The UK Activation Product Decay Data Library: UKPADD6.8

The latest version of the UK Activation Product Decay Data Library (UKPADD6.8) was assembled for general use in March 2008, and is described in detail in the report JEFDOC-1227.pdf (see below).

The decay data of various radionuclides have been evaluated on the basis of a series of well-defined specifications derived from the requirements of the UK nuclear power, fuel reprocessing and waste management programmes. These radionuclides are primarily activation products that are of immediate relevance to the European Fusion Programme and to the operation and decommissioning/disposal of fission-based reactor facilities, along with various standards that are commonly used to calibrate gamma-ray spectrometers. Over more recent years, decay scheme data for a number of fission products have also been evaluated and included in UKPADD on request because of their known inadequacies in other equivalent databases. Recommended data include half-lives, branching fractions, alpha, beta and gamma-ray energies and emission probabilities, total decay energies, mean alpha, beta and gamma energies, internal conversion coefficients, and all associated uncertainties. Computer-based files have been generated in ENDF-6 format, including lists of the references used to produce the proposed decay schemes and comments that identify any observed inadequacies. All evaluations for UKPADD6.8 were carried out by Dr A L Nichols.

The previous version of the library, UKPADD6.7, was released in March 2007. This library had been assembled over a number of years and the structure of many of the older files no longer conformed to modern standards, causing difficulties in the assimilation of data from UKPADD into the JEFF-3 decay data file. Thus, all data sets within UKPADD6.8 have been updated to bring them up to the required standard and to facilitate the adoption of the data into JEFF-3 and future libraries. This work was sponsored by the UK Nuclear Decommissioning Authority through Nexia Solutions Ltd.

Data for 23 nuclides have been newly evaluated or re-evaluated in UKPADD6.8 during the course of 2007/08. These evaluations were sponsored by the UK Atomic Energy Authority in support of the European Fusion Programme.

The following data files and reports are available for download:

• UKPADD68: The ENDF-6 formatted library (12.3 Mb)
• Documentation, A.L. Nichols and R.J. Perry (JEFDOC-1227 in PDF format)

Isotope	Output	Output	, Isotope	Output	Output
cd113	CHECKR	FIZCON	, pt190	CHECKR	FIZCON
cd113m	CHECKR	FIZCON	, re184	CHECKR	FIZCON
dy166	CHECKR	FIZCON	, sc45m	CHECKR	FIZCON
ga70	CHECKR	FIZCON	, se79	CHECKR	FIZCON
ge71	CHECKR	FIZCON	, sn121	CHECKR	FIZCON
ge71m	CHECKR	FIZCON	, sn121m	CHECKR	FIZCON
ge75	CHECKR	FIZCON	, tm170	CHECKR	FIZCON
ge75m	CHECKR	FIZCON	, y90	CHECKR	FIZCON
nb90	CHECKR	FIZCON	, y90m	CHECKR	FIZCON
nb90m	CHECKR	FIZCON	, yb176m	CHECKR	FIZCON
nb90n	CHECKR	FIZCON	, zr90m	CHECKR	FIZCON
os189m	CHECKR	FIZCON

Last updated: 14 April 2008.