Dynamic nuclear orientation.

  • 177 Pages
  • 2.10 MB
  • English
Interscience Publishers , New York
Nuclear reactions., Nuclear spin., Quantum electro
SeriesInterscience tracts on physics and astronomy,, 23, Interscience tracts on physics and astronomy ;, 23.
LC ClassificationsQC794 .J4 1963
The Physical Object
Paginationviii, 177 p.
ID Numbers
Open LibraryOL5888913M
LC Control Number63022203

Additional Physical Format: Online version: Jeffries, C.D., Dynamic nuclear orientation. New York, Interscience Publishers, (OCoLC) This book will be difficult to get, so to a large extent this review will be unnecessary. A search will however find an online version for download.

es covers the techniques of dynamic nuclear orientation, and the reasons for using it in analysis as well as the theoretical background.5/5(1). Dynamic nuclear polarization (DNP) results from transferring spin polarization from electrons to nuclei, thereby aligning the nuclear spins to the extent that electron spins are aligned.

Note that the alignment of electron spins at a given magnetic field and temperature is described by the Boltzmann distribution under the thermal equilibrium. It is also possible that those electrons are. Dynamic nuclear orientation.

Jeffries, C. D., View full catalog record. Rights: Public Domain, Google-digitized. Get this Book. Find in a library; Download this page (PDF) Download left page (PDF) Download right page (PDF) About this Book/Tools Sidebar.

Dynamic nuclear polarization (DNP) is the transfer of polarization from electron spins to nuclear spins by saturating the resonance for electron-spin energy levels. 7,62,63 This polarization transfer due to hyperfine couplings Dynamic nuclear orientation. book performed by applying a microwave field.

Abstract Not Available Bibtex entry for this abstract Preferred format for this abstract (see Preferences): Find Similar Abstracts. Book Review: Dynamic nuclear orientation. C.D. JEFFRIES, (Interscience Tracts on Physics & Astronomy, Vol. 23) pages, Price 45/. This is a text in nuclear reactor dynamics suitable for undergraduate seniors and graduate students in science and engineering.

The topic of reactor dynamics, particularly in the form necessary to understand the computation that occurs both in control system analysis and safety analysis, is treated only incompletely in previous texts/5(2). Enhancement of nuclear polarisation by the Overhauser effect and the solid effect (to be defined later) is discussed by Abragam (, chap IX).

A monograph by Jeffries () gives a detailed description of electronic and nuclear relaxation in solids, followed by an introduction to various methods of dynamic nuclear orientation.

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Dynamic Nuclear Polarization (DNP) is a phenomenon by which high spin polarization, typically derived from a bath of free radical electrons, is transferred to a nuclear spin bath, enhancing the difference between the nuclear energy levels and thereby producing. The orientation of the aluminum nuclei has a much longer lifetime then its thermal decay.

With the creation-annihilation cloud, generated by the Earth, and disorienting of the mass nuclei, occurs at the expense of the mean disordered motion of this cloud. Too fast a flipping of dynamic nuclear orientation, would increase a gravitational field. Mathematical Methods in Nuclear Reactor Dynamics Article (PDF Available) in IEEE Transactions on Plasma Science 3(4) - January with 2, Reads How we measure 'reads'.

Dynamic Nuclear Orientation (New York et al.: Interscience Publishers, ), by C. Jeffries (page images at HathiTrust) Filed under: Nuclear reactors Nuclear Power Engineering (New York et al.: McGraw-Hill Book Co., ), by M.

El-Wakil (page images at HathiTrust). NMR of Paramagnetic Molecules: Applications to Metallobiomolecules and Models, Second Edition is a self-contained, comprehensive reference for chemists, physicists, and life scientists whose research involves analyzing paramagnetic compounds.

Since the previous edition of this book was published, there have been many advancements in the field. Based on Dr. Alzofon’s model, weight loss should not have occurred with the magnetic field OFF, since dynamic nuclear orientation couldn’t happen if the EPR resonance condition was not satisfied during the microwave ON periods.

To this effect, in the third paragraph of page Alzofon writes. Book Description: The Mont Tremblant International Summer Scholl was primarily concerned with the dynamic structure of nuclear states. The papers presented at that summer school in August,are reproduced in this volume.

(a few μs). Its initially poor energy resolution, due to the uncertain position and orientation of the nuclear. Dynamic Nuclear Orientation (New York et al.: Interscience Publishers, ), by C. Jeffries (page images at HathiTrust) Filed under: Gamma ray spectrometry Calculations of the Penetration of Gamma Rays: Final Report (White Plains, NY: Nuclear Development Associates; Oak Ridge, TN: U.S.

Atomic Energy Commission, ), by Herbert Goldstein. The mechanisms of dynamic orientation of nuclei were studied in organic materials at temperature below 1 K and magnetic fields up to 50 kG. The dynamic polarization experiments in diols, doped with paramagnetic Cr(V) -complexes, are described.

Description Dynamic nuclear orientation. EPUB

These measurements are compared quantitatively with a spin temperature model, in which the polarization of the nuclei is obtained via the thermal.

Appropriately, the inherent low polarization allows for a theoretical sensitivity enhancement of more t The NMR signal enhancement of protons which can be achieved by means of Dynamic Nuclear Polarization (DNP) is approximately In this book, different hardware aspects and polarizing agents for DNP were : Paperback.

This means of producing nuclear orientation is called the static method. In contrast, there is the dynamic method, which is related to optical pumping in gases. There are other ways to produce oriented nuclei; for example, in a nuclear reaction such as the capture of polarized neutrons (produced by magnetic scattering) by unoriented nuclei.

In nuclear medicine, the distribution of a molecule is visualised by using an attached radioactive atom in the molecule which allows visualisation of the distribution using nuclear medicine scanners (gamma camera and PET scanners).

In essence, you. The outer and inner nuclear membranes are fused at sites of nuclear pore complexes (NPCs), macromolecular structures that allow selective passage of proteins, RNA and other molecules to and from the nucleus.

1 In most eukaryotes, underlying the inner nuclear membrane is a network of proteins, called the nuclear lamina, made of lamins and lamin.

Abstract. The optical polarization of nuclear spins may develop in a semiconductor when it is illuminated by circularly polarized light (Lampel, Phys.

Rev. Lett. 20, [], Optical orientation,[]).The ultimate reason of this phenomenon is the hyperfine interaction of electron and nuclear spins, enabling the transfer of angular momentum (spin) from optically oriented electrons to.

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Abstract. The behavior of nuclear polarization in a substance, i.e., a solution of the complex HMBA(Cr V)Na + in 1,2-propylene glycol used in polarized nuclear targets is experimentally investigated by magnetic spectroscopic methods under conditions of dynamic nuclear polarization at hv S /kT=≈− Nuclear polarization is measured and analyzed as a function of time at different values.

Polarization Phenomena in Physics Applications to Nuclear Reaction. This book allows the reader to understand the fundamentals of polarization phenomena in a general spin system, showing the polarizations to be indispensable information source of spin-dependent interactions.

resulting in nuclear orientation. The lower the temperature, the greater is the degree of nuclear orientation. In figure 1 we show some population distributions for a nuclear spin system with 1=3 and EUkk=( K)m, which are the values for the 54MnNi y-RA thermometer.

The first three, (a), (b). Nuclear orientation via electron spin locking (NOVEL) is a technique to orient nuclear spins embedded in a solid. Like other methods of dynamic nuclear polarization (DNP) it employs a small amount. Researchers can use dynamic nuclear polarization to boost signal intensities in nuclear magnetic resonance (NMR) experiments, a technique known as DNP-NMR.

NMR spectroscopy is an important technique for the determination of structures in material science and structural biology. Nuclear rotation ranges from stochastically or oscillatory rotation of the nucleus back and forth within a few degrees only to more sustained and directional rotation that changes the nuclear orientation.

2, 3, Sustained nuclear rotation could be induced by diverse stimuli such as mechanical shear stress 16 or cyclical stretches of the. For me this book was annoying. It is a "green nuclear" book that argues that nuclear power is necessary to save the world from global warming. The author does this by taking tours with a nuclear scientist through the whole nuclear cycle from mine to power plant to waste storage repository.4/5(47).

Introduction to Dynamic Nuclear Polarization V.A. Atsarkin, “Dynamic polarization of nuclei in solid dielectrics” Sov. Phys. Usp. 21, () “Mechanism of Dynamic Nuclear Polarization in High Magnetic Fields,” J. Chem. Physics– (). Thierry Dubroca, PhD Postdoctoral Associate gives an overview of the Dynamic Nuclear Polarization facility at the National High Magnetic Field Laboratory.We develop a formal model of bargaining between two states where one can invest in a program to develop nuclear weapons and the other imperfectly observes its efforts and progress over time.

In the absence of a nonproliferation deal, the observing state watches the former's program, waiting until proliferation seems imminent to attack.