{beta}-decay half-lives of new neutron-rich lanthanide isotopes

Journal Article · Mon Dec 21 00:00:00 EST 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.57256· OSTI ID:21207812

Ichikawa, S; Tsukada, K; Asai, M; Nishinaka, I; Nagame, Y ^[1]; Osa, A ^[2]; Sakama, M; Oura, Y ^[3]; Kojima, Y; Shibata, M; Kawade, K ^[4]

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1. Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki 319-1195 (Japan)
2. Japan Atomic Energy Research Institute, Takasaki 370-1292 (Japan)
3. Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0364 (Japan)
4. Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8603 (Japan)

New neutron-rich lanthanide isotopes produced in the proton-induced fission of {sup 238}U have been identified using the JAERI on-line isotope separator (JAERI-ISOL) coupled to a gas-jet transport system. The observed K x-rays following the {beta}{sup -}decay of products in the mass separated fraction provided direct isotopic identifications. New isotopes observed, with values of their half-lives given in parentheses, are {sup 159}Pm(2{+-}1 s), {sup 161}Sm(4.8{+-}0.8 s), {sup 165}Gd(10.3{+-}1.6 s), {sup 166}Tb(21{+-}6 s), {sup 167}Tb(19.4{+-}2.7 s) and {sup 168}Tb(8.2{+-}1.3 s). The half-life values are compared to the results of theoretical predictions.

• OSTI ID: 21207812
• Journal Information: AIP Conference Proceedings, Vol. 455, Issue 1; Conference: ENAM 98: 2. international conference on exotic nuclei and atomic masses, Bellaire, MI (United States), 23-27 Jun 1998; Other Information: DOI: 10.1063/1.57256; (c) 1998 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY
FISSION
FISSION FRAGMENTS
GADOLINIUM 165
HALF-LIFE
ISOTOPE SEPARATORS
JAERI
MASS SPECTROSCOPY
NEUTRON-DEFICIENT ISOTOPES
NEUTRONS
PROMETHIUM 159
PROTON REACTIONS
PROTON-NUCLEON INTERACTIONS
SAMARIUM 161
TERBIUM 166
TERBIUM 167
TERBIUM 168
URANIUM 238 TARGET