Ground-state and isomeric-state cross sections for the 138Ce(n,2n)137Ce reaction from its threshold to 20 MeV
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Junhua Luo
,
Li An
Abstract
The cross sections of the 138Ce(n, 2n)137m,gCe reactions and their isomeric cross section ratios σm/σg were measured at three neutron energies between 13.5 and 14.8 MeV using the activation technique. CeO2 samples and Nb monitor foils were activated together to determine the reaction cross section and the incident neutron flux. The monoenergetic neutron beams were formed via the 3H(d, n)4He reaction. The activities induced in the reaction products were measured using high-resolution γ-ray spectroscopy. The pure cross section of the ground-state was derived from the absolute cross section of the metastable state and the residual nuclear decay analysis. The cross sections were also estimated using the nuclear model code, TALYS-1.6 with different level density options at neutron energies varying from the reaction threshold to 20 MeV. Results are discussed and compared with the corresponding literature data.
Acknowledgement
We would like to thank the Intense Neutron Generator group at Chinese Academy of Engineering Physics for performing the irradiations.
This work was supported by the National Natural Science Foundation of China (Grant No. 11165007), by the Key Project of Chinese Ministry of Education (No. 211184).
©2015 Walter de Gruyter Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Ground-state and isomeric-state cross sections for the 138Ce(n,2n)137Ce reaction from its threshold to 20 MeV
- Determination of the 151Sm half-life
- Kinetics of reductive stripping of Np(VI) by acetohydroxamic acid from 30%TBP/kerosene to nitrate medium using a high-speed stirred cell
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Artikel in diesem Heft
- Frontmatter
- Ground-state and isomeric-state cross sections for the 138Ce(n,2n)137Ce reaction from its threshold to 20 MeV
- Determination of the 151Sm half-life
- Kinetics of reductive stripping of Np(VI) by acetohydroxamic acid from 30%TBP/kerosene to nitrate medium using a high-speed stirred cell
- Characteristic and mechanism of Th4+ sorption from nitric acid solutions by rice and wheat bran
- Kinetics of ion flotation of Co(II)–EDTA complexes from aqueous solutions
- Preparation and biodistribution assessment of 111In-BPAMD as a novel agent for bone SPECT imaging
- Iodine-125 Chitosan-Vitamin C Complex: preparation, characterization and application
- Neutron activation analysis of polyethylene from neutron shield of EDELWEISS experiment
