Identification of /sup 147/Cs and half-life determinations for Cs and Ba isotopes with A = 144--147 and Rb and Sr isotopes with A = 96--98

Journal Article · Thu Jun 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.17.2185· OSTI ID:6776796

Wohn, F K; Wuensch, K D; Wollnik, H; Decker, R; Jung, G; Koglin, E; Siegert, G

Half-life determinations of Rb and Cs fission products available at an on-line mass separator have been made for several neutron-rich Rb, Sr, Cs, and Ba isotopes using both ..beta..-multiscale and ..gamma..-multispectra measurements. The half-lives and rms uncertainties (in sec) are /sup 96/Rb, 0.203 +- 0.004; /sup 96/Sr, 1.015 +- 0.019; /sup 97/Rb, 0.170 +- 0.002; /sup 97/Sr, 0.441 +- 0.015; /sup 98/Rb, 0.108 +- 0.005; /sup 98/Sr, 0.66 +- 0.07; /sup 144/Cs, 1.02 +- 0.04; /sup 144/Ba, 12.3 +- 0.4; /sup 145/Cs, 0.590 +- 0.020; /sup 145/Ba, 4.31 +- 0.16; /sup 146/Cs, 0.305 +- 0.010; /sup 146/Ba, 2.18 +- 0.11; /sup 147/Cs, 0.218 +- 0.009; /sup 147/Ba, 0.70 +- 0.06. This work provides an unambiguous identification of the new neutron-rich isotope /sup 147/Cs. The half-life values are compared with predictions of the gross theory of ..beta.. decay and an apparent shell effect at N = 58 on the half-lives of neutron-rich isotopes of Kr, Rb, Sr, Y, and Zr is discussed.

• Research Organization: Ames Laboratory-USDOE and Department of Physics, Iowa State University, Ames, Iowa 50011
• OSTI ID: 6776796
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 17:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651722* -- Nuclear Properties & Reactions
A=90-149
Experimental-- Radioactive Decay-- (-1987)
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A=220 & above
Experimental-- Spontaneous & Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BARIUM ISOTOPES
BARYON REACTIONS
BASIC INTERACTIONS
BETA DECAY
BETA-MINUS DECAY
CESIUM ISOTOPES
DECAY
FISSION
FISSION PRODUCTS
GAMMA SPECTRA
HADRON REACTIONS
HALF-LIFE
INTERACTIONS
ISOTOPES
LEPTONIC DECAY
MATHEMATICAL MODELS
NEUTRON REACTIONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTICLE DECAY
RADIOACTIVE MATERIALS
RUBIDIUM ISOTOPES
SHELL MODELS
SPECTRA
STRONTIUM ISOTOPES
TARGETS
URANIUM 235 TARGET
WEAK INTERACTIONS
WEAK PARTICLE DECAY