ENTRY A0520 20030708 0000A052000000001 SUBENT A0520001 20030708 0000A052000100001 BIB 11 78 A052000100002 TITLE Near-barrier fusion of weakly bound 6-Li and 7-Li A052000100003 nuclei with 59Co A052000100004 AUTHOR (C.Beck, F.A.Souza, N.Rowley, S.J.Sanders, N.Aissaoui, A052000100005 E.E.Alonso, P.Bednarczyk, N.Carlin, S.Courtin, A052000100006 A.Diaz-Torres, A.Dummer, F.Haas, A.Hachem, K.Hagino, A052000100007 F.Hoellinger, R.V.F.Janssens, N.Kintz, R.Liguori Neto, A052000100008 E.Martin, M.M.Moura, M.G.Munhoz, P.Papka, M.Rousseau, A052000100009 A.Sanchez I Zafra, O.Stezowski, A.A.Suaide, E.M.Szanto,A052000100010 Szanto De Toledo, S.Szilner, J.Takahashi) A052000100011 INSTITUTE (2FR STR) Institut de recherches subatomiques et A052000100012 universite Louis Pasteur A052000100013 (3BZLUSP) Departamento de Fisica Nuclear A052000100014 (1USAKAN) A052000100015 (2GERJLU) Institut fuer Theoretische Physik A052000100016 (2FR FR) Universite de Nice-Sophia-Antipolis A052000100017 (2FR PAR) Institut de Physique Nucleaire A052000100018 (1USAANL) A052000100019 REFERENCE (J,PR/C,67,054602,20030502) A052000100020 SAMPLE The targets consisted of thin foils of 59-Co of areal A052000100021 density ~600 mg/cm2, leading to an average energy loss A052000100022 ~500 KeV, backed by 48-mg/cm**2-thick Pb (strasbourg) A052000100023 or very thick Ta (sao paulo), with thin (~'65 mg/cm**2 A052000100024 thick) Al buffer layers between the Co foils and the A052000100025 backing material. This Al layer is necessary to A052000100026 prevent any diffusion of the Co material into the Pb A052000100027 backing. The backings were used to avoid Doppler A052000100028 shifts of the gamma lines. A052000100029 DETECTOR (HPGE) For the strasbourg measurements, the g-ray eventA052000100030 were detected with part of the Garel spectrometer arrayA052000100031 configured with 14 compton-suppressed, high-efficiency A052000100032 Eurogam-type Hp-Ge detectors together with one LEPS A052000100033 low-energy photon spectrometer detector. A052000100034 FACILITY (VDGT,3BZLUSP) A052000100035 (VDGT,2FR STR) A052000100036 METHOD (GSPEC) This technique has been shown to work well in A052000100037 mass regions with well-established level schemes and A052000100038 with a small number of long-lived isomeric states. A052000100039 "Comment by authors" A052000100040 (EXTB) The 6-Li and 7-Li beams, with energies between A052000100041 11 and 26 MeV and intensities of 5-10 partcle A052000100042 nanoamperes. A052000100043 (BCINT) The beam was not stopped in the Pb target A052000100044 backing. Consequently, the beam current, measured on A052000100045 a Faraday cup after the target, was integrated in orderA052000100046 to obtain the charge accumulated at each energy. For A052000100047 the sao paulo measurements, the beam was stopped in theA052000100048 target backing and the beam current was integrated on A052000100049 the isolated and biased target holder. A052000100050 COMMENT -By authors. Most of the fusion yield is concentrated A052000100051 in just a few dominant evaporation residue channels. A052000100052 However, there are some ambiguities in the assignments A052000100053 to these channels. Transitions leading to 63Zn and A052000100054 63Cu [corresponding to the (2N) and (pn) channels for A052000100055 65Zn and to (3N) and (P2N) for 66Zn] are identified by A052000100056 the same two gamma-rays (669 KeV and 962 KeV) in 63Cu, A052000100057 populated either directly or following 63Zn beta-decay.A052000100058 Thus, in both reactions, these yields are presented by A052000100059 their sum. The statistical model predicts comparable A052000100060 63Zn and 63Cu yields for 6Li+59Co, but predicts an A052000100061 appreciable yield only for 63Cu in the 7Li+59Co A052000100062 reaction. A similar situation occurs for 64Cu and 60CoA052000100063 [corresponding to the (P) and (alpha+P) channels for A052000100064 the 6Li induced reactions and to (pn) and (alpha+pn) A052000100065 for 7Li] since a 278-KeV gamma ray is present in both A052000100066 nuclei. A052000100067 HISTORY (20030616C) A052000100068 (20030701R) Data tables for fusion cross section are A052000100069 received from C.Beck A052000100070 (20030708U) Last checking has been done. A052000100071 ERR-ANALYS (ERR-1) The uncertainty in the total fusion cross A052000100072 section A052000100073 (ERR-S) Statistical uncertainty A052000100074 the uncertainties in the total fusion cross sections A052000100075 come from statistical errors in the determination of A052000100076 the gamma-ray yields, background subtraction, absolute A052000100077 efficiency of the detectors, and systematic errors A052000100078 resulting from measurements of the target thickness andA052000100079 the integrated beam current. A052000100080 ENDBIB 78 0 A052000100081 COMMON 2 3 A052000100082 ERR-1 ERR-S A052000100083 PER-CENT PER-CENT A052000100084 20. 5. A052000100085 ENDCOMMON 3 0 A052000100086 ENDSUBENT 85 0 A052000199999 SUBENT A0520002 20030708 0000A052000200001 BIB 3 4 A052000200002 REACTION (27-CO-59(3-LI-7,2N)30-ZN-64,,SIG) A052000200003 STATUS (CURVE) By CAJAD A052000200004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000200005 (DATA-ERR) Data point reader uncertainty A052000200006 ENDBIB 4 0 A052000200007 COMMON 2 3 A052000200008 EN-ERR DATA-ERR A052000200009 MEV PER-CENT A052000200010 7.E-02 4. A052000200011 ENDCOMMON 3 0 A052000200012 DATA 2 15 A052000200013 EN-CM DATA A052000200014 MEV MB A052000200015 10.67 11.9 A052000200016 11.34 26.5 A052000200017 12.26 30.9 A052000200018 13.18 85. A052000200019 13.95 85. A052000200020 14.92 129. A052000200021 15.74 137. A052000200022 16.66 138. A052000200023 17.58 126. A052000200024 18.55 138. A052000200025 19.42 109. A052000200026 20.3 72. A052000200027 21.17 68.5 A052000200028 22.29 70.7 A052000200029 22.96 82. A052000200030 ENDDATA 17 0 A052000200031 ENDSUBENT 30 0 A052000299999 SUBENT A0520003 20030708 0000A052000300001 BIB 3 4 A052000300002 REACTION (27-CO-59(3-LI-7,N+A)28-NI-61,,SIG) A052000300003 STATUS (CURVE) By CAJAD A052000300004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000300005 (DATA-ERR) Data point reader uncertainty A052000300006 ENDBIB 4 0 A052000300007 COMMON 2 3 A052000300008 EN-ERR DATA-ERR A052000300009 MEV PER-CENT A052000300010 7.E-02 4. A052000300011 ENDCOMMON 3 0 A052000300012 DATA 2 14 A052000300013 EN-CM DATA A052000300014 MEV MB A052000300015 10.68 11.65 A052000300016 11.35 22.4 A052000300017 13.19 50. A052000300018 14.11 74. A052000300019 14.93 86. A052000300020 15.8 100. A052000300021 16.58 103. A052000300022 17.55 100.5 A052000300023 18.51 120.5 A052000300024 19.48 110.5 A052000300025 20.26 82.5 A052000300026 21.23 85. A052000300027 22.15 108. A052000300028 23.02 125.5 A052000300029 ENDDATA 16 0 A052000300030 ENDSUBENT 29 0 A052000399999 SUBENT A0520004 20030708 0000A052000400001 BIB 3 5 A052000400002 REACTION ((27-CO-59(3-LI-7,N+P)29-CU-64,,SIG)+ A052000400003 (27-CO-59(3-LI-7,N+P+A)27-CO-60,,SIG)) A052000400004 STATUS (CURVE) By CAJAD A052000400005 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000400006 (DATA-ERR) Data point reader uncertainty A052000400007 ENDBIB 5 0 A052000400008 COMMON 2 3 A052000400009 EN-ERR DATA-ERR A052000400010 MEV PER-CENT A052000400011 7.E-02 4. A052000400012 ENDCOMMON 3 0 A052000400013 DATA 2 15 A052000400014 EN-CM DATA A052000400015 MEV MB A052000400016 10.73 7.3 A052000400017 11.36 16.9 A052000400018 12.23 19. A052000400019 13.19 50.7 A052000400020 14.02 55.6 A052000400021 14.98 84. A052000400022 15.85 98. A052000400023 16.73 108. A052000400024 17.5 102. A052000400025 18.61 118. A052000400026 19.44 108. A052000400027 20.31 78. A052000400028 21.28 74. A052000400029 22.15 86. A052000400030 23.12 106. A052000400031 ENDDATA 17 0 A052000400032 ENDSUBENT 31 0 A052000499999 SUBENT A0520005 20030708 0000A052000500001 BIB 3 5 A052000500002 REACTION ((27-CO-59(3-LI-7,2N+P)29-CU-63,,SIG)+ A052000500003 (27-CO-59(3-LI-7,3N)30-ZN-63,,SIG)) A052000500004 STATUS (CURVE) By CAJAD A052000500005 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000500006 (DATA-ERR) Data point reader uncertainty A052000500007 ENDBIB 5 0 A052000500008 COMMON 2 3 A052000500009 EN-ERR DATA-ERR A052000500010 MEV PER-CENT A052000500011 7.E-02 4. A052000500012 ENDCOMMON 3 0 A052000500013 DATA 2 14 A052000500014 EN-CM DATA A052000500015 MEV MB A052000500016 10.71 3.37 A052000500017 11.38 7.3 A052000500018 13.21 30.4 A052000500019 14.18 63.9 A052000500020 14.9 91. A052000500021 15.82 127. A052000500022 16.64 176. A052000500023 17.61 193. A052000500024 18.58 261. A052000500025 19.4 269. A052000500026 20.32 233. A052000500027 21.14 279. A052000500028 22.16 344. A052000500029 23.03 425. A052000500030 ENDDATA 16 0 A052000500031 ENDSUBENT 30 0 A052000599999 SUBENT A0520006 20030708 0000A052000600001 BIB 3 4 A052000600002 REACTION (27-CO-59(3-LI-7,2N+A)28-NI-60,,SIG) A052000600003 STATUS (CURVE) By CAJAD A052000600004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000600005 (DATA-ERR) Data point reader uncertainty A052000600006 ENDBIB 4 0 A052000600007 COMMON 2 3 A052000600008 EN-ERR DATA-ERR A052000600009 MEV PER-CENT A052000600010 7.E-02 4. A052000600011 ENDCOMMON 3 0 A052000600012 DATA 2 15 A052000600013 EN-CM DATA A052000600014 MEV MB A052000600015 10.71 2.29 A052000600016 11.38 4.28 A052000600017 12.15 6.88 A052000600018 13.12 8.5 A052000600019 14.09 11.8 A052000600020 15.01 15. A052000600021 15.83 18.5 A052000600022 16.75 23.5 A052000600023 17.67 25. A052000600024 18.64 34.8 A052000600025 19.41 32.8 A052000600026 20.43 26. A052000600027 21.21 30.2 A052000600028 22.17 39.6 A052000600029 23.09 51.8 A052000600030 ENDDATA 17 0 A052000600031 ENDSUBENT 30 0 A052000699999 SUBENT A0520007 20030708 0000A052000700001 BIB 4 6 A052000700002 REACTION (27-CO-59(3-LI-7,3N+P)29-CU-62,,SIG) A052000700003 STATUS (CURVE) By CAJAD A052000700004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000700005 (DATA-ERR) Data point reader uncertainty A052000700006 COMMENT -By authors. The cross section includes a little A052000700007 deposit from 63-, 62-, 59-Ni production. A052000700008 ENDBIB 6 0 A052000700009 COMMON 2 3 A052000700010 EN-ERR DATA-ERR A052000700011 MEV PER-CENT A052000700012 7.E-02 4. A052000700013 ENDCOMMON 3 0 A052000700014 DATA 2 15 A052000700015 EN-CM DATA A052000700016 MEV MB A052000700017 10.71 1.75 A052000700018 11.43 3. A052000700019 12.16 3.19 A052000700020 13.17 8.2 A052000700021 14.14 11.5 A052000700022 15.06 15. A052000700023 15.93 19.1 A052000700024 16.75 22.2 A052000700025 17.62 25. A052000700026 18.54 34.8 A052000700027 19.41 31. A052000700028 20.33 26. A052000700029 21.25 29.3 A052000700030 22.12 38.4 A052000700031 23.09 48.8 A052000700032 ENDDATA 17 0 A052000700033 ENDSUBENT 32 0 A052000799999 SUBENT A0520008 20030708 0000A052000800001 BIB 5 7 A052000800002 REACTION (27-CO-59(3-LI-7,FUS),,SIG) A052000800003 MISC-COL (MISC) Energy in C.-M. System A052000800004 STATUS (TABLE) From C.Beck A052000800005 COMMENT -By authors. The average fusion excitation functions, A052000800006 obtained by fitting the data with the single-barrier A052000800007 penetration model of Wong A052000800008 REL-REF (R,,C.Y.WONG,J,PRL,31,766,1973) A052000800009 ENDBIB 7 0 A052000800010 NOCOMMON 0 0 A052000800011 DATA 3 15 A052000800012 EN DATA MISC A052000800013 MEV MB MEV A052000800014 12.3 37.99 10.8 A052000800015 13. 80.01 11.43 A052000800016 14. 89.4 12.33 A052000800017 15. 245.4 13.24 A052000800018 16. 311.6 14.14 A052000800019 17. 458.6 15.03 A052000800020 18. 546.7 15.93 A052000800021 19. 620.9 16.83 A052000800022 20. 647.3 17.73 A052000800023 21. 797. 18.63 A052000800024 22. 758.6 19.53 A052000800025 23. 608.8 20.43 A052000800026 24. 691.1 21.32 A052000800027 25. 910.8 22.22 A052000800028 26. 1014. 23.12 A052000800029 ENDDATA 17 0 A052000800030 ENDSUBENT 29 0 A052000899999 SUBENT A0520009 20030708 0000A052000900001 BIB 3 4 A052000900002 REACTION (27-CO-59(3-LI-6,N+A)28-NI-60,,SIG) A052000900003 STATUS (CURVE) By CAJAD A052000900004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052000900005 (DATA-ERR) Data point reader uncertainty A052000900006 ENDBIB 4 0 A052000900007 COMMON 2 3 A052000900008 EN-ERR DATA-ERR A052000900009 MEV PER-CENT A052000900010 7.E-02 4. A052000900011 ENDCOMMON 3 0 A052000900012 DATA 2 12 A052000900013 EN-CM DATA A052000900014 MEV MB A052000900015 10.52 36.9 A052000900016 11.44 66.5 A052000900017 12.31 95. A052000900018 13.33 128. A052000900019 14.2 153. A052000900020 15.12 132. A052000900021 16.09 173. A052000900022 17.01 206. A052000900023 17.97 247. A052000900024 21.51 203. A052000900025 22.53 187. A052000900026 23.45 244. A052000900027 ENDDATA 14 0 A052000900028 ENDSUBENT 27 0 A052000999999 SUBENT A0520010 20030708 0000A052001000001 BIB 3 5 A052001000002 REACTION ((27-CO-59(3-LI-6,N+P)29-CU-63,,SIG)+ A052001000003 (27-CO-59(3-LI-6,2N)30-ZN-63,,SIG)) A052001000004 STATUS (CURVE) By CAJAD A052001000005 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052001000006 (DATA-ERR) Data point reader uncertainty A052001000007 ENDBIB 5 0 A052001000008 COMMON 2 3 A052001000009 EN-ERR DATA-ERR A052001000010 MEV PER-CENT A052001000011 7.E-02 4. A052001000012 ENDCOMMON 3 0 A052001000013 DATA 2 12 A052001000014 EN-CM DATA A052001000015 MEV MB A052001000016 10.53 8.7 A052001000017 11.54 23.8 A052001000018 12.41 49.7 A052001000019 13.28 80. A052001000020 14.25 114. A052001000021 15.22 114. A052001000022 16.09 149. A052001000023 17.05 173. A052001000024 17.93 195. A052001000025 21.56 161. A052001000026 22.48 176. A052001000027 23.45 166. A052001000028 ENDDATA 14 0 A052001000029 ENDSUBENT 28 0 A052001099999 SUBENT A0520011 20030708 0000A052001100001 BIB 3 4 A052001100002 REACTION (27-CO-59(3-LI-6,2N+P)29-CU-62,,SIG) A052001100003 STATUS (CURVE) By CAJAD A052001100004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052001100005 (DATA-ERR) Data point reader uncertainty A052001100006 ENDBIB 4 0 A052001100007 COMMON 2 3 A052001100008 EN-ERR DATA-ERR A052001100009 MEV PER-CENT A052001100010 7.E-02 4. A052001100011 ENDCOMMON 3 0 A052001100012 DATA 2 12 A052001100013 EN-CM DATA A052001100014 MEV MB A052001100015 10.59 1.78 A052001100016 11.46 3.505 A052001100017 12.43 8. A052001100018 13.3 14.85 A052001100019 14.17 25.3 A052001100020 15.09 32.1 A052001100021 16. 61.5 A052001100022 16.87 78. A052001100023 18.03 111. A052001100024 21.52 279. A052001100025 22.44 264. A052001100026 23.41 425. A052001100027 ENDDATA 14 0 A052001100028 ENDSUBENT 27 0 A052001199999 SUBENT A0520012 20030708 0000A052001200001 BIB 4 6 A052001200002 REACTION (27-CO-59(3-LI-6,3N)30-ZN-62,,SIG) A052001200003 STATUS (CURVE) By CAJAD A052001200004 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052001200005 (DATA-ERR) Data point reader uncertainty A052001200006 COMMENT -By authors. The cross section includes a little A052001200007 deposit from 63-, 62-Ni production A052001200008 ENDBIB 6 0 A052001200009 COMMON 2 3 A052001200010 EN-ERR DATA-ERR A052001200011 MEV PER-CENT A052001200012 7.E-02 4. A052001200013 ENDCOMMON 3 0 A052001200014 DATA 2 12 A052001200015 EN-CM DATA A052001200016 MEV MB A052001200017 10.66 2.39 A052001200018 11.43 4.57 A052001200019 12.39 9. A052001200020 13.26 14.4 A052001200021 14.13 21.2 A052001200022 15.2 25.4 A052001200023 16.02 38.4 A052001200024 16.99 43.3 A052001200025 17.91 58.2 A052001200026 21.49 79. A052001200027 22.46 79. A052001200028 23.38 100. A052001200029 ENDDATA 14 0 A052001200030 ENDSUBENT 29 0 A052001299999 SUBENT A0520013 20030708 0000A052001300001 BIB 3 5 A052001300002 REACTION ((27-CO-59(3-LI-6,P)29-CU-64,,SIG)+ A052001300003 (27-CO-59(3-LI-6,P+A)27-CO-60,,SIG)) A052001300004 STATUS (CURVE) By CAJAD A052001300005 ERR-ANALYS (EN-ERR) Data point reader uncertainty A052001300006 (DATA-ERR) Data point reader uncertainty A052001300007 ENDBIB 5 0 A052001300008 COMMON 2 3 A052001300009 EN-ERR DATA-ERR A052001300010 MEV PER-CENT A052001300011 7.E-02 4. A052001300012 ENDCOMMON 3 0 A052001300013 DATA 2 12 A052001300014 EN-CM DATA A052001300015 MEV MB A052001300016 10.5 8.8 A052001300017 11.47 14.55 A052001300018 12.39 18.45 A052001300019 13.31 26.3 A052001300020 14.23 31.45 A052001300021 15.1 25.65 A052001300022 16.02 32.55 A052001300023 16.93 60.5 A052001300024 17.9 72.5 A052001300025 21.54 48.5 A052001300026 22.46 47. A052001300027 23.28 61.5 A052001300028 ENDDATA 14 0 A052001300029 ENDSUBENT 28 0 A052001399999 SUBENT A0520014 20030708 0000A052001400001 BIB 5 7 A052001400002 REACTION (27-CO-59(3-LI-6,FUS),,SIG) A052001400003 MISC-COL (MISC) Energy in C.-M. System A052001400004 STATUS (TABLE) From C.Beck A052001400005 COMMENT -By authors. The average fusion excitation functions, A052001400006 obtained by fitting the data with the single-barrier A052001400007 penetration model of Wong A052001400008 REL-REF (R,,C.Y.WONG,J,PRL,31,766,1973) A052001400009 ENDBIB 7 0 A052001400010 NOCOMMON 0 0 A052001400011 DATA 3 12 A052001400012 EN DATA MISC A052001400013 MEV MB MEV A052001400014 12. 57.3 10.71 A052001400015 13. 114.3 11.62 A052001400016 14. 178.2 12.54 A052001400017 15. 261.2 13.45 A052001400018 16. 339.3 14.37 A052001400019 17. 333.3 15.28 A052001400020 18. 467. 16.19 A052001400021 19. 565.2 17.13 A052001400022 20. 681.3 18.04 A052001400023 24. 769. 21.66 A052001400024 25. 758.1 22.57 A052001400025 26. 988.2 23.48 A052001400026 ENDDATA 14 0 A052001400027 ENDSUBENT 26 0 A052001499999 ENDENTRY 14 0 A052099999999