ENTRY O0415 20201020 O081O041500000001 SUBENT O0415001 20201020 O081O041500100001 BIB 13 50 O041500100002 TITLE C-12(p,n+p)C-11 cross section at 7.6 GeV O041500100003 AUTHOR (G.W.Butler,S.B.Kaufman,E.P.Steinberg,B.D.Wilkins) O041500100004 REFERENCE (J,PR/C,6,1153,1972) O041500100005 INSTITUTE (1USAANL) O041500100006 FACILITY (SYNCH,1USAANL) The Argonne Zero Gradient Synchrotron. O041500100007 SAMPLE Targets used in this experiment consisted of O041500100008 cylindrical pilot b plastic scintillators 1/8 in. thickO041500100009 and 5/8 in. diam., containing 91.55% carbon by O041500100010 weight. O041500100011 For each irradiation a target was carefully aligned O041500100012 with and taped directly to the upstream side of O041500100013 scintillation counters, which was the same size as O041500100014 the target. O041500100015 Each one of the targets was irradiated in the proton O041500100016 beam for approximately 20 min. O041500100017 DETECTOR (TELES,SCIN,SCIN) A scintillation counter telescope. O041500100018 1/8-in. thick and either 5/8 or 1 in. diam. was O041500100019 optically coupled via a 6-in. -long by 1/8-in. -thick O041500100020 Lucite light pipe to a RCA-8575 photomultiplier. O041500100021 (NAICR) two NaI(Tl) well crystals O041500100022 METHOD (ACTIV) Starting about 10 min after the end of an O041500100023 irradiation, the c-11 activity was measured either by O041500100024 internal scintillation counting or by positron- O041500100025 annihilation radiation counting. O041500100026 (BCINT) O041500100027 (EXTB) Pi+ Mesons contamination of the beam was less O041500100028 than 4%. O041500100029 ANALYSIS (DECAY) Each decay curve was analyzed. O041500100030 ERR-ANALYS (ERR-T) The errors assigned to a measurement are made O041500100031 up of the standard deviation of the counting rate, O041500100032 the uncertainty in counting efficiency and O041500100033 (ERR-1) error in aligning the target with the counter O041500100034 telescope. O041500100035 (ERR-2) error 1.5% was assigned to represent the O041500100036 accuracy of the coincidence method of source O041500100037 calibration. O041500100038 CORRECTION /by Authors/. A secondary-effect correction was then O041500100039 calculated as a function of target thickness. O041500100040 After the target thickness correction was made, the O041500100041 cross section was then corrected for the pi+ O041500100042 contamination of the beam by using the C-12(pin,pin+n) O041500100043 cross section and assuming that the pi+ cross section O041500100044 is the same as the pi- cross section and the pion crossO041500100045 section is the same at 8.5 GeV/C. O041500100046 STATUS (TABLE) Tbl.I from Phys.Rev.,C6(1972)1153 O041500100047 HISTORY (19980311C) O041500100048 (19980316U) Last checking has been done. O041500100049 (20000426A) DATE is corrected O041500100050 (20201020A) SD: Correction in Subent 002. Cosmetic O041500100051 corrections in all Subents. O041500100052 ENDBIB 50 0 O041500100053 COMMON 2 3 O041500100054 ERR-1 ERR-2 O041500100055 PER-CENT PER-CENT O041500100056 1. 1.5 O041500100057 ENDCOMMON 3 0 O041500100058 ENDSUBENT 57 0 O041500199999 SUBENT O0415002 20201020 O081O041500200001 BIB 3 4 O041500200002 REACTION (6-C-12(P,X)6-C-11,,SIG) O041500200003 DECAY-DATA (6-C-11,20.4MIN) O041500200004 HISTORY (20201020A) SD: SF3=N+P -> X, SF5=IND deleted from O041500200005 REACTION code. ERR-ANALYS deleted (see Subent 001). O041500200006 ENDBIB 4 0 O041500200007 NOCOMMON 0 0 O041500200008 DATA 3 1 O041500200009 EN DATA ERR-T O041500200010 GEV MB MB O041500200011 7.6 28.2 0.6 O041500200012 ENDDATA 3 0 O041500200013 ENDSUBENT 12 0 O041500299999 ENDENTRY 2 0 O041599999999