ENTRY C1738 20170403 C166C173800000001 SUBENT C1738001 20170403 C166C173800100001 BIB 12 57 C173800100002 TITLE Influence of projectile neutron number in the C173800100003 208Pb(48Ti,n)255Rf and 208Pb(50Ti,n)257Rf reactions C173800100004 AUTHOR (I.Dragojevic,K.E.Gregorich,Ch.E.Dullmann,M.A.Garcia, C173800100005 J.M.Gates,S.L.Nelson,L.Stavsetra,R.Sudowe,H.Nitsche) C173800100006 REFERENCE (J,PR/C,78,024605,2008) C173800100007 #doi:10.1103/PhysRevC.78.024605 C173800100008 INSTITUTE (1USAUCX,1USABRK,2GERGSI) C173800100009 FACILITY (CYCLO,1USABRK) Lawrence Berkeley National Laboratory C173800100010 88-Inch Cyclotron with the Gas-filled Separator (BGS). C173800100011 SAMPLE (82-PB-208,ENR=0.984) C173800100012 (82-PB-207,ENR=0.011) C173800100013 (82-PB-206,ENR=0.005) Two separate experiments, one C173800100014 with thick (470 microg/cm2) and one with thin (104 C173800100015 microg/cm2) 208Pb targets have been conducted. C173800100016 PART-DET (A) C173800100017 DETECTOR (SISD,MWPC) The detection setup for the experiment C173800100018 with the thin targets was slightly different from the C173800100019 detection setup employed for the experiment with the C173800100020 thick targets. In the experiment with the thin 208Pb C173800100021 targets, a focal plane detector was used to detect C173800100022 the recoils. The focal plane detector consisted of C173800100023 three 300-microm thick silicon cards (each 6x6 cm2), C173800100024 each consisting of 16 vertical strips, giving a total C173800100025 of 48 silicon strips which provide horizontal C173800100026 resolution. The experiment involving the thick C173800100027 targets had a similar experimental setup except that C173800100028 a double sided silicon strip detector (DSSD) was used C173800100029 instead of the focal plane detector, and there were C173800100030 no upstream or punch-through detectors. The DSSD is 1 C173800100031 mm thick and has 16 horizontal and 16 vertical strips C173800100032 (5x5 cm2), allowing for a very good position (the C173800100033 pixel size is 3x3 mm2) and energy resolution (35 C173800100034 keV). A multiwire proportional counter (MWPC) was C173800100035 placed upstream from the focal plane detector. C173800100036 METHOD (ASPEC,COINC,TOF) Cross sections were deduced from C173800100037 the count of alpha-decay chains. The presence or C173800100038 absence of signals from the MWPC in coincidence with C173800100039 signals from the focal plane detector allowed for C173800100040 discrimination between implantation events and C173800100041 radioactive decays in the focal plane detector. C173800100042 Product identification was based on a complex C173800100043 trigger. For example, 256Rf atoms were identified by C173800100044 observation of an evaporation residue [8.0 < E (MeV) C173800100045 < 20.0, TOF signal between the DSSD and the MWPC] C173800100046 followed by a spontaneous fission [E (MeV)> 90MeV, no C173800100047 TOF signal between the DSSD and the MWPC] within 150 C173800100048 ms in the same DSSD pixel. To obtain a statistically C173800100049 significant result within a relatively short C173800100050 irradiation time, thick lead targets were used to C173800100051 measure the high energy side of the excitation C173800100052 function. C173800100053 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. The C173800100054 systematic error in the absolute beam energies from C173800100055 the cyclotron is 1%. C173800100056 COMMENT Cross section upper limits are given at 84% confidence C173800100057 level. C173800100058 HISTORY (20170403C) BP C173800100059 ENDBIB 57 0 C173800100060 NOCOMMON 0 0 C173800100061 ENDSUBENT 60 0 C173800199999 SUBENT C1738002 20170403 C166C173800200001 BIB 4 5 C173800200002 REACTION (82-PB-208(22-TI-48,N)104-RF-255,,SIG) C173800200003 DECAY-DATA (104-RF-255,1.64SEC,A) C173800200004 FLAG (1.) Targets were 470 microg/cm2 on 40 microg/cm2 C. C173800200005 (2.) Targets were 104 microg/cm2 on 38 microg/cm2 C. C173800200006 STATUS (TABLE) Table I, page 024605-4. C173800200007 ENDBIB 5 0 C173800200008 NOCOMMON 0 0 C173800200009 DATA 7 10 C173800200010 EN EN-ERR DATA +DATA-ERR -DATA-ERR DATA-MAX C173800200011 FLAG C173800200012 MEV MEV NB NB NB NB C173800200013 NO-DIM C173800200014 218.8 2.188 0.036C173800200015 1. C173800200016 220.7 2.207 0.11 0.06 0.04 C173800200017 2. C173800200018 222.2 2.222 0.20 0.11 0.07 C173800200019 2. C173800200020 223.3 2.233 0.41 0.16 0.12 C173800200021 2. C173800200022 223.8 2.239 0.39 0.17 0.12 C173800200023 1. C173800200024 225.8 2.258 0.13 0.08 0.05 C173800200025 2. C173800200026 228.4 2.284 0.23 0.18 0.11 C173800200027 1. C173800200028 228.8 2.288 0.13 0.08 0.05 C173800200029 2. C173800200030 233.8 2.338 0.028 0.064 0.023 C173800200031 1. C173800200032 238.8 2.388 0.049 0.065 0.032 C173800200033 1. C173800200034 ENDDATA 24 0 C173800200035 ENDSUBENT 34 0 C173800299999 SUBENT C1738003 20170403 C166C173800300001 BIB 4 5 C173800300002 REACTION (82-PB-208(22-TI-48,2N)104-RF-254,,SIG) C173800300003 DECAY-DATA (104-RF-254,29.MICROSEC) C173800300004 FLAG (1.) Targets were 470 microg/cm2 on 40 microg/cm2 C. C173800300005 (2.) Targets were 104 microg/cm2 on 38 microg/cm2 C. C173800300006 STATUS (TABLE) Table I, page 024605-4. C173800300007 ENDBIB 5 0 C173800300008 NOCOMMON 0 0 C173800300009 DATA 7 10 C173800300010 EN EN-ERR DATA +DATA-ERR -DATA-ERR DATA-MAX C173800300011 FLAG C173800300012 MEV MEV NB NB NB NB C173800300013 NO-DIM C173800300014 218.8 2.188 0.049C173800300015 1. C173800300016 220.7 2.207 0.038C173800300017 2. C173800300018 222.2 2.222 0.072C173800300019 2. C173800300020 223.3 2.233 0.063C173800300021 2. C173800300022 223.8 2.239 0.098C173800300023 1. C173800300024 225.8 2.258 0.034 0.079 0.028 C173800300025 2. C173800300026 228.4 2.284 0.40 0.27 0.17 C173800300027 1. C173800300028 228.8 2.288 0.17 0.1 0.07 C173800300029 2. C173800300030 233.8 2.338 0.31 0.15 0.11 C173800300031 1. C173800300032 238.8 2.388 0.14 0.11 0.06 C173800300033 1. C173800300034 ENDDATA 24 0 C173800300035 ENDSUBENT 34 0 C173800399999 SUBENT C1738004 20170403 C166C173800400001 BIB 4 5 C173800400002 REACTION (82-PB-208(22-TI-50,N)104-RF-257,,SIG) C173800400003 SAMPLE Targets were 104 microg/cm2 on 38 microg/cm2 C. C173800400004 DECAY-DATA (104-RF-257-G,7.2SEC) C173800400005 (104-RF-257-M,4.1SEC) C173800400006 STATUS (TABLE) Table I, page 024605-4. C173800400007 ENDBIB 5 0 C173800400008 NOCOMMON 0 0 C173800400009 DATA 5 8 C173800400010 EN EN-ERR DATA +DATA-ERR -DATA-ERR C173800400011 MEV MEV NB NB NB C173800400012 228.5 2.285 11.7 3.3 2.6 C173800400013 229.5 2.295 26.5 4.9 4.2 C173800400014 230.5 2.305 43.0 10.0 8.0 C173800400015 232.6 2.326 20.0 5.0 4.0 C173800400016 234.6 2.346 14.0 3.0 3.0 C173800400017 236.0 2.360 4.7 0.7 0.6 C173800400018 239.0 2.390 1.0 0.1 0.1 C173800400019 242.0 2.420 0.38 0.50 0.24 C173800400020 ENDDATA 10 0 C173800400021 ENDSUBENT 20 0 C173800499999 SUBENT C1738005 20170403 C166C173800500001 BIB 4 4 C173800500002 REACTION (82-PB-208(22-TI-50,2N)104-RF-256,,SIG) C173800500003 SAMPLE Targets were 104 microg/cm2 on 38 microg/cm2 C. C173800500004 DECAY-DATA (104-RF-256,6.70MSEC) C173800500005 STATUS (TABLE) Table I, page 024605-4. C173800500006 ENDBIB 4 0 C173800500007 NOCOMMON 0 0 C173800500008 DATA 6 8 C173800500009 EN EN-ERR DATA +DATA-ERR -DATA-ERR DATA-MAX C173800500010 MEV MEV NB NB NB NB C173800500011 228.5 2.285 0.78C173800500012 229.5 2.295 0.83C173800500013 230.5 2.305 1.07 2.5 0.9 C173800500014 232.6 2.326 1.07 1.4 0.7 C173800500015 234.6 2.346 7.5 2.0 1.6 C173800500016 236.0 2.360 9.2 0.6 0.6 C173800500017 239.0 2.390 15.7 0.2 0.2 C173800500018 242.0 2.420 6.8 0.8 0.8 C173800500019 ENDDATA 10 0 C173800500020 ENDSUBENT 19 0 C173800599999 ENDENTRY 5 0 C173899999999