Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds
Fission-product decay energy-releases rates were measured for thermal-neutron fission of /sup 235/U. Samples of mass 1 to 10 ..mu..g were irradiated for 1 to 100 sec by use of the fast pneumatic-tube facility at the Oak Ridge Research Reactor. The resulting beta- and gamma-ray emissions were counted for times-after-fission between 2 and 14,000 seconds. The data were obtained for beta and gamma rays separately as spectral distributions, N(E/sub ..gamma../) vs E/sub ..gamma../ and N(E/sub beta/) vs E/sub ..beta../. For the gamma-ray data the spectra were obtained by using a NaI detector, while for the beta-ray data the spectra were obtained by using an NE-110 detector with an anticoincidence mantle. The raw data were unfolded to provide spectral distributions of modest resolution. These were integrated over E/sub ..gamma../ and E/sub ..beta../ to provide total yield and energy integrals as a function of time after fission. Results are low compared to the present 1973 ANS Decay-heat standard. A complete description of the experimental apparatus and data-reduction techniques is presented. The final integral data are given in tabular and graphical form and are compared with published data. 41 figures, 13 tables.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 5348997
- Report Number(s):
- ORNL/NUREG-14; TRN: 78-001995
- Country of Publication:
- United States
- Language:
- English
Similar Records
Delayed beta- and gamma-ray production due to thermal-neutron fission of /sup 235/U, spectral distributions for times after fission between 2 and 14,000 sec: tabular and graphical data
Fission-product energy release for times following thermal-neutron fission of /sup 241/Pu between 2 and 14,000 seconds
Related Subjects
FISSION PRODUCTS
AFTER-HEAT
BETA DECAY
NEUTRON REACTIONS
THERMAL FISSION
URANIUM 235 TARGET
BETA SPECTRA
FISSION YIELD
GAMMA SPECTRA
THERMAL NEUTRONS
BARYON REACTIONS
BARYONS
BASIC INTERACTIONS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FISSION
HADRON REACTIONS
HADRONS
INTERACTIONS
ISOTOPES
LEPTONIC DECAY
NEUTRONS
NUCLEAR REACTION YIELD
NUCLEAR REACTIONS
NUCLEON REACTIONS
NUCLEONS
PARTICLE DECAY
RADIOACTIVE MATERIALS
SPECTRA
TARGETS
WEAK INTERACTIONS
YIELDS
652026* - Nuclear Properties & Reactions
A=220 & above
Experimental- Spontaneous & Induced Fission- (-1987)
651722 - Nuclear Properties & Reactions
A=90-149
Experimental- Radioactive Decay- (-1987)