''LIFETIME'': a computer program for analyzing Doppler-shift recoil-distance nuclear lifetime data

Technical Report · Tue Oct 01 04:00:00 EDT 1985

DOI:https://doi.org/10.2172/6371400· OSTI ID:6371400

Wells, J. C.; Fewell, M. P.; Johnson, N. R.

The program LIFETIME is designed to extract lifetimes of nuclear levels from Doppler-shift recoil-distance experiments by performing a least-square fit to the experimental data (shifted and unshifted photopeak intensities and branching ratios). Initial populations of levels and transition rates between levels are treated as variable parameters. In terms of these parameters the population of each level as a function of time is determined by the Bateman equations, and the shifted and unshifted intensities are calculated. 19 refs., 5 figs. (WRF)

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6371400
• Report Number(s): ORNL/TM-9105; ON: DE86002903
• Country of Publication: United States
• Language: English

Related Subjects

651100* -- Nuclear Physics-- Experimental Techniques-- (1980-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CHARGE PLUNGER METHOD
COMPUTER CODES
COUNTING TECHNIQUES
DATA ANALYSIS
DOPPLER EFFECT
ENERGY LEVELS
EXCITED STATES
FORTRAN
GAMMA SPECTRA
L CODES
LEAST SQUARE FIT
LIFETIME
M CODES
MAXIMUM-LIKELIHOOD FIT
NUMERICAL SOLUTION
PROGRAMMING LANGUAGES
RECOILS
SPECTRA