/*===================================================================*/
 /* NRDF D1765 Data No.8                                              */
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 /* Bibliography                                                      */
 /*===================================================================*/
 \\BIB,8;
 D#=D1765;
 TITLE=/Measurement of neutron-production double-differential cross
        sections for intermediate energy pion incident reaction/;
 PURPOSE=/To measure the neutron-production double-differential cross
          section for 870-MeV (momentum of 1.0-GeV/c) pi+ and pi- and
          2.1-GeV (that of 2.25-GeV/c) pi+ mesons incident on iron and
          lead targets at the pi2 beam line of the 12GeV proton
          synchrotron at High Energy Accelerator Research Organization
          (KEK)./;
 ATH=(Y.IWAMOTO'1', N.SHIGYO'1', H.KITSUKI'1', H.TENZOU'1',
      S.ISHIMOTO'1', K.MAEHATA'1', K.ISHIBASHI'1', T.NAKAMOTO'2',
      M.NUMAJIRI'2', S.MEIGO'3', H.TAKADA'3');
 INST-ATH=(2JPNKYU'1', 2JPNKEK'2', 2JPNJAE'3');
      /* '1' Department of Applied Quantum Physics and Nuclear
            Engineering */
 REF=(NST'4', PR/C'5');
 VLP=(38(2001)363'4', 70(2004)024602'5');
 /* '5' Y.Iwamoto+, Analysis with in-medium nucleon-nucleon elastic
        cross section */
 RCTS=(FE(PIP,N)X, FE(PIN,N)X, PB(PIP,N)X, PB(PIN,N)X);
 PHQS=ENGY-SPEC;
 /*===================================================================*/
 /* Experimental Conditions                                           */
 /*===================================================================*/
 \\EXP,8;
 /* 2004-10-13 : Converted, Converted from EXFOR E1765 */
 /* 2002-11-19 : Compiled */
 RTY=SPAL;
 PHQ=ENGY-SPEC;
 ENR=NAT;
 CHM=ELM;
 PHYS-FORM=SLD;
 BAC=X;
 POL-TGT=0%;
 ALGN-TGT=0%;
 ACC=SYN'6';
 /* '6' The pi-2 beam line of KEK */
 INST-ACC=2JPNKEK;
 ERS-PRJ=XKEV'7';
 /* '7' The momentum resolution of the secondary beam is about 1 %
 BEAM-INTNSTY=XMA'8';
 /* '8' 10**5 particles/2.5 s */
 POL-PRJ=0%;
 ION-SOURCE=/ Incident particles were generated as a secondary beam
              from an internal target mounted in the accelertor
              ring.For the positive beam incidence, the Time-of-Flight
              of incident particles was measured for separating pi+
              mesons from other particles by the use of a pair of Pilot
              U scintillators.Cerenkov counter was set up at the beam
              line to distinguish pi+ and mu+ particles. /;
 DET-PARTCL=N;
 COINC=NO;
 ANT-COINC=NO;
 DET-SYS=(SCT'9',SCT'10',TOF);
 /* '9' NE213 liquid scintillators of 12.7 cm in diameter and 12.7
        cm thick were placed in directions of 15 degree, 30 degree, 60
        degree, 90 degree, 120 degree for the neutron TOF measurements
 /* '10' NE102A plastic scintillators of 1 cm thick were mounted
         as veto detectors to eliminate charged-particle enents by the
         anticoincidence method */
 EFCN-DET=/ The neutron detection efficiencies were obtained by
            calculation results obtained from the SCINFUL (J.K.Dickens,
            SCINFUL: A monte Carlo Based Computer Program to Determine
            a Scintillator Full Energy Response to Neutron Detection
            for En between 0.1 and 80MeV: User's Manual and Fortran
            Program Listing, ORNL-6462,(1988).) and the
            CECIL(R.A.Cecil, et al., Nucl. Instrum. Methods., 161,
            439(1979).) codes. Calculated results of the neutron
            detection efficiencies for the four threshold levels are
            plotted in Fig. 6, p366 in reference. /;
 /* Experimental Method:
    - Time-of-flight
 RCT=FE(PIN,N)X;
 THK-TGT=XMG/CM**2'18';
 /* '18' 4.9cm in diameter and 3.0cm thick */
 INC-ENGY-LAB=870MEV;
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 /* Descriptive Parameters                                            */
 /*===================================================================*/
 \\DATA,8;
 INC-ENGY-LAB=870MEV;
 EMT=N;
 THTL=30DEG;
 /*===================================================================*/
 /* Data Table                                                        */
 /*===================================================================*/
 \DATA;
 ENGY-EMT-LAB DSIGMA/DOMEGA/DE DELTA-DSIGMA/DOMEGA/DE
 (MEV) (MB/SR/MEV) (MB/SR/MEV)
 1.25	30.2	7.4731
 1.75	23.3	5.7995
 2.5	19	4.7074
 3.5	12.322	2.8669
 4.5	10.468	2.4293
 5.5	9.5983	2.2299
 7	6.7197	1.548
 9	5.0516	1.1779
 12.5	3.1997	0.73844
 17.5	2.0646	0.4869
 22.5	1.9581	0.47034
 27.5	1.4844	0.36699
 35	1.3608	0.32399
 45	1.1016	0.26872
 55	0.99374	0.2466
 65	1.169	0.28835
 75	1.0767	0.2744
 90	0.72777	0.18825
 125	0.52262	0.1308
 175	0.24883	0.068023
 250	0.18402	0.047522
 350	0.14239	0.036585
 450	0.072778	0.020144
 550	0.026586	0.0094381
 650	0.024282	0.0073946
 \END;
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