{beta}-Decay Half-Lives of New Neutron-Rich Isotopes of Elements from Pm to Tb

Conference · Fri Dec 31 00:00:00 EST 1999

OSTI ID:784360

Ichikawa, S; Asai, M; Tsukada, K; Osa, A; Sakama, M; Kojima, Y; Shibata, M; Nishinaka, I; Nagame, Y; Oura, Y; Kawade, K

Eight 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. For six of these, each half-life was determined: {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 observed half-lives were compared with theoretical calculations. The recent calculation by the gross theory with the new one-particle strength function shows quite good agreement with the experimental half-lives.

• Research Organization: Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki (JP); Japan Atomic Energy Research Institute, Takasaki (JP); Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo (JP); Department of Energy Engineering and Science, Nagoya University, Nagoya (JP); Applied Nuclear Physics, Faculty of Engineering, Hiroshima University, Hiroshima (JP)
• Sponsoring Organization: none (US)
• OSTI ID: 784360
• Report Number(s): ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS; ISBN 1-56396-907-6; ISSN 0094-243X; CODEN APCPCS; TRN: US0108983
• Resource Relation: Conference: Experimental Nuclear Physics in Europe - ENPE 99: Facing the Next Millennium, Sevilla (ES), 06/21/1999--06/26/1999; Other Information: PBD: 31 Dec 1999
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
HALF-LIFE
NEUTRON-RICH ISOTOPES
RARE EARTHS
STRENGTH FUNCTIONS
PROMETHIUM ISOTOPES
SAMARIUM ISOTOPES
GADOLINIUM 165
TERBIUM 166
TERBIUM ISOTOPES
BETA-MINUS DECAY
PROMETHIUM 159
SAMARIUM 161
TERBIUM 167
TERBIUM 168
SAMARIUM 162
GADOLINIUM 166
Q-VALUE
RANDOM PHASE APPROXIMATION
DYSPROSIUM 166
DYPROSIUM 168
ENERGY LEVELS
SPIN
PARITY