ENTRY 20498 19840120 00002049800000001 SUBENT 20498001 19840120 00002049800100001 BIB 16 42 2049800100002 INSTITUTE (2ITYTUR) 2049800100003 REFERENCE (J,NCL,8,249,7309) 2049800100004 (C,72BUD,,134,7208) ALSO C-12 AND O-16. 2049800100005 (J,NIM,87,291,7010) WITH DETAILS ON EXPERIMENTAL 2049800100006 TECHNIQUES. 2049800100007 AUTHOR (B.MINETTI, A.PASQARELLI, G.C.BONAZZOLA, T.BRESSANI, 2049800100008 E.CHIAVASSA) 2049800100009 TITLE -ELASTIC AND INELASTIC BACKSCATTERING OF 14.2 MEV 2049800100010 NEUTRONS FROM SI-28.- 2049800100011 FACILITY (CCW ) 14 MEV ELECTRO-STATIC GENERATOR AT ISTITUTO 2049800100012 DI FISICA SPERIMENTALE DEL POLITECNICO, TURIN. 2049800100013 INC-SOURCE (D-T ) DEUTERON-TRITIUM. 2049800100014 SAMPLE NATURAL POWDERED SI (92.2 PERC. SI-28, 4.7 PERC. SI-292049800100015 AND 3.1 PERC. SI-30). 2049800100016 SAMPLE WAS CONTAINED IN A PARALLELEPIPED, 70 * 70 * 4 2049800100017 CM3, COMPOSED OF AN ALUMINUM FRAME WITH 2 POLYETYLENE 2049800100018 WINDOWS STRENGTHENED BY A THIN ALUMINUM MESH. 2049800100019 METHOD (TOF ) TIME OF FLIGHT, PATH = 220 CM. SEE 2049800100020 NUCL.INSTR.METH.,87(1970)291. 2049800100021 DETECTOR (SCIN ) NE 213 LIQUID SCINTILLATOR, CONTAINED IN A 2049800100022 CYLINDRICAL BOX OF 9 CM DIAM. AND 10 CM LENGTH, WITH 2049800100023 A XP 1021 PHOTOMULTIPLIER. 2049800100024 ANALYSIS - THE WHOLE ANGULAR DISTRIBUTION FOR ELASTIC SCATT. 2049800100025 WAS FIRST ANALYSED WITH A SPHERICAL OPTICAL 2049800100026 POTENTIAL. 2049800100027 - THE ANGULAR DISTRIBUTIONS BOTH FOR ELASTIC AND 2049800100028 INELASTIC SCATT. TO 1.77 MEV LEVEL WAS AFTERWARDS 2049800100029 ANALYSED WITH THE COUPLED-CHANNEL METHOD, IN THE 2049800100030 ADIABATIC APPROXIMATION. 2049800100031 MONITOR ABSOLUTE MEASUREMENT. THE NEUTRON FLUX DISTRIBUTION 2049800100032 ON THE SCATTERER PLANE WAS MEASURED BY SCANNING ITS 2049800100033 SURFACE IN STEPS OF 5 CM WITH A PLASTIC SCINTILLATOR 2049800100034 WHOSE EFFICIENCY WAS MEASURED WITH 1 PERCENT ERROR 2049800100035 PART-DET (N ) NEUTRONS. 2049800100036 STATUS DATA FROM TABLE I OF LETT.NUOVO CIMENTO,8(1973)249. 2049800100037 HISTORY (731031C) 2049800100038 (760315E) 2049800100039 CORRECTION DOUBLE SCATTERING CORRECTIONS, 12 PERC. FOR ELASTIC 2049800100040 SCATTERING AND 17 PERC. FOR INELASTIC ONE, WERE 2049800100041 CALCULATED WITH MONTE-CARLO METHOD. 2049800100042 ERR-ANALYS ERRORS ARE STATISTICAL. 2049800100043 ANGULAR RESOLUTION IS +-1.5 DEG. FWHM. 2049800100044 ENDBIB 42 0 2049800100045 COMMON 1 3 2049800100046 EN 2049800100047 MEV 2049800100048 1.4200E+01 2049800100049 ENDCOMMON 3 0 2049800100050 ENDSUBENT 49 0 2049800199999 SUBENT 20498002 19840120 00002049800200001 BIB 2 3 2049800200002 REACTION (14-SI-28(N,EL)14-SI-28,,DA) 2049800200003 HISTORY (731031C) 2049800200004 (760315E) 2049800200005 ENDBIB 3 0 2049800200006 NOCOMMON 0 0 2049800200007 DATA 4 8 2049800200008 COS-CM ANG-RSL DATA DATA-ERR 2049800200009 NO-DIM ADEG MB/SR MB/SR 2049800200010 -9.9945E-01 7.5000E-01 1.3000E+01 1.0000E+00 2049800200011 -9.9415E-01 7.5000E-01 1.1000E+01 9.0000E-01 2049800200012 -9.9189E-01 7.5000E-01 1.1000E+01 8.0000E-01 2049800200013 -9.6901E-01 7.5000E-01 1.1100E+01 9.0000E-01 2049800200014 -9.4551E-01 7.5000E-01 9.7000E+00 8.0000E-01 2049800200015 -9.0850E-01 7.5000E-01 8.4000E+00 8.0000E-01 2049800200016 -8.7964E-01 7.5000E-01 6.8000E+00 6.0000E-01 2049800200017 -8.3771E-01 7.5000E-01 6.7000E+00 6.0000E-01 2049800200018 ENDDATA 10 0 2049800200019 ENDSUBENT 18 0 2049800299999 SUBENT 20498003 19840120 00002049800300001 BIB 3 9 2049800300002 REACTION (14-SI-28(N,INL)14-SI-28,PAR,DA) 2049800300003 COMMENT LEVELS ARE THE FOLLOWING, 2049800300004 1ST 2+ 1.77 MEV, 2049800300005 2ND,3RD 4+,0+ 4.61 AND 4.97 MEV, (MIXED) 2049800300006 4TH 3+ 6.27 MEV, 2049800300007 5,6,7TH 0+,3-,4+ 6.69,6.88 AND 6.89 MEV,(MIXED) 2049800300008 8,9TH 1+,2+ 7.38 AND 7.41 MEV. (MIXED) 2049800300009 HISTORY (731031C) 2049800300010 (760315E) 2049800300011 ENDBIB 9 0 2049800300012 NOCOMMON 0 0 2049800300013 DATA 6 40 2049800300014 E-LVL-MAX E-LVL-MIN E-LVL COS-CM DATA DATA-ERR 2049800300015 MEV MEV MEV NO-DIM MB/SR MB/SR 2049800300016 1.7700E+00-9.9945E-01 1.5000E+00 5.0000E-012049800300017 1.7700E+00-9.9415E-01 1.4000E+00 4.0000E-012049800300018 1.7700E+00-9.9211E-01 1.9000E+00 5.0000E-012049800300019 1.7700E+00-9.6944E-01 2.5000E+00 5.0000E-012049800300020 1.7700E+00-9.4551E-01 3.2000E+00 6.0000E-012049800300021 1.7700E+00-9.0923E-01 3.8000E+00 6.0000E-012049800300022 1.7700E+00-8.7964E-01 4.1000E+00 5.0000E-012049800300023 1.7700E+00-8.3867E-01 5.0000E+00 5.0000E-012049800300024 4.9700E+00 4.6100E+00 -9.9945E-01 1.1000E+00 5.0000E-012049800300025 4.9700E+00 4.6100E+00 -9.9415E-01 1.3000E+00 5.0000E-012049800300026 4.9700E+00 4.6100E+00 -9.9211E-01 1.0000E+00 5.0000E-012049800300027 4.9700E+00 4.6100E+00 -9.6944E-01 1.4000E+00 5.0000E-012049800300028 4.9700E+00 4.6100E+00 -9.4608E-01 1.1000E+00 5.0000E-012049800300029 4.9700E+00 4.6100E+00 -9.0996E-01 1.4000E+00 5.0000E-012049800300030 4.9700E+00 4.6100E+00 -8.8130E-01 1.2000E+00 4.0000E-012049800300031 4.9700E+00 4.6100E+00 -8.4056E-01 1.0000E+00 4.0000E-012049800300032 6.2700E+00-9.9945E-01 2.6000E+00 7.0000E-012049800300033 6.2700E+00-9.9415E-01 1.9000E+00 6.0000E-012049800300034 6.2700E+00-9.9233E-01 1.2000E+00 4.0000E-012049800300035 6.2700E+00-9.6987E-01 1.5000E+00 5.0000E-012049800300036 6.2700E+00-9.4665E-01 1.1000E+00 5.0000E-012049800300037 6.2700E+00-9.1068E-01 1.7000E+00 6.0000E-012049800300038 6.2700E+00-8.8212E-01 1.5000E+00 5.0000E-012049800300039 6.2700E+00-8.4151E-01 7.0000E-01 4.0000E-012049800300040 6.8900E+00 6.6900E+00 -9.9945E-01 4.2000E+00 9.0000E-012049800300041 6.8900E+00 6.6900E+00 -9.9415E-01 2.3000E+00 7.0000E-012049800300042 6.8900E+00 6.6900E+00 -9.9233E-01 3.1000E+00 6.0000E-012049800300043 6.8900E+00 6.6900E+00 -9.6987E-01 3.8000E+00 7.0000E-012049800300044 6.8900E+00 6.6900E+00 -9.4721E-01 2.7000E+00 6.0000E-012049800300045 6.8900E+00 6.6900E+00 -9.1140E-01 3.0000E+00 6.0000E-012049800300046 6.8900E+00 6.6900E+00 -8.8294E-01 3.1000E+00 7.0000E-012049800300047 6.8900E+00 6.6900E+00 -8.4245E-01 2.1000E+00 5.0000E-012049800300048 7.4100E+00 7.3800E+00 -9.9945E-01 3.1000E+00 9.0000E-012049800300049 7.4100E+00 7.3800E+00 -9.9427E-01 1.6000E+00 7.0000E-012049800300050 7.4100E+00 7.3800E+00 -9.9233E-01 2.8000E+00 7.0000E-012049800300051 7.4100E+00 7.3800E+00 -9.7015E-01 2.5000E+00 7.0000E-012049800300052 7.4100E+00 7.3800E+00 -9.4721E-01 1.9000E+00 7.0000E-012049800300053 7.4100E+00 7.3800E+00 -9.1140E-01 2.3000E+00 8.0000E-012049800300054 7.4100E+00 7.3800E+00 -8.8335E-01 2.0000E+00 7.0000E-012049800300055 7.4100E+00 7.3800E+00 -8.4307E-01 2.5000E+00 7.0000E-012049800300056 ENDDATA 42 0 2049800300057 ENDSUBENT 56 0 2049800399999 ENDENTRY 3 0 2049899999999