Elsevier

Nuclear Physics A

Volume 258, Issue 3, 1 March 1976, Pages 480-512
Nuclear Physics A

The absorption of π at rest on complex nuclei

https://doi.org/10.1016/0375-9474(76)90486-3Get rights and content

Abstract

The energy, width and intensity of prompt nuclear γ-rays following capture of π at rest by 9Be, 10B, 16O, 19F, 31P, Ca and 93Nb were measured with a Ge(Li) detector. In most cases it was possible to identify the final nucleus from the energy of the observed γ-ray. Using the measured Doppler broadening of γ-rays from short-lived states, the vector sum momentum distribution of the emitted nucleons was calculated. From the measured γ-ray intensities, isotopic yields were deduced corresponding to the removal of from 1 to 12 nucleons. The average number of removed nucleons changes from 3.0 to 5.5 as the target varies from 16O to 40Ca. A comparison was made with data from both spallation reactions and multi-nucleon pickup reactions.

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    Work supported in part by the Bundesministerium für Forschung und Technologie of the Federal Republic of Germany.

    ††

    Present address: US EPA, Research Triangle Park, North Carolina 2771, USA.

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