ENTRY 22223 19961014 00002222300000001 SUBENT 22223001 19961014 00002222300100001 BIB 16 55 2222300100002 INSTITUTE (2SWDUPP) 2222300100003 REFERENCE (J,PR/C,45,(2),496,9202) 2222300100004 AUTHOR (T.ROENNQVIST,H.CONDE,N.OLSSON,R.ZORRO,J.BLOMGREN, 2222300100005 G.TIBELL,O.JONSSON,L.NILSSON,P.U.RENBERG, 2222300100006 S.Y.VAN DER WERF) 2222300100007 TITLE -BACKWARD ANGLE N-P DIFFERENTIAL CROSS SECTION AT 96 2222300100008 MEV. 2222300100009 FACILITY (CYCLO) THE GUSTAF WERNER CYCLOTRON AT THE SVEDBERG 2222300100010 LABORATORY, UPPSALA UNIVERSITY, WAS USED. 2222300100011 INC-SOURCE (P-LI7) A PROTON BEAM OF 100 MEV IMPINGED ON A 100-200 2222300100012 MG/CM2 THICK LITHIUM TARGET, ENRICHED TO 99.98 PER- 2222300100013 CENT IN 7-LI. THE UNAFFECTED PROTON BEAM WAS BENT BY 2222300100014 A MAGNET INTO A WELL-SHIELDED BEAM DUMP, WHILE THE 2222300100015 NEUTRONS WERE COLLIMATED IN A NARROW CONE AT 0 DEGREES2222300100016 BY A HEAVY COLLIMATOR SYSTEM, BEFORE ENTERING THE EX- 2222300100017 PERIMENTAL AREA ABOUT 8 M AFTER THE PRODUCTION TARGET.2222300100018 THE NEUTRON BEAM SPOT AT THE IRRADIATION POSITION HAD 2222300100019 A DIAMETER OF 7 CM. 2222300100020 INC-SPECT .THE NEUTRONS SHOWED A SEMI-MONOENERGETIC NEUTRON SPEC-2222300100021 TRUM, WITH A FULL ENERGY PEAK AND A LOW-ENERGY TAIL. 2222300100022 THE LATTER WAS SUPRESSED BY TOF TECHNIQUES. 2222300100023 SAMPLE .THREE TO FOUR 50 MG/CM2 THICK CH2 TARGETS WERE MOUNTED2222300100024 IN A MULTITARGET SYSTEM WITH MULTIWIRE PROPORTIONAL 2222300100025 CHAMBERS BETWEEN THE TARGETS. IN THIS WAY THE ENERGY 2222300100026 LOSS IN THE SUBSEQUENT TARGETS COULD BE CORRECTED FOR.2222300100027 FOR ANGLES LARGER THAN 15 DEGREES, PROTONS FROM REAC- 2222300100028 TIONS ON CARBON IN THE TARGET CHAMBER FOILS CAN INTER-2222300100029 FERE, AND A 85 MG/CM2 12-C TARGET WAS USED TO CORRECT 2222300100030 FOR THAT. 2222300100031 DETECTOR (MAGSP) THE RECOIL PROTONS WERE DETECTED BY A MAGNETIC 2222300100032 SPECTROGRAPH, EQUIPPED WITH FOUR POSITION-SENSITIVE 2222300100033 DRIFT CHAMBERS AND THREE TRIGGER SCINTILLATORS. THE 2222300100034 PROTON ENERGY AND EMISSION ANGLE WAS DETERMINED BY 2222300100035 RAY-TRACING THROUGH THE MAGNETIC FIELD. 2222300100036 (MWPC ) 2222300100037 (SCIN ) 2222300100038 PART-DET (P ) 2222300100039 ANALYSIS (INTAD) GAUSSIANS WERE FITTED TO THE PROTON PEAK FOR 2222300100040 EACH ANGULAR BIN. SINCE THE DATA ONLY SPAN A PART OF 2222300100041 THE FULL ANGULAR RANGE, IT WAS EXTRAPOLATED BY USING 2222300100042 THE VL35 SOLUTION OF THE ARNDT ET AL PHASE-SHIFT ANA- 2222300100043 LYSIS. IN THIS WAY THE DIFFERENTIAL DATA COULD BE 2222300100044 INTEGRATED AND NORMALIZED TO THE TOTAL CROSS SECTION. 2222300100045 MONITOR (1-H-1(N,TOT),,SIG) 2222300100046 CORRECTION .THE DATA WERE CORRECTED FOR BACKGROUND AND FOR ACCEP- 2222300100047 TANCE EFFECTS. 2222300100048 ERR-ANALYS (DATA-ERR) THE ERRORS GIVEN ARE MAINLY STATISTICAL AND 2222300100049 ORIGINATE FROM COUNTING STATISTICS, THE PEAK-FITTING 2222300100050 PROCEDURE AND 12-C BACKGROUND SUBTRACTION. IN ADDI- 2222300100051 TION, THERE IS A SYSTEMATIC CROSS SECTION SCALE UN- 2222300100052 CERTAINTY OF 4 PER-CENT. 2222300100053 STATUS .DATA TAKEN FROM MAIN REF. 2222300100054 HISTORY (921206C) N.O. 2222300100055 (930329E) 2222300100056 (961014U) + + ENTRY CORRECTED BY S. MAEV + + 2222300100057 ENDBIB 55 0 2222300100058 NOCOMMON 0 0 2222300100059 ENDSUBENT 58 0 2222300199999 SUBENT 22223002 19961014 00002222300200001 BIB 3 6 2222300200002 REACTION (1-H-1(N,EL)1-H-1,,DA) 2222300200003 STATUS .DATA TAKEN FROM MAIN REF. 2222300200004 HISTORY (921206C) N.O. 2222300200005 (930329E) 2222300200006 (961014U) EN-RSL-HW TRANSFERRED FROM DATA TO COMMON 2222300200007 SECTION 2222300200008 ENDBIB 6 0 2222300200009 COMMON 4 3 2222300200010 EN EN-RSL-HW MONIT MONIT-ERR 2222300200011 MEV MEV MB MB 2222300200012 9.6000E+01 5.0000E-00 7.7700E+01 3.0000E-01 2222300200013 ENDCOMMON 3 0 2222300200014 DATA 3 32 2222300200015 ANG-CM DATA-CM DATA-ERR 2222300200016 ADEG MB/SR MB/SR 2222300200017 1.1700E+02 5.4800E+00 1.6000E-01 2222300200018 1.1900E+02 5.5600E+00 1.6000E-01 2222300200019 1.2100E+02 5.7500E+00 1.6000E-01 2222300200020 1.2300E+02 6.1700E+00 1.7000E-01 2222300200021 1.2500E+02 6.2600E+00 1.7000E-01 2222300200022 1.2700E+02 6.2500E+00 1.7000E-01 2222300200023 1.2900E+02 6.6100E+00 1.4000E-01 2222300200024 1.3100E+02 7.0900E+00 1.5000E-01 2222300200025 1.3300E+02 7.2400E+00 1.5000E-01 2222300200026 1.3500E+02 7.3600E+00 1.5000E-01 2222300200027 1.3700E+02 7.4100E+00 1.5000E-01 2222300200028 1.3900E+02 7.7200E+00 1.5000E-01 2222300200029 1.4100E+02 7.9000E+00 1.5000E-01 2222300200030 1.4300E+02 8.0000E+00 1.5000E-01 2222300200031 1.4500E+02 8.2400E+00 1.6000E-01 2222300200032 1.4700E+02 8.4700E+00 1.6000E-01 2222300200033 1.4900E+02 8.8000E+00 1.1000E-01 2222300200034 1.5100E+02 9.0400E+00 1.1000E-01 2222300200035 1.5300E+02 9.2600E+00 1.3000E-01 2222300200036 1.5500E+02 9.9700E+00 1.4000E-01 2222300200037 1.5700E+02 1.0400E+01 1.4000E-01 2222300200038 1.5900E+02 1.0830E+01 1.5000E-01 2222300200039 1.6100E+02 1.1060E+01 1.5000E-01 2222300200040 1.6300E+02 1.1710E+01 1.5000E-01 2222300200041 1.6500E+02 1.2210E+01 1.6000E-01 2222300200042 1.6700E+02 1.2910E+01 1.7000E-01 2222300200043 1.6900E+02 1.3370E+01 1.4000E-01 2222300200044 1.7100E+02 1.3800E+01 1.4000E-01 2222300200045 1.7300E+02 1.4260E+01 1.4000E-01 2222300200046 1.7500E+02 1.4610E+01 1.6000E-01 2222300200047 1.7700E+02 1.4920E+01 1.6000E-01 2222300200048 1.7900E+02 1.4800E+01 1.8000E-01 2222300200049 ENDDATA 34 0 2222300200050 ENDSUBENT 49 0 2222300299999 ENDENTRY 2 0 2222399999999