Photoproduction of positive pions at 180 degrees from 0.22 to 3.1 gev

Phys.Rev.Lett. 27 (1971) 1244-1247, 1971.

Abstract (data abstract)
THE PIONS WERE MOMENTUM ANALYZED AND DETECTED IN A COUNTER TELESCOPE. SYSTEMATICS,SYSN=D(SIG)/DOMEGA.