Determination of hafnium in zirconium and its alloys by stable isotope dilution-neutron activation analysis

Abstract

2059that generation of 2p core holes occws by processes other than emission of the ESCA '2p electrons. This could depend on other fadors not related to the chemical state of the compound like the state of subdivision of the sample. Thus, the CU 2pfAuger ratio would be of dubious value though the LMVfLVV ratio should be unaffected. Finally, no complications arise in the Auger spectra because of the use of nonmonochromatic X radiation. Registry No.

High conduction neutron absorber to simulate fast reactor environment in an existing test reactor

“…The thermal absorption cross-section of hafnium is 104 barns [2], where 176 Hf, 177 Hf and 178 Hf account for *100 barns, 174 Hf accounts for *2 barns and 176 Hf and 180 Hf account for the remainder [15]. Table 8 lists the induced radionuclides from neutron capture, along with their respective cross-sections and half-lives [16]. The isotope 175 Hf, which is the result of activation from 174 Hf, has a cross-section nearly four times that of naturally occurring hafnium.…”

Determination of Microamounts of Hafnium in Zirconium Using Inductively Coupled Plasma Atomic Emission Spectrometry and Inductively Coupled Plasma Mass Spectrometry during Their Separation by Ion Exchange on Diphonix Chelating Resin

“…Various techniques such as neutron activation analysis (NAA), , isotopic dilution spark source mass spectrometry (ID SS MS), spectrophotometry, , emission spectrography, , spectrofluorimetry assisted by chemometric methods, inductively coupled plasma atomic emission spectrometry (ICP-AES), and X-ray fluorescence spectrometry (XRF) − have been used for determination of impurities of Hf in zirconium matrix. Generally, many of them suffer due to matrix interferences and some of them are not suitable for determination of microamounts of hafnium in zirconium.…”