The effect of helium sedimentation on galaxy cluster masses and
... Context. Recent theoretical studies predict that the inner regions of galaxy clusters may have an enhanced helium abundance due to sedimentation over the cluster lifetime. If sedimentation is not suppressed (e.g., by tangled magnetic fields), this may significantly affect the cluster mass estimates. ...
... Context. Recent theoretical studies predict that the inner regions of galaxy clusters may have an enhanced helium abundance due to sedimentation over the cluster lifetime. If sedimentation is not suppressed (e.g., by tangled magnetic fields), this may significantly affect the cluster mass estimates. ...
H.E.S.S. observations of the binary system PSR B1259
... The class of very high energy (VHE; E > 100 GeV) γ-ray binaries comprises only a handful of known objects in our Galaxy: LS 5039 (Aharonian et al. 2005a), LS I +61 303 (Albert et al. 2006), PSR B1259-63/LS 2883 (Aharonian et al. 2005b) and HESS J0632+057 (Aharonian et al. 2007), the first binary pri ...
... The class of very high energy (VHE; E > 100 GeV) γ-ray binaries comprises only a handful of known objects in our Galaxy: LS 5039 (Aharonian et al. 2005a), LS I +61 303 (Albert et al. 2006), PSR B1259-63/LS 2883 (Aharonian et al. 2005b) and HESS J0632+057 (Aharonian et al. 2007), the first binary pri ...
Chemistry Essentials For Dummies
... Greenville, South Carolina. After a stint in the United States Army, he decided to try his hand at teaching. In 1971, he joined the chemistry faculty of Stephen F. Austin State University in Nacogdoches, Texas where he still teaches chemistry. In 1985, he started back to school part time and in 1991 ...
... Greenville, South Carolina. After a stint in the United States Army, he decided to try his hand at teaching. In 1971, he joined the chemistry faculty of Stephen F. Austin State University in Nacogdoches, Texas where he still teaches chemistry. In 1985, he started back to school part time and in 1991 ...
Charge Transport in Organic Semiconductors
... where ∑µ is the sum of hole and electron mobilities and Ne-h is the density of generated electron-hole pairs. Ne-h is estimated by dividing the amount of energy density transferred to the material by the energy required to create one electron-hole pair; this ratio is further multiplied by a survival ...
... where ∑µ is the sum of hole and electron mobilities and Ne-h is the density of generated electron-hole pairs. Ne-h is estimated by dividing the amount of energy density transferred to the material by the energy required to create one electron-hole pair; this ratio is further multiplied by a survival ...
Studies of an inductively coupled negative hydrogen ion radio
... In the frame work of a development project for ITER neutral beam injection system a radio frequency (RF) driven negative hydrogen (H-/D-) ion source, (BATMAN ion source) is developed which is designed to produce several 10s of ampere of H-/D- beam current. This PhD work has been carried out to under ...
... In the frame work of a development project for ITER neutral beam injection system a radio frequency (RF) driven negative hydrogen (H-/D-) ion source, (BATMAN ion source) is developed which is designed to produce several 10s of ampere of H-/D- beam current. This PhD work has been carried out to under ...
Subject Area Standard Area Organizing Category Grade Level
... CHEM.A.2.2.2: Predict characteristics of an atom or an ion based on its location on the periodic table (e.g., number of valence electrons, potential types of bonds, reactivity). ...
... CHEM.A.2.2.2: Predict characteristics of an atom or an ion based on its location on the periodic table (e.g., number of valence electrons, potential types of bonds, reactivity). ...
Computational investigations of the electronic structure of molecular
... Why is UE22+ linear and UE2 (E = O, S, Se, Te) bent? ............................................. 202 Geometry of U(XR)22+ (X = N, P, As; R = H, CH3) ................................................. 204 Electronic structure - U(XR)22+ (X = N, P, As; R = H, CH3) .................................... ...
... Why is UE22+ linear and UE2 (E = O, S, Se, Te) bent? ............................................. 202 Geometry of U(XR)22+ (X = N, P, As; R = H, CH3) ................................................. 204 Electronic structure - U(XR)22+ (X = N, P, As; R = H, CH3) .................................... ...
6 Chemical Bonding – Orbital Theory
... Bond formation between atoms to give chemical compounds can be interpreted admirably in terms of the orbital theory of atomic structure. Heitler and London believed that electron cloud of the valence orbital on one atom ‘overlaps’ the electron cloud of the other bonding atom to form a covalent linka ...
... Bond formation between atoms to give chemical compounds can be interpreted admirably in terms of the orbital theory of atomic structure. Heitler and London believed that electron cloud of the valence orbital on one atom ‘overlaps’ the electron cloud of the other bonding atom to form a covalent linka ...
H dissociation due to collision with He Teck-Ghee Lee
... sections for an initial state with v0 = 12 and j0 = 10. The resonant cross sections have been multiplied by 10 in order to provide better visibility. There is a small decrease in the cross sections in going from m = 1 to 2 for n = 3. Further increase in m yields an even smaller change in the cross ...
... sections for an initial state with v0 = 12 and j0 = 10. The resonant cross sections have been multiplied by 10 in order to provide better visibility. There is a small decrease in the cross sections in going from m = 1 to 2 for n = 3. Further increase in m yields an even smaller change in the cross ...
Five Years of Swift Science: GRBs and More!
... EV Lac is young magnetically active isolated star. ...
... EV Lac is young magnetically active isolated star. ...
Photoelectron Spectroscopy of SO3 at 355 and 266 nm
... of environmental problems. Among them, sulfur trioxide (SO3) has attracted attention as an intermediate in the conversion of SO2 to H2SO4, forming acid rain.1 The kinetics and mechanism of this reaction have been intensively studied experimentally2-4 and theoretically.5-8 Despite the reactivity of S ...
... of environmental problems. Among them, sulfur trioxide (SO3) has attracted attention as an intermediate in the conversion of SO2 to H2SO4, forming acid rain.1 The kinetics and mechanism of this reaction have been intensively studied experimentally2-4 and theoretically.5-8 Despite the reactivity of S ...
Atomic and Ionic Radii of Elements 1–96
... (compared to crystallographic ones) are calculated here for lighter p-block elements, and some deviations are seen in the d-blocks where a few elements show dramatic changes in atomic valence orbital occupation, which affects the radii (Supporting Information, Figure S1). The relative size given by ...
... (compared to crystallographic ones) are calculated here for lighter p-block elements, and some deviations are seen in the d-blocks where a few elements show dramatic changes in atomic valence orbital occupation, which affects the radii (Supporting Information, Figure S1). The relative size given by ...
Document
... As the number of bonds between two atoms increases, the distance between the atoms: a. b. c. d. ...
... As the number of bonds between two atoms increases, the distance between the atoms: a. b. c. d. ...
Metastable inner-shell molecular state
Metastable Innershell Molecular State (MIMS) is a class of ultra-high-energy short-lived molecules have the binding energy up to 1,000 times larger and bond length up to 100 times smaller than typical molecules. MIMS is formed by inner-shell electrons that are normally resistant to molecular formation. However, in stellar conditions, the inner-shell electrons become reactive to form molecular structures (MIMS) from combinations of all elements in the periodic table. MIMS upon dissociation can emit x-ray photons with energies up to 100 keV at extremely high conversion efficiencies from compression energy to photon energy. MIMS is predicted to exist and dominate radiation processes in extreme astrophysical environments, such as large planet cores, star interiors, and black hole and neutron star surroundings. There, MIMS is predicted to enable highly energy-efficient transformation of the stellar compression energy into the radiation energy.The right schematic illustration shows the proposed four stages of the K-shell MIMS (K-MIMS) formation and x-ray generation process. Stage I: Individual atoms are subjected to the stellar compression and ready for absorbing the compression energy. Stage II: The outer electron shells fuse together under increasing ""stellar"" pressure. Stage III: At the peak pressure, via pressure ionization K-shell orbits form the K-MIMS, which is vibrationally hot and encapsulated by a Rydberg-like pseudo-L-Shell structure. Stage IV: The K-MIMS cools down by ionizing (""boiling-off"") a number of pseudo-L-shell electrons and subsequent optical decay by emitting an x-ray photon. The dissociated atoms return their original atoms states and are ready for absorbing the compression energy.MIMS also can be readily produced in laboratory and industrial environments, such as hypervelocity particle impact, laser fusion and z-machine. MIMS can be exploited for highly energy-efficient production of high intensity x-ray beams for a wide range of innovative applications, such as photolithography, x-ray lasers, and inertial fusion.