Observation of Neutrinos at Super-Kamiokande Observatory
... example, which of neutrinos 1 and 3 in Figure 3 is heavier is not known. In addition, it is still not known whether neutrinos and antineutrinos oscillate in exactly the same way. Furthermore, the universe at present consists mostly of matter—there is practically very little antimatter. For such a un ...
... example, which of neutrinos 1 and 3 in Figure 3 is heavier is not known. In addition, it is still not known whether neutrinos and antineutrinos oscillate in exactly the same way. Furthermore, the universe at present consists mostly of matter—there is practically very little antimatter. For such a un ...
APS Neutrino Study
... sensitive to the number of neutrino flavors, and the present constraints are roughly NBBN = 2 − 4 and NCM B = 1 − 6, respectively, in agreement with accelerator data. Next-generation observations of the primordial abundances of deuterium, helium and lithium will improve the precision of BBN, testing ...
... sensitive to the number of neutrino flavors, and the present constraints are roughly NBBN = 2 − 4 and NCM B = 1 − 6, respectively, in agreement with accelerator data. Next-generation observations of the primordial abundances of deuterium, helium and lithium will improve the precision of BBN, testing ...
4gravitation - The Gravity Search
... pulses of gravitation with a positive potential bias emanating outwards from all bodies of matter. Each proton generates two orbital trajectories, spin up, spin down, only one of which can be occupied by an electron. This is because the negative charge displacement of one electron debars a second el ...
... pulses of gravitation with a positive potential bias emanating outwards from all bodies of matter. Each proton generates two orbital trajectories, spin up, spin down, only one of which can be occupied by an electron. This is because the negative charge displacement of one electron debars a second el ...
Detectors for Quality Assurance in Hadrontherapy Departament de Fisica Doctoral Thesis
... studied. The first is based on inorganic scintillators (crystals) coupled to a photodetector, having many similarities to conventional PET hardware for nuclear medicine. The design for a unit PET detector based on crystal follows the trends in current PET research allowing for the depth-of-interacti ...
... studied. The first is based on inorganic scintillators (crystals) coupled to a photodetector, having many similarities to conventional PET hardware for nuclear medicine. The design for a unit PET detector based on crystal follows the trends in current PET research allowing for the depth-of-interacti ...
Neutron Stars and the Determination of the Dense Matter Equation
... A physical understanding of the behaviour of cold ultra-dense matter – at and above nuclear density – can only be achieved by the study of neutron stars. The surface thermal emission from neutron stars in quiescent low-mass X-ray binaries (qLMXBs) inside globular clusters has proven useful for that ...
... A physical understanding of the behaviour of cold ultra-dense matter – at and above nuclear density – can only be achieved by the study of neutron stars. The surface thermal emission from neutron stars in quiescent low-mass X-ray binaries (qLMXBs) inside globular clusters has proven useful for that ...
Optimization of Signal versus Background in Liquid Xe Detectors
... background rates are essential for identifying WIMP interactions in the detector, which occur with frequencies <1 kg−1 (5 years)−1 . LUX completed its first low-background science run at the Sanford Underground Research Facility in August 2013. WIMP search results are reported from an 85 live day an ...
... background rates are essential for identifying WIMP interactions in the detector, which occur with frequencies <1 kg−1 (5 years)−1 . LUX completed its first low-background science run at the Sanford Underground Research Facility in August 2013. WIMP search results are reported from an 85 live day an ...
3011800000630
... SGRs and DINs, as well as the CCOs in certain SNRs are due to different initial conditions, including the presence or absence and properties of fallback disks. The suggestion that the X-ray luminosity of the AXPs is due to mass accretion from a fallback disk (Chatterjee, Hernquist & Narayan 2000; Al ...
... SGRs and DINs, as well as the CCOs in certain SNRs are due to different initial conditions, including the presence or absence and properties of fallback disks. The suggestion that the X-ray luminosity of the AXPs is due to mass accretion from a fallback disk (Chatterjee, Hernquist & Narayan 2000; Al ...
Facts and Mysteries in Elementary Particle Physics
... as units used and particle naming. We begin in Chapter 2 by introducing the actors, the elementary particles and their interactions. Forces are understood today as due to the interchange of particles, and therefore we will use the word ‘interactions’ rather than the word ‘forces’. The ensemble of pa ...
... as units used and particle naming. We begin in Chapter 2 by introducing the actors, the elementary particles and their interactions. Forces are understood today as due to the interchange of particles, and therefore we will use the word ‘interactions’ rather than the word ‘forces’. The ensemble of pa ...
Using Weak Interaction to Probe Neutrons in Nuclei
... Using Weak Interaction to Probe Neutrons in Nuclei the Why and How Experimentally Robert Michaels ...
... Using Weak Interaction to Probe Neutrons in Nuclei the Why and How Experimentally Robert Michaels ...
Concepts of Modern Physics
... sequence of topics follows a logical rather than strictly historical order. The merits of this approach have led to the extensive worldwide use of the five previous editions of Concepts of Modern Physics, including translations into a number of other languages, since the first edition appeared nearl ...
... sequence of topics follows a logical rather than strictly historical order. The merits of this approach have led to the extensive worldwide use of the five previous editions of Concepts of Modern Physics, including translations into a number of other languages, since the first edition appeared nearl ...
Microscopic vortex velocity in the inner crust and outer core of
... and dripped neutron superfluid interspersed with them is well established since the pioneering work of Negele & Vautherin (1973). The superfluid density inside a nucleus is found to be somewhat larger than the outside dripped superfluid, ρ in > ρ out , in most parts of the inner crust. This means th ...
... and dripped neutron superfluid interspersed with them is well established since the pioneering work of Negele & Vautherin (1973). The superfluid density inside a nucleus is found to be somewhat larger than the outside dripped superfluid, ρ in > ρ out , in most parts of the inner crust. This means th ...
Hot and Dense Matter in Compact Stars – From Nuclei to Quarks
... matter behaves at nuclear and higher densities, providing insights about the physics of nuclear matter and possibly even of new states of matter.” “How Were the Elements from Iron to Uranium Made? While we have a relatively complete understanding of the origin of elements lighter than iron, importan ...
... matter behaves at nuclear and higher densities, providing insights about the physics of nuclear matter and possibly even of new states of matter.” “How Were the Elements from Iron to Uranium Made? While we have a relatively complete understanding of the origin of elements lighter than iron, importan ...
Slides - Indico
... H = Hubble constant G = Newton's gravitational constant = energy density (i.e. photons and neutrinos density in the early Universe) ...
... H = Hubble constant G = Newton's gravitational constant = energy density (i.e. photons and neutrinos density in the early Universe) ...
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.