/*===================================================================*/ /* NRDF D1609 Data No.2 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,2; D#=D1609; TITLE=/ Two-nucleon pion absorption in 4He at 1 GeV/c /; PURPOSE=/ The first measurment of two-nucleon pion absorption in 4he at1gev/c /; ATH=(T.NAGAE'1', T.FUKUDA'1', M.SEKIMOTO'1', T.MIYACHI'1', P.KITCHING'1', I.NOMURA'2', I.ARAI'3', K.TOMIZAWA'3', H.KITAYAMA'3', Y.NAGASAKA'3', S.UENO'3', K.WAKI'3', K.MAEDA'4', T.SUDA'4', H.MATSUYAMA'5', T.KOBAYASHI'6', D.ROWNTREE'7', M.A.PROHVATILOV'8', V.I.RASIN'8'); INST-ATH=(2JPNINS'1', 2JPNIPC'2', 2JPNTSU'3', 2JPNTOH'4', 2JPNTOH'5', 2JPNKEK'6', 1USAMIT'7', 4RUSJIA'8'); /* '3' Institute of Physics */ /* '4' College of General Education */ /* '5' Laboratory of Nuclear Science */ REF=PL/B; VLP=335(1994)330; RCTS=(4HE(PIP,P,P)X, 4HE(PIP,N,P)X); PHQS=ANGL-DSTRN; /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,2; /* 2003-10-02 : Converted, Nk + Am + On. Converted to EXFOR E1609 /* 2005-11-03 : Converted, On. Converted from EXFOR E1609 */ /* Related references - none, E1838001, J(Phys)149. PHQ=ANGL-DSTRN; CHM=ELM; PHYS-FORM=LIQD; THK-TGT=2800MG/CM**2; BAC=X'9'; /* '9' cylindrical container made of stainless steel */ THK-BAC=XMG/CM**2'10'; /* '10' a window thickness of 0.5 mm */ POL-TGT=0%; ALGN-TGT=0%; ACC=SYN'11'; /* '11' KEK 12GeV proton synchrotron */ INST-ACC=2JPNKEK; INC-MOM-LAB=1GEV/C; ERS-PRJ=1.5%; BEAM-INTNSTY=XPNA'12'; /* '12' 10**5 particles/spill */ POL-PRJ=0%; ION-SOURCE=/ Spallation /; ANT-COINC=NO; DET-SYS=(MAG'13',SCT'14',SCT'15',TOF); /* '13' Dipole magnet to analyze the momentum of the forward-scattered charged particles. Efficiency of the spectrometer was estimated to be 59+-3 % for high-momentum protons. */ /* '14' Nine plastic scintillators to identify forward-scattered charged particles (ToF wall). */ /* '15' Two ToF walls (NHA and HNB) to detect protons and neutrons. Detection efficiencies for neutron is 11+-1 % for 400 MeV/c to 950 MeV/c neutron, while 10+-1 % for neutrons with same momentum range. */ /* 2006-12-19 : Altered, At. Re-digitized */ RCT=4HE(PIP,N,P)X; RTY=X'18'; /* '18' pion absorption */ DET-PARTCL=(N,P); COINC=(P,N); /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,2; INC-MOM-LAB=1GEV/C; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTL DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA'19' (DEG) (UB/SR) (UB/SR) 4.498E+00 4.615E+02 +-1.335E+02 7.541E+00 2.644E+02 +-6.010E+01 1.054E+01 7.145E+01 +-1.991E+01 1.351E+01 6.783E+01 +-1.550E+01 1.650E+01 3.679E+01 +-1.064E+01 1.954E+01 2.449E+01 +-2.051E+01 2.251E+01 2.056E+01 +-9.738E+00 2.550E+01 9.336E+00 +-8.047E+00 2.854E+01 5.133E+00 +-9.964E+00 3.151E+01 6.317E+00 +-9.889E+00 3.450E+01 2.948E+00 +-1.066E+01 \END; /*===================================================================*/ |