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Identification of new neutron-rich rare-earth nuclei produced in /sup 252/Cf spontaneous fission

Conference ·
OSTI ID:6085697
; ; ;
A program of systematic study of the decay properties of neutron-rich rare-earth nuclei with 30 s < t/sub 1/2/ < 10 min, produced in /sup 252/Cf spontaneous fission, is currently underway using the Idaho ESOL (Elemental Separating On Line) Facility. The chemistry system used for the rare earth elemental separations consists of two high-performance chromatography columns connected in series and coupled to the /sup 252/Cf fission source via a helium gas-jet transport arrangement. The time delay for separation and initiation of ..gamma..-ray counting with this system is typically 2 to 3 min. Significant results which have been obtained to date with this system include the identification of a number of new neutron-rich rare-earth isotopes including /sup 155/Pm (t/sub 1/2/ = 48 +- 4 s) and /sup 163/Gd (t/sub 1/2/ = 68 +- 3 s), in addition to 5.51 min /sup 158/Sm which was identified in an earlier series of experiments.
Research Organization:
Idaho National Engineering Lab., Idaho Falls (USA)
DOE Contract Number:
AC07-76ID01570
OSTI ID:
6085697
Report Number(s):
EGG-M-02581; CONF-810649-14; ON: DE81028279
Country of Publication:
United States
Language:
English

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Related Subjects

651823 -- Nuclear Properties &amp; Reactions
A=150-189
Experimental-- Energy Levels &amp; Transitions-- (-1987)
652026* -- Nuclear Properties &amp; Reactions
A=220 &amp; above
Experimental-- Spontaneous &amp; Induced Fission-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDE ISOTOPES
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
BETA DECAY
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY
BETA-MINUS DECAY RADIOISOTOPES
CALIFORNIUM 252
CALIFORNIUM ISOTOPES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DECAY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXTRACTION CHROMATOGRAPHY
FISSION
FISSION PRODUCTS
GADOLINIUM 163
GADOLINIUM ISOTOPES
GAMMA SPECTRA
GAMMA SPECTROSCOPY
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
ISOTOPES
MATERIALS
MINUTES LIVING RADIOISOTOPES
NEUTRON-RICH ISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCLEI
PROMETHIUM 155
PROMETHIUM ISOTOPES
QUANTITATIVE CHEMICAL ANALYSIS
RADIOACTIVE MATERIALS
RADIOISOTOPES
RADIOMETRIC ANALYSIS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
REACTION PRODUCT TRANSPORT SYSTEMS
SECONDS LIVING RADIOISOTOPES
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
SPONTANEOUS FISSION
YEARS LIVING RADIOISOTOPES