Author: Stephen L. YarbroPublisher:
ISBN:
Category : Gamma ray spectrometry
Languages : en
Pages : 0
Book Description
Preparation of Pure Neptunium Oxide for Nondestructive Assay Standards
Author: Stephen L. YarbroPublisher:
ISBN:
Category : Gamma ray spectrometry
Languages : en
Pages : 0
Book Description
Preparation of Pure Neptunium Oxide for Nondestructive Assay Standards
Author: Stephen L. YarbroPublisher:
ISBN:
Category : Gamma ray spectrometry
Languages : en
Pages : 5
Book Description
Energy Research Abstracts
Author: Preparation of Pure Plutonium Metal Standards for Nondestructive Assay
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
To calibrate neutron coincidence and neutron multiplicity counters for passive assay of plutonium, certain detector parameters must be determined. When one is using small plutonium metal samples, biases can be introduced from non-zero multiplication and impurities. This paper describes preparing small, pure plutonium metal standards with well-known geometries to enable accurate multiplication corrections and with acceptably low levels of impurities. To minimize multiplication, these standards are designed as 2-cm-diameter foils with varying thicknesses and masses of 1.4, 3.6, and 7.2 g plutonium. These standards will significantly improve characterization and calibration of neutron coincidence and multiplicity counters. They can also be equally useful for gamma-ray spectrometry and calorimetry. Five sets will be made: four for other US Department of Energy plutonium facilities, and one set to remain at Los Alamos. We will also describe other nondestructive assay standards that are planned for the next few years.
Preparation of Neptunium-237 Metal
Author: A. N. MorganPublisher:
ISBN:
Category : Neptunium
Languages : en
Pages : 32
Book Description
Preparation of High Purity Neptunium on Multi-gram Scale
Author: P. M. LantzPublisher:
ISBN:
Category : Neptunium
Languages : en
Pages : 32
Book Description
Preparation of Highly Pure Neptunium Oxides
Author: William V. ConnerPublisher:
ISBN:
Category : Ion exchange
Languages : en
Pages : 5
Book Description
A 200 gram batch of neptunium was purified using a combined nitrate and chloride anion exchange process. The actinide impurity content of the purified NpO2 product was
Neptunium-237; Production and Recovery
Author: Wallace W. SchulzPublisher:
ISBN:
Category : Science
Languages : en
Pages : 100
Book Description
Preparation of Small Well Characterized Plutonium Oxide Reference Materials and Demonstration of the Usefulness of Such Materials for Nondestructive Analysis
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 32
Book Description
Calibration of neutron coincidence and multiplicity counters for passive nondestructive analysis (NDA) of plutonium requires knowledge of the detector efficiency parameters. These are most often determined empirically. Bias from multiplication and unknown impurities may be incurred even with small plutonium metal samples. Five sets of small, pure plutonium metal standards prepared with well-known geometry and very low levels of impurities now contribute to determining accurate multiplication corrections. Recent measurements of these metal standards, with small but well-defined multiplication and negligible yield of other than fission neutrons, demonstrate an improved characterization and calibration of neutron coincidence/multiplicity counters. The precise knowledge of the mass and isotopic composition of each standard also contributes significantly to verifying the accuracy of the most precise calorimetry and gamma-ray spectroscopy measurements.
Author: