ENTRY O0954 20151117 O056O095400000001 SUBENT O0954001 20151117 O056O095400100001 BIB 14 52 O095400100002 TITLE Neutron multiplicity distributions for 200-MeV proton, O095400100003 deuteron and He-4 induced spallation reactions in thickO095400100004 Pb-targets. O095400100005 AUTHOR (B.Lott, F.Cnigniet, J.Galin, F.Goldenbaum, D.Hilscher,O095400100006 A.Lienard, A.Peghaire, Y.Perier, X.Qian) O095400100007 INSTITUTE (2FR CAE) O095400100008 (2GERBER) O095400100009 REFERENCE (J,NIM/A,414,117,1998) O095400100010 REL-REF (M,O0848001,L.Pienkowski+,J,PR/C,56,1909,1997) Details O095400100011 of experiments. O095400100012 (M,O0953001,D.Hilscher+,J,NIM/A,414,100,1998) Details O095400100013 of experiments. O095400100014 SAMPLE The lead targets were 12-cm in diameter with thickness O095400100015 varying between 2 and 25 cm. O095400100016 ADD-RES (COMP) Monte-Carlo calculations. O095400100017 PART-DET (N) O095400100018 DETECTOR (D4PI) The 4pi-neutron detector, ORION, consists of O095400100019 five sectors filled with gadolinium-loaded liquid O095400100020 scintillator representing a total volume of 4 meter**3.O095400100021 (SCIN) 1. The light created within ORION is collected O095400100022 by means of 30 phototube. O095400100023 2. A 1-mm thick plastic scintillator for a 9-mm thick O095400100024 C-target and 95-MeV*a C-13 beam, positioned 57-cm O095400100025 upstream of the target in ORION's reaction chamber. O095400100026 This detector allowed for a full identification of the O095400100027 traversing particles by providing an energy-loss O095400100028 information and the stop signal of a time-of-flight O095400100029 measurement with respect to the cyclotron radio O095400100030 frequency. O095400100031 FACILITY (SYNCH,2ZZZCER) CERN-PS Accelerator. O095400100032 COMMENT -By authors. Thanks to the time difference in the O095400100033 prompt signal issued by ORION, a partial correction O095400100034 could be applied to the affected distributions, the O095400100035 associated uncertainty translating into larger error O095400100036 bars for the corresponding data. The mean values given O095400100037 in the following are corrected assuming a constant O095400100038 efficiency equal to that found for the Cf-neutrons, O095400100039 although high-energy neutrons may be produced in the O095400100040 reactions. However, this approximation appears quite O095400100041 justified in view of the large target thicknesses and O095400100042 the moderate energy of the impinging light particles, O095400100043 both factors leading to a soft energy spectrum of the O095400100044 leaking neutrons. It must be emphasized that this O095400100045 assumption was also employed in all previous moderator O095400100046 measurements of mean multiplicities. O095400100047 METHOD (TOF) O095400100048 STATUS (CURVE) By CAJAD. Data digitized from fig.4,5 of O095400100049 NIM/A,414,117,1998 O095400100050 HISTORY (20020415C) O095400100051 (20030514U) Last checking has been done. O095400100052 (20151117A) SD: SF5,SF6 were corrected in REACTION codeO095400100053 in Subents 002-004. O095400100054 ENDBIB 52 0 O095400100055 NOCOMMON 0 0 O095400100056 ENDSUBENT 55 0 O095400199999 SUBENT O0954002 20151117 O056O095400200001 BIB 4 10 O095400200002 REACTION (82-PB-208(P,X)0-NN-1,NUM,PY,,MSC) Fig.4 O095400200003 Multiplicity distribution for thick target. O095400200004 The distribution obtained for reaction events, selectedO095400200005 by requesting the ORION prompt signal in coincidence O095400200006 with the incident particles. O095400200007 SAMPLE Thick lead target, 25-cm thickness (range is 4.7 cm) O095400200008 and 12-cm in diameter, was used. O095400200009 ERR-ANALYS (ERR-DIG) Data-point reader uncertainty. O095400200010 HISTORY (20151117A) SD: SF5=NUM added, SF6=SIG/DN -> PY and O095400200011 SF8=REL -> MSC in REACTION code. O095400200012 ENDBIB 10 0 O095400200013 COMMON 2 3 O095400200014 EN ERR-DIG O095400200015 MEV PER-CENT O095400200016 197. 5. O095400200017 ENDCOMMON 3 0 O095400200018 DATA 3 21 O095400200019 PART-OUT DATA ERR-T O095400200020 NO-DIM ARB-UNITS PER-CENT O095400200021 0. 3.69E-03 O095400200022 1. 5.85E-03 O095400200023 2. 9.E-03 O095400200024 3. 1.25E-02 O095400200025 4. 1.6E-02 O095400200026 5. 1.92E-02 O095400200027 6. 1.97E-02 O095400200028 7. 1.85E-02 O095400200029 8. 1.58E-02 O095400200030 9. 1.3E-02 O095400200031 10. 9.3E-03 O095400200032 11. 6.36E-03 O095400200033 12. 3.99E-03 O095400200034 13. 2.28E-03 O095400200035 14. 1.15E-03 O095400200036 15. 4.69E-04 O095400200037 16. 2.44E-04 O095400200038 17. 7.5E-05 12. O095400200039 18. 2.5E-05 24. O095400200040 19. 6.E-06 70. O095400200041 20. 1.9E-06 70. O095400200042 ENDDATA 23 0 O095400200043 ENDSUBENT 42 0 O095400299999 SUBENT O0954003 20151117 O056O095400300001 BIB 4 10 O095400300002 REACTION (82-PB-208(D,X)0-NN-1,NUM,PY,,MSC) Fig.4 O095400300003 Multiplicity distribution for thick target. O095400300004 The distribution obtained for reaction events, selectedO095400300005 by requesting the ORION prompt signal in coincidence O095400300006 with the incident particles. O095400300007 SAMPLE Thick lead target, 20-cm thickness (range is 2.7 cm) O095400300008 and 12-cm in diameter, was used. O095400300009 ERR-ANALYS (ERR-DIG) Data-point reader uncertainty. O095400300010 HISTORY (20151117A) SD: SF5=NUM added, SF6=SIG/DN -> PY and O095400300011 SF8=REL -> MSC in REACTION code. O095400300012 ENDBIB 10 0 O095400300013 COMMON 2 3 O095400300014 EN ERR-DIG O095400300015 MEV PER-CENT O095400300016 188. 5. O095400300017 ENDCOMMON 3 0 O095400300018 DATA 3 20 O095400300019 PART-OUT DATA ERR-T O095400300020 NO-DIM ARB-UNITS PER-CENT O095400300021 0. 3.94E-03 O095400300022 1. 7.3E-03 O095400300023 2. 9.3E-03 O095400300024 3. 1.3E-02 O095400300025 4. 1.43E-02 O095400300026 5. 1.77E-02 O095400300027 6. 1.88E-02 O095400300028 7. 1.88E-02 O095400300029 8. 1.71E-02 O095400300030 9. 1.3E-02 O095400300031 10. 1.02E-02 O095400300032 11. 6.8E-03 O095400300033 12. 4.88E-03 O095400300034 13. 3.09E-03 O095400300035 14. 1.57E-03 O095400300036 15. 8.3E-04 O095400300037 16. 3.2E-04 19. O095400300038 17. 1.3E-04 40. O095400300039 18. 2.1E-05 70. O095400300040 19. 4.2E-05 40. O095400300041 ENDDATA 22 0 O095400300042 ENDSUBENT 41 0 O095400399999 SUBENT O0954004 20151117 O056O095400400001 BIB 4 10 O095400400002 REACTION (82-PB-208(A,X)0-NN-1,NUM,PY,,MSC) Fig.4 O095400400003 Multiplicity distribution for thick target. O095400400004 The distribution obtained for reaction events, selectedO095400400005 by requesting the ORION prompt signal in coincidence O095400400006 with the incident particles. O095400400007 SAMPLE Thick lead target, 25-cm thickness (range is 0.45 cm) O095400400008 and 12-cm in diameter, was used. O095400400009 ERR-ANALYS (ERR-DIG) Data-point reader uncertainty. O095400400010 HISTORY (20151117A) SD: SF5=NUM added, SF6=SIG/DN -> PY and O095400400011 SF8=REL -> MSC in REACTION code. O095400400012 ENDBIB 10 0 O095400400013 COMMON 2 3 O095400400014 EN ERR-DIG O095400400015 MEV PER-CENT O095400400016 214. 5. O095400400017 ENDCOMMON 3 0 O095400400018 DATA 3 17 O095400400019 PART-OUT DATA ERR-T O095400400020 NO-DIM ARB-UNITS PER-CENT O095400400021 0. 4.E-03 120. O095400400022 1. 1.2E-02 25. O095400400023 2. 8.6E-03 20. O095400400024 3. 2.01E-02 O095400400025 4. 2.56E-02 O095400400026 5. 3.17E-02 O095400400027 6. 3.58E-02 O095400400028 7. 3.69E-02 O095400400029 8. 3.8E-02 O095400400030 9. 3.37E-02 O095400400031 10. 2.2E-02 O095400400032 11. 1.58E-02 O095400400033 12. 1.13E-02 O095400400034 13. 8.8E-03 O095400400035 14. 2.9E-03 24. O095400400036 15. 2.2E-03 30. O095400400037 17. 1.3E-03 23. O095400400038 ENDDATA 19 0 O095400400039 ENDSUBENT 38 0 O095400499999 SUBENT O0954005 20030514 0000O095400500001 BIB 2 5 O095400500002 REACTION (82-PB-208(P,X)0-NN-1,,PY) Fig.5-lower panel O095400500003 mean neutron multiplicities corrected for background O095400500004 and efficiency. O095400500005 ERR-ANALYS (ERR-T) The uncertainty is shown by authors on figure. O095400500006 (ERR-DIG) Data-point reader uncertainty. O095400500007 ENDBIB 5 0 O095400500008 COMMON 2 3 O095400500009 EN ERR-DIG O095400500010 MEV PRT/INC O095400500011 197. 0.005 O095400500012 ENDCOMMON 3 0 O095400500013 DATA 3 6 O095400500014 THICKNESS DATA ERR-T O095400500015 G/CM-SQ PRT/INC PRT/INC O095400500016 22.7 0.83 4.E-02 O095400500017 34.05 1.108 2.E-02 O095400500018 56.75 1.374 O095400500019 113.5 1.433 O095400500020 227. 1.452 O095400500021 283.75 1.45 O095400500022 ENDDATA 8 0 O095400500023 ENDSUBENT 22 0 O095400599999 SUBENT O0954006 20030514 0000O095400600001 BIB 2 4 O095400600002 REACTION (82-PB-208(D,X)0-NN-1,,PY) Fig.5-lower panel O095400600003 mean neutron multiplicities corrected for background O095400600004 and efficiency. O095400600005 ERR-ANALYS (ERR-T) The uncertainty is shown by authors on figure. O095400600006 ENDBIB 4 0 O095400600007 COMMON 1 3 O095400600008 EN O095400600009 MEV O095400600010 188. O095400600011 ENDCOMMON 3 0 O095400600012 DATA 3 5 O095400600013 THICKNESS DATA ERR-T O095400600014 G/CM-SQ PRT/INC PRT/INC O095400600015 22.7 1.16 3.E-02 O095400600016 34.05 1.276 5.E-03 O095400600017 56.75 1.306 5.E-03 O095400600018 90.80 1.389 5.E-03 O095400600019 227. 1.434 5.E-03 O095400600020 ENDDATA 7 0 O095400600021 ENDSUBENT 20 0 O095400699999 SUBENT O0954007 20030514 0000O095400700001 BIB 2 4 O095400700002 REACTION (82-PB-208(P,X)0-NN-1,,PY) Fig.5-upper panel O095400700003 distribution assosiated with reaction events. O095400700004 ERR-ANALYS (ERR-T) The uncertainty is shown by authors on figure. O095400700005 (ERR-DIG) Data-point reader uncertainty. O095400700006 ENDBIB 4 0 O095400700007 COMMON 2 3 O095400700008 EN ERR-DIG O095400700009 MEV PRT/REAC O095400700010 197. 0.012 O095400700011 ENDCOMMON 3 0 O095400700012 DATA 3 6 O095400700013 THICKNESS DATA ERR-T O095400700014 G/CM-SQ PRT/REAC PRT/REAC O095400700015 22.7 6.7 0.4 O095400700016 34.05 6.91 0.2 O095400700017 56.75 6.88 8.E-02 O095400700018 113.5 7.213 O095400700019 227. 7.266 O095400700020 283.75 7.297 O095400700021 ENDDATA 8 0 O095400700022 ENDSUBENT 21 0 O095400799999 SUBENT O0954008 20030514 0000O095400800001 BIB 2 3 O095400800002 REACTION (82-PB-208(D,X)0-NN-1,,PY) Fig.5-upper panel O095400800003 distribution assosiated with reaction events. O095400800004 ERR-ANALYS (ERR-T) The uncertainty is reported by authors on fig. O095400800005 ENDBIB 3 0 O095400800006 COMMON 1 3 O095400800007 EN O095400800008 MEV O095400800009 188. O095400800010 ENDCOMMON 3 0 O095400800011 DATA 3 5 O095400800012 THICKNESS DATA ERR-T O095400800013 G/CM-SQ PRT/REAC PRT/REAC O095400800014 22.7 6.1 0.18 O095400800015 34.05 6.38 6.E-02 O095400800016 56.75 6.764 1.2E-02 O095400800017 90.80 6.896 1.2E-02 O095400800018 227. 7.326 1.2E-02 O095400800019 ENDDATA 7 0 O095400800020 ENDSUBENT 19 0 O095400899999 ENDENTRY 8 0 O095499999999