Elastic Scattering of 300-MeV Negative Pions by Hydrogen

Sov.Phys.JETP 11 (1960) 323-326, 1960.

Abstract (data abstract)
THE FOLLOWING COMMENTS ARE TAKEN FROM THE PI N COMPILATION OF R.L. KELLY. THEY ARE THAT COMPILATION'S COMPLETE SET OF COMMENTS FOR PAPERS RELATED TO THE SAME EXPERIMENT (DESIGNATED VASILEVS60) AS THE CURRENT PAPER. (THE IDENTIFIER PRECEDING THE REFERENCE AND COMMENT FOR EACH PAPER IS FOR CROSS-REFERENCING WITHIN THESE COMMENTS ONLY AND DOES NOT NECESSARILY AGREE WITH THE SHORT CODE USED ELSEWHERE IN THE PRESENT COMPILATION.) /// VISHNYAK57 [V. V. VISHNYAK,SJ ATOMIC ENERGY 3,1103(1957).] -- DESCRIPTION OF THE TRIGGERED GEIGER COUNTERS USED IN VASILEVS60. /// PONTECOR59 [B. PONTECORVO,9TH IC ON HEP,KIEV,V 1,P 83,1959.] -- RAPPORTEUR TALK WITH DESCRIPTION OF THE APPARATUS USED BY VASILEV60B. /// VASILEV60A [I. M. VASILEVSKII,SOVIET PHYSICS JETP 11,323(1960).] -- UNVERIFIED DATA COPIED FROM GRAPH. PI- P DCS AT 417 MEV/C FROM 1K ELASTIC EVENTS AT JINR. BOTH SCATTERED PARTICLES DETECTED IN FOUR BANKS OF OPTICALLY RECORDED TRIGGERED GEIGER COUNTERS COVERING ANGLES BETWEEN 20 DEG AND 160 DEG IN THE LAB. PI-/P DISCRIMINATION WAS DONE BY RANGING OUT PROTONS IN CU BETWEEN THE 2ND AND 3RD BANKS. /// VASILEV60B [I. M. VASILEVSKII,SOVIET PHYSICS JETP 11,1185(1960).] -- PI- P POL AT 417 MEV/C. DONE AT JINR USING THE HODOSCOPE OF VASILEV60A WITH CU ABSORBER AND SOME GEIGER COUNTERS REMOVED AND A CARBON PLATE+GEIGER COUNTER HODOSCOPE ANALYZER. THESE ARE PRELIMINARY RESULTS SUPERCEEDED BY VASILEV64A AND VASILEVS66. /// VASILEV64A [I. M. VASILEVSKII,12TH IC ON HEP,DUBNA,V 1,P 35,1964.] -- PI- P POL AT 417 MEV/C FROM 2.2K ELASTIC EVENTS WITH RESCATTERED RECOIL PROTONS AT JINR. APPARENTLY USED THE SAME APPARATUS AS VASILEV60B EXCEPT THAT THE ANALYZER IS NOW A CARBON PLATE OPTICAL SPARK CHAMBER. /// VASILEV64B [I. M. VASILEVSKII,12TH IC ON HEP,DUBNA,V 1,P 37,1964.] -- PI N PWA AT 427 MEV/C INCLUDING DATA OF VASILEV64A. /// VASILEVS66 [I. M. VASILEVSKY,PL 23,174(1966).] -- PI- P POL AT 417 MEV/C FROM 5.2K ELASTIC EVENTS WITH RESCATTERED RECOIL PROTONS AT JINR. SAME APPARATUS AS VASILEV64A. COMBINED RESULTS OF VASILEV64A AND VASILEVS66 ARE TABULATED. /// COMMENTS ON MODIFICATIONS TO LOVELACE71 COMPILATION BY KELLY -- THE NES FOR VASILEV60A AND VASILEVS66 ARE RECORDED HERE AS UNKNOWN AND ZERO,RESPECTIVELY. LOVELACE71 HAS 5 PCT AND 9 PCT,RESPECTIVELY. WE REREAD THE GRAPH IN VASILEV60A AND AGREE WITH THE LOVELACE71 VERSION.

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