ENTRY P+55 0 P+55 0 1 SUBENT P+55 1 0 P+55 1 1 BIB 12 62 P+55 1 2 INSTITUTE (CANCRC) P+55 1 3 REFERENCE (J,PR,99,5,1339,1955) P+55 1 4 AUTHORS (E.B.PAUL,H.E.GOVE,A.E.LITHERLAND,G.A.BARTHOLOMEW) P+55 1 5 TITLE PROTON CAPTURE GAMMA RAYS FROM THE REACTION P+55 1 6 31P(P,GAMMA)32S LEADING TO THE GROUND AND FIRST P+55 1 7 EXCITED STATES OF 32S P+55 1 8 FACILITY (VDG) ELECTROSTATIC ACCELERATOR, CHALK RIVER P+55 1 9 LABORATORY, AECL, CHALK RIVER, ONTARIO, CANADA. P+55 1 10 INC-PART (P) PROTONS. P+55 1 11 TARGETS ZN3P2 EVAPORATED ON 20-MIL TANTALUM BACKINGS TO A P+55 1 12 THICKNESS OF ABOUT 700 EV FOR THE YIELD MEASUREMENTS P+55 1 13 AND ABOUT 10 KEV THICKNESS FOR ANGULAR DISTRIBUTION P+55 1 14 MEASUREMENTS, BOTH AT 1.25 MEV PROTON ENERGY. P+55 1 15 METHOD PROTONS WITH ENERGIES IN THE RANGE EP = 0.68 - 2.35 P+55 1 16 MEV WERE OBTAINED FROM THE CHALK RIVER ELECTROSTATIC P+55 1 17 ACCELERATOR. THESE PROTONS WERE ANALYZED IN ENERGY P+55 1 18 BY A 90-DEGREE MAGNET WHOSE FIELD WAS MONITORED AND P+55 1 19 STABILIZED BY A PROTON RESONANCE FLUXMETER WITH P+55 1 20 FEEDBACK. A PAIR OF TANTALUM PLATES FORMED A P+55 1 21 HORIZONTAL SLIT AT THE EXIT OF THIS MAGNET. THE P+55 1 22 SLIT CURRENT WAS USED TO CONTROL THE CORONA LOAD P+55 1 23 ON THE ACCELERATOR. BY THIS MEANS, THE ENERGY WAS P+55 1 24 STABILIZED TO 0.1 PERCENT. THE PROTONS TRAVELLED P+55 1 25 ALONG A 15-FOOT SECTION OF EVACUATED TUBING WHICH P+55 1 26 WAS TERMINATED BY A HOLLOW BRASS CYLINDER WITH P+55 1 27 1/16-TH INCH WALLS CONTAINING THE TARGET. THE BEAM P+55 1 28 WAS DEFINED ON TARGET TO ABOUT 1/4-TH INCH DIAMETER P+55 1 29 BY A 1/8-TH INCH APERTURE IN A 20-MIL TANTALUM DISK P+55 1 30 SITUATED ABOUT 8 FEET FROM THE TARGET. THE BEAM P+55 1 31 CURRENTS USED IN THIS EXPERIMENT WERE IN THE RANGE P+55 1 32 5 - 20 MICROAMPS. A DETECTOR WAS PLACED AT 90 DEGREES P+55 1 33 FOR THE GAMMA-RAY YIELD MEASUREMENTS. IT WAS SITUATED P+55 1 34 ABOUT 3 INCHES FROM THE TARGET CENTER. AN EXCITATION P+55 1 35 FUNCTION OF GAMMA-RAY YIELDS TO THE GROUND STATE AND P+55 1 36 2.25-KEV FIRST-EXCITED STATE IN 32S WERE MEASURED. P+55 1 37 AT EACH RESONANCE, GAMMA-RAY SPECTRA WERE MEASURED P+55 1 38 USING A 30-CHANNEL PULSE-HEIGHT ANALYZER. THE TARGET P+55 1 39 THICKNESS WAS MEASURED IN AN ADDITIONAL EXPERIMENT IN P+55 1 40 WHICH THE ENERGY LOSS IN THE TARGET WAS DETERMINED P+55 1 41 BY COMPARING THE STEP IN THE THICK-TARGET YIELD CURVE P+55 1 42 WITH THE AREA UNDER THE THIN-TARGET YIELD FOR THE P+55 1 43 WELL-ISOLATED RESONANCE AT EP = 1.248 MEV. ANGULAR P+55 1 44 DISTRIBUTIONS WERE MEASURED WITH A SINGLE NAI DETECTOR P+55 1 45 SITUATED 5 INCHES FROM THE CENTER OF THE TARGET. IT P+55 1 46 COULD BE ROTATED BETWEEN 0 AND 150 DEGREES. A SECOND P+55 1 47 IDENTICAL DETECTOR WAS PLACED ON THE OTHER SIDE OF P+55 1 48 THE TARGET AT 90 DEGREES AND A DISTANCE OF 4 INCHES P+55 1 49 FROM THE TARGET FOR USE AS A MONITOR. THE ANGULAR P+55 1 50 DISTRIBUTIONS WERE FOUND TO BE INSENSITIVE TO TARGET P+55 1 51 THICKNESS. THE ANGULAR DISTRIBUTION DATA WERE FITTED P+55 1 52 WITH LEGENDRE POLYNOMIAL EXPANSIONS UP TO 4-TH ORDER P+55 1 53 BY THE METHOD OF LEAST SQUARES. P+55 1 54 DETECTORS (SCINT) 2-INCH X 2-INCH NAI(TL) SCINTILLATION P+55 1 55 CRYSTAL DETECTORS. P+55 1 56 MONITORS (CI) CURRENT INTEGRATOR. P+55 1 57 (SCINT) NAI(TL) SCINTILLATION CRYSTAL DETECTOR. P+55 1 58 CORRECTION GAMMA-RAY DATA WERE CORRECTED FOR ABSORPTION IN THE P+55 1 59 TANTALUM BACKING OF THE TARGET. THIS CORRECTION WAS P+55 1 60 ON THE ORDER OF 10 PERCENT. P+55 1 61 ERR-ANALYS AN UNCERTAINTY OF 10 PERCENT WAS ASSUMED TO ACCOUNT P+55 1 62 FOR EXTRAPOLATION OF THE COMPTON DISTRIBUTION TO ZERO P+55 1 63 PULSE HEIGHT. P+55 1 64 ENDBIB 62 P+55 1 65 ENDSUBENT 1 P+55 199999 SUBENT P+55 2 0 P+55 2 1 BIB 2 11 P+55 2 2 REACTION 31P(P,GAMMA-0)32S P+55 2 3 COMMENTS ANGULAR DISTRIBUTION COEFFICIENTS ARE GIVEN FOR THE P+55 2 4 GROUND-STATE GAMMA-RAY TRANSITION FROM SEVERAL P+55 2 5 RESONANCES. EP = PROTON ENERGY OF THE RESONANCE. P+55 2 6 COEFFICIENTS BI (B1, B2, B3, AND B4) CORRESPONDING P+55 2 7 TO THE EXPANSION W = P0 + B1*P1 + B2*P2 +B3*P3 + P+55 2 8 B4*P4 ARE PROVIDED. PI IS A LEGENDRE POLYNOMIAL OF P+55 2 9 I-TH ORDER (I = 0, 1, 2, 3, AND 4). DATA TAKEN FROM P+55 2 10 TABLE I OF THE ORIGINAL PAPER. NO ERRORS ARE GIVEN. P+55 2 11 BI-ERR = ERROR IN COEFFICIENT BI (I = 1, 2, 3, 4). A P+55 2 12 BLANK SPACE INDICATES THAT THE VALUE IS UNAVAILABLE. P+55 2 13 ENDBIB 11 P+55 2 14 DATA 9 9 P+55 2 15 EP B1 B1-ERR B2 B2-ERR B3 P+55 2 16 B3-ERR B4 B4-ERR P+55 2 17 MEV NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM P+55 2 18 NO-DIM NO-DIM NO-DIM P+55 2 19 0.825 0.07 0.05 -0.56 0.07 0.10 P+55 2 20 0.08 -0.19 0.08 P+55 2 21 1.117 0.02 0.04 -0.27 0.06 0.07 P+55 2 22 0.07 -0.05 0.06 P+55 2 23 1.248 0.4 0.1 P+55 2 24 P+55 2 25 1.892 0.04 0.03 -0.51 0.04 0.06 P+55 2 26 0.06 -0.06 0.06 P+55 2 27 1.985 -0.01 0.04 -0.01 0.05 -0.02 P+55 2 28 0.06 0.06 0.06 P+55 2 29 2.027 0.09 0.02 -0.14 0.02 -0.08 P+55 2 30 0.02 0.04 0.02 P+55 2 31 2.120 0.04 0.04 -0.58 0.06 0.16 P+55 2 32 0.06 -0.07 0.06 P+55 2 33 2.320 0.13 0.03 0.08 0.03 -0.05 P+55 2 34 0.04 0.02 0.04 P+55 2 35 2.340 0.01 0.02 -0.01 0.03 0.07 P+55 2 36 0.03 -0.09 0.03 P+55 2 37 ENDDATA 22 P+55 2 38 ENDSUBENT 2 P+55 299999 SUBENT P+55 3 0 P+55 3 1 BIB 2 11 P+55 3 2 REACTION 31P(P,GAMMA-1)32S P+55 3 3 COMMENTS ANGULAR DISTRIBUTION COEFFICIENTS ARE GIVEN FOR THE P+55 3 4 FIRST-EXCITED STATE GAMMA-RAY TRANSITION FROM SEVERAL P+55 3 5 RESONANCES. EP = PROTON ENERGY OF THE RESONANCE. P+55 3 6 COEFFICIENTS BI (B1, B2, B3, AND B4) CORRESPONDING P+55 3 7 TO THE EXPANSION W = P0 + B1*P1 + B2*P2 +B3*P3 + P+55 3 8 B4*P4 ARE PROVIDED. PI IS A LEGENDRE POLYNOMIAL OF P+55 3 9 I-TH ORDER (I = 0, 1, 2, 3, AND 4). DATA TAKEN FROM P+55 3 10 TABLE II OF THE ORIGINAL PAPER. NO ERRORS ARE GIVEN. P+55 3 11 BI-ERR = ERROR IN COEFFICIENT BI (I = 1, 2, 3, 4). P+55 3 12 A BLANK SPACE INDICATES THAT THE VALUE IS UNAVAILABLE. P+55 3 13 ENDBIB 11 P+55 3 14 DATA 9 3 P+55 3 15 EP B1 B1-ERR B2 B2-ERR B3 P+55 3 16 B3-ERR B4 B4-ERR P+55 3 17 MEV NO-DIM NO-DIM NO-DIM NO-DIM NO-DIM P+55 3 18 NO-DIM NO-DIM NO-DIM P+55 3 19 0.816 -0.02 0.02 0.37 0.03 -0.02 P+55 3 20 0.04 0.06 0.04 P+55 3 21 1.146 -0.02 0.02 0.17 0.02 P+55 3 22 P+55 3 23 1.248 0.04 0.01 0.31 0.01 0.04 P+55 3 24 0.02 -0.03 0.01 P+55 3 25 ENDDATA 10 P+55 3 26 ENDSUBENT 3 P+55 399999 SUBENT P+55 4 0 P+55 4 1 BIB 2 11 P+55 4 2 REACTION 31P(P,GAMMA-0)32S P+55 4 3 COMMENTS RESONANCE STRENGTHS AND WIDTHS ARE GIVEN FOR SEVERAL P+55 4 4 RESONANCES IN 32S FORMED BY RADIATIVE PROTON CAPTURE. P+55 4 5 ONLY THE STRENGTH OF THE GROUND-STATE TRANSITION IS P+55 4 6 GIVEN. DATA OBTAINED FROM TABLE V OF THE ORIGINAL P+55 4 7 PAPER. EP = RESONANCE PROTON ENERGY. GAM(T) = TOTAL P+55 4 8 WIDTH OF THE RESONANCE. GAM(G-0) = GROUND-STATE P+55 4 9 RADIATIVE TRANSITION WIDTH. RESONANCE STRENGTH = P+55 4 10 S0 = (2J+1)*GAM(P)*GAM(G-0)/GAM(T), WHERE J = SPIN P+55 4 11 OF THE RESONANCE, AND GAM(P) = PROTON WIDTH. A BLANK P+55 4 12 SPACE SIGNIFIES THAT THE VALUE IS UNAVAILABLE. P+55 4 13 ENDBIB 11 P+55 4 14 DATA 4 9 P+55 4 15 EP S0 GAM(G-0) GAM(T) P+55 4 16 MEV EV EV KEV P+55 4 17 0.825 0.09 0.12 P+55 4 18 1.117 0.47 0.63 P+55 4 19 1.248 0.06 0.048 P+55 4 20 1.892 9.2 12.0 24. P+55 4 21 1.985 3.3 4.4 10. P+55 4 22 2.027 6.5 8.7 24. P+55 4 23 2.120 1.0 1.3 5. P+55 4 24 2.320 5.0 6.7 8. P+55 4 25 2.340 16.0 21.0 8. P+55 4 26 ENDDATA 11 P+55 4 27 ENDSUBENT 4 P+55 499999 ENDENTRY 4 P+559999999