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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: 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: United States. Department of Commerce. Office of Technical Services Publisher: ISBN: Category : Government publications Languages : en Pages : 836
Author: H. Thayne Johnson Publisher: Springer Science & Business Media ISBN: 1475708394 Category : Technology & Engineering Languages : en Pages : 1697
Book Description
HIS FIRST EDITION OF Electronic Properties of Force Materials Laboratory, where Air Force respon T Materials: A Guide to the Literature initiates a sibility for these contracts has resided. Mr. John W. plan for making available the indexing work of the Atwood is Project Manager at Hughes Aircraft Electronic Properties Information Center. Since the Company. inception of EPIC in June, 1961, a basic objective has Professional members of EPIC are Charles L. M. been to use techniques and procedures that would Blocher, Donald L. Grigsby, Dana H. Johnson, allow maximum distribution and use of EPIC output. Thomas J. Lyndon, John T. Milek, Meta S. Neu Accordingly, data processing and reproduction tech berger, and Emil Schafer. All have ably contributed niques were established to reproduce and distribute to this work. Mr. Johnson and Mrs. Neuberger have easily and economically a few copies of what was been primarily responsible for the indexing effort; then a card index. Mr. Lyndon has supervised the classical library pro As the program advanced, it became apparent that cedures and the clerical effort; Mr. Blocher and Mr. a few copies of the index were not enough. The index Grigsby have controlled the indexing vocabulary, the should be available to all, instead of just a select few. cross-references, and the data processing input; and However, this would have meant so many copies that Mr. Schafer has prepared the very excellent glossary, the cost would have drained funds from the program with the assistance of Mr. Milek.
Author: M. YAQUB
Author: M. YAQUB
Author: Richard Clair McCall
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Author: United States. Department of Commerce. Office of Technical Services
Author: Nichigai Asoshiētsu
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Author: Mary Elizabeth Stevens
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Author: H. Thayne Johnson