Thermal-neutron Capture-gamma Spectrum of 242Pu
Author : Philip Joseph Bendt
Publisher :
Page : 15 pages
File Size : 11,35 MB
Release : 1979
Category : Neutron capture gamma ray spectroscopy
ISBN :
Thermal-neutron Capture-gamma Spectrum of 242Pu
Author :
Publisher :
Page : pages
File Size : 39,40 MB
Release : 1979
Category :
ISBN :
Book Description
The (n, .gamma.) spectrum from a sample of 242Pu irradiated in the thermal column of the Omega West Reactor was observed from 100 to 5200 keV with both Ge(Li) and NaI(Tl) detectors. The energies and partial cross sections were determined for 407 gamma lines, using the Ge(Li) detector. The continuous spectrum observed with NaI(Tl) is displayed in 20 keV energy bins. Summing over the NaI(Tl) spectrum, an (n, .gamma.) cross section equal to 18.5 +- 1 barns was obtained, and also a multiplicity of 4.5 +- 0.2 photons per captured neutron. 9 references.
Application of Thermal Neutron Capture-gamma Ray Analysis to Oxidized Taconite Beneficiation Process Slurries
Author : Franklin B. W. Woodbury
Publisher :
Page : 80 pages
File Size : 50,40 MB
Release : 1980
Category : Flotation
ISBN :
Book Description
Thermal-neutron Capture-gamma Spectrum of 242Pu
Author : Philip Joseph Bendt
Publisher :
Page : 15 pages
File Size : 32,3 MB
Release : 1979
Category : Neutron capture gamma ray spectroscopy
ISBN :
Book Description
Non-destructive Assay Of[sup 242]Pu by Resonance Neutron Capture
Author :
Publisher :
Page : pages
File Size : 38,8 MB
Release : 2001
Category :
ISBN :
Book Description
For the accurate assay of plutonium by neutron correlation measurements, especially for material derived from high-burnup reactor fuel, the content of[sup 242]Pu in a sample must be determined. Since[sup 242]Pu has a long half-life (387,000 yr) and decays to[sup 238]U by alpha particle emission with the accompanying emission of only weak, low-energy gamma rays, gamma-ray spectrometry methods which are ordinarily employed to determine the isotopic composition of a plutonium sample are not feasible for[sup 242]Pu. The existence of a resonance in the neutron capture cross section of[sup 242]Pu at an energy of 2.67 electron volts (eV) with a large (72, 000 barn) cross section affords the possibility for the quantitative assay of this isotope by epithermal neutron capture. Essential for this purpose is an appropriately designed geometry of neutron moderators and absorbers which will provide maximum flux in the eV region while suppressing thermal neutron capture by the fissile plutonium isotopes. Signatures for neutron capture in[sup 242]Pu include the decay of[sup 243]Pu (4.9 hr), prompt capture gamma rays (total energy 5.034 MeV), and the decay of an isomeric state (330 nanosecond). Experiments to determine the feasibility of this approach are currently in progress.
Non-destructive Assay of 242Pu by Resonance Neutron Capture
Author :
Publisher :
Page : 5 pages
File Size : 27,68 MB
Release : 1995
Category :
ISBN :
Book Description
For the accurate assay of plutonium by neutron correlation measurements, especially for material derived from high-burnup reactor fuel, the content of 242Pu in a sample must be determined. Since 242Pu has a long half-life (387,000 yr) and decays to 238U by alpha particle emission with the accompanying emission of only weak, low-energy gamma rays, gamma-ray spectrometry methods which are ordinarily employed to determine the isotopic composition of a plutonium sample are not feasible for 242Pu. The existence of a resonance in the neutron capture cross section of 242Pu at an energy of 2.67 electron volts (eV) with a large (72, 000 barn) cross section affords the possibility for the quantitative assay of this isotope by epithermal neutron capture. Essential for this purpose is an appropriately designed geometry of neutron moderators and absorbers which will provide maximum flux in the eV region while suppressing thermal neutron capture by the fissile plutonium isotopes. Signatures for neutron capture in 242Pu include the decay of 243Pu (4.9 hr), prompt capture gamma rays (total energy 5.034 MeV), and the decay of an isomeric state (330 nanosecond). Experiments to determine the feasibility of this approach are currently in progress.
Thermal-neutron-capture Gamma-ray Spectrum from U238
Author : R. W. Kenney
Publisher :
Page : 16 pages
File Size : 46,89 MB
Release : 1956
Category : Neutron capture gamma ray spectroscopy
ISBN :
Book Description
Thermal-neutron Capture Gamma-rays
Author :
Publisher :
Page : pages
File Size : 31,53 MB
Release : 2001
Category :
ISBN :
Book Description
The energy and photon intensity of gamma rays as seen in thermal-neutron capture are presented in ascending order of gamma energy. All those gamma-rays with intensity of[ge] 2% of the strongest transition are included. The two strongest transitions seen for the target nuclide are indicated in each case. Where the target nuclide mass number is indicated as nat the natural target was used. The gamma energies given are in keV. The gamma intensities given are relative to 100 for the strongest transition. All data for A> 44 are taken from Evaluated Nuclear Structure Data File (4/97), a computer file of evaluated nuclear structure data maintained by the National Nuclear Data Center, Brookhaven National Laboratory, on behalf of the Nuclear Structure and Decay and Decay Data network, coordinated by the International Atomic Energy Agency, Vienna. These data are published in Nuclear Data Sheets, Academic Press, San Diego, CA. The data for A[le] 44 is taken from''Prompt Gamma Rays from Thermal-Neutron Capture, '' M.A. Lone, R.A. Leavitt, D.A. Harrison, Atomic Data and Nuclear Data Tables 26, 511 (1981).
Thermal Neutron Capture Gamma-rays
Author :
Publisher :
Page : pages
File Size : 49,29 MB
Release : 1983
Category :
ISBN :
Book Description
The energy and intensity of gamma rays as seen in thermal neutron capture are presented. Only those (n, .cap alpha.), E = thermal, reactions for which the residual nucleus mass number is greater than or equal to 45 are included. These correspond to evaluations published in Nuclear Data Sheets. The publication source data are contained in the Evaluated Nuclear Structure Data File (ENSDF). The data presented here do not involve any additional evaluation. Appendix I lists all the residual nuclides for which the data are included here. Appendix II gives a cumulated index to A-chain evaluations including the year of publication. The capture gamma ray data are given in two tables - the Table 1 is the list of all gamma rays seen in (n, .gamma.) reaction given in the order of increasing energy; the Table II lists the gamma rays according to the nuclide.
Thermal-neutron Capture Gamma-rays
Author :
Publisher :
Page : 80 pages
File Size : 36,93 MB
Release : 1997
Category :
ISBN :
Book Description
The energy and photon intensity of gamma rays as seen in thermal-neutron capture are presented ordered by Z, A of target nuclei. All gamma-rays with intensity of e"% of the strongest transition are included. The strongest transition is indicated in each case. Where the target nuclide mass number is indicated as nat the natural target was used. The gamma energies given are in keV. The gamma intensities given are relative to 100 for the strongest transition. All data for A> 44 are taken from Evaluated Nuclear Structure Data File (4/97), a computer file of evaluated nuclear structure data maintained by the National Nuclear Data Center, Brookhaven National Laboratory, on behalf of the Nuclear Structure and Decay and Decay Data network, coordinated by the International Atomic Energy Agency, Vienna. These data are published in Nuclear Data Sheets, Academic Press, San Diego, CA. The data for A d"44 is taken from ''Prompt Gamma Rays from Thermal-Neutron Capture, '' M.A. Lone, R.A. Leavitt, D.A. Harrison, Atomic Data and Nuclear Data Tables 26, 511 (1981).
