1. NAME AND TITLE OF DATA LIBRARY

ELECSPEC: Electron Spectra from Decay of Fission Products.

2. NAME AND TITLE OF DATA RETRIEVAL PROGRAM

BETASP: Beta-Ray Spectrum Computation.

3. CONTRIBUTOR

Oak Ridge National Laboratory, Oak Ridge, Tennessee.

4. HISTORICAL BACKGROUND AND INFORMATION

Because of disagreements between existing calculations and measurements, an extensive evaluation was undertaken to provide beta-ray and antineutrino spectra from fission products (Dickens 1981).

5. APPLICATIONS OF THE DATA

Applications include comparisons with experiments such as that of Schreckenbach, et al. (Schreckenbach 1981) and computations of energy deposition of fission products.

6. SOURCE AND SCOPE OF DATA

Electron spectra following decay of individual fission products (71 < A < 163) are obtained from the nuclear data file using a listed and documented computer subroutine. Data are given for more than 500 radionuclides created during or after thermal fission. The data include transition energies, absolute intensities, and shape parameters when known. An "average" beta-ray energy is given for fission products lacking experimental information on transition energies and intensities. For fission products having partial or incomplete decay information, the available data are utilized to provide best estimates of otherwise unknown decay schemes. The data file is from the evaluation of Dickens.

7. DISCUSSION OF THE DATA RETRIEVAL PROGRAM

BETASP, the PDP-10 Fortran IV program, is utilized to read up to eleven records of information from the file of data, and from these to compute both a beta-ray and an antineutrino spectrum. After reading the appropriate data records for the selected radionuclide proton number and isotope mass, the program calculates the total response, including forbidden shapes for up to 3d-forbidden unique and up to 2d-forbidden non-unique if known parameters are included in the data table. The results are in number-per-bin-width.

A sample main program is included to demonstrate the call to the BETASP routine to compute the beta-ray and antineutrino spectrum for ⁹⁰Y.

8. DATA FORMAT AND COMPUTERS

EBCDIC card images; BETASP format, PDP-10.

9. TYPICAL RUNNING TIME

It requires 0.55 cpu seconds to execute the program.

10. REFERENCES

a. Included in package:

J. K. Dickens, "Electron Spectra from Decay of Fission Products," ORNL/TM-8285 (September 1982).

J. K. Dickens, Phys. Rev. Lett. 46, 1061 (April 1981).

J. K. Dickens, Phys. Lett. B 113B, 201 (June 1982).

b. Background information:

K. Schreckenbach, H. R. Faust, F. von Feilitzsch, A. A. Hahn, K. Hawerkamp and J. L. Vuilleumier, Phys. Lett. 99B, 25 (1981).

11. CONTENTS OF LIBRARY

Included are the referenced documents (10.a) and one (1.2MB) DOS diskette which contains the data library, Fortran program, and output from sample problem.

12. DATE OF ABSTRACT

February 1983.