Neutron Scattering Cross Section Measurements for 169Tm Via the Time-of-flight Technique
Title | Neutron Scattering Cross Section Measurements for 169Tm Via the Time-of-flight Technique PDF eBook |
Author | Afrim Alimeti |
Publisher | |
Pages | 216 |
Release | 2010 |
Genre | Thulium |
ISBN |
Fast Neutron Cross Section Measurements. Final Technical Report, March 1, 1987--September 30, 1995
Title | Fast Neutron Cross Section Measurements. Final Technical Report, March 1, 1987--September 30, 1995 PDF eBook |
Author | |
Publisher | |
Pages | 90 |
Release | 1997 |
Genre | |
ISBN |
The time-of-flight technique was used with the ring scattering geometry in a laboratory with low neutron scattering background to measure the angular distributions of the cross sections for elastic and inelastic scattering of 14 MeV neutrons in natural chromium, iron, nickel, and niobium. Specifically for inelastic scattering included were: the 1.43 MeV and 4.56 MeV levels of 52Cr, the 0.85 MeV level, and (2.94-3.12) MeV and (4.46-4.51) MeV level groups of 56Fe, the 1.33 MeV level of 6°Ni combined with the 1.45 MeV level of 58Ni, and the 4.48 MeV level of 58Ni. Pulses of neutrons with time width of 0.9-1.1 ns were produced via the 3H(d, n)4He reaction in a 150 keV Cockcroft-Walton linear accelerator, with average intensities of 9x108 n/s. The energy of the incident neutrons was between 14.75 MeV (at 16°) and 13.48 MeV (at 160°). High purity scattering ring samples were used. The scattering angles ranged from (almost equal to)16° to (almost equal to)150°, for iron, chromium, and nickel, and from (almost equal to)16° to (almost equal to)160° for niobium, with a typical step of (almost equal to)10°. High purity ring samples were used.
Multiple Scattering Corrections for the Associated-particle Neutron Time-of-flight Technique
Title | Multiple Scattering Corrections for the Associated-particle Neutron Time-of-flight Technique PDF eBook |
Author | Allan C. B. Richardson |
Publisher | |
Pages | 72 |
Release | 1969 |
Genre | Fast neutrons |
ISBN |
The computer code, MAGGIE, for the calculation of multiple scattering and sample attenuation in neutron differential cross-section measurements, has been revised and corrected.The particular case of the scattering geometry required by the associated-particle time-of-flight is considered in detail.(Author).
Proceedings of a Conference [on] Neutron Cross Sections and Technology, March 4-7, 1968
Title | Proceedings of a Conference [on] Neutron Cross Sections and Technology, March 4-7, 1968 PDF eBook |
Author | D. T. Goldman |
Publisher | |
Pages | 738 |
Release | 1968 |
Genre | Neutron cross sections |
ISBN |
Fast Neutron Cross Section Measurement System and Results
Title | Fast Neutron Cross Section Measurement System and Results PDF eBook |
Author | Dale W. Glasgow |
Publisher | |
Pages | 202 |
Release | 1973 |
Genre | |
ISBN |
A system has been designed and constructed for high accuracy neutron cross section measurements using pulsed beam time-of-flight techniques. The detection system has been used to obtain neutron scattering cross sections for Al, Si, Fe, Ni, and Co at 9.0 MeV incident neutron energy and to obtain a survey of neutron scattering by Carbon from 7 to 9 MeV incident energy. The cross sections have a normalization uncertainty or accuracy of about 5%, precision of 2-3% for strongly excited groups, and a precision of 5-10% for weakly excited groups. The report presents detailed design criteria for the detection system, and a description of detector shielding constructed for the measurements. It also contains a study of the data corrections which most strongly influence the accuracy of results. (Modified author abstract).
Integral Measurements to Test Neutron Scattering and Gamma-Ray Production Cross Sections for Be, C, N, H2O, and Fe
Title | Integral Measurements to Test Neutron Scattering and Gamma-Ray Production Cross Sections for Be, C, N, H2O, and Fe PDF eBook |
Author | L Harris (Jr) |
Publisher | |
Pages | 304 |
Release | 1975 |
Genre | |
ISBN |
Incident-neutron-energy-dependent measurements of scattered neutrons and secondary gamma rays for small samples of Be, C, N, H2O, and Fe have been performed at four scattering angles (30, 55, 90 and 125 degrees). The pulsed-white-neutron source, time-of-flight (TOF) method, and NE-213 detector with pulse-shape discrimination, three-parameter data acquisition with an online computer and spectrum unfolding were used to measure incident-neutron-energy-dependent, count rates and energy spectra of scattered neutrons (E sub n> 1 MeV) and secondary gamma rays (E sub gamma> 1 MeV) for incident neutron energies from 2 to 20 MeV. The measurements provide high sensitivity tests for integral and differential neutron scattering and gamma-ray production cross sections when compared with appropriate transport calculations. Differences between measurements and calculations should be interpretable in terms of specific cross-section deficiencies at well-defined incident-neutron energies from 2 to 20 MeV. The source spectrum of neutrons incident on the samples was measured by TOF using the NE-213 detector. (Author).
Neutron Cross Section Measurements Using Pulsed Sources
Title | Neutron Cross Section Measurements Using Pulsed Sources PDF eBook |
Author | |
Publisher | |
Pages | 24 |
Release | 1965 |
Genre | |
ISBN |