THE DECAY OF Au$sup 19$$sup 4$

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Nuclear Physics

DOI:https://doi.org/10.1016/0029-5582(60)90358-8· OSTI ID:4143887

Backstrom, G; Bergman, O; Burde, J; Lindskog, J

The decay of Au/sup 194/ was investigated by the use of high resolution spectrometers for the measurements of the conversion spectrum and a double lens spectrometer for coincidence mesrurements. By careful analysis of the conversion spectrum, which was recorded at a resolution of approximately 0.2%, it was possible to identity more thsn 100 transitions in Pt/sup 194/. The use of strong sources and a double counter operated in coincidence made possible the detection of lines of intensity only 10/sup -5/ times that of the strongest line. Multipolarities could be found from K/L ratios for a few low energy transitions and some information could be extracted from a comparison with results of previous gamma ray work. Energies of the strongest lines were measured absolutely by means of an iron free double focusing instrument, and further energy determinations were made relatively to these lines. The standard error of the measurements was frequently as low as 2 parts in 10/sup 4/. A complete set of energy sums was computed in order to survey the possibilities of cascade- crossover combinations. The reliability of the numerical relationships was investigated statistically, and it was shown that a reasonably unique level scheme could be constructed on the basis of energies, although the positions of transitions remained to some extent ambiguous. The results of 79 coincidence experiments are reported, and when analyzed these data lead to a level scheme in agreement with the conclusions of the other approach. These experiments helped in deciding the location of transitions. Evidence for at least two 0/sup +/ states was found. The discovery of a level at 923 kev, probably of 4/sup +/ character, revealed a close analogy with the level scheme of Pt/sup 192/. The interpretation of this level as a three-phonon state is in agreement with theory. (auth)

• Research Organization: Inst. of Physics, Uppsala
• NSA Number: NSA-14-013259
• OSTI ID: 4143887
• Journal Information: Nuclear Physics, Journal Name: Nuclear Physics Vol. Vol: 15; ISSN 0029-5582
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BETA SPECTROMETERS
BRANCHING RATIO
COINCIDENCE METHODS
COUNTERS
DECAY
ENERGY LEVELS
ERRORS
GAMMA RADIATION
GOLD 194
INTERNAL CONVERSION
IRON
LENSES
MAGNETIC FIELDS
MEASURED VALUES
NUCLEAR MODELS
NUMERICALS
PARITY
PHYSICS
PLATINUM 192
PLATINUM 194
RADIATION SOURCES
RESOLUTION
SPECTRA
SPIN
STANDARDS
STATISTICS