Published October 1999
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Identification of new neutron-rich lanthanoid isotopes
- 1. Advanced Science Research Center, Japan Atomic Energy Research Institute, Tokai, Ibaraki (Japan)
Description
Six new neutron-rich lanthanoid isotopes produced in the proton-induced fission of 238U were identified with the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. The observed K x-ray following the β- - decay of products in the mass-separated fraction provided direct identification of isotope. New isotopes observed, with values of their half-lives given in parentheses, are 159Pm (2 ± 1 s), 161Sm (4.8 ± 0.8 s), 165Gd (10.3 ± 1.6 s), 166Tb (21 ± 6 s), 167tb (19.4 ± 2.7 s) and 168Tb (8.2 ± 1.3 s). Furthermore, the level energies of first 2+ and 4+ states of the daughter nuclides 166Dy and 168 were derived through the β- - decay studies of 166Tb and 168Tb. (author)
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Additional details
Publishing Information
- Imprint Title
- Proceedings of the symposium on the joint research program between JAERI and Universities. Current status and future perspectives of the chemistry research in the nuclear fuel cycle back end field
- Imprint Pagination
- 106 p.
- Journal Page Range
- p. 4-11
- Report number
- JAERI-Conf--99-010
Conference
- Title
- Symposium on the joint research program between JAERI and Universities
- Dates
- 27 Jan 1999
- Place
- Tokyo (Japan)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 31017661
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- AEROSOL GENERATORS; DYSPROSIUM 166; DYSPROSIUM 168; FISSION FRAGMENTS; GADOLINIUM ISOTOPES; ISOTOPE SEPARATORS; JAERI TANDEM ACCELERATOR; NEUTRON-RICH ISOTOPES; ON-LINE MEASUREMENT SYSTEMS; PROMETHIUM ISOTOPES; PROTON BEAMS; SAMARIUM ISOTOPES; TERBIUM ISOTOPES; X-RAY EMISSION ANALYSIS; X-RAY SPECTROSCOPY
- Descriptors DEC
- ACCELERATORS; BEAMS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHEMICAL ANALYSIS; DAYS LIVING RADIOISOTOPES; DYSPROSIUM ISOTOPES; ELECTROSTATIC ACCELERATORS; EQUIPMENT; EVEN-EVEN NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; MINUTES LIVING RADIOISOTOPES; NONDESTRUCTIVE ANALYSIS; NUCLEAR FRAGMENTS; NUCLEI; NUCLEON BEAMS; ON-LINE SYSTEMS; PARTICLE BEAMS; RADIOISOTOPES; RARE EARTH NUCLEI; SEPARATION EQUIPMENT; SPECTROSCOPY; TANDEM ELECTROSTATIC ACCELERATORS; VAN DE GRAAFF ACCELERATORS