skip to main content

SciTech ConnectSciTech Connect

Title: Detecting low concentrations of plutonium hydride with magnetization measurements

We report the formation of plutonium hydride in 2 at. % Ga-stabilized δ-Pu, with 1 at. % H charging. We show that magnetization measurements are a sensitive, quantitative measure of ferromagnetic plutonium hydride against the nonmagnetic background of plutonium. It was previously shown that at low hydrogen concentrations, hydrogen forms super-abundant vacancy complexes with plutonium, resulting in a bulk lattice contraction. Here, we use magnetization, X-ray, and neutron diffraction measurements to show that in addition to forming vacancy complexes, at least 30% of the H atoms bond with Pu to precipitate PuH{sub x} on the surface of the sample with x ∼ 1.9. We observe magnetic hysteresis loops below 40 K with magnetic remanence, consistent with ferromagnetic PuH{sub 1.9}.
Authors:
; ; ; ;  [1] ; ; ; ;  [2]
  1. National High Magnetic Field Laboratory, MPA-CMMS, Los Alamos National Laboratory (LANL), Los Alamos, New Mexico 87545 (United States)
  2. Nuclear Material Science Group, MST-16, LANL, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
22413038
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CONCENTRATION RATIO; FERROMAGNETIC MATERIALS; FERROMAGNETISM; HYDROGEN; HYSTERESIS; MAGNETIZATION; NEUTRON DIFFRACTION; PLUTONIUM; PLUTONIUM HYDRIDES; PRECIPITATION; SURFACES; VACANCIES; X-RAY DIFFRACTION