Two-neutron emission in the absorption of stopped pions on lithium isotopes

B. Bassalleck; E. L. Haase; W. -D. Klotz; F. Takeutchi; H. Ullrich; M. Furic; Y. Sakamoto

doi:10.1103/PhysRevC.19.1893

Two-neutron emission in the absorption of stopped pions on lithium isotopes

B. Bassalleck, E. L. Haase, W. -D. Klotz, F. Takeutchi, H. Ullrich, M. Furic, and Y. Sakamoto

Phys. Rev. C 19, 1893 – Published 1 April 1979

Abstract

The ( $π^{-}$ , $2 n$ ) reaction on ${}^{6}{Li}$ and ${}^{7}{Li}$ nuclei has been studied in a kinematically complete experiment. Distributions of excitation energy of residual nuclei, of recoil momentum, and of angle spanned by relative and c.m. momenta of emitted neutrons have been extracted. The reaction mechanism has been investigated through a comparison with theoretical predictions.

NUCLEAR REACTIONS ( $π^{-}$ , $2 n$ ) on ${}^{6}{Li}$ and ${}^{7}{Li}$ , $E = 0$ measured rate ( $E n_{1}$ , $E n_{2}$ , $ω$ ); excitation spectra for residual nuclei deduced, recoil momentum distributions and correlations of relative and c. m. momenta of emitted neutrons extracted.

Received 12 January 1979

DOI:https://doi.org/10.1103/PhysRevC.19.1893

Authors & Affiliations

B. Bassalleck^*, E. L. Haase^†, W. -D. Klotz^‡, F. Takeutchi^§, and H. Ullrich

Kernforschungszentrum und Universität Karlsruhe, Institut für Experimentelle Kernphysik, Federal Republic of Germany and CERN, Geneva, Switzerland

M. Furic^∥

CERN, Geneva, Switzerland

Y. Sakamoto

Department of Physics, Kyoto Sangyo University, 603 Kyoto, Japan

^*Present address: Department of Physics/TRIUMF, University of British Columbia, Vancouver, B.C., Canada.
^†Present address: Institut für Angewandte Kernphysik, Kernforschungszentrum, Karlsruhe, Fed. Rep. Germany.
^‡Present address: Physikalisch Technische Bundesanstalt, Berlin, Fed. Rep. Germany.
^§Present address: Department of Physics, Carnegie Mellon University, Pittsburgh, Pennsylvania, U. S. A., on leave from Department of Physics, Kyoto Sangyo University, 603 Kyoto, Japan.
^∥On leave of absence from Institute R. Bos̆ković, Zagreb, Yugoslavia.

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Vol. 19, Iss. 5 — April 1979

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