Nuclear excitation by electronic transition in {sup 189}Os

Journal Article · Mon May 01 04:00:00 EDT 2000 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.61.051304· OSTI ID:20216338

Ahmad, I ^[1]; Dunford, R W ^[1]; Esbensen, H ^[1]; Gemmell, D S ^[1]; Kanter, E P ^[1]; Ruett, U ^[1]; Southworth, S H ^[1]

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1. Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Monochromatic x rays have been used to explore the phenomenon of nuclear excitation by electronic transition (NEET) in the {sup 189}Os atomic/nuclear system. A new theoretical approach to calculating this process has also been developed and predicts a value for the ''NEET probability,'' P{sub NEET}, of 1.3x10{sup -10}. P{sub NEET} is the probability that a given atomic excitation (in this case a K vacancy), will result in the excitation of a specific nuclear state (in this case the 69.5-keV level in {sup 189}Os). This value is much lower than most of the calculated values given in the literature for this system. Our measurement gives the result P{sub NEET}<9x10{sup -10}, an upper limit which is several orders of magnitude lower than the values found in previous measurements, but which is consistent with the new calculation. (c) 2000 The American Physical Society.

• OSTI ID: 20216338
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 61; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
EXCITED STATES
EXPERIMENTAL DATA
NUCLEAR DECAY
OSMIUM 189
THEORETICAL DATA
TRANSITION AMPLITUDES
X-RAY SPECTRA