Published November 2001
| Version v1
Journal article
A radiochemical study for the α-decay of 229mTh
Creators
- 1. Tohoku Univ., Institute for Materials Research, Oarai, Ibaraki (Japan)
- 2. Tohoku Univ., Laboratory of Nuclear Science, Sendai, Miyagi (Japan)
- 3. Kyoto Univ., Research Reactor Inst., Kumatori, Osaka (Japan)
- 4. Osaka Univ., Graduate School of Science, Toyonaka, Osaka (Japan)
- 5. Kanazawa Univ., Graduate School of Science, Kanazawa, Ishikawa (Japan)
Description
The decay of low energy isomeric state of 229Th was explored applying a novel radiochemical technique to the (γ, xn) reaction products on 230Th target. The decaying α-emitter was observed between 4.687 MeV α-peak of 230Th and the α-peaks of the (γ, 2n) product 228Th. The energy of the decaying component is consistent with the expected energy for the α-particles from 229mTh. The half-life of the decaying component was determined to be 13.9±3 hours. It seems that the present determination of the half-life is the longest value for 229mTh, because fluoride has no valence electrons that undergo electronic bridge interaction with the thorium nucleus. (author)
Additional details
Publishing Information
- Journal Title
- Kakuriken Kenkyu Hokoku
- Journal Volume
- 34
- Journal Page Range
- p. 39-43
- ISSN
- 0385-2105
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 33022017
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ALPHA SPECTRA; EXPERIMENTAL DATA; HALF-LIFE; ISOMERIC NUCLEI; MEV RANGE 10-100; NUCLEAR REACTION YIELD; PHOTONUCLEAR REACTIONS; THORIUM 229; THORIUM 230 TARGET
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; DATA; ENERGY RANGE; EVEN-ODD NUCLEI; HEAVY NUCLEI; INFORMATION; ISOTOPES; MEV RANGE; NUCLEAR REACTIONS; NUCLEI; NUMERICAL DATA; RADIOISOTOPES; SPECTRA; TARGETS; THORIUM ISOTOPES; YEARS LIVING RADIOISOTOPES; YIELDS
Optional Information
- Notes
- 9 refs., 3 figs., 2 tabs.