ENTRY A0496 20030522 0000A049600000001 SUBENT A0496001 20030522 0000A049600100001 BIB 10 48 A049600100002 TITLE Neutron yields and emission rates of 50 MeV/U 18-O-ion A049600100003 on thick Be, Cu and Au targets. A049600100004 AUTHOR (Guisheng Li, Tianmei Zhang, Zongwei Li, Youwu Su, A049600100005 Shumin Zhang) A049600100006 INSTITUTE (3CPRIMP) A049600100007 REFERENCE (J,NIM/A,404,349,1998) A049600100008 COMMENT - By authors. A049600100009 1. The total neutron yield and neutron emission rate A049600100010 depend upon the atomic number of the target nucleus, A049600100011 that of lighter targets are greater than that of A049600100012 heavier targets when the incident ion energies per A049600100013 nucleon are identical. A049600100014 2. While using two different ions with identical energyA049600100015 per nucleon, e.g. 50 MeV/U 12-C and 18-O, to bombard A049600100016 the same target, the total neutron yield of 18-O ion A049600100017 greater than that of 12-C. A049600100018 3. In the three reaction studied, 18-O and 9-Be are A049600100019 neutron-rich nuclei and the excitation energy of resultA049600100020 nucleus produced by 18-O+Be is greater markedly than A049600100021 that produced by 18-O+Cu and 18-O+Au. A049600100022 4. The variation regulation of neutron emission rates A049600100023 in the forward direction 2*pi solid-angle are similar A049600100024 to that of neutron yield. A049600100025 FACILITY (ACCEL,3CPRIMP) The experiment was carried out A049600100026 at HIRFL. A049600100027 DETECTOR (THRES) A049600100028 Used threshold detectors to be: A049600100029 1. High purity Al. REACTION 13-AL-27(N,A)11-NA-24. A049600100030 Threshold energy - 7 MeV A049600100031 2. Teflon. Reaction 9-F-19(N,2N)9-F-18 . Threshold A049600100032 energy - 11 MeV; A049600100033 3. Polythene. Reaction 6-C-12(N,2N)6-C-11 . ThresholdA049600100034 energy -20 MeV; A049600100035 4. High purity Al. Reaction 13-AL-27(N,4P6N)9-F-18 . A049600100036 Threshold energy - 50 MeV. A049600100037 (HPGE) For measurement the activities of irradiated A049600100038 samples. The efficiency of the system was calibratedA049600100039 using a standard 152-Eu gamma-source. A049600100040 SAMPLE The thickness of Be, Cl, Au targets are greater than A049600100041 the ranges of the 18-O-ions. A049600100042 METHOD (SITA) A049600100043 (BCINT) A049600100044 (EXTB) A 50 MeV/U 18-O-ion beam passes through a hole A049600100045 in a concrete shielding wall and a deflecting magnet. A049600100046 Then through a pair of quadrupole lenses and a A049600100047 collimating slit into a experimental chamber. A049600100048 HISTORY (20030521C) A049600100049 (20030522U) Last checking has been done. A049600100050 ENDBIB 48 0 A049600100051 COMMON 1 3 A049600100052 EN A049600100053 MEV A049600100054 900. A049600100055 ENDCOMMON 3 0 A049600100056 ENDSUBENT 55 0 A049600199999 SUBENT A0496002 20030522 0000A049600200001 BIB 4 4 A049600200002 REACTION (4-BE-9(8-O-18,X)0-NN-1,PAR,PY,,TT) A049600200003 EN-SEC (E-MIN,N) A049600200004 ANALYSIS (INTAD) A049600200005 STATUS (DEP,A0496008) A049600200006 ENDBIB 4 0 A049600200007 NOCOMMON 0 0 A049600200008 DATA 2 4 A049600200009 E-MIN DATA A049600200010 MEV PRT/INC A049600200011 7. 42.6E-02 A049600200012 11. 26.E-02 A049600200013 20. 8.2E-02 A049600200014 50. 3.6E-02 A049600200015 ENDDATA 6 0 A049600200016 ENDSUBENT 15 0 A049600299999 SUBENT A0496003 20030522 0000A049600300001 BIB 4 4 A049600300002 REACTION (29-CU-0(8-O-18,X)0-NN-1,PAR,PY,,TT) A049600300003 EN-SEC (E-MIN,N) A049600300004 ANALYSIS (INTAD) A049600300005 STATUS (DEP,A0496009) A049600300006 ENDBIB 4 0 A049600300007 NOCOMMON 0 0 A049600300008 DATA 2 4 A049600300009 E-MIN DATA A049600300010 MEV PRT/INC A049600300011 7. 19.2E-02 A049600300012 11. 9.1E-02 A049600300013 20. 3.E-02 A049600300014 50. 1.7E-02 A049600300015 ENDDATA 6 0 A049600300016 ENDSUBENT 15 0 A049600399999 SUBENT A0496004 20030522 0000A049600400001 BIB 4 4 A049600400002 REACTION (79-AU-197(8-O-18,X)0-NN-1,PAR,PY,,TT) A049600400003 EN-SEC (E-MIN,N) A049600400004 ANALYSIS (INTAD) A049600400005 STATUS (DEP,A0496010) A049600400006 ENDBIB 4 0 A049600400007 NOCOMMON 0 0 A049600400008 DATA 2 4 A049600400009 E-MIN DATA A049600400010 MEV PRT/INC A049600400011 7. 14.5E-02 A049600400012 11. 6.9E-02 A049600400013 20. 3.1E-02 A049600400014 50. 1.6E-02 A049600400015 ENDDATA 6 0 A049600400016 ENDSUBENT 15 0 A049600499999 SUBENT A0496005 20030522 0000A049600500001 BIB 3 3 A049600500002 REACTION (4-BE-9(8-O-18,X)0-NN-1,,PY,,TT) A049600500003 STATUS (DEP,A0496002) A049600500004 ANALYSIS (INTED) A049600500005 ENDBIB 3 0 A049600500006 NOCOMMON 0 0 A049600500007 DATA 1 1 A049600500008 DATA A049600500009 PRT/INC A049600500010 54.8 A049600500011 ENDDATA 3 0 A049600500012 ENDSUBENT 11 0 A049600599999 SUBENT A0496006 20030522 0000A049600600001 BIB 3 3 A049600600002 REACTION (29-CU-0(8-O-18,X)0-NN-1,,PY,,TT) A049600600003 ANALYSIS (INTED) A049600600004 STATUS (DEP,A0496003) A049600600005 ENDBIB 3 0 A049600600006 NOCOMMON 0 0 A049600600007 DATA 1 1 A049600600008 DATA A049600600009 PRT/INC A049600600010 20.7 A049600600011 ENDDATA 3 0 A049600600012 ENDSUBENT 11 0 A049600699999 SUBENT A0496007 20030522 0000A049600700001 BIB 3 3 A049600700002 REACTION (79-AU-197(8-O-18,X)0-NN-1,,PY,,TT) A049600700003 ANALYSIS (INTED) A049600700004 STATUS (DEP,A0496004) A049600700005 ENDBIB 3 0 A049600700006 NOCOMMON 0 0 A049600700007 DATA 1 1 A049600700008 DATA A049600700009 PRT/INC A049600700010 14.9 A049600700011 ENDDATA 3 0 A049600700012 ENDSUBENT 11 0 A049600799999 SUBENT A0496008 20030522 0000A049600800001 BIB 4 6 A049600800002 REACTION (4-BE-9(8-O-18,X)0-NN-1,PAR,DA,,TT/REL) A049600800003 EN-SEC (E-MIN,N) A049600800004 STATUS (CURVE) By CAJAD. A049600800005 ERR-ANALYS (ANG-ERR) Data point reader uncertainty A049600800006 (ERR-T) The uncertainty is shown on figure without anyA049600800007 analysis A049600800008 ENDBIB 6 0 A049600800009 COMMON 1 3 A049600800010 ANG-ERR A049600800011 ADEG A049600800012 0.5 A049600800013 ENDCOMMON 3 0 A049600800014 DATA 4 24 A049600800015 ANG E-MIN DATA ERR-T A049600800016 ADEG MEV ARB-UNITS PER-CENT A049600800017 0. 7. 24000. 17. A049600800018 0. 11. 18600. 13. A049600800019 0. 20. 11200. 17. A049600800020 0. 50. 3300. 18. A049600800021 30. 7. 10800. 13. A049600800022 30. 11. 5800. 10. A049600800023 30. 20. 2200. 18. A049600800024 30. 50. 1200. 21. A049600800025 60. 7. 3000. 17. A049600800026 60. 11. 950. 15. A049600800027 60. 20. 340. 18. A049600800028 60. 50. 230. 30. A049600800029 90. 7. 820. 16. A049600800030 90. 11. 260. 19. A049600800031 90. 20. 98. 17. A049600800032 90. 50. 38. 50. A049600800033 120. 7. 440. 20. A049600800034 120. 11. 97. 21. A049600800035 120. 20. 40. 18. A049600800036 120. 50. 16. 30. A049600800037 150. 7. 300. 20. A049600800038 150. 11. 76. 18. A049600800039 150. 20. 21. 29. A049600800040 150. 50. 7.2 30. A049600800041 ENDDATA 26 0 A049600800042 ENDSUBENT 41 0 A049600899999 SUBENT A0496009 20030522 0000A049600900001 BIB 4 6 A049600900002 REACTION (29-CU-0(8-O-18,X)0-NN-1,PAR,DA,,TT/REL) A049600900003 EN-SEC (E-MIN,N) A049600900004 STATUS (CURVE) By CAJAD. A049600900005 ERR-ANALYS (ANG-ERR) Data point reader uncertainty A049600900006 (ERR-T) The uncertainty is shown on figure without anyA049600900007 analysis A049600900008 ENDBIB 6 0 A049600900009 COMMON 1 3 A049600900010 ANG-ERR A049600900011 ADEG A049600900012 0.5 A049600900013 ENDCOMMON 3 0 A049600900014 DATA 4 24 A049600900015 ANG E-MIN DATA ERR-T A049600900016 ADEG MEV ARB-UNITS PER-CENT A049600900017 0. 7. 9000. 17. A049600900018 0. 11. 6500. 15. A049600900019 0. 20. 2700. 19. A049600900020 0. 50. 1700. 24. A049600900021 30. 7. 4500. 16. A049600900022 30. 11. 2080. 11. A049600900023 30. 20. 650. 18. A049600900024 30. 50. 380. 29. A049600900025 60. 7. 1900. 16. A049600900026 60. 11. 570. 18. A049600900027 60. 20. 190. 21. A049600900028 60. 50. 105. 28. A049600900029 90. 7. 660. 17. A049600900030 90. 11. 180. 17. A049600900031 90. 20. 50. 24. A049600900032 90. 50. 34. 24. A049600900033 120. 7. 440. 18. A049600900034 120. 11. 67. 18. A049600900035 120. 20. 28. 40. A049600900036 120. 50. 15.2 14. A049600900037 150. 7. 320. 19. A049600900038 150. 11. 50. 22. A049600900039 150. 20. 20. 25. A049600900040 150. 50. 9.5 22. A049600900041 ENDDATA 26 0 A049600900042 ENDSUBENT 41 0 A049600999999 SUBENT A0496010 20030522 0000A049601000001 BIB 4 6 A049601000002 REACTION (79-AU-197(8-O-18,X)0-NN-1,PAR,DA,,TT/REL) A049601000003 EN-SEC (E-MIN,N) A049601000004 STATUS (CURVE) By CAJAD. A049601000005 ERR-ANALYS (ANG-ERR) Data point reader uncertainty A049601000006 (ERR-T) The uncertainty is shown on figure without anyA049601000007 analysis A049601000008 ENDBIB 6 0 A049601000009 COMMON 1 3 A049601000010 ANG-ERR A049601000011 ADEG A049601000012 0.5 A049601000013 ENDCOMMON 3 0 A049601000014 DATA 4 24 A049601000015 ANG E-MIN DATA ERR-T A049601000016 ADEG MEV ARB-UNITS PER-CENT A049601000017 0. 7. 5800. 17. A049601000018 0. 11. 4200. 17. A049601000019 0. 20. 2600. 19. A049601000020 0. 50. 1110. 23. A049601000021 30. 7. 2900. 14. A049601000022 30. 11. 1290. 12. A049601000023 30. 20. 670. 18. A049601000024 30. 50. 380. 26. A049601000025 60. 7. 1620. 17. A049601000026 60. 11. 540. 15. A049601000027 60. 20. 150. 27. A049601000028 60. 50. 87. 30. A049601000029 90. 7. 920. 16. A049601000030 90. 11. 210. 19. A049601000031 90. 20. 98. 24. A049601000032 90. 50. 55. 30. A049601000033 120. 7. 370. 19. A049601000034 120. 11. 76. 13. A049601000035 120. 20. 52. 25. A049601000036 120. 50. 21. 29. A049601000037 150. 7. 250. 20. A049601000038 150. 11. 51. 18. A049601000039 150. 20. 33. 27. A049601000040 150. 50. 11. 27. A049601000041 ENDDATA 26 0 A049601000042 ENDSUBENT 41 0 A049601099999 ENDENTRY 10 0 A049699999999