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Book Synopsis The N-gamma Reaction for Fast Neutrons for Pb208, Bi, and Al by : Joseph S. Levinger
Download or read book The N-gamma Reaction for Fast Neutrons for Pb208, Bi, and Al written by Joseph S. Levinger and published by . This book was released on 1947 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Information Pilot written by and published by . This book was released on 1949 with total page 694 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Abstracts of Declassified Documents by : U.S. Atomic Energy Commission
Download or read book Abstracts of Declassified Documents written by U.S. Atomic Energy Commission and published by . This book was released on 1947 with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consists of AECD 1-2023 (no. 1-1779 called MDDC).
The prompt gamma-radiation from the interaction of fast neutrons with enriched samples of [sup 208]Pb was measured using the white neutron beam of the WNR facility at Los Alamos National Laboratory. The samples were positioned at about 40 m distance from the neutron production target. The spectra of the emitted gamma-rays were measured with a high-resolution HPGe detector. The incident neutron energy was determined by the time-of-flight method and the neutron fluence was measured with a [sup 238]U fission chamber. In addition to the primary purpose of this experiment, the study of (n, xn[gamma]) reactions leading to various lead isotopes, gamma transitions in the residual nuclei [sup 207,205,203,201]Tl were analyzed. From these data gamma-production cross sections in the neutron energy range from the effective thresholds to 200 MeV were derived. The lines for the analysis had to be chosen carefully as the (n, pnx[gamma]) cross sections are rather small and the interference with unresolved lead lines (even weak ones) would cause significant errors. The effect due to isomers with half-lives exceeding a few nanoseconds was taken into account and corrected for, if necessary. The measured cross sections were compared with the results of nuclear model calculations based on the exciton model for preequilibrium particle emission and the Hauser-Feshbach theory for compound nucleus decay. Unlike in the case of (n, xn[gamma]) reactions the calculated results in general did not give a good description of the measured cross sections.
Book Synopsis Sup 208 Pb(n, Pxn Gamma Reactions for Neutron Energies Up to 200 MeV. by :
Download or read book Sup 208 Pb(n, Pxn Gamma Reactions for Neutron Energies Up to 200 MeV. written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The prompt gamma-radiation from the interaction of fast neutrons with enriched samples of [sup 208]Pb was measured using the white neutron beam of the WNR facility at Los Alamos National Laboratory. The samples were positioned at about 40 m distance from the neutron production target. The spectra of the emitted gamma-rays were measured with a high-resolution HPGe detector. The incident neutron energy was determined by the time-of-flight method and the neutron fluence was measured with a [sup 238]U fission chamber. In addition to the primary purpose of this experiment, the study of (n, xn[gamma]) reactions leading to various lead isotopes, gamma transitions in the residual nuclei [sup 207,205,203,201]Tl were analyzed. From these data gamma-production cross sections in the neutron energy range from the effective thresholds to 200 MeV were derived. The lines for the analysis had to be chosen carefully as the (n, pnx[gamma]) cross sections are rather small and the interference with unresolved lead lines (even weak ones) would cause significant errors. The effect due to isomers with half-lives exceeding a few nanoseconds was taken into account and corrected for, if necessary. The measured cross sections were compared with the results of nuclear model calculations based on the exciton model for preequilibrium particle emission and the Hauser-Feshbach theory for compound nucleus decay. Unlike in the case of (n, xn[gamma]) reactions the calculated results in general did not give a good description of the measured cross sections.
Book Synopsis Bibliography [of] Radiation Detection by : U.S. Atomic Energy Commission
Download or read book Bibliography [of] Radiation Detection written by U.S. Atomic Energy Commission and published by . This book was released on 1949 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
The prompt [gamma]-radiation from the interaction of fast neutrons with Al was measured using the white neutron beam of the WNR facility at the Los Alamos National Laboratory. Partial production cross sections for residual nuclei in the range from F to Al were measured from threshold up to 400 MeV by observing the most intense [gamma]-transitions between low lying levels of these nuclei. Two-dimensional neutron time-of-flight versus gamma pulse height spectra from the interaction of the neutrons with Al were observed after flight-paths of about 20 and 40 m with a high-purity Ge-detector. The neutron cross sections for prominent [gamma]-transitions in a large number of residual nuclei could be derived with typical uncertainties of 10--20% up to a neutron energy of 400 MeV. The energy resolution varies from [approx]0.2 MeV at 10 MeV to [approx]50 MeV at 400 MeV. In the low energy range (up to 60 MeV) the results are compared with nuclear model calculations using the code GNASH. A very good overall agreement is obtained without special adjustment of parameters.
Book Synopsis Study of [sup 27]Al(n, X[gamma] Reactions Up to a Neutron Energy of 400 MeV. by :
Download or read book Study of [sup 27]Al(n, X[gamma] Reactions Up to a Neutron Energy of 400 MeV. written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The prompt [gamma]-radiation from the interaction of fast neutrons with Al was measured using the white neutron beam of the WNR facility at the Los Alamos National Laboratory. Partial production cross sections for residual nuclei in the range from F to Al were measured from threshold up to 400 MeV by observing the most intense [gamma]-transitions between low lying levels of these nuclei. Two-dimensional neutron time-of-flight versus gamma pulse height spectra from the interaction of the neutrons with Al were observed after flight-paths of about 20 and 40 m with a high-purity Ge-detector. The neutron cross sections for prominent [gamma]-transitions in a large number of residual nuclei could be derived with typical uncertainties of 10--20% up to a neutron energy of 400 MeV. The energy resolution varies from [approx]0.2 MeV at 10 MeV to [approx]50 MeV at 400 MeV. In the low energy range (up to 60 MeV) the results are compared with nuclear model calculations using the code GNASH. A very good overall agreement is obtained without special adjustment of parameters.
Book Synopsis Measurement of Gamma-ray Production Cross Sections in Neutron-induced Reactions for Al and Pb by :
Download or read book Measurement of Gamma-ray Production Cross Sections in Neutron-induced Reactions for Al and Pb written by and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nucleonics written by and published by . This book was released on 1948 with total page 1254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Book Synopsis United States Government Publications, a Monthly Catalog by : United States. Superintendent of Documents
Download or read book United States Government Publications, a Monthly Catalog written by United States. Superintendent of Documents and published by . This book was released on 1949 with total page 1846 pages. Available in PDF, EPUB and Kindle. Book excerpt: February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.
Book Synopsis United States Government Publications Monthly Catalog by :
Download or read book United States Government Publications Monthly Catalog written by and published by . This book was released on 1949 with total page 960 pages. Available in PDF, EPUB and Kindle. Book excerpt: