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Title: Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds

Abstract

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.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
5348997
Report Number(s):
ORNL/NUREG-14
TRN: 78-001995
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 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)

Citation Formats

Dickens, J K, Emery, J F, Love, T A, McConnell, J W, Northcutt, K J, Peelle, R W, and Weaver, H. Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds. United States: N. p., 1977. Web. doi:10.2172/5348997.
Dickens, J K, Emery, J F, Love, T A, McConnell, J W, Northcutt, K J, Peelle, R W, & Weaver, H. Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds. United States. https://doi.org/10.2172/5348997
Dickens, J K, Emery, J F, Love, T A, McConnell, J W, Northcutt, K J, Peelle, R W, and Weaver, H. 1977. "Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds". United States. https://doi.org/10.2172/5348997. https://www.osti.gov/servlets/purl/5348997.
@article{osti_5348997,
title = {Fission-product energy release for times following thermal-neutron fission of /sup 235/U between 2 and 14000 seconds},
author = {Dickens, J K and Emery, J F and Love, T A and McConnell, J W and Northcutt, K J and Peelle, R W and Weaver, H},
abstractNote = {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.},
doi = {10.2172/5348997},
url = {https://www.osti.gov/biblio/5348997}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sat Oct 01 00:00:00 EDT 1977},
month = {Sat Oct 01 00:00:00 EDT 1977}
}