Beta-delayed neutron emission from93–100Rb to excited states in the residual Sr isotopes

Autor: Kratz, K. -L., Schröder, A., Ohm, H., Zendel, M., Gabelmann, H., Ziegert, W., Peuser, P., Jung, G., Pfeiffer, B., Wünsch, K. D., Wollnik, H., Ristori, C., Crançon, J.
Zdroj: Zeitschrift für Physik A Hadrons and Nuclei; September 1982, Vol. 306 Issue: 3 p239-257, 19p
Abstrakt: Beta-delayed neutron emission from the precursors93–100Rb to excited states in the residual nuclei92–99Sr has been measured by means of?-ray and neutron spectroscopy. In general, considerable neutron feeding of excited final states is observed. The experimental branching ratios (Pni) are compared to predictions from statistical model calculations. It is demonstrated that the main parameter affecting thePni-values is the shape of theß-strength function (Sß). For several Rb isotopes hindrance, respectively enhancement of neutron branches to specific final states is observed giving evidence for the persistence of intermediate structure of the neutron-emitting states. By the example of98Rb it is shown that a few integralß-delayed neutron properties may be sufficient to derive first estimates on the real shape ofSß above the neutron binding energy. This result is of importance for exotic nuclei where detailed spectroscopic investigations are precluded.
Databáze: Supplemental Index
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