/*===================================================================*/ /* NRDF D1617 Data No.3 */ /*===================================================================*/ /* Bibliography */ /*===================================================================*/ \\BIB,3; 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,3; /* 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=(12C(ANTIP,ANTIN)X/1H(ANTIP,ANTIN)N); ANL=GLAUBER; /*===================================================================*/ /* Descriptive Parameters */ /*===================================================================*/ \\DATA,3; INC-MOM-LAB=590MEV/C; DELTA-INC-MOM-LAB=0.5%; SYS-ERR=8.5%'8'; /* '8' Total systematic error */ EMT=ANTIN; /*===================================================================*/ /* Data Table */ /*===================================================================*/ \DATA; THTL DSIGMA/DOMEGA-RATIO'9' DELTA-DSIGMA/DOMEGA-RATIO'9,10' (DEG) (NODIM) (NODIM) 2.8 0.82 +-0.10 6.5 0.97 +-0.12 10.2 1.07 +-0.11 13.8 0.92 +-0.13 17.4 0.87 +-0.11 20.9 0.90 +-0.14 24.4 0.58 +-0.13 27.8 0.77 +-0.14 31.3 0.55 +-0.16 34.7 0.80 +-0.22 38.8 1.16 +-0.25 43.2 0.93 +-0.35 48.2 1.22 +-0.46 \END; /*===================================================================*/ |