the electron capture reaction in the gamma radiolysis of gaseous hydrogen sulphide has been investigated with methyl bromide and hydrogen chloride as the electron scavengers.
Abstract: The mechanism of the electron capture reactions in the gamma radiolysis of gaseous hydrogen sulphide has been investigated with methyl bromide and hydrogen chloride as the electron scavengers. The yields of methane and hydrogen were measured gas-chromatographically. The measurements were performed at two dose rates and in the presence of butadiene as a sulphur scavenger. G(CH4)-1 and ΔG(H2)−1 are a linear function of l/[CH3Br] and 1/[HC1], respectively, and do not depend on the H2S pressure. Lowering the steady-state concentration of product sulphur by approximately 10 times (using a lower dose rate or butadiene) increases the rate of CH4 or H2 production by only approximately 2 times. A mechanism including formation of dimer negative ions of the type (H2S X)−, where X is H2S, SNn, HCl or CH3Br, is proposed

49 citations

Journal ArticleDOI
TL;DR: In this article, an apparatus for investigation of kinetics of a thermal electron capture process and its temperature dependence with pulsed Townsend technique has been built, which gives straightforward results on electron drift velocities in any mixture and allows calculating the rate constants for electron capture as well as activation energies of this process.

18 citations

Journal ArticleDOI
TL;DR: In this article, an electron swarm method for investigation of the electron capture reaction has been modified based on the registration of the temporal evolution of a single electron pulse, which gives straightforward results on electron drift velocities in any mixture and allows calculating the rate constants for the electron Capture.

11 citations

Journal ArticleDOI
TL;DR: In this article, the Pulsed Townsend technique was used to measure the thermal electron attachment rate for CH 2 ClCHClCH 2 Cl, CH 2 CLCHClCh 2 Cl and CF 2 ClCFCl 2 over the temperature range T ǫ =298-358 K. The corresponding rate coefficients at 298-K are equal to 1.7(4) −1 −10 −10, 7.9(15) −10, 3.4(5) −8 Â cm 3 Âmolec.

10 citations

Journal ArticleDOI
TL;DR: In this paper, the γ-radiolysis of hydrogen sulphide in the excess of xenon was studied as a function of added HBr, N2O, CCl4 and SF6.
Abstract: The γ-radiolysis of hydrogen sulphide in the excess of xenon : as studied as a function of added HBr, N2O, CCl4 and SF6. Addition of HBr results in the considerable increase of H2 yield while addition of excess of N2O, CGl4 and SF6 reduces G(H 2 ) to almost zero. When N2O is present, the N2 yield also varies with the H2S/N2O ratio, being uninfluenced by the addition of small amounts of SF6 Consideration of possible ionic and nonionic reactions leads to the conclusion that hot hydrogen atoms play a major role in the formation both of hydrogen and nitrogen. The mechanism of electron attachment and ion recombination processes is proposed which is consistent with all the obtained data.

8 citations


Cited by
More filters
Journal ArticleDOI
TL;DR: In this article, the kinematic equations giving the velocity and acceleration of a ball in a vial in a planetary ball mill are given, the kinetic energy transferred at the collision event, the shock frequency, and the injected shock power are also calculated.
Abstract: Based on a kinematic modeling of the planetary ball mill, the kinematic equations giving the velocity and the acceleration of a ball in a vial in a planetary ball mill are given. The kinetic energy transferred at the collision event, the shock frequency, and the injected shock power are also calculated. The confrontation of the calculated to some experimental results documented in the material literature, show that neither the shock energy nor the shock frequency separately taken into account, govern the end product but only the injected shock power is responsible for the ball milled end product.

258 citations

Journal ArticleDOI
TL;DR: In this article, the effects of thermal treatment and neutron irradiation on precipitates in Zircaloy have been investigated by analytical electron microscopy, and the process leading to amorphization is discussed based on the effect of irradiation-induced point defects.

120 citations

Journal ArticleDOI
TL;DR: Based on a deeper mathematical treatment of the process taking place in a planetary ball mill and experimental results concerning the ball-milled end product of the Ni 10 Zr 7 compound, Wang et al. as discussed by the authors proved that neither the shock frequency nor the shock energy separately governs the ball milled end products as assumed previously.

115 citations

Book ChapterDOI
TL;DR: In this paper, the basic physics of dissociative electron attachment (DEA) processes are surveyed and the progress that has been made during past 14 years since the last important review on DEA is discussed.
Abstract: Dissociative electron attachment (DEA) processes occur in many important applied contexts, particularly gas discharges, plasmas, biological systems, and astrophysical environments. In this review, we survey the basic physics of DEA and the progress that has been made during past 14 years since the last important review on DEA (Hotop et al., Adv. At. Mol. Opt. Phys. 49, 86). This progress includes studies of DEA to simple diatomic and polyatomic molecules with high energy resolution revealing vibrational Feshbach resonances and threshold structures, studies of angular distribution of the fragmentation products allowing analysis of the symmetries of the resonances involved, and theoretical developments in investigating the dynamics of nuclear motion in DEA processes. Particular attention is paid to recent advances in DEA to biological molecules as the process is important for understanding radiation damage. Recent progress in understanding electron attachment to van der Waals clusters and the influence of cluster environments on DEA is also reviewed. The review concludes with a forward look and suggestions for new research directions.

113 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the field of irradiation-induced amorphization of intermetallic compounds is presented, including an update of recent experimental results using in-situ particle irradiation showing the effects of dose rate, temperature, crystal orientation, electron energy and the presence of stacking faults.

107 citations