ENTRY O0651 19990527 0000O065100000001 SUBENT O0651001 19990527 0000O065100100001 BIB 13 60 O065100100002 TITLE A Facility For Studies of Neutron-Induced Reactions in O065100100003 The 50-200 MeV Range O065100100004 AUTHOR (H.CONDE,S.HULTQVIST,N.OLSSON,T.ROENNQVIST,R.ZORRO, O065100100005 J.BLOMGREN,G.TIBELL,A.HAKANSSON,O.JONSSON,A.LINDHOLM, O065100100006 L.NILSSON,P.-U.RENBERG,A.BROCKSTEDT,P.EKSTROEM, O065100100007 M.OSTELUND,F.P.BRADY,Z.SZEFLINSKI) O065100100008 INSTITUTE (2SWDUPP,2SWDLND,1USADAV,3POLWWA) O065100100009 REFERENCE (J,NIM/A,292,121,1990) O065100100010 REL-REF (R,,R.A.ARNDT+,J,PR/D,28,97,1983) The Computer Code O065100100011 Said O065100100012 Was Used For Calculation of N-P Cross Sections Needed O065100100013 For Reconstruction of Neutron Spectrum. O065100100014 ADD-RES C-12(N,P)B-12 Double Differential Cross Section at a O065100100015 Neutron Energy of 100 MeV. O065100100016 FACILITY (CYCLO,2SWDUPP) Gustaf Werner Cyclotron of the O065100100017 Svedberg Laboratory, Uppsala. O065100100018 SAMPLE 7-Li Discs, 100-200 Mg/Cm2 Thick, 99.984% Enrichment, O065100100019 Were Used For Neutron Production. O065100100020 Four 95-Mg/Cm2 Thick Targets of C-H-2 or Four 85- O065100100021 Mg/Cm2 Thick Carbon Targets, and a Reference 50-Mg/Cm2 O065100100022 C-H-2 Foil were Used For Measurements of Neutron O065100100023 Energy Spectrum by Means of N-P Reaction. O065100100024 DETECTOR (MWPC) Multiwire Proportional Chambers were Mounted O065100100025 Between the C-H-2 and Carbon Targets to Determine in O065100100026 Which Layer the Reaction Occurs and Thus to Correct O065100100027 For the Energy Losses of the Recoil Protons in the O065100100028 Subsequent Targets. O065100100029 (MAGSP) Dipole Magnet For Momentum Analysis of Recoil O065100100030 Protons. O065100100031 (MWPC) Four Position-Sensitive Drift Chambers, Two in O065100100032 Front and Two Behind the Dipole Magnet, are Used to O065100100033 Determine the Energy and Emission Angle of the Recoil O065100100034 Protons. O065100100035 (COIN,SCIN,SCIN,SCIN) The Event was Generated by O065100100036 Triple Coincidence Between Plastic Scintillators: a O065100100037 Thin One Placed Downstream the N-P Targets and Two O065100100038 Thicker Ones Behind the Last Drift Chamber. O065100100039 METHOD (EXTB,SITA) Proton Beam Focussed to a Diameter of O065100100040 About 5 mm in the Lithium Target. The Unaffected O065100100041 Proton Beam was Bent by a Magnet Into a Well-Shielded O065100100042 Beam Dump, While the Neutrons were Collimated in a O065100100043 Narrow Cone at 0 Degrees by a Collimator System, O065100100044 Before Entering the Experimental Area About 8 M After O065100100045 The Production Target. The Neutron Beam Spot at the O065100100046 Irradiation Position had a Diameter of 7 Cm. O065100100047 (TOF,COINC,PHD). O065100100048 CORRECTION Performed: Events Due to Protons Contaminating the O065100100049 Neutron Beam, and Due to N-P Reactions in Construction O065100100050 Materials. O065100100051 ANALYSIS Recoil Proton Spectra from Neutron Scattering on O065100100052 Hydrogen were Obtained by Subtracting Carbon Spectra O065100100053 From Those of C-H-2 After Normalization. Then the O065100100054 Neutron Spectrum was Reconstructed with the Use of N-P O065100100055 Cross Section Values - See Rel-Ref. O065100100056 HISTORY (19990403C) By Khlopin Radium Institute - A.P. O065100100057 (19990414A) Add-Res is Added. Reaction Line is O065100100058 Corrected O065100100059 By CAJAD. O065100100060 (19990414U) Last checking has been done. O065100100061 (19990527A) DATE is corrected O065100100062 ENDBIB 60 0 O065100100063 NOCOMMON 0 0 O065100100064 ENDSUBENT 63 0 O065100199999 SUBENT O0651002 19990527 0000O065100200001 BIB 5 10 O065100200002 REACTION (3-LI-7(P,X)0-NN-1,,DA/DE,,REL) O065100200003 Neutron Spectrum was Reconstructed from the One of O065100200004 Recoil Protons Using a Proton Spectrum in the Range 0-5O065100200005 Degrees, Obtained with a C-H-2 Target, and Subtracting O065100200006 The Contribution from C-12(N,P)B-12 Reaction. O065100200007 PART-DET (P) Immediately Detected Particle. O065100200008 EN-SEC (E,N) O065100200009 ERR-ANALYS (DATA-ERR) Data-Point Reader Uncertainty. O065100200010 No Analysis is Given by Authors. O065100200011 STATUS (CURVE) From Fig.8a Digitized by Compiler. O065100200012 ENDBIB 10 0 O065100200013 COMMON 3 3 O065100200014 EN-APRX ANG DATA-ERR O065100200015 MEV ADEG ARB-UNITS O065100200016 100. 0. 0.8 O065100200017 ENDCOMMON 3 0 O065100200018 DATA 2 87 O065100200019 E DATA O065100200020 MEV ARB-UNITS O065100200021 61.25 33.5 O065100200022 61.75 37. O065100200023 62.25 28. O065100200024 62.75 26.2 O065100200025 63.25 32.1 O065100200026 63.75 20.2 O065100200027 64.25 31.7 O065100200028 64.75 26. O065100200029 65.25 26.1 O065100200030 65.75 29.2 O065100200031 66.25 25.5 O065100200032 66.75 28.8 O065100200033 67.25 26.6 O065100200034 67.75 26.9 O065100200035 68.25 36.8 O065100200036 68.75 28.2 O065100200037 69.25 29.5 O065100200038 69.75 35.5 O065100200039 70.25 27.3 O065100200040 70.75 17.9 O065100200041 71.25 29.5 O065100200042 71.75 25. O065100200043 72.25 26.1 O065100200044 72.75 28.9 O065100200045 73.25 34.5 O065100200046 73.75 26.1 O065100200047 74.25 24.1 O065100200048 74.75 24.7 O065100200049 75.25 22.2 O065100200050 75.75 30.5 O065100200051 76.25 27.9 O065100200052 76.75 20. O065100200053 77.25 25.3 O065100200054 77.75 25.5 O065100200055 78.25 29.1 O065100200056 78.75 39.7 O065100200057 79.25 18.6 O065100200058 79.75 29. O065100200059 80.25 21.1 O065100200060 80.75 24.8 O065100200061 81.25 27.8 O065100200062 81.75 29.8 O065100200063 82.25 20.5 O065100200064 82.75 27.4 O065100200065 83.25 25.6 O065100200066 83.75 33.1 O065100200067 84.25 20.6 O065100200068 84.75 21. O065100200069 85.25 23.2 O065100200070 85.75 14. O065100200071 86.25 27.6 O065100200072 86.75 28.5 O065100200073 87.25 26. O065100200074 87.75 24.3 O065100200075 88.25 25.3 O065100200076 88.75 22.6 O065100200077 89.25 27.8 O065100200078 89.75 18. O065100200079 90.25 19. O065100200080 90.75 25. O065100200081 91.25 18.9 O065100200082 91.75 18. O065100200083 92.25 13.2 O065100200084 92.75 19.7 O065100200085 93.25 14.2 O065100200086 93.75 17.8 O065100200087 94.25 23.4 O065100200088 94.75 42.4 O065100200089 95.25 35.5 O065100200090 95.75 50.2 O065100200091 96.25 83.5 O065100200092 96.75 134.8 O065100200093 97.25 201.3 O065100200094 97.75 285.1 O065100200095 98.25 342.5 O065100200096 98.75 336.5 O065100200097 99.25 332. O065100200098 99.75 267.3 O065100200099 100.25 175. O065100200100 100.75 83.2 O065100200101 101.25 55.7 O065100200102 101.75 39.3 O065100200103 102.25 18. O065100200104 102.75 11.4 O065100200105 103.25 13.9 O065100200106 103.75 9.8 O065100200107 104.25 1.9 O065100200108 ENDDATA 89 0 O065100200109 ENDSUBENT 108 0 O065100299999 ENDENTRY 2 0 O065199999999