Dark Matter, EDM and bariogenesis
... Traditional “scattering-off-nuclei” searches for heavy WIMP dark matter particles (χ) have not yet produced a strong positive result. ...
... Traditional “scattering-off-nuclei” searches for heavy WIMP dark matter particles (χ) have not yet produced a strong positive result. ...
Electron Scattering from an Almost Free Neutron in
... from neutrons bound in deuterium nuclei at Jefferson Lab’s Hall B with the intent of n p n obtaining the ratio F2 / F2 at high Bjorken x. The F2 structure function is difficult to obtain due to nature’s lack of a free neutron target. Previous experiments have measured n inclusive scattering from ato ...
... from neutrons bound in deuterium nuclei at Jefferson Lab’s Hall B with the intent of n p n obtaining the ratio F2 / F2 at high Bjorken x. The F2 structure function is difficult to obtain due to nature’s lack of a free neutron target. Previous experiments have measured n inclusive scattering from ato ...
On the possibility of a helium white dwarf donor in the presumed
... outer layers that were lost being outside the Roche lobe. Juett et al. and Nelemans et al. suggest that spallation of accreted elements may be important (e.g., Bildsten et al. 1992). However, it is not trivial to invoke spallation. Spallation requires hydrogen nuclei (protons) to bombard the higher- ...
... outer layers that were lost being outside the Roche lobe. Juett et al. and Nelemans et al. suggest that spallation of accreted elements may be important (e.g., Bildsten et al. 1992). However, it is not trivial to invoke spallation. Spallation requires hydrogen nuclei (protons) to bombard the higher- ...
The DRIFT Dark Matter Project - School of Physics and Astronomy
... what would be achievable if this was supplemented by a realistic active neutron veto detector. It is found that a CS2 -filled DRIFT type detector running at a 500 NIP threshold (∼16 keV and ∼27 keV for C and S recoils respectively) for 300 kg years, and surrounded by the proposed veto scheme, would ...
... what would be achievable if this was supplemented by a realistic active neutron veto detector. It is found that a CS2 -filled DRIFT type detector running at a 500 NIP threshold (∼16 keV and ∼27 keV for C and S recoils respectively) for 300 kg years, and surrounded by the proposed veto scheme, would ...
A New Search for the Neutron Electric Dipole Moment Funding Pre-proposal
... The possible existence of a nonzero electric dipole moment of the neutron is of great fundamental interest in itself and directly impacts our understanding of the nature of electro-weak and strong interactions. The experimental search for this moment has the potential to reveal new sources of T and ...
... The possible existence of a nonzero electric dipole moment of the neutron is of great fundamental interest in itself and directly impacts our understanding of the nature of electro-weak and strong interactions. The experimental search for this moment has the potential to reveal new sources of T and ...
Physics of Neutron Star Crusts - Institut d`Astronomie et d
... accretion, and briefly review the phenomenon of X-ray bursts. We quantitatively analyze the phenomenon of the deep crustal heating. To construct a neutron star model one needs the equation of state (EoS) of the crust, reviewed in Section 5. We consider separately the ground-state crust, and the accre ...
... accretion, and briefly review the phenomenon of X-ray bursts. We quantitatively analyze the phenomenon of the deep crustal heating. To construct a neutron star model one needs the equation of state (EoS) of the crust, reviewed in Section 5. We consider separately the ground-state crust, and the accre ...
Part 15 - Chemical shifts of nitriles
... (SCS) in a variety of molecules. These SCS were analysed in terms of the CN electric field, magnetic anisotropy and steric effects for protons more than three bonds removed together with a model (CHARGE7) for the calculation of the two- and three-bond SCS. For the aromatic nitriles ring current and ...
... (SCS) in a variety of molecules. These SCS were analysed in terms of the CN electric field, magnetic anisotropy and steric effects for protons more than three bonds removed together with a model (CHARGE7) for the calculation of the two- and three-bond SCS. For the aromatic nitriles ring current and ...
Current Status of Nuclear Physics Research
... The tunnel effect is responsible for the long time scale of stellar burning. Without tunneling there would be no stars as we know them. It is not a coincidence that all main physics related to the understanding of how stars shine occurred in parallel with advances in Nuclear Physics. The more we lea ...
... The tunnel effect is responsible for the long time scale of stellar burning. Without tunneling there would be no stars as we know them. It is not a coincidence that all main physics related to the understanding of how stars shine occurred in parallel with advances in Nuclear Physics. The more we lea ...
Chemistry
... and how it works. This is not all, as many of the sciences that we know depend on chemistry in explaining their phenomena. In this unit, you will understand the fieldwork of chemistry and the operations that chemists follow. You will also understand the role of chemistry in our life and its relation ...
... and how it works. This is not all, as many of the sciences that we know depend on chemistry in explaining their phenomena. In this unit, you will understand the fieldwork of chemistry and the operations that chemists follow. You will also understand the role of chemistry in our life and its relation ...
Neutrino Sources and Detectors
... electron is observed because it bends in magnetic fields and can ionise gas in drift chambers due to the fact that it is electrically charged. This is all depends on the particle having some property which can interact with the matter around it : for most particles this is either electrical charge o ...
... electron is observed because it bends in magnetic fields and can ionise gas in drift chambers due to the fact that it is electrically charged. This is all depends on the particle having some property which can interact with the matter around it : for most particles this is either electrical charge o ...
Paper (pdf)
... which absorbs soft X-rays. A column density of 2 × 1020 cm−2 results in an optical depth of about 1 at 0.25 keV. Thus, for many extragalactic sources where the line of sight column density is not too high, the observed photon spectrum will peak near 0.25 keV, which is where we will tune the multilay ...
... which absorbs soft X-rays. A column density of 2 × 1020 cm−2 results in an optical depth of about 1 at 0.25 keV. Thus, for many extragalactic sources where the line of sight column density is not too high, the observed photon spectrum will peak near 0.25 keV, which is where we will tune the multilay ...
Formation of millisecond pulsars with CO white dwarf companions–I
... star (essentially the mass of the white dwarf to be formed); M NS is the mass of the neutron star; and a is the final orbital separation after the CE phase. Strictly speaking, when considering the energy budget the ‘effective efficiency parameter’ should also include the excess energy of the ejected ...
... star (essentially the mass of the white dwarf to be formed); M NS is the mass of the neutron star; and a is the final orbital separation after the CE phase. Strictly speaking, when considering the energy budget the ‘effective efficiency parameter’ should also include the excess energy of the ejected ...
Fundamentals oF modern Physics
... that represents the physics of the problem should be drawn first, then the mathematics should be added. Physics is such a logical subject that when a student sees an illustrative problem worked out, either in the textbook or on the blackboard, it usually seems very simple. Unfortunately, for most st ...
... that represents the physics of the problem should be drawn first, then the mathematics should be added. Physics is such a logical subject that when a student sees an illustrative problem worked out, either in the textbook or on the blackboard, it usually seems very simple. Unfortunately, for most st ...
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.