Study of the 6Li(p, π+)7 Li reaction at 600 MeV

doi:10.1016/0370-2693(77)90838-3

Physics Letters B

Volume 69, Issue 4, 1977, Pages 433-436

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Abstract

The positive pion prodution through the ⁶Li(p, π⁺) reaction at 600 MeV has been studied using the high-resolution magnetic spectrometer SPES I. Differential cross sections have been measured from 5° to 35°_lab. The ⁶Li(p, π⁺) reaction feeds preferentially the 4.63 MeV $72^{−}$ level of ⁷Li. The results of a calculation based on two- and three-nucleon diagrams with π and ρ exchange between the projectile and a bound nucleon are also presented.

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Experimental data on (d, π⁻) reactions at 300 and 600 MeV incident energy are presented. Inclusive spectra on ⁶Li, ⁹Be and ¹⁰B targets near the kinematical limit do not show the usual scaling behaviour. For the two-body reaction ⁶Li (d, π⁻)⁸B the lowest-energy discrete states of the final nucleus were clearly resolved and the cross sections for pion production leading to those states have been determined.
Pion production in nuclei: Things known and unknown
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Proton-induced pion production at intermediate energies, leaving the final nucleus in discrete, resolved states, has been measured at the Saclay Synchrotron Saturne I, using the high resolution spectrometer facility SPES I. The (p, π⁺) reaction has been investigated on ⁹Be at proton energies of 410 and 605 MeV, and on ¹⁰B at incident energies of 320,410, 483 and 605 MeV. These data are presented and analysed in a coherent way, together with previous results at intermediate energies, by means of a pion exchange model. It is found that all the characteristic features of the data are reproduced satisfactorily.
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¹: Euratom fellow: present address: LAMPF, Los Alamos, USA.

²: Present address: Institut für Experimentalphysik, Hamburg, West Germany.

³: On leave of absence from Kyoto University. Present address: Kuyshu University, Fukuoka, Japan.

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Physics Letters B

Abstract

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Coherent pion production induced by 300 MeV and 600 MeV deuterons

Pion production in nuclei: Things known and unknown

The (p, π<sup>+</sup>) reaction on <sup>9</sup>Be and <sup>10</sup>B at intermediate energies and a coherent π-exchange analysis

A study of the <sup>6</sup>Li(p, pi <sup>+</sup>)<sup>7</sup>Li reaction close to threshold

Experimental evidence for the p<sup>6</sup>Li to eta <sup>7</sup>Be reaction at threshold