ENTRY A0459 20030715 0000A045900000001 SUBENT A0459001 20030715 0000A045900100001 BIB 13 53 A045900100002 TITLE Complete and incomplete fusion reactions in the 12-C +A045900100003 169-Tm A045900100004 AUTHOR (S.Chakrabarty, B.S.Tomar, A.Goswami, G.K.Gubbi, A045900100005 S.B.Manohar, Anil Sharma, B.Bindukumar, S.Mukherjee) A045900100006 INSTITUTE (3INDTRM) Radiochemistry division A045900100007 (3INDIND) School of studies in physics, Vikram A045900100008 university A045900100009 REFERENCE (J,NP/A,678,355,2000) A045900100010 SAMPLE For the excitation function measurements, A045900100011 self-supporting metal foils of thulium having thicknessA045900100012 around 1 mg/cm**2 backed by 2 mg/cm**2 thick aluminium A045900100013 catcher foils were bombarded with 12-C beam. In each A045900100014 irradiation a stack of two such target catcher A045900100015 assemblies was used. A045900100016 DETECTOR (HPGE) A045900100017 FACILITY (VDGT,3INDTRM) A045900100018 METHOD (STTA) See sample A045900100019 (ACTIV) The duration of irradiation was about one hourA045900100020 with the total charge collection of about 400 micro A045900100021 Coulombs A045900100022 (BCINT) Measured using an electron suppressed Faraday A045900100023 cup placed behind the target-catcher assembly. A045900100024 (GSPEC) The time elapsed between the stoppage of beam A045900100025 and the start of counting of the sample on detector A045900100026 was about 5 minutes. Thus the excitation function A045900100027 measurements could be carried out only for evaporation A045900100028 residues having half-life more than 5 minutes. A045900100029 Initially the counting time was kept as 100 seconds andA045900100030 was subsequently increased to longer periods for A045900100031 counting long-lived products. A045900100032 COMMENT -By authors. The radioactivity produced due to A045900100033 bombardment of aluminium catcher foil by the 12-C beam A045900100034 is due to 146 KeV gamma-ray of 34-Cl-m which has a A045900100035 half-life of 32 min. This does not interfere with A045900100036 gamma-ray energies of interest. All other reaction A045900100037 products of 12-C + 27-Al do not have suitable half A045900100038 lives or gamma-rays so as to cause any interference A045900100039 with the gamma-rays of interest. A045900100040 HISTORY (20021220C) A045900100041 (20030123R) Data tables are received from S.ChakrabartyA045900100042 (20030714A) Subentry A0459008 is corrected. A045900100043 (20030715U) Last checking has been done. A045900100044 ERR-ANALYS (ERR-T) The errors on the cross section values are in A045900100045 the range of 10-20%. The major factors contributing toA045900100046 the errors are that due to the target thickness (5%), A045900100047 detection efficiency (5%) and statistical and fitting A045900100048 error on the peak area (1-15%). A045900100049 (EN-ERR) The uncertainty is shown on figure without A045900100050 any analysis. A045900100051 ADD-RES (RANGE) A045900100052 Complete and incomplete fusion cross sections for some A045900100053 products. A045900100054 STATUS (TABLE) A045900100055 ENDBIB 53 0 A045900100056 COMMON 1 3 A045900100057 EN-ERR A045900100058 MEV A045900100059 1.1 A045900100060 ENDCOMMON 3 0 A045900100061 ENDSUBENT 60 0 A045900199999 SUBENT A0459002 20030124 0000A045900200001 BIB 4 6 A045900200002 REACTION (69-TM-169(6-C-12,3N)75-RE-178,,SIG) A045900200003 DECAY-DATA (75-RE-178,13.2MIN,DG,237.,0.447) A045900200004 COMMENT - By authors. The experiment shows that the rhenium A045900200005 products are formed only by deexcitation of the A045900200006 compound nucleus, Re-181, in complete fusion reaction. A045900200007 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900200008 ENDBIB 6 0 A045900200009 NOCOMMON 0 0 A045900200010 DATA 4 5 A045900200011 EN DATA ERR-T MISC A045900200012 MEV MB MB MB A045900200013 60. 163.8 3.5 142.71 A045900200014 65.3 132.8 10. 63.9 A045900200015 68.6 63.9 5.7 28.06 A045900200016 74. 28.9 3.1 6.36 A045900200017 78.8 7.1 2.5 1.46 A045900200018 ENDDATA 7 0 A045900200019 ENDSUBENT 18 0 A045900299999 SUBENT A0459003 20030124 0000A045900300001 BIB 4 6 A045900300002 REACTION (69-TM-169(6-C-12,4N)75-RE-177,,SIG) A045900300003 DECAY-DATA (75-RE-177,14.MIN,DG,197.,0.084) A045900300004 COMMENT - By authors. The experiment shows that the rhenium A045900300005 products are formed only by deexcitation of the A045900300006 compound nucleus, Re-181, in complete fusion reaction. A045900300007 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900300008 ENDBIB 6 0 A045900300009 NOCOMMON 0 0 A045900300010 DATA 4 6 A045900300011 EN DATA ERR-T MISC A045900300012 MEV MB MB MB A045900300013 60. 128.6 10.6 155.79 A045900300014 65.3 509.4 21.3 482.44 A045900300015 68.6 505.3 23.5 640.37 A045900300016 74. 600.7 38.5 601.48 A045900300017 78.8 284.5 27.7 330.63 A045900300018 83.5 150.3 8.1 145.3 A045900300019 ENDDATA 8 0 A045900300020 ENDSUBENT 19 0 A045900399999 SUBENT A0459004 20030124 0000A045900400001 BIB 4 6 A045900400002 REACTION (69-TM-169(6-C-12,5N)75-RE-176,,SIG) A045900400003 DECAY-DATA (75-RE-176,5.7MIN,DG,240.6,0.48) A045900400004 COMMENT - By authors. The experiment shows that the rhenium A045900400005 products are formed only by deexcitation of the A045900400006 compound nucleus, Re-181, in complete fusion reaction.A045900400007 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900400008 ENDBIB 6 0 A045900400009 NOCOMMON 0 0 A045900400010 DATA 4 4 A045900400011 EN DATA ERR-T MISC A045900400012 MEV MB MB MB A045900400013 68.6 40. 4. 5.77 A045900400014 74. 231. 14. 244.08 A045900400015 78.8 488. 28. 651.43 A045900400016 83.5 725. 15. 823.38 A045900400017 ENDDATA 6 0 A045900400018 ENDSUBENT 17 0 A045900499999 SUBENT A0459005 20030124 0000A045900500001 BIB 4 9 A045900500002 REACTION (69-TM-169(6-C-12,X)73-TA-175,CUM,SIG) X=2P+4N A045900500003 DECAY-DATA (73-TA-175,10.5HR,DG,348.5,0.123) A045900500004 COMMENT - By authors. The experimental data are much higher A045900500005 than calculated data indicating the contribution from A045900500006 incomplete fusion reaction. These reactions can be of A045900500007 the type 169-Tm(C-12, alpha)177-Ta(*). The excited A045900500008 177-Ta nucleus may subsequently deexcite by neutron A045900500009 emission to give 175, 174, 173-Ta. A045900500010 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900500011 ENDBIB 9 0 A045900500012 NOCOMMON 0 0 A045900500013 DATA 4 5 A045900500014 EN DATA ERR-T MISC A045900500015 MEV MB MB MB A045900500016 60. 22.4 10. 2.15 A045900500017 65.3 34.4 7. 4.3 A045900500018 68.6 23.5 3.5 3.23 A045900500019 74. 26.8 8.2 0.9 A045900500020 78.8 3. 0.75 A045900500021 ENDDATA 7 0 A045900500022 ENDSUBENT 21 0 A045900599999 SUBENT A0459006 20030124 0000A045900600001 BIB 4 9 A045900600002 REACTION (69-TM-169(6-C-12,X)73-TA-174,CUM,SIG) X=2P+5N A045900600003 DECAY-DATA (73-TA-174,63.2MIN,DG,206.5,0.577) A045900600004 COMMENT - By authors. The experimental data are much higher A045900600005 than calculated data indicating the contribution from A045900600006 incomplete fusion reaction. These reactions can be of A045900600007 the type 169-Tm(C-12, alpha)177-Ta(*). The excited A045900600008 177-Ta nucleus may subsequently deexcite by neutron A045900600009 emission to give 175, 174, 173-Ta. A045900600010 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900600011 ENDBIB 9 0 A045900600012 NOCOMMON 0 0 A045900600013 DATA 4 6 A045900600014 EN DATA ERR-T MISC A045900600015 MEV MB MB MB A045900600016 60. 2.1 0.5 A045900600017 65.3 18.7 1.5 2.26 A045900600018 68.6 27.7 2.15 7.95 A045900600019 74. 64.4 2.5 13.36 A045900600020 78.8 62.9 7.1 12.89 A045900600021 83.5 58. 2.6 12.51 A045900600022 ENDDATA 8 0 A045900600023 ENDSUBENT 22 0 A045900699999 SUBENT A0459007 20030124 0000A045900700001 BIB 4 9 A045900700002 REACTION (69-TM-169(6-C-12,X)73-TA-173,CUM,SIG) X=2P+6N A045900700003 DECAY-DATA (73-TA-173,3.14HR,DG,172.2,0.175) A045900700004 COMMENT - By authors. The experimental data are much higher A045900700005 than calculated data indicating the contribution from A045900700006 incomplete fusion reaction. These reactions can be of A045900700007 the type 169-Tm(C-12, alpha)177-Ta(*). The excited A045900700008 177-Ta nucleus may subsequently deexcite by neutron A045900700009 emission to give 175, 174, 173-Ta. A045900700010 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900700011 ENDBIB 9 0 A045900700012 NOCOMMON 0 0 A045900700013 DATA 4 5 A045900700014 EN DATA ERR-T MISC A045900700015 MEV MB MB MB A045900700016 65.3 7.3 3.5 A045900700017 68.6 6.3 2.6 A045900700018 74. 15. 5.2 5.65 A045900700019 78.8 35.5 4.1 12.58 A045900700020 83.5 67.9 9.5 24.1 A045900700021 ENDDATA 7 0 A045900700022 ENDSUBENT 21 0 A045900799999 SUBENT A0459008 20030715 0000A045900800001 BIB 3 9 A045900800002 REACTION (69-TM-169(6-C-12,X)71-LU-172-G,IND/M+,SIG) A045900800003 DECAY-DATA (71-LU-172-G,6.7D,DG,1093.6,0.624) A045900800004 COMMENT - By compiler. Lu-172 production due to Hf-172 decay isA045900800005 negligible, because half-life of Hf-172 is equal 1.87 A045900800006 years. A045900800007 - By authors. The calculated cross section is A045900800008 negligible compared to experimental data. This shows A045900800009 that 172-Lu and 171-Lu are formed purely by incomplete A045900800010 fusion reaction such as 169-Tm(C-12,Be-8)173-Lu. A045900800011 ENDBIB 9 0 A045900800012 NOCOMMON 0 0 A045900800013 DATA 3 6 A045900800014 EN DATA ERR-T A045900800015 MEV MB MB A045900800016 60. 9.7 0.5 A045900800017 65.3 19.2 1.2 A045900800018 68.6 17.2 1.1 A045900800019 74. 25.6 1.7 A045900800020 78.8 20.2 1. A045900800021 83.5 16.4 1.9 A045900800022 ENDDATA 8 0 A045900800023 ENDSUBENT 22 0 A045900899999 SUBENT A0459009 20030124 0000A045900900001 BIB 4 7 A045900900002 REACTION (69-TM-169(6-C-12,X)71-LU-171,CUM,SIG) A045900900003 DECAY-DATA (71-LU-171-G,8.24D,DG,739.8,0.478) A045900900004 COMMENT - By authors. The calculated cross sectio is negligibleA045900900005 compared to experimental data. This shows that 172-Lu A045900900006 and 171-Lu are formed purely by incomplete fusion A045900900007 reaction such as 169-Tm(C-12,Be-8)173-Lu. A045900900008 MISC-COL (MISC) The fitted data obtained using PACE2 code. A045900900009 ENDBIB 7 0 A045900900010 NOCOMMON 0 0 A045900900011 DATA 4 6 A045900900012 EN DATA ERR-T MISC A045900900013 MEV MB MB MB A045900900014 60. 2.96 0.25 A045900900015 65.3 8.6 1. A045900900016 68.6 10.4 0.8 A045900900017 74. 24.4 1.8 A045900900018 78.8 30.5 1.2 0.1 A045900900019 83.5 35.1 2.7 0.35 A045900900020 ENDDATA 8 0 A045900900021 ENDSUBENT 20 0 A045900999999 SUBENT A0459010 20030124 0000A045901000001 BIB 4 11 A045901000002 REACTION (69-TM-169(6-C-12,FUS),,SIG) A045901000003 COMMENT - By authors. The total complete fusion cross section A045901000004 was obtained by adding complete fusion cross sections A045901000005 of all products. The cross section includes the A045901000006 unmeasured complete fusion cross section of W-177, A045901000007 which constitutes about 1.5% of the total fusion cross A045901000008 section. A045901000009 MISC-COL (MISC) Incomplete fusion cross section A045901000010 (MISC-ERR) The uncertainty of "MISC". A045901000011 STATUS (DEP,A0459002) Up to a0459009 A045901000012 (TABLE) In text of the paper A045901000013 ENDBIB 11 0 A045901000014 NOCOMMON 0 0 A045901000015 DATA 5 1 A045901000016 EN DATA ERR-T MISC MISC-ERR A045901000017 MEV MB MB MB MB A045901000018 84. 1041. 57. 141. 11. A045901000019 ENDDATA 3 0 A045901000020 ENDSUBENT 19 0 A045901099999 ENDENTRY 10 0 A045999999999