ENTRY A0441 20160214 A084A044100000001 SUBENT A0441001 20160214 A084A044100100001 BIB 14 76 A044100100002 TITLE Incomplete fusion reactions: analysis of excitation A044100100003 functions and recoil range distributions in 16-O+51-V A044100100004 AUTHOR (S.Mukherjee, A.Sharma, S.Sodaye, B.S.Tomar, A.Goswami,A044100100005 S.B.Manohar) A044100100006 REFERENCE (J,EPJ/A,12,199,2001) A044100100007 INSTITUTE (3INDVUU) School of Studies in Physics, Vikram A044100100008 University. A044100100009 (3INDTRM) Radiochemistry division A044100100010 FACILITY (VDGT,3INDTRM) BARC-TIFR Pelletron accelerator A044100100011 COMMENT Abstract. Incomplete fusion reactions were A044100100012 investigated by measuring the excitation functions of A044100100013 nine evaporation residues in 16-O + 51-V reaction in A044100100014 the beam energy 4-6 MeV/amu, using the well-known A044100100015 recoil catcher technique and gamma-ray spectrometry. A044100100016 The experimental data were compared with that obtained A044100100017 from MONTE CARLO simulation calculations using the A044100100018 PACE2 code. The results indicate the presence of A044100100019 incomplete fusion process in the production of two A044100100020 alpha emission products. This was further confirmed byA044100100021 the measurement of recoil range distribution of these A044100100022 isotopes at 96 MeV beam energy. Calculations of the A044100100023 average angular momentum associated with these productsA044100100024 revealed the peripheral nature of these incomplete A044100100025 fusion reactions. A044100100026 Special remark by authors. In case of cobalt products,A044100100027 the experimental data are much higher than the A044100100028 calculated data indicating the contribution from A044100100029 incomplete fusion reactions. These incomplete fusion A044100100030 reactions can be of the 51-V(16-O,8-Be)59-Co* type. A044100100031 The excited 59-Co* nucleus may subsequently de-excite A044100100032 by neutron emission to give 58-56 Co. In the case of A044100100033 the evaporation residues 61-Co, there may be a breakup A044100100034 of 16-O into 12-C and 4-He and subsequent incomplete A044100100035 fusion of 12-C in the reaction 51-V(16-O,A)63-Cu; the A044100100036 evaporation of two protons leads to the formation of A044100100037 the residues. It was found that the incomplete fusion A044100100038 contributions with respect to the complete fusion A044100100039 cross-sections increase from 3% at 60 MeV to about 20% A044100100040 above 90 MeV. A044100100041 REL-REF (R,,L.C.Northcliffe+,J,ND/A,7,233,1970) To calculate A044100100042 the beam energy degradation in each target foil A044100100043 METHOD (EXTB) The target samples were irradiated with the A044100100044 collimated 16-O beam of diameter 1-2 mm. A044100100045 (STTA) A044100100046 (ACTIV) Several irradiations were carried out for each A044100100047 such stack of target and degraders to encompass the A044100100048 16-O beam energy between 58 and 94 MeV. A044100100049 (GSPEC) After the irradiation, the target and the A044100100050 catcher foil were counted in the live time mode. A044100100051 The recording time period were chosen in such a way so A044100100052 as to get the good counting statistics. The duration A044100100053 of counting was initially kept in the order of seconds A044100100054 and subsequently increased to longer periods for A044100100055 counting long-lived products. A044100100056 SAMPLE Stacks consisting of two self-supporting targets A044100100057 of vanadium, each of thickness 2.1 mg/cm**2 and purity A044100100058 99.99%, approximately, separated by aluminum foils, A044100100059 2 mg/cm**2, approximately. A044100100060 DETECTOR (HPGE) A044100100061 STATUS (CURVE) By CAJAD: figs 1-4 from EPJ/A,12,199,2001 A044100100062 ADD-RES (RANGE) A044100100063 ERR-ANALYS (ERR-T) The uncertainties are shown on figures. The A044100100064 errors on the cross section arise mostly from: A044100100065 (ERR-S,1.,4.) Uncertainty in counting statistics (1-4%)A044100100066 (ERR-1,5.,8.) Uncertainty in target thickness (5-8%), A044100100067 (ERR-2) Uncertainty in detector efficiency (4%), A044100100068 (ERR-3,,5.) Uncertainty in beam fluence (<5%) and A044100100069 (ERR-4,5.,10.) Uncertainty in gamma-ray intensity A044100100070 values (5-10%) A044100100071 (EN-ERR) The uncertainty is shown on figure without A044100100072 any details A044100100073 HISTORY (20020916C) A044100100074 (20030113U) Last checking has been done. A044100100075 (20160214A) SD: DECAY-DATA corrected in Subent 010. A044100100076 BIB, ERR-ANALYS update. ANALYSIS (AREA) deleted (not A044100100077 relevant). A044100100078 ENDBIB 76 0 A044100100079 COMMON 1 3 A044100100080 ERR-2 A044100100081 PER-CENT A044100100082 4. A044100100083 ENDCOMMON 3 0 A044100100084 ENDSUBENT 83 0 A044100199999 SUBENT A0441002 20030113 0000A044100200001 BIB 2 2 A044100200002 REACTION (23-V-51(8-O-16,2N)31-GA-65,,SIG) A044100200003 DECAY-DATA (31-GA-65,15.2MIN,DG,115.,0.55) A044100200004 ENDBIB 2 0 A044100200005 COMMON 1 3 A044100200006 EN-ERR A044100200007 MEV A044100200008 0.19 A044100200009 ENDCOMMON 3 0 A044100200010 DATA 3 3 A044100200011 EN DATA ERR-T A044100200012 MEV MB PER-CENT A044100200013 58.31 7.7 14. A044100200014 69.6 1.18 12. A044100200015 72.16 0.46 15. A044100200016 ENDDATA 5 0 A044100200017 ENDSUBENT 16 0 A044100299999 SUBENT A0441003 20030113 0000A044100300001 BIB 2 2 A044100300002 REACTION (23-V-51(8-O-16,X)30-ZN-63,CUM,SIG) A044100300003 DECAY-DATA (30-ZN-63,38.7MIN,DG,670.,0.084) A044100300004 ENDBIB 2 0 A044100300005 COMMON 1 3 A044100300006 EN-ERR A044100300007 MEV A044100300008 0.19 A044100300009 ENDCOMMON 3 0 A044100300010 DATA 3 6 A044100300011 EN DATA ERR-T A044100300012 MEV MB PER-CENT A044100300013 58.29 28. 14. A044100300014 68.87 78. 14. A044100300015 72.08 94. 13. A044100300016 82.14 109. 14. A044100300017 87.38 37. 14. A044100300018 93.29 32. 16. A044100300019 ENDDATA 8 0 A044100300020 ENDSUBENT 19 0 A044100399999 SUBENT A0441004 20030113 0000A044100400001 BIB 2 2 A044100400002 REACTION (23-V-51(8-O-16,X)30-ZN-62,CUM,SIG) A044100400003 DECAY-DATA (30-ZN-62,9.186HR,DG,597.,0.28) A044100400004 ENDBIB 2 0 A044100400005 COMMON 1 3 A044100400006 EN-ERR A044100400007 MEV A044100400008 0.19 A044100400009 ENDCOMMON 3 0 A044100400010 DATA 3 3 A044100400011 EN DATA ERR-T A044100400012 MEV MB PER-CENT A044100400013 82.06 3.2 13. A044100400014 87.26 15.5 15. A044100400015 93.43 12.9 12. A044100400016 ENDDATA 5 0 A044100400017 ENDSUBENT 16 0 A044100499999 SUBENT A0441005 20030113 0000A044100500001 BIB 2 2 A044100500002 REACTION (23-V-51(8-O-16,X)29-CU-61,CUM,SIG) A044100500003 DECAY-DATA (29-CU-61,3.3HR,DG,656.,0.10) A044100500004 ENDBIB 2 0 A044100500005 COMMON 1 3 A044100500006 EN-ERR A044100500007 MEV A044100500008 0.2 A044100500009 ENDCOMMON 3 0 A044100500010 DATA 3 6 A044100500011 EN DATA ERR-T A044100500012 MEV MB PER-CENT A044100500013 58.74 77. 16. A044100500014 69.96 68. 15. A044100500015 72.39 88. 16. A044100500016 82.59 98. 15. A044100500017 87.54 36. 14. A044100500018 93.86 40. 15. A044100500019 ENDDATA 8 0 A044100500020 ENDSUBENT 19 0 A044100599999 SUBENT A0441006 20030113 0000A044100600001 BIB 2 2 A044100600002 REACTION (23-V-51(8-O-16,X)29-CU-60,CUM,SIG) A044100600003 DECAY-DATA (29-CU-60,23.7MIN,DG,826.,0.88) A044100600004 ENDBIB 2 0 A044100600005 COMMON 1 3 A044100600006 EN-ERR A044100600007 MEV A044100600008 0.2 A044100600009 ENDCOMMON 3 0 A044100600010 DATA 3 6 A044100600011 EN DATA ERR-T A044100600012 MEV MB PER-CENT A044100600013 58.65 0.93 15. A044100600014 69.73 10.6 16. A044100600015 72.45 12.1 15. A044100600016 82.47 16.5 14. A044100600017 87.51 10.9 16. A044100600018 93.81 13.7 14. A044100600019 ENDDATA 8 0 A044100600020 ENDSUBENT 19 0 A044100699999 SUBENT A0441007 20030113 0000A044100700001 BIB 2 2 A044100700002 REACTION (23-V-51(8-O-16,X)27-CO-61,CUM,SIG) A044100700003 DECAY-DATA (27-CO-61,1.65HR,DG,908.6,0.03) A044100700004 ENDBIB 2 0 A044100700005 COMMON 1 3 A044100700006 EN-ERR A044100700007 MEV A044100700008 0.24 A044100700009 ENDCOMMON 3 0 A044100700010 DATA 3 6 A044100700011 EN DATA ERR-T A044100700012 MEV MB PER-CENT A044100700013 58.44 13.5 14. A044100700014 69.41 17.1 15. A044100700015 71.95 20.6 12. A044100700016 82.25 23. 13. A044100700017 86.98 12.3 14. A044100700018 93.4 14.1 14. A044100700019 ENDDATA 8 0 A044100700020 ENDSUBENT 19 0 A044100799999 SUBENT A0441008 20030113 0000A044100800001 BIB 2 2 A044100800002 REACTION (23-V-51(8-O-16,X)27-CO-58-G,M+,SIG) A044100800003 DECAY-DATA (27-CO-58-G,70.2D,DG,811.,0.994) A044100800004 ENDBIB 2 0 A044100800005 COMMON 1 3 A044100800006 EN-ERR A044100800007 MEV A044100800008 0.24 A044100800009 ENDCOMMON 3 0 A044100800010 DATA 3 6 A044100800011 EN DATA ERR-T A044100800012 MEV MB PER-CENT A044100800013 58.26 41. 15. A044100800014 69.06 79. 15. A044100800015 72.1 93. 14. A044100800016 81.9 89. 15. A044100800017 86.96 77. 14. A044100800018 93.21 89. 15. A044100800019 ENDDATA 8 0 A044100800020 ENDSUBENT 19 0 A044100899999 SUBENT A0441009 20030113 0000A044100900001 BIB 2 2 A044100900002 REACTION (23-V-51(8-O-16,X)27-CO-57,CUM,SIG) A044100900003 DECAY-DATA (27-CO-57,271.79D,DG,122.,0.855) A044100900004 ENDBIB 2 0 A044100900005 COMMON 1 3 A044100900006 EN-ERR A044100900007 MEV A044100900008 0.21 A044100900009 ENDCOMMON 3 0 A044100900010 DATA 3 6 A044100900011 EN DATA ERR-T A044100900012 MEV MB PER-CENT A044100900013 58.06 4.7 15. A044100900014 69.24 94. 14. A044100900015 71.92 57. 14. A044100900016 82.2 46. 13. A044100900017 87.11 105. 14. A044100900018 93.52 123. 14. A044100900019 ENDDATA 8 0 A044100900020 ENDSUBENT 19 0 A044100999999 SUBENT A0441010 20160214 A084A044101000001 BIB 3 4 A044101000002 REACTION (23-V-51(8-O-16,X)27-CO-56,CUM,SIG) A044101000003 DECAY-DATA (27-CO-56,77.2D,DG,1238.,0.66) A044101000004 HISTORY (20160214A) SD: DECAY-DATA corrected according to the A044101000005 Tbl. 1 from EPJ/A,12,199,2001 A044101000006 ENDBIB 4 0 A044101000007 COMMON 1 3 A044101000008 EN-ERR A044101000009 MEV A044101000010 0.21 A044101000011 ENDCOMMON 3 0 A044101000012 DATA 3 3 A044101000013 EN DATA ERR-T A044101000014 MEV MB PER-CENT A044101000015 82.2 2.4 13. A044101000016 87.41 12.5 14. A044101000017 93.37 23. 17. A044101000018 ENDDATA 5 0 A044101000019 ENDSUBENT 18 0 A044101099999 ENDENTRY 10 0 A044199999999