/*===================================================================*/ /* NRDF D1617 Data No.2 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,2; D#=D1617; TITLE=/ Reaction p-bar + 12C to n-bar + X at 590 MeV/c /; PURPOSE=/ To report the first observation of antineutron production from a complex nucleus struck by antiproton's /; ATH=(K.NAKAMURA'1', T.FUJII'1', T.KAGEYAMA'1', F.SAI'1', S.SAKAMOTO'1', S.SATO'1', T.TAKAHASHI'1', T.TANIMORI'1', S.S.YAMAMOTO'1', Y.TAKADA'2'); INST-ATH=(2JPNTOK'1', 2JPNTSU'2'); /* '1' Department of Physics */ /* '2' Institute of Applied Physics */ REF=PR/C; VLP=31(1985)1853; RCTS=(12C(ANTIP,ANTIN)X, 1H(ANTIP,ANTIN)N); PHQS=ANGL-DSTRN; /*===================================================================*/ /* Experimental Conditions */ /*===================================================================*/ \\EXP,2; /* 2005-11-02 : Converted, Am + On. Converted to EXFOR E1617 */ PHQ=ANGL-DSTRN; CHM=ELM; PHYS-FORM=SLD; THK-TGT=1806+-6MG/CM**2; POL-TGT=0%; ALGN-TGT=0%; ACC=SYN; INST-ACC=2JPNKEK; INC-MOM-LAB=590MEV/C; DELTA-INC-MOM-LAB=0.5%; ERS-PRJ=2.5%; BEAM-INTNSTY=80PPS; POL-PRJ=0%; DET-PARTCL=ANTIN; COINC=NO; ANT-COINC=NO; DET-SYS=SCT'3'; /* '3' To detect anti-neutron */ /* By author: anti-neutron detection efficiencies are nearly energy independent, i.e. observed angular distribution is considered to give dsigma/dOmega to a good approximation. */ RCT=1H(ANTIP,ANTIN)N; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,2; INC-MOM-LAB=590MEV/C; DELTA-INC-MOM-LAB=0.5%; SYS-ERR=8.5%'6'; /* '6' Total systematic error */ EMT=ANTIN; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTL DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA'7' (DEG) (MB/SR) (MB/SR) 2.8 15.00 +-0.30 6.5 12.09 +-0.26 10.2 11.67 +-0.26 13.8 10.85 +-0.26 17.4 10.60 +-0.26 20.9 9.04 +-0.24 24.4 8.84 +-0.25 27.8 7.31 +-0.23 31.3 5.80 +-0.21 34.7 3.94 +-0.16 38.8 2.81 +-0.13 43.2 1.55 +-0.10 48.2 0.95 +-0.07 53.7 0.29 +-0.04 59.6 0.15 +-0.04 \END; /*===================================================================*/ |