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Gamma Rays Associated With Fission
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Book Synopsis GAMMA RAYS ASSOCIATED WITH FISSION. by :
Download or read book GAMMA RAYS ASSOCIATED WITH FISSION. written by and published by . This book was released on 1958 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of the energy spectra and time distribution of the fission-associated gamma rays are described. New data for thermal neutron-induced fission in U235 is presented covering the energy range between 0.3 and 8.0 Mev. Gamma-ray energy analysis was carried out with a multiple-crystal scintillation spectrometer employing either Compton scattering of pair production to give unique pulse-height response. The importance of unique spectrometer response is explained. The gamma-ray spectrometer was operated in coincidence with a spiral-wound fission chamber by the use of a four-fold coincidence circuit having a resolving time of 6 x 10−8 sec. Spectral measurements for delayed fission radiation were obtained with a similar gamma-ray spectrometer. Energy distributions from 0.3 to 5.4 Mev are presented for ten delay times between 1.7 and 1550 sec. Gamma radiation delayed between 6 x 10−8 and 3 x 10−6 sec after fission was observed following thermal-neutron induced fission. This radiation appeared to be about 6% as intense as the prompt radiation. No gamma-rays in the range from 3 to 7 x 10−6 sec were observed within limitations imposed by random backgrounds. No measurements were reported in the time range between 7 x 106 sec and 1 sec. New data presented include time time dependence of the gamma radiation delayed from 1 to 1600 sec after fission, divided into six gamma-ray energy intervals betwveen 0.28 and 5.0 Mev. These data are in good agreement with the energy-spectral data. Comparisons are also made with data available from gross fission-product photoneutron yields and chemically separated fission-product nuclides. (auth).
Book Synopsis Gamma Rays Associated with Fission by : F. C. Maienschein
Download or read book Gamma Rays Associated with Fission written by F. C. Maienschein and published by . This book was released on 1958 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Information on the Gamma Energy Radiation Rate from Fission Products, and Its Significance for Studies of Radioactive Fallout by : Harold A. Knapp
Download or read book A Review of Information on the Gamma Energy Radiation Rate from Fission Products, and Its Significance for Studies of Radioactive Fallout written by Harold A. Knapp and published by . This book was released on 1959 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Fission Gamma Rays by : M. Deutsch
Download or read book Investigation of Fission Gamma Rays written by M. Deutsch and published by . This book was released on 1952 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Beta Decays and Delayed Gammas from Fission Fragments by : James Griffin
Download or read book Beta Decays and Delayed Gammas from Fission Fragments written by James Griffin and published by . This book was released on 1963 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis GAMMA-1 Emission of Prompt Gamma-Rays in Fission and Related Topics by : Stephan Oberstedt
Download or read book GAMMA-1 Emission of Prompt Gamma-Rays in Fission and Related Topics written by Stephan Oberstedt and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Four Parameter Measurements of Delayed Gamma Rays from Spontaneous Fission of ℗¿℗Cf by : Frank Walton Guy
Download or read book Four Parameter Measurements of Delayed Gamma Rays from Spontaneous Fission of ℗¿℗Cf written by Frank Walton Guy and published by . This book was released on 1970 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Emission of Gamma Radiation as a Function of Time After Photofission of U238 by : R. B. WALTON
Download or read book Emission of Gamma Radiation as a Function of Time After Photofission of U238 written by R. B. WALTON and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The intensity of delayed gamma rays from the photofission of U-238 was measured from 30 microsec to 8 sec after fission. The delayed gamma-ray intensity falls by a factor of about 100 between 30 and 800 microsec after fission, then remains almost constant up to the vicinity of 0.5 sec, beyond which time it decreases at a rate consistent with results obtained by Maienschein (Proc. Second Geneva Conf. P/670, 1958). The present data were normalized to the absolute data of Maienschein in the time region from 1 to 10 sec after fission. Since the apparent half-life of the decay at early times is about 80 microsec, the gamma rays associated with this period probably arise from the decay of one or more fission products formed in isomeric states. Measurements repeated with a bias energy of 510 kev showed the same initial decay characteristic, indicating that some of the gamma rays contributing to the short-lived component have energies greater than 500 kev. In an attempt to evaluate neutron backgrounds using a mercury sample, gamma rays with energies less than about 500 kev and an apparent half-life of 102 microsec were observed. These gamma rays probably resulted from the decay of a mercury reaction product not previously reported. (Author).
Book Synopsis The Attenuation of Gamma Rays and Neutrons in Reactor Shields by : Herbert Goldstein
Download or read book The Attenuation of Gamma Rays and Neutrons in Reactor Shields written by Herbert Goldstein and published by . This book was released on 1957 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Statistical Theory of Nuclear Fission by : Peter Fong
Download or read book Statistical Theory of Nuclear Fission written by Peter Fong and published by . This book was released on 1969 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Early Time Decay of Fission Product Mixtures by : P. Zigman
Download or read book Early Time Decay of Fission Product Mixtures written by P. Zigman and published by . This book was released on 1959 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Conference on Nuclear Fission and Radiochemical Research Associated with Nuclear Reactors, June 14-15, 1949 by : Brookhaven National Laboratory
Download or read book Conference on Nuclear Fission and Radiochemical Research Associated with Nuclear Reactors, June 14-15, 1949 written by Brookhaven National Laboratory and published by . This book was released on 1949 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gamma-ray Spectra of the Products of Fast Neutron Fission of U235 and U238 at Selected Times After Fission by : Leland R. Bunney
Download or read book Gamma-ray Spectra of the Products of Fast Neutron Fission of U235 and U238 at Selected Times After Fission written by Leland R. Bunney and published by . This book was released on 1966 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental measurements of the gamma-ray pulse height distributions due to the products of fast-neutron-induced fission of Uranium-235 and Uranium-238 are presented. The measurements were made at nine selected times after fission from 15 minutes to 3 days. Irradiation times and counting intervals were chosen to minimize saturation and decay effects. The experimental data were used to calculate 100 energy bin distributions of the absolute number of photons/fission-sec. by means of absolute calibrations of the collimated NaI(T1) detector. The number of fissions in each sample was determined radiochemically. Machine computation was used extensively.
Book Synopsis Hard Gamma Emitters Among Fission Fragments by : William Krasny Ergen
Download or read book Hard Gamma Emitters Among Fission Fragments written by William Krasny Ergen and published by . This book was released on 1951 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of fission gamma rays by : Martin Deutsch
Download or read book Investigation of fission gamma rays written by Martin Deutsch and published by . This book was released on 1944 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis AFRRI's Gamma-ray, X-ray, and Fission-neutron Calibration Curves for the Lymphocyte Dicentric Assay by : P. G. S. Prasanna
Download or read book AFRRI's Gamma-ray, X-ray, and Fission-neutron Calibration Curves for the Lymphocyte Dicentric Assay written by P. G. S. Prasanna and published by . This book was released on 2002 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Facilities are established at the Armed Forces Radiobiology Research Institute (AFRRI) to perform radiation-induced chromosome aberration analysis for biological dosimetry. Whole blood from healthy human volunteers was used after obtaining informed consent. Peripheral blood lymphocytes were exposed in vitro to different types of radiation; sup 60 Co gamma rays (E(gamma) = 1.25 MeV, mean of the absorbed dose distribution of the lineal energy, y(sub D) = 1.9 keV/micrometers, 1 Gy/min); x rays (250 kV(sub p), E = 83 keV, y(sub D) = 4 keV/micrometers, 1 Gy/min); or a fission-spectrum neutron source (E = 0.71 MeV, y(sub D) = 65 keV/micrometers, 0.25 Gy/min). Distribution of radiation-induced dicentrics among cells exhibited Poisson statistics as characterized by the Papworth method (Papworth 1970). Dose-response relationships for the yield of dicentrics for photon sources were fitted with a linear-quadratic model using the maximum-likelihood method and for the neutron source by a weighted linear regression method. Comparison of the data with other published studies is presented. The dose-response relationships for dicentric induction by low-and high-linear energy transfer (LET) radiation are consistent with the single- and two-track model of aberration formation, Y = alpha D + beta D(sup 2). An increase in y(sub D) resulted in an increase in dicentric yield. As expected, fission neutrons induced a significantly higher yield of dicentrics than that caused by low-LET sources. The linear component of the model, corresponding to damage caused by single-tracks, is predominant with fission neutrons so that the dose-effect relationship is essentially linear. An automated metaphase finder system with a satellite scoring utility was used to improve data collection.
Book Synopsis Fission Product Yields and Their Mass Distribution by : ZYSIN YU. A.
Download or read book Fission Product Yields and Their Mass Distribution written by ZYSIN YU. A. and published by . This book was released on 1995-12-31 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
