/*===================================================================*/
 /* NRDF D1609 Data No.1                                              */
 /*===================================================================*/
 /* Bibliography                                                      */
 /*===================================================================*/
 \\BIB,1;
 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,1;
 /* 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,P,P)X;
 RTY=X'16';
 /* '16' pion absorption */
 DET-PARTCL=P;
 COINC=(P,P);
 /*===================================================================*/
 /* Descriptive Parameters                                            */
 /*===================================================================*/
 \\DATA,1;
 INC-MOM-LAB=1GEV/C;
 /*===================================================================*/
 /* Data Table                                                        */
 /*===================================================================*/
 \DATA;
 THTL DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA'17'
 (DEG) (UB/SR) (UB/SR)
 4.555E+00 5.512E+02 +-NEGLIGIBLE
 7.531E+00 4.756E+02 +-NEGLIGIBLE
 1.052E+01 1.936E+02 +-NEGLIGIBLE
 1.350E+01 1.740E+02 +-NEGLIGIBLE
 1.653E+01 1.894E+02 +-3.069E+01
 1.951E+01 1.368E+02 +-NEGLIGIBLE
 2.249E+01 9.108E+01 +-NEGLIGIBLE
 2.547E+01 6.856E+01 +-1.115E+01
 2.856E+01 8.671E+01 +-NEGLIGIBLE
 3.153E+01 9.831E+01 +-NEGLIGIBLE
 3.451E+01 6.817E+01 +-NEGLIGIBLE
 \END;
 /*===================================================================*/