ENTRY C2543 20200502 C197C254300000001 SUBENT C2543001 20200502 C197C254300100001 BIB 12 43 C254300100002 TITLE Isomer ratio measurements for the reaction C254300100003 29Si(18O,p2n)44m,44gSc C254300100004 AUTHOR (H.Groening,K.Aleklett,K.J.Moody,P.L.McGaughey, C254300100005 W.Loveland,G.T.Seaborg) C254300100006 REFERENCE (J,NP/A,389,80,1982) C254300100007 #doi:10.1016/0375-9474(82)90292-5 C254300100008 INSTITUTE (1USABRK) C254300100009 FACILITY (CYCLO,1USABRK) The Lawrence Berkeley Laboratory 88- C254300100010 inch cyclotron. C254300100011 SAMPLE The targets used in this experiment consisted of 90 C254300100012 to 100 microg/29Si02 evaporated onto 1.9 cm diameter, C254300100013 0.013 mm thick Ta foil backings. C254300100014 DETECTOR (GELI) C254300100015 METHOD (ACTIV,CHSEP) Each target was irradiated within 180 C254300100016 beam of one of eight energies 30,40,50,58.5,70,80,87 C254300100017 and 99 MeV which was provided by the Lawrence C254300100018 Berkeley Laboratory 88-inch cyclotron. The length of C254300100019 the irradiation period varied between 45 and 60 C254300100020 minutes. The Sc nuclei produced by the reaction C254300100021 recoiled into the Ta backing and were stopped. Their C254300100022 subsequent decays were measured after the end of the C254300100023 irradiation by gamma-ray spectroscopy using a Ge(Li) C254300100024 detector. For beam energies above 70 MeV, the 180 C254300100025 projectile energy exceeded the Coulomb barrier of the C254300100026 Ta target backing, allowing the production of C254300100027 activities with large cross sections that obscured C254300100028 those of interest. Therefore, a chemical separation C254300100029 was performed to isolate the Sc activities from the C254300100030 targets bombarded with the three highest energy C254300100031 beams. The chemical separation technique involved C254300100032 coprecipitation of Sc with LaF3. C254300100033 ANALYSIS (DECAY) Thus, by performing a standard analysis of C254300100034 the decay curve associated with the 1157 keV C254300100035 transition, the activity of each member of the isomer C254300100036 pair at the end of the irradiation was calculated. C254300100037 Using these activities and correcting for growth and C254300100038 decay during the irradiation and for the branching C254300100039 ratios to each decay mode, the final isomer ratios C254300100040 were computed. C254300100041 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C254300100042 DECAY-DATA (21-SC-44-G,3.927HR,DG,1.157,0.9989) C254300100043 (21-SC-44-M,2.442D,DG,0.271,0.866) C254300100044 HISTORY (20200502C) BP C254300100045 ENDBIB 43 0 C254300100046 NOCOMMON 0 0 C254300100047 ENDSUBENT 46 0 C254300199999 SUBENT C2543002 20200502 C197C254300200001 BIB 2 2 C254300200002 REACTION (14-SI-29(8-O-18,X)21-SC-44-M/G,,SIG/RAT) C254300200003 STATUS (TABLE) Table I, page 83. C254300200004 ENDBIB 2 0 C254300200005 NOCOMMON 0 0 C254300200006 DATA 3 8 C254300200007 EN DATA DATA-ERR C254300200008 MEV NO-DIM NO-DIM C254300200009 30.0 0.97 0.02 C254300200010 40.0 2.44 0.04 C254300200011 50.0 3.91 0.05 C254300200012 58.5 4.66 0.13 C254300200013 70.0 5.33 0.15 C254300200014 80.0 5.32 0.44 C254300200015 87.0 5.23 0.22 C254300200016 99.0 3.61 0.43 C254300200017 ENDDATA 10 0 C254300200018 ENDSUBENT 17 0 C254300299999 ENDENTRY 2 0 C254399999999