The decay of 147Nd

Hill, J. C.; Wiedenbeck, M. L.

doi:10.1016/0375-9474(67)90102-9

Cited by 18 publications

(3 citation statements)

References 17 publications

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“…Relative gamma intensities were determined from full-energy peaks observed using the Ge(Li) detector. The intcnsity and its error were determined by methods used in earlier work 19). The efficiency as a function of energy has been determined for our detector by Donnelly et al 2o).…”

Section: Gamma-ray Intensifiesmentioning

confidence: 99%

The decay of 159Gd

Hill¹,

Wiedenbeck²

1968

Nuclear Physics A

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Precision energy measurements on four gamma rays in the l~gGd -> ls~I'b decay were performed with a 2 m curved-crystal spectrometer. Energies of the other gamma rays and all gamma intensities were determined with a Ge(Li) spectrometer. A level scheme is proposed for X~aTb which includes a level at 854 keV. The status of the 617 keV doublet has been clarified. On the basis of these measurements a proposal is made concerning the nature of the 854 keV level.El RADIOACTIVITY ~SaGd [from ~SSGd(n,;,)]; measured E~, I r, ;r/-coin. [ l~Fb deduced levels, J, n, logfi'. Enriched target, Ge(Li) detector. I 1. IntroductionThe levels of t59Tb have been studied extensively through the decay of 159Gd [refs. 1-4)], 159Dy [refs. 5-7)] and through Coulomb excitation 8-11). Properties of the levels of 159Tb have been used to test various models for odd-mass deformed nuclei. Two investigators 12,13) have given rather complete decay schemes for 159Gd ' but the status of a level at 860 keV and a gamma ray doublet at 617 keV is unclear. The only work carried out with lithium-drifted germanium spectrometers was by Ewan and Tavendale 14), who observed a gamma ray at 334 keV which has not been seen by other investigators. This investigation was undertaken to clarify the above problems and construct a decay scheme based on measurements with a high-resolution curved-crystal spectrometer and Ge(Li) spectrometers. Gamma-gamma coincidences were studied with the aid of Ge(Li) spectrometers. The observed bands are discussed in some detail. Source preparationSamples of Gd 2 0 3 enriched to 97.6 % in 15aGd were irradiated with thermal neutrons from the University of Michigan Ford Reactor. Flat (ribbon) sources composed of a Gd203-epoxy mixture were exposed to a flux of 2 × l0 ta n/cm 2 • sec for about 48 h. These sources were used in the 2 m curved-crystal spectrometer. Sources for use with the Ge(Li) spectrometer were composed of several rag of Gd 20 3 dissolved in HNO 3 and irradiated in the reactor for about 36 h. Samples used with the Ge(Li) spectrometer were chemically purified after irradiation. The rare-earths were t Work supported in part by the U.S. Atomic Energy Commission.

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Section: Gamma-ray Intensifiesmentioning

confidence: 99%

The decay of 159Gd

Hill¹,

Wiedenbeck²

1968

Nuclear Physics A

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“…The spectrum was calibrated using the four 159Gd gamma rays measured with the curved-crystal spectrometer along with standard is) gamma rays from 139Ce ' 7Be ' 137Cs and S4Mn. The energies and errors of all gamma rays were determined as in earlier work 19) and are given in table 1.…”

Section: Source Preparationmentioning

confidence: 99%

“…Relative gamma intensities were determined from full-energy peaks observed using the Ge(Li) detector. The intensity and its error were determined by methods used in earlier work 19). The efficiency as a function of energy has been determined for our detector by Donnelly et al 20).…”

Section: Gamma-ray Intensitiesmentioning

confidence: 99%

The decay of Gd

Hill¹,

Wiedenbeck²

1968

Nuclear Physics A

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Precision energy measurements on four gamma rays in the :SgGd -~ ~SaTb decay were performed with a 2 m curved-crystal spectrometer. Energies of the other gamma rays and all gamma intensities were determined with a Ge(Li) spectrometer. A level scheme is proposed for :6°Tb which includes a level at 854 keV. The status of the 617 keV doublet has been clarified. On the basis of these measurements a proposal is made concerning the nature of the 854 keV level.

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Literaturverzeichnis

Dick

1972

Respiratorischer Flüssigkeits- Und Wärmeverlust Des Säuglings Und Kleinkindes Bei Künstlicher Beatmung

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The decay of 147Nd

Cited by 18 publications

References 17 publications

The decay of 159Gd

The decay of 159Gd

The decay of Gd

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