Second report of work carried out by the Institute for Nuclear Research for Los Alamos National Laboratory under Agreement 2493N0005-35

This report provides information about work carried out to complete the tasks required of the Institute for Nuclear Research (INR) of the Russian Academy of Sciences in accordance with Agreement 2493N0005-35 with Los Alamos National Laboratory. This report details work carried out for the following parts of the agreement under Task Order 002: the INR shall measure the 51Cr source activity to an accuracy of at least 5% by measuring the amount of 51Cr activity remaining in each of the irradiated enriched 50Cr rods used in the Cr calibration experiment, this shall be done by direct counting using a high resolution Ge solid state detector; the INR shall measure the level of any residual radioimpurities in the 51Cr source by direct counting each of the rods of the 51Cr source using a high resolution Ge solid state detector. The following sections of this report shall constitute the following deliverables: a report describing the procedures used to measure the amount of residual 51Cr in the irradiated 50Cr rods, along with the value of the 51Cr source intensity determined using this method; a list of the long-lived radioimpurities and their intensities in the irradiated 50Cr rods