Egle Tomasi Gustafsson
... • Recent and precise data on the proton time-like form factors measured by the BABAR collaboration show a systematic sinusoidal modulation in the near-threshold region. • The relevant variable is the momentum p associated to the relative motion of the final hadrons. • The periodicity and the simple ...
... • Recent and precise data on the proton time-like form factors measured by the BABAR collaboration show a systematic sinusoidal modulation in the near-threshold region. • The relevant variable is the momentum p associated to the relative motion of the final hadrons. • The periodicity and the simple ...
find - UNAM
... mass, with a potential FBH r 2GM BH =r: We model accretion on to the black hole by placing an absorbing boundary at the Schwarzschild radius rSch 2GM BH =c2 . Any particle that crosses this boundary is absorbed by the black hole and removed from the simulation. The mass and position of the b ...
... mass, with a potential FBH r 2GM BH =r: We model accretion on to the black hole by placing an absorbing boundary at the Schwarzschild radius rSch 2GM BH =c2 . Any particle that crosses this boundary is absorbed by the black hole and removed from the simulation. The mass and position of the b ...
Gamow-Teller response in deformed even and odd neutron
... using twelve major shells. The method also includes pairing between like nucleons in BCS approximation with fixed gap parameters for protons and neutrons, which are determined phenomenologically from the odd-even mass differences through a symmetric five term formula involving the experimental bindi ...
... using twelve major shells. The method also includes pairing between like nucleons in BCS approximation with fixed gap parameters for protons and neutrons, which are determined phenomenologically from the odd-even mass differences through a symmetric five term formula involving the experimental bindi ...
Light n-Capture Element Abundances in Metal
... to beta decay. When neutron capture yields an unstable nucleus, there is sufficient time for beta decay to occur, leading to a stable nucleus of atomic number one higher than the parent nucleus. This is not so in the case of the r-process, where captures occur in rapid succession, leading to isotope ...
... to beta decay. When neutron capture yields an unstable nucleus, there is sufficient time for beta decay to occur, leading to a stable nucleus of atomic number one higher than the parent nucleus. This is not so in the case of the r-process, where captures occur in rapid succession, leading to isotope ...
The fuelling of local supermassive black holes
... Thanks to Chandra (=highest angular resolution ever), a few of these questions can be addressed [ both the hot ISM and the nuclear emission show up in the X-ray band ]. ...
... Thanks to Chandra (=highest angular resolution ever), a few of these questions can be addressed [ both the hot ISM and the nuclear emission show up in the X-ray band ]. ...
The Propagation of Ultra High Energy Cosmic Rays
... particles produced through cosmic ray energy loss interactions en route, and the arriving cosmic ray spectra at Earth. A large range of nuclear species are considered in this work, spanning the range of physically motivated nuclear types ejected from the cosmic ray source. The treatment of cosmic ra ...
... particles produced through cosmic ray energy loss interactions en route, and the arriving cosmic ray spectra at Earth. A large range of nuclear species are considered in this work, spanning the range of physically motivated nuclear types ejected from the cosmic ray source. The treatment of cosmic ra ...
On the dynamics of proto-neutron star winds and r
... the outflow abruptly, the reverse shock does not only raise the entropy of the matter, but in particular it slows down the temperature and density decline that takes place in the subsequent expansion. Kuroda et al. (2008) pointed out that the change in the temperature behavior plays a decisive role ...
... the outflow abruptly, the reverse shock does not only raise the entropy of the matter, but in particular it slows down the temperature and density decline that takes place in the subsequent expansion. Kuroda et al. (2008) pointed out that the change in the temperature behavior plays a decisive role ...
Origin and Evolution of Neutron Star Magnetic Fields - if
... Recently, bursts have been detected from two AXPs (Gavriil et al. 2002; Kaspi et al. 2003), making the connection even closer. Differences remain in terms of X-ray spectra, burst frequency, and timing stability, but it is not clear whether there is a dichotomy or just a continuum of properties, with ...
... Recently, bursts have been detected from two AXPs (Gavriil et al. 2002; Kaspi et al. 2003), making the connection even closer. Differences remain in terms of X-ray spectra, burst frequency, and timing stability, but it is not clear whether there is a dichotomy or just a continuum of properties, with ...
Nuclear drip line
In nuclear physics, the boundaries for nuclear particle-stability are called drip lines. Atomic nuclei contain both protons and neutrons—the number of protons defines the identity of that element (ie, carbon always has 6 protons), but the number of neutrons within that element may vary (carbon-12 and its isotope carbon-13, for example). The number of isotopes each element may have is visually represented by plotting boxes, each of which represents a unique nuclear species, on a graph with the number of neutrons increasing on the abscissa (X axis) and number of protons increasing along the ordinate (Y axis). The resulting chart is commonly referred to as the table of nuclides, and is to nuclear physics what the periodic table of the elements is to chemistry.An arbitrary combination of protons and neutrons does not necessarily yield a stable nucleus. One can think of moving up and/or to the right across the nuclear chart by adding one type of nucleon (i.e. a proton or neutron, both called nucleons) to a given nucleus. However, adding nucleons one at a time to a given nucleus will eventually lead to a newly formed nucleus that immediately decays by emitting a proton (or neutron). Colloquially speaking, the nucleon has 'leaked' or 'dripped' out of the nucleus, hence giving rise to the term ""drip line"". Drip lines are defined for protons, neutrons, and alpha particles, and these all play important roles in nuclear physics. The nucleon drip lines are at the extreme of the proton-to-neutron ratio: at p:n ratios at or beyond the driplines, no stable nuclei can exist. The location of the neutron drip line is not well known for most of the nuclear chart, whereas the proton and alpha driplines have been measured for a wide range of elements. The nucleons drip out of such unstable nuclei for the same reason that water drips from a leaking faucet: in the water case, there is a lower potential available that is great enough to overcome surface tension and so produces a droplet; in the case of nuclei, the emission of a particle from a nucleus, against the strong nuclear force, leaves the total potential of the nucleus and the emitted particle in a lower state. Because nucleons are quantized, only integer values are plotted on the table of isotopes; this indicates that the drip line is not linear but instead looks like a step function up close.