/* 2002-03-18 N.OTUKA : 10 POINTS CHECK */ /* 2002-09-28 N.OTUKA : PUT '\END;' AT DATA 5 */ /* 2004-07-28 N.OTUKA : Three tables are combined for Data 1-4. */ /* 2006-02-23 N.OTUKA : \\EXP,5[8: -> \\EXP,5[8; */ \\BIB,1[8; D#=D604; TITLE=/DIFFERENTIAL CROSS SECTION AND ANALYZING POWER FOR BACKWARD PIONS IN 2H(P,PI+)3H/; PURPOSE=/A CHECK OF THE ANGULAR AND ENERGY DEPENDENCE OF THE BACKWARD PION PRODUCTION CROSS SECTION FOR THE TWO-BODY (PD--->TPI) REACTION; IN PARTICULAR TO CLARIFY THE POSSIBLE EXISTENCE OF A BACKWARD PEAK PREVIOUSLY REPORTE D BY DOLLHOPF ET AL. NUCL. PHYS. A217(1973)381./; ATH=(E.G.AULD'1',R.R.JOHNSON'1',G.JONES'1',E.L.MATHIE'1',P.WALDEN'1', D.HUTCHEON'2',P.KITCHING'2',W.C.OLSEN'2',C.F.PERDRISAT'3', B.TATISCHEFF'4'); INST-ATH=(1CANUBC'1',1CANALA'2',1USAWMC'3',2FR PAR'4'); REF=PL/B; VLP=93(1980)258; RCTS=(D,(P,PIP)T); \\EXP,1[8; RCT=D(P,PIP)T; RTY=X'1'; /*@3@*/ ENR=NAT; CHM=ELM; PHYS-FORM=LIQD; THK-TGT=520MG/CM**2; POL-TGT=NO; ACC=(CYC'1'); /*@4@*/ INST-ACC=1CANUBC; INC-ENGY-LAB=(400MEV,425MEV,443MEV,470MEV); DET-PARTCL=(PIP); COINC=/@14@/; DET-SYS=(MAG+PS-SI+PLST-SCT+TOF'2'+CNTR-TLSCP'1'+X'3'); /*@5@*/ /*@6@*/ /*@7@*/ SOLID-ANGL=2.8MSR; ERS-DET=4MEV; CALB-DET=/@8@/; /*@10@*/ ANL=(X'1'); /*@9@*/ PHQ=(XSECTN.ANGL-DSTRN,,ANALPW); \\EXP,1[4; PHQ=(ANGL-DSTRN); \\DATA,1; INC-ENGY-LAB=400MEV; /*FIG.2-(1)-(A)*/ /* D604 FIG.2-(1)-(A) */ /* SER#= 1 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA FLAG (DEG) (UB/SR) (UB/SR) (NODIM) 135.982 1.150E+00 +-X 1. 135.652 3.562E-01 +-X 2. 135.652 7.619E-01 +-4.761E-02 3. 144.017 1.054E+00 +-X 1. 143.826 3.904E-01 +-X 2. 144.174 7.279E-01 +-4.761E-02 3. 152.576 9.592E-01 +-X 1. 152.522 3.767E-01 +-X 2. 152.348 6.327E-01 +-4.761E-02 3. 159.913 6.939E-01 +-X 1. 159.652 2.534E-01 +-X 2. 159.826 4.626E-01 +-5.442E-02 3. 167.424 6.054E-01 +-X 1. 167.304 4.218E-01 +-4.081E-02 3. \END; /* FLAG (1.) spin down (2.) spin up (3.) average */ \\DATA,2; INC-ENGY-LAB=425MEV; /*FIG.2-(2)-(A)*/ /* D604 FIG.2-(2)-(A) */ /* SER#= 9 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA FLAG (DEG) (UB/SR) (UB/SR) (NODIM) 136.696 8.069E-01 +-X 1. 137.229 3.958E-01 +-X 2. 137.043 6.111E-01 +-4.861E-02 3. 152.174 9.103E-01 +-X 1. 152.467 2.014E-01 +-X 2. 152.522 5.486E-01 +-6.250E-02 3. 167.652 7.241E-01 +-X 1. 167.706 2.014E-01 +-X 2. 167.478 4.722E-01 +-4.861E-02 3. \END; /* FLAG (1.) spin down (2.) spin up (3.) average */ \\DATA,3; INC-ENGY-LAB=443MEV; /*FIG.2-(3)-(A)*/ /* D604 FIG.2-(3)-(A) */ /* SER#= 5 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA FLAG (DEG) (UB/SR) (UB/SR) (NODIM) 137.759 9.931E-01 +-X 1. 137.576 4.138E-01 +-X 2. 137.749 7.034E-01 +-3.448E-02 3. 145.000 1.152E+00 +-X 1. 145.022 4.552E-01 +-X 2. 145.022 7.862E-01 +-6.206E-02 3. 152.586 9.724E-01 +-X 1. 152.641 4.414E-01 +-X 2. 152.641 7.172E-01 +-4.827E-02 3. 159.828 8.138E-01 +-X 1. 159.913 5.034E-01 +-X 2. 159.567 6.621E-01 +-6.896E-02 3. 167.414 7.379E-01 +-X 1. 167.532 8.759E-01 +-X 2. 167.532 8.069E-01 +-3.448E-02 3. \END; /* FLAG (1.) spin down (2.) spin up (3.) average */ \\DATA,4; INC-ENGY-LAB=470MEV; /*FIG.2-(4)-(A)*/ /* D604 FIG.2-(4)-(A) */ /* SER#= 13 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC DSIGMA/DOMEGA DELTA-DSIGMA/DOMEGA FLAG (DEG) (UB/SR) (UB/SR) (NODIM) 137.904 1.061E+00 +-X 1. 137.749 2.027E-01 +-X 2. 137.749 6.259E-01 +-4.761E-02 3. 145.589 8.299E-01 +-X 1. 152.402 1.014E+00 +-X 1. 152.987 6.757E-03 +-X 2. 152.294 4.966E-01 +-6.122E-02 3. 160.611 5.714E-01 +-X 1. 160.606 4.865E-01 +-X 2. 160.606 5.238E-01 +-XXXXXXXXX 3. 168.297 5.714E-01 +-X 1. 167.879 7.905E-01 +-X 2. 167.879 6.939E-01 +-6.802E-02 3. \END; /* FLAG (1.) spin down (2.) spin up (3.) average */ \\EXP,5[8; PHQ=(ANALPW); \\DATA,5; INC-ENGY-LAB=400MEV; /*FIG.2-(1)-(D)*/ /* D604 FIG.2-(1)-(D) */ /* SER#= 4 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC ANALPW DELTA-ANALPW (DEG) (NODIM) (NODIM) 135.498 -5.532E-01 7.801E-02 144.156 -4.894E-01 1.063E-01 152.121 -4.610E-01 9.929E-02 159.913 -4.610E-01 1.205E-01 167.532 -3.404E-01 1.347E-01 \END; \\DATA,6; INC-ENGY-LAB=425MEV; /*FIG,2-(2)-(D)*/ /* D604 FIG.2-(2)-(D) */ /* SER#= 12 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC ANALPW DELTA-ANALPW (DEG) (NODIM) (NODIM) 137.555 -3.617E-01 8.510E-02 152.576 -6.809E-01 1.134E-01 168.122 -6.028E-01 1.276E-01 \END; \\DATA,7; INC-ENGY-LAB=443MEV; /*FIG.2-(3)-(D)*/ /* D604 FIG.2-(3)-(D) */ /* SER#= 8 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC ANALPW DELTA-ANALPW (DEG) (NODIM) (NODIM) 137.403 -4.069E-01 7.586E-02 144.848 -4.138E-01 1.034E-01 152.467 -3.724E-01 1.310E-01 159.913 -2.000E-01 1.448E-01 167.186 8.276E-02 1.862E-01 \END; \\DATA,8; INC-ENGY-LAB=470MEV; /*FIG.2-(4)-(D)*/ /* D604 FIG.2-(4)-(D) */ /* SER#= 16 */ /* XSCALE=LINEAR YSCALE=LINEAR */ /* XMAX= 1.80000000E+02 YMAX= 1.00000000E+00 */ /* XMIN= 1.40000000E+02 YMIN= 0.00000000E+00 */ /* FOLLOWING DATA ARE TAKEN FROM GRAPH */ \DATA; THTC ANALPW DELTA-ANALPW (DEG) (NODIM) (NODIM) 137.709 -7.014E-01 1.597E-01 153.216 -1.069E+00 2.083E-01 160.441 -4.167E-02 1.874E-01 168.018 1.736E-01 1.736E-01 \END; \\END; @@3; '1' X=PION PRODUCTION @@5: '1' 3 COUNTERTELESCOPE CONSISTING OF TWO DE/DX COUNTERS(5.3CM IN DIAMET ER,0.16CM THICK)(C1,C2) AND A PION-STOPPING COUNTER C3(12.7CM IN DIAME TER 30.5CM LONG), ALL MADE OF NE110 SCINTILLATOR @@6; '2' C1,C2 LOCATED 58.6CM APART @@14; IN A THREE-FOLD COINCIDENCE(C1,C2,C3),THE TIME RESOLUTION WAS SUCH THAT 4LSE FOR MORE THAN 96% OF ALL EVENTS. @@7; '3' X=BEAM POLARIMETER @@8; ENERGY CALIBRATION FROM THE REACTION H(P,PI)D MADE USING A CH22 TARGET A EACH OF THE FOUR INCIDENT P ENERGIES @@9; '1' X=THE TWO NUCLEON MODEL @@10; FOR ALL FOUR BEAM ENERGIES AND AT EACH ANGLE,THE BACKGROUND ABOVE THE T WO-BODY PEAK COULD BE APPROXIMATED BY AN EXPONENTIAL A*EXP(-(TPI-TO)/B) ,WHERE TPI IS THE PION ENERGY,TO THE ENERGY CORRESPONDING TO THE MINIMU M LEFT OF THE PEAK ,B THE SLOPE AND A THE AMPLITUDE,THE LATTER TWO SHOW ING SMALL AND SMOOTH VARIATION OVER ANGLE AND ENERGY. @@;