STATUS OF ACTINIDE HALF LIVES
As actinide half lives enter as major parameters in the correction for sample decay in the precision measurement of fission cross sections of fissile isotopes, as well as in the mass determination of samples, they are considered as important standards. A coordinated research programme on the measurement and evaluation of transactinium isotope decay data has been pursued under IAEA auspices for several years. Participants in this programme, composed of a number of specialists active in this field, produce updated lists of recommended actinide decay properties. The most recent of these lists, which has been published in INDC(NDS)-149/NE (December 1983), represents the current status of heavy element radionuclide half lives. The standard relevant numerical values given below were taken from this compilation. The complete listing given in INDC(NDS)-149/NE includes a wide range of heavy elements of broader interest than that of nuclear standards. The data have been drawn from the following existing decay data files: - ENSDF, the Evaluated Nuclear Structure and Decay Data File maintained by the United States National Nuclear Data Center, at Brookhaven, - the actinide data file of the Idaho National Engineering Laboratory (INEL) which serves as the source file for the decay data part of the ENDF/B compilation, and - the UK Chemical Nuclear Data Committee Heavy Element Decay Data file, compiled at the AEE Winfrith laboratory. Whenever warranted, the half-life data are supplemented or superseded by the latest known measured and/or evaluated values. The master file is kept at the IAEA Nuclear Data Section.
Bibliographic Reference: NEANC-MEETING, TOKAI-MURA (JAPAN), MARCH 12-16, 1984 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31435 ORA
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Record Number: 1989122075300 / Last updated on: 1987-01-01
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