Estudio de la tasa de reacción 30P(alfa, p)33S de interés as
... are based on statistical Hauser-Feshbach calculations since direct measurements of these reactions were not possible in the past. The applicability of a statistical treatment for light and medium mass nuclei, however, is questionable. Only in recent years have beams of short-lived nuclei become expe ...
... are based on statistical Hauser-Feshbach calculations since direct measurements of these reactions were not possible in the past. The applicability of a statistical treatment for light and medium mass nuclei, however, is questionable. Only in recent years have beams of short-lived nuclei become expe ...
High Energy Astrophysics T. J.
... At present high energy astrophysics is a very lively part of astrophysics. This is due to the fact that the subject did only really start after the beginning of the space age in the 1960s, to a steady progress in the instrumentation available and to an unprecedented set of instruments in orbit now. ...
... At present high energy astrophysics is a very lively part of astrophysics. This is due to the fact that the subject did only really start after the beginning of the space age in the 1960s, to a steady progress in the instrumentation available and to an unprecedented set of instruments in orbit now. ...
A. Point Charge Model for Ion Wakefields
... been examined theoretically using either a Hamiltonian or perturbation theory approach. A Hamiltonian approach typically involves the introduction of an effective Hamiltonian, allowing the stability of the system to be analyzed by mapping its effective potential [10]-[12]. On the other hand, a pertu ...
... been examined theoretically using either a Hamiltonian or perturbation theory approach. A Hamiltonian approach typically involves the introduction of an effective Hamiltonian, allowing the stability of the system to be analyzed by mapping its effective potential [10]-[12]. On the other hand, a pertu ...
Subatomic particle processes within neutron stars
... remnants of massive stars that blew apart in supernova explosions. Together with the white dwarfs and the blackholes, the neutron stars are stellar corps representing the latest phases in the stellar evolution. In a rough characterization, and as most important property for further notice, the masse ...
... remnants of massive stars that blew apart in supernova explosions. Together with the white dwarfs and the blackholes, the neutron stars are stellar corps representing the latest phases in the stellar evolution. In a rough characterization, and as most important property for further notice, the masse ...
Exospheres and Atmospheric Escape
... determine the structure of the corona and lead to molecular escape are considered in this paper. A planet’s atmosphere decreases in density with increasing altitude, thus an altitude is eventually reached above which molecules can travel planetary scale distances with a very small probability of mak ...
... determine the structure of the corona and lead to molecular escape are considered in this paper. A planet’s atmosphere decreases in density with increasing altitude, thus an altitude is eventually reached above which molecules can travel planetary scale distances with a very small probability of mak ...
Spectroscopic observation of helium-ion- and hydrogen
... lower-energy state may be possible by a resonant nonradiative energy transfer such as multipole coupling or a resonant collision mechanism. Processes such as hydrogen molecular bond formation that occur without photons and that require collisions are common [12]. Also, some commercial phosphors are ...
... lower-energy state may be possible by a resonant nonradiative energy transfer such as multipole coupling or a resonant collision mechanism. Processes such as hydrogen molecular bond formation that occur without photons and that require collisions are common [12]. Also, some commercial phosphors are ...
БЕЗОТРАЖАТЕЛЬНОЕ ПРОХОЖДЕНИЕ ВОЛНЫ ЧЕР
... interesting for investigations the new features of wave amplification in inhomogeneous plasma, the plasma instabilities dynamics including waves generation and their nonlinear interactions in the plasma flows presence. New features may appears in the interaction of electromagnetic waves with charged ...
... interesting for investigations the new features of wave amplification in inhomogeneous plasma, the plasma instabilities dynamics including waves generation and their nonlinear interactions in the plasma flows presence. New features may appears in the interaction of electromagnetic waves with charged ...
Shock structure and ion dynamics
... From Zilbersher et al. (1998) and precursors is wavelength of standing whistler waves. Fanis et al /19/ also noted that ramp width is larger then half of the wavelength of precursor, as it should be if the ramp was just a part of the largest whistler Gedalin et al. (2000) wave cycle. It is necessary ...
... From Zilbersher et al. (1998) and precursors is wavelength of standing whistler waves. Fanis et al /19/ also noted that ramp width is larger then half of the wavelength of precursor, as it should be if the ramp was just a part of the largest whistler Gedalin et al. (2000) wave cycle. It is necessary ...
The 13C(α,n)16O reaction rate. Recent estimates, new
... a mass included in the range 0.8 - 3 M⊙ , which actively contribute to the nucleosynthesis of heavy nuclei through neutron capture processes. Roughly a half of all elements heavier than iron in the universe were produced in this way, in the so-called s (slow) process (Burbidge et al., 1957), which b ...
... a mass included in the range 0.8 - 3 M⊙ , which actively contribute to the nucleosynthesis of heavy nuclei through neutron capture processes. Roughly a half of all elements heavier than iron in the universe were produced in this way, in the so-called s (slow) process (Burbidge et al., 1957), which b ...
An exceptionally bright flare from SGR 1806–20 and the origins of
... magnetic reconnection on a magnetar, with possible large-scale untwisting of magnetic field lines outside the star. From a great distance this event would appear to be a short-duration, hard-spectrum cosmic g-ray burst. At least a significant fraction of the mysterious short-duration g-ray bursts ma ...
... magnetic reconnection on a magnetar, with possible large-scale untwisting of magnetic field lines outside the star. From a great distance this event would appear to be a short-duration, hard-spectrum cosmic g-ray burst. At least a significant fraction of the mysterious short-duration g-ray bursts ma ...
Estimation of picked-up lunar ions for future compositional remote SIMS
... and asteroids maintain thin and sometimes transient atmospheres. Of these bodies, the Moon and its atmosphere have been the most extensively investigated, and the findings are thought to be the cornerstone on which to build studies of the other celestial bodies. The lunar atmosphere is called ‘surfa ...
... and asteroids maintain thin and sometimes transient atmospheres. Of these bodies, the Moon and its atmosphere have been the most extensively investigated, and the findings are thought to be the cornerstone on which to build studies of the other celestial bodies. The lunar atmosphere is called ‘surfa ...
Relaxation of Blazar Induced Pair Beams in Cosmic Voids
... growing mode, like any perturbation mode with even a very modest component perpendicular to the beam direction, cannot be described in the reactive regime. Due to the effect of non-linear Landau damping, which suppresses the growth of plasma oscillations, the beam relaxation timescale is found signi ...
... growing mode, like any perturbation mode with even a very modest component perpendicular to the beam direction, cannot be described in the reactive regime. Due to the effect of non-linear Landau damping, which suppresses the growth of plasma oscillations, the beam relaxation timescale is found signi ...
ECOS Report
... years using heavy-ion accelerator facilities delivering stable ion beams with beam intensities that have increased over the years up to a few 1012 particles/sec along with increasingly sensitive instruments. Furthermore, small-scale low-energy accelerators have been used for the study of nuclear rea ...
... years using heavy-ion accelerator facilities delivering stable ion beams with beam intensities that have increased over the years up to a few 1012 particles/sec along with increasingly sensitive instruments. Furthermore, small-scale low-energy accelerators have been used for the study of nuclear rea ...
Neutron Stars - Lick Observatory
... arise. The basic difficulty in predicting neutron star properties is that matter at supernuclear densities is not well understood. There are a number of possible states for matter. The simplest is a uniform liquid of neutrons and protons in $-equilibrium, with a neutralizing background of negative c ...
... arise. The basic difficulty in predicting neutron star properties is that matter at supernuclear densities is not well understood. There are a number of possible states for matter. The simplest is a uniform liquid of neutrons and protons in $-equilibrium, with a neutralizing background of negative c ...
Parity violating measurements of neutron densities
... 7. How stringent do precise data on (i) the neutron radius of 48Ca, (ii) the neutron radius of 208Pb, and (iii) the electric dipole polarizability of 208Pb constrain the density dependence of the symmetry energy (or the isovector sector of EDFs)? 8. Do "ab-initio" calculations of 48Ca place stringen ...
... 7. How stringent do precise data on (i) the neutron radius of 48Ca, (ii) the neutron radius of 208Pb, and (iii) the electric dipole polarizability of 208Pb constrain the density dependence of the symmetry energy (or the isovector sector of EDFs)? 8. Do "ab-initio" calculations of 48Ca place stringen ...
MS Word - Boston University
... The ISEE-1 satellite has observed butterfly pitch angle distributions (PAD) in protons and electrons from 20 keV to 2 MeV in the low latitude outer magnetosphere, which showed a sharp dropout in the flux of 90-degree pitch angle particles. These distributions were present on the night side near the ...
... The ISEE-1 satellite has observed butterfly pitch angle distributions (PAD) in protons and electrons from 20 keV to 2 MeV in the low latitude outer magnetosphere, which showed a sharp dropout in the flux of 90-degree pitch angle particles. These distributions were present on the night side near the ...
pps - TUM
... A series of equations like the above are then solved over the mass region A = 56 to A = 209. We are taking 56Fe as the seed nuclide that stars the s-process. Initial condition: only 56Fe present as a seed. All others are zero. ...
... A series of equations like the above are then solved over the mass region A = 56 to A = 209. We are taking 56Fe as the seed nuclide that stars the s-process. Initial condition: only 56Fe present as a seed. All others are zero. ...
Targets
... To extend the study of the structure of nuclei far from stability Production of RIB's via the fission process induced - either by fast neutrons from a C converter in a UCx target goal >1013 fissions/s - or by direct bombardment of fissile material Production of heavy ion beams for fusion-evapora ...
... To extend the study of the structure of nuclei far from stability Production of RIB's via the fission process induced - either by fast neutrons from a C converter in a UCx target goal >1013 fissions/s - or by direct bombardment of fissile material Production of heavy ion beams for fusion-evapora ...
ASTR 1101-001 Spring 2008 - Louisiana State University
... Low-, Moderately Low-, & HighMass Stars along the MS ...
... Low-, Moderately Low-, & HighMass Stars along the MS ...
ASTR 31: Descriptive Astronomy
... beryllium-8 (4 protons + 4 neutrons): 8Be carbon-12 (6 protons + 6 neutrons): 12C oxygen-16 (8 protons + 8 neutrons): 16O neon-20 (10 protons + 10 neutrons): 20Ne magnesium-24 (12 protons + 12 neutrons): 24Mg silicon-28 (14 protons + 14 neutrons): 28Si sulfer-32 (16 protons + 16 neutrons): 32S argon ...
... beryllium-8 (4 protons + 4 neutrons): 8Be carbon-12 (6 protons + 6 neutrons): 12C oxygen-16 (8 protons + 8 neutrons): 16O neon-20 (10 protons + 10 neutrons): 20Ne magnesium-24 (12 protons + 12 neutrons): 24Mg silicon-28 (14 protons + 14 neutrons): 28Si sulfer-32 (16 protons + 16 neutrons): 32S argon ...
Lesson 4: Stellar Explosions and Neutron Stars
... • Rapid neutron capture (r-process): • To make elements heavier than bismuth-209, neutron capture must proceed more rapidly than it takes for the newly formed elements to radioactively decay back to where they started. This is possible only for about 15 minutes, during the supernova explosion itself ...
... • Rapid neutron capture (r-process): • To make elements heavier than bismuth-209, neutron capture must proceed more rapidly than it takes for the newly formed elements to radioactively decay back to where they started. This is possible only for about 15 minutes, during the supernova explosion itself ...
Determination of the levitation limits of dust particles within the
... are used as probes for the sheath are presented. The experimental results are compared with numerical results to locate the approximate height above the lower electrode where quasineutrality is attained, locating the sheath edge, and the extent of the unstable region near the lower electrode, locati ...
... are used as probes for the sheath are presented. The experimental results are compared with numerical results to locate the approximate height above the lower electrode where quasineutrality is attained, locating the sheath edge, and the extent of the unstable region near the lower electrode, locati ...
Introduction to High Energy Density Physics
... Most phenomena can be grasped using a single fluid – with radiation, – perhaps multiple temperatures, – perhaps heat transport, viscosity, other forces ...
... Most phenomena can be grasped using a single fluid – with radiation, – perhaps multiple temperatures, – perhaps heat transport, viscosity, other forces ...
The on quilibrium ISIS
... Characteristics of our spectral code (Ji PhD thesis 2006) based on the updated atomic data (CHIANTI , APED) the atomic data and the code are separate ...
... Characteristics of our spectral code (Ji PhD thesis 2006) based on the updated atomic data (CHIANTI , APED) the atomic data and the code are separate ...
Fusor
A fusor is a device that uses an electric field to heat ions to conditions suitable for nuclear fusion. The machine has a voltage between two metal cages inside a vacuum. Positive ions fall down this voltage drop, building up speed. If they collide in the center, they can fuse. This is a type of Inertial electrostatic confinement device.A Farnsworth–Hirsch fusor is the most common type of fusor. This design came from work by Philo T. Farnsworth (in 1964) and Robert L. Hirsch in 1967. A variant of fusor had been proposed previously by William Elmore, James L. Tuck, and Ken Watson at the Los Alamos National Laboratory though they never built the machine.Fusors have been built by various institutions. These include academic institutions such as the University of Wisconsin–Madison, the Massachusetts Institute of Technology and government entities, such as the Atomic Energy Organization of Iran and the Turkish Atomic Energy Authority. Fusors have also been developed commercially, as sources for neutrons by DaimlerChrysler Aerospace and as a method for generating medical isotopes. Fusors have also become very popular for hobbyists and amateurs. A growing number of amateurs have performed nuclear fusion using simple fusor machines.