Advances in Gamma Ray Resonant Scattering and Absorption PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Advances in Gamma Ray Resonant Scattering and Absorption PDF full book. Access full book title Advances in Gamma Ray Resonant Scattering and Absorption by Andrey V. Davydov. Download full books in PDF and EPUB format.
Author: Andrey V. Davydov Publisher: Springer ISBN: 9783319105253 Category : Science Languages : en Pages : 192
Book Description
This book presents the basics and advanced topics of research of gamma ray physics. It describes measuring of Fermi surfaces with gamma resonance spectroscopy and the theory of angular distributions of resonantly scattered gamma rays. The dependence of excited-nuclei average lifetime on the shape of the exciting-radiation spectrum and electron binding energies in the spectra of scattered gamma rays is described. Resonant excitation by gamma rays of nuclear isomeric states with long lifetime leads to the emission and absorption lines. In the book, a new gamma spectroscopic method, gravitational gamma spectrometry, is developed. It has a resolution hundred million times higher than the usual Mössbauer spectrometer. Another important topic of this book is resonant scattering of annihilation quanta by nuclei with excited states in connection with positron annihilation. The application of the methods described is to explain the phenomenon of Coulomb fragmentation of gamma-source molecules and resonant scattering of annihilation quanta to study the shape of Fermi surfaces of metals.
Author: Andrey V. Davydov Publisher: Springer ISBN: 9783319105253 Category : Science Languages : en Pages : 192
Book Description
This book presents the basics and advanced topics of research of gamma ray physics. It describes measuring of Fermi surfaces with gamma resonance spectroscopy and the theory of angular distributions of resonantly scattered gamma rays. The dependence of excited-nuclei average lifetime on the shape of the exciting-radiation spectrum and electron binding energies in the spectra of scattered gamma rays is described. Resonant excitation by gamma rays of nuclear isomeric states with long lifetime leads to the emission and absorption lines. In the book, a new gamma spectroscopic method, gravitational gamma spectrometry, is developed. It has a resolution hundred million times higher than the usual Mössbauer spectrometer. Another important topic of this book is resonant scattering of annihilation quanta by nuclei with excited states in connection with positron annihilation. The application of the methods described is to explain the phenomenon of Coulomb fragmentation of gamma-source molecules and resonant scattering of annihilation quanta to study the shape of Fermi surfaces of metals.
Author: Andrey V. Davydov Publisher: Springer ISBN: 3319105248 Category : Science Languages : en Pages : 201
Book Description
This book presents the basics and advanced topics of research of gamma ray physics. It describes measuring of Fermi surfaces with gamma resonance spectroscopy and the theory of angular distributions of resonantly scattered gamma rays. The dependence of excited-nuclei average lifetime on the shape of the exciting-radiation spectrum and electron binding energies in the spectra of scattered gamma rays is described. Resonant excitation by gamma rays of nuclear isomeric states with long lifetime leads to the emission and absorption lines. In the book, a new gamma spectroscopic method, gravitational gamma spectrometry, is developed. It has a resolution hundred million times higher than the usual Mössbauer spectrometer. Another important topic of this book is resonant scattering of annihilation quanta by nuclei with excited states in connection with positron annihilation. The application of the methods described is to explain the phenomenon of Coulomb fragmentation of gamma-source molecules and resonant scattering of annihilation quanta to study the shape of Fermi surfaces of metals.
Author: M. YAQUB Publisher: ISBN: Category : Languages : en Pages : 1
Book Description
A study of the resonant absorption of the 23.8 KeV gamma-rays in Sn-119 was made between 373 and 1.1 K by using the Sb-119 K-capture parent. The source was prepared by bombarding natural Sn with 10 MeV deuterons in a cyclotron, and was thick enough to absorb resonantly a large portion of the recoilless photons emitted. By studying the self-absorption in this source between 373 and 60 K and taking into account the contributions to the intensity due to resonant scattering, an average value of the Debye temperature, theta, was derived. In order to see if the phonon spectrum undergoes a change in passing from the superconducting to the normal phase, the counting rate was measured at several temperatures between 4.2 and 1.1 K, with and without a magnetic field strong enough to destroy the superconductivity of the source. Using the derived value of 140 K for theta, it was concluded that the change in theta between the two phases could not be more than 0.76 K. (Author).
Author: O. I. Leipunskii Publisher: Elsevier ISBN: 1483135942 Category : Science Languages : en Pages : 241
Book Description
The Propagation of Gamma Quanta in Matter deals with various problems of the propagation and absorption of gamma quanta in matter, including the occurrence of multiple scattering of radiation. A general account of theoretical methods of solving problems of multiple scattering of quanta is presented, with emphasis on the results of solving such problems. This book consists of three chapters and begins with a discussion on the interaction of gamma radiation with matter; multiple scattering of gamma quanta; and the distribution function and quantities connected with it. The next chapter focuses on the theory of multiple scattering of gamma quanta and covers subjects such as the transport equation and its analytical solution; method of moments; method of random sampling; and method of successive collisions. The last chapter examines the propagation of radiation for various geometrical configurations of the sources and absorbing media, paying particular attention to a point source in a homogeneous medium and on the boundary of two media; unidirectional radiation in a homogeneous medium; reflexion of gamma radiation from the surface of a scattering medium; a plane isotropic source; and a thick radiating layer of an absorbing medium. This monograph will appeal to students as well as physicists and engineers engaged in shield design problems.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The feasibility of employing the Mossbauer resonant absorption phenomenon for new and useful applications of radioisotopes was studied and evaluated. For these experimental studies radioactive Co/sup 57/ sources were used which allow observations of the Mossbauer resonance in Fe/sup 57/ at room temperatures. However, the results of the investigations can be extrapolated to other Mossbauer isotopes which, unfortunately, usually require low-temperature apparatus to obtain an appreciable fraction of recoilless emissions and absoiptions. The investigations centered aiound the utilization of the Mossbauer effect for practical problems in measui ement and control technology. The use of nuclear resonant techniques in the general areas involving small velocity, acceleration, and displacement measurements appears very promising. For example, velocities in the range from 0.005 to 0.0l5 cm/sec are easily measured using Fe/ sup 57/ nuclear resonance, and this range can be extended several orders of magnitude in both directions if other sources and techniques are endployed. Measurements of gravitational fields in interplanetary space or on the surfaces of celestial bodies, together with altitude measurements of space vehicles, using Mossbauer techniques do not appear practical because the measurement times required to obtain reasonably accurate results is of the order of hours or days under the most favorable circumstances. Experimental measurements of the effects of high pressures on the fractional resonant absorptions showed no observable changes when a Co/sup 57/-stainless steel source was subjected to pressures up to 40,000 psi, although higher pressures or other Mossbauer sources may make pressure measurements practical. Experiments showed that it is possible to determine the direction and strengths of homogeneous magnetic fields in a range from 300 to 1000 gauss by measuring the percentage of nuclear resonance in iron foils. Although the method is not, in general, as accurate as conventional techniques, such a system warrants further study since it might have definite practicality when hostile environments or accessibility problems limit or prohibit the use of conventional techniques. Initial studies also showed that nuclear resonance techniques could be used to measure the amplitudes of acoustical (mechanical) motion in the megacycle frequency region. The results gave every indication that such measurements could be extended to higher frequencies and possibly into the hypersonic, kilo-megacycle ranges where currently there are no suitable methods available to measure acoustical power or acoustical energy densities. (auth).
Author: Gordon Gilmore Publisher: John Wiley & Sons ISBN: 1119964695 Category : Science Languages : en Pages : 597
Book Description
The Second Edition of Practical Gamma-Ray Spectrometry has been completely revised and updated, providing comprehensive coverage of the whole gamma-ray detection and spectrum analysis processes. Drawn on many years of teaching experience to produce this uniquely practical volume, issues discussed include the origin of gamma-rays and the issue of quality assurance in gamma-ray spectrometry. This new edition also covers the analysis of decommissioned nuclear plants, computer modelling systems for calibration, uncertainty measurements in QA, and many more topics.
Author: Andrey V. Davydov
Author: Andrey V. Davydov
Author: Andrey V. Davydov
Author: J. J. Ezop
Author: M. YAQUB
Author: Janice L. Bishop
Author: Dafydd ap Emrys Evans
Author: O. I. Leipunskii
Author: 
Author: Gordon Gilmore
Author: Hans Frauenfelder