ENTRY 22129 19910617 00002212900000001 SUBENT 22129001 19910617 00002212900100001 BIB 15 58 2212900100002 REFERENCE (J,PR/C,41,2556,9006) MAIN REFERENCE 2212900100003 (W,OLSSON,891109) 2212900100004 TITLE -THE 12-C(N,GAMMA0)13-C CROSS SECTION IN THE 8 - 11 MEV2212900100005 REGION. 2212900100006 COMMENT .THIS EXPERIMENT WAS PERFORMED IN AN ATTEMPT TO 2212900100007 RESOLVE DESCREPANCIES FOUND IN A PREVIOUS EXPERIMENT, 2212900100008 REF. NP/A,456,426 (1986), EXFOR 22142. 2212900100009 AUTHOR (A.HAAKANSSON,A.LINDHOLM,L.NILSSON,J.BLOMGREN, 2212900100010 P.O.SOEDERMAN,D.M.DRAKE,S.A.WENDER,N.OLSSON) 2212900100011 INSTITUTE (2SWDTLU) A.H., A.L., L.N., J.B., P.O.S. AND EXPERIMEN-2212900100012 TAL SITE. 2212900100013 (1USALAS) D.M.D., S.A.W. 2212900100014 (2SWDSWR) N.O. 2212900100015 FACILITY (VDGT ) THE UPPSALA EN TANDEM VAN DE GRAAFF ACCELERATOR2212900100016 DELIVERED 2 NS BUNCHES OF 7.8, 9.3 AND 10.8 MEV DEUTE-2212900100017 RONS AT A REPETITION RATE OF 2 MHZ. 2212900100018 INC-SOURCE (D-D ) NEUTRONS WERE PRODUCED USING A STAINLESS STEEL 2212900100019 DEUTERIUM GAS TARGET, 2.5 CM LONG AND WITH A 6 MG/CM2 2212900100020 THICK NICKEL ENTRANCE FOIL, FILLED TO A PRESSURE OF 2212900100021 1.7 ATM. 2212900100022 METHOD (TOF ) NEUTRON-GAMMA SEPARATION WAS OBTAINED WITH 2212900100023 TIME-OF-FLIGHT TECHNIQUES. 2212900100024 DETECTOR (NAICR) THE GAMMA-RAY SPECTROMETER CONSISTED OF A 2212900100025 NAI/TL/ CRYSTAL, 24 CM IN DIAMETER AND 36 CM LONG, 2212900100026 (SCIN ) SUURROUNDED BY A PLASTIC ANTICOINCIDENCE 2212900100027 SHIELD, CONSISTING OF AN ANNULUS DETECTOR AND A FRONT 2212900100028 DETECTOR. BORATED PARAFFIN WAS USED TO SHIELD THE DE- 2212900100029 TECTOR FROM ROOM-SCATTERED NEUTRONS, WHILE A LAYER OF 2212900100030 LEAD SERVED AS A SHIELD FOR BACKGROUND GAMMA-RAYS. A 2212900100031 HEVIMET SHADOW BAR ATTENUATED THE DIRECT TARGET NEU- 2212900100032 TRON FLUX. A PLUG OF LITHIUM HYDRIDE WAS INSERTED IN 2212900100033 THE COLLIMATOR TO REDUCE THE EFFECT OF SCATTERED NEU- 2212900100034 TRONS. THE DETECTOR RESPONSE FUNCTIONS WERE DETERMINED2212900100035 BY MEANS OF PROTON CAPTURE GAMMA-RAYS FROM 11-B. THE 2212900100036 DETECTOR EFFICIENCY WAS CALCULATED WITH A MONTE CARLO 2212900100037 COMPUTER CODE. 2212900100038 (SCIN ) NORMALIZATION OF DIFFERENT RUNS WAS ACCOMP- 2212900100039 LISHED WITH A PLASTIC NEUTRON MONITOR OPERATING IN TOF2212900100040 MODE, WHICH VIEWED THE NEUTRON PRODUCTION TARGET AT A 2212900100041 DISTANCE OF 4 M AND AT AN ANGLE OF 60 DEG. 2212900100042 MONITOR (20-CA-40(N,G)20-CA-41,PAR,DA) GROUND STATE TRANSITION.2212900100043 SAMPLE .CYLINDRICAL SAMPLES OF CARBON AND CALCIUM, 3.1 CM IN 2212900100044 DIAMETER AND 3.8 CM IN HEIGHT, ORIENTED WITH THE 2212900100045 SYMMETRY AXIS PERPENDICULAR TO THE REACTION PLANE AND 2212900100046 AT A DISTANCE OF 11 CM FROM THE TARGET CELL. THE CAR- 2212900100047 BON AND CALCIUM SAMPLE MASSES WERE 51.24 G AND 46.21 2212900100048 G, RESPECTIVELY, BOTH BEING OF NATURAL ISOTOPIC COM- 2212900100049 POSITION. 2212900100050 CORRECTION .THE DATA WERE CORRECTED FOR BACKGROUND, DEAD-TIME, 2212900100051 NEUTRON AND GAMMA ATTENUATION, AND MULTIPLE SCATTERING2212900100052 EFFECTS. 2212900100053 ERR-ANALYS (DATA-ERR) STATISTICAL ERRORS ONLY. IN ADDITION, THERE 2212900100054 IS A +/- 20 PERCENT SYSTEMATIC UNCERTAINTY. 2212900100055 STATUS .DATA TAKEN FROM MAIN REF. 2212900100056 HISTORY (891109C) N.O. 2212900100057 (891211E) 2212900100058 (910125A) S.W. MAIN REFERENCE ADDED, COMMENT ADDED 2212900100059 (910205E) 2212900100060 ENDBIB 58 0 2212900100061 NOCOMMON 0 0 2212900100062 ENDSUBENT 61 0 2212900199999 SUBENT 22129002 19891211 00002212900200001 BIB 3 4 2212900200002 REACTION (6-C-12(N,G)6-C-13,PAR,DA) GROUND STATE TRANSITION. 2212900200003 STATUS .DATA TAKEN FROM MAIN REF. 2212900200004 HISTORY (891109C) N.O. 2212900200005 (891211E) 2212900200006 ENDBIB 4 0 2212900200007 COMMON 1 3 2212900200008 E-LVL-FIN 2212900200009 MEV 2212900200010 0.0000E+00 2212900200011 ENDCOMMON 3 0 2212900200012 DATA 6 3 2212900200013 EN ANG DATA DATA-ERR MONIT MONIT-ERR 2212900200014 MEV ADEG MU-B/SR MU-B/SR MU-B/SR MU-B/SR 2212900200015 7.8000E+00 9.0000E+01 2.9500E+00 5.1000E-01 7.8900E+00 2.1000E-012212900200016 9.3000E+00 9.0000E+01 3.1400E+00 3.6000E-01 1.2680E+01 2.3000E-012212900200017 1.0800E+01 9.0000E+01 3.2200E+00 3.7000E-01 1.5650E+01 2.8000E-012212900200018 ENDDATA 5 0 2212900200019 ENDSUBENT 18 0 2212900299999 ENDENTRY 2 0 2212999999999