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Parity measurements of nuclear levels using a free-electron-laser generated gamma-ray beam.

PubMed
Authors: Pietralla N, Berant Z, Litvinenko VN, Hartman S, Mikhailov FF, Pinayev IV, Swift G, Ahmed MW, Kelley JH, Nelson SO, Prior R, Sabourov K, Tonchev AP, Weller HR

Year

2002

Paper ID

13151

Status

Peer-reviewed

Abstract Read

~2 min

Abstract Words

74

Citations

179

Abstract

The quality and intensity of gamma rays at the High Intensity gamma-ray Source are shown to make nuclear resonance fluorescence studies possible at a new level of precision and efficiency. First experiments have been carried out using an intense (10(7) gamma/s) beam of 100% linearly polarized, nearly monoenergetic, gamma rays on the semimagic nucleus (138)Ba. Negative parity quantum numbers have been assigned to 18 dipole excitations of (138)Ba between 5.5 MeV and 6.5 MeV from azimuthal gamma-intensity asymmetries.

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  • The quality and intensity of gamma rays at the High Intensity gamma-ray Source are shown to make nuclear resonance fluorescence studies possible at a new level of precision and...

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