ENTRY C2603 20210320 C202C260300000001 SUBENT C2603001 20210320 C202C260300100001 BIB 11 37 C260300100002 TITLE Measurement of the 230Th(p,2n)229Pa and 230Th(p,3n) C260300100003 228Pa reaction cross sections from 14.1 to 16.9 MeV C260300100004 AUTHOR (K.N.Kmak,D.A.Shaughnessy,J.Vujic) C260300100005 INSTITUTE (1USAUCX,1USALRL) C260300100006 REFERENCE (J,PR/C,103,034610,2021) C260300100007 FACILITY (VDGT,1USALRL) Experiment performed at the Center for C260300100008 Accelerator Mass Spectrometry at Lawrence Livermore C260300100009 National Laboratory using 10 MV tandem accelerator C260300100010 SAMPLE Thorium was separated from uranium ore. The final C260300100011 product was 91.32+-0.77 mg of thorium with a purity C260300100012 of 99.5+-1.2 wt%. Isotope ratio 230Th/232Th was C260300100013 determined by mass spectrometry to be 0.0922+-0.00150. C260300100014 In experiment a target stack was used to degrade beam C260300100015 energy. Stack consisted of C260300100016 - thin tantalum cover foil 5 mu-m thick C260300100017 - ThO2 target with thickness ranging from C260300100018 921.710+-0.005 to 1913.309+-0.005 mu-g Th/cm2 on C260300100019 Ti backing (cover) 2 mu-m thick C260300100020 - Y monitor foil C260300100021 - spacer foil Ta (10 mu-m) or Pt (25 mu-m) C260300100022 - ThO2 target on Ti backing C260300100023 - spacer foil Ta (10 mu-m) or Pt (25 mu-m) C260300100024 - ThO2 target on Ti backing C260300100025 - Beam stop C260300100026 Together 8 target foils were irradiated. In first C260300100027 experiment stack with two target foils without spacers C260300100028 was used. C260300100029 (90-TH-230,ENR=0.0844) C260300100030 (90-TH-232,ENR=0.9156) C260300100031 DETECTOR (HPGE) Gamma ray spectra were measured using GPGe C260300100032 detectorsaas well as low energy photon spectcrometer C260300100033 (LAPS) detector. C260300100034 METHOD (ACTIV,CHSEP) Column chromatography was used to C260300100035 separate protactinium. C260300100036 MONITOR (39-Y-89(P,N)40-ZR-89,,SIG) C260300100037 ERR-ANALYS (DATA-ERR) Source of uncertainties not described C260300100038 HISTORY (20210320C) Compiled by S.H. C260300100039 ENDBIB 37 0 C260300100040 NOCOMMON 0 0 C260300100041 ENDSUBENT 40 0 C260300199999 SUBENT C2603002 20210320 C202C260300200001 BIB 3 5 C260300200002 REACTION (90-TH-230(P,2N)91-PA-229,,SIG) C260300200003 DECAY-DATA (91-PA-229,1.50D,DG,119.0,0.00129, C260300200004 XR,89.957,0.182, C260300200005 XR,93.35,0.293) C260300200006 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C260300200007 ENDBIB 5 0 C260300200008 NOCOMMON 0 0 C260300200009 DATA 4 6 C260300200010 EN EN-RSL DATA DATA-ERR C260300200011 MEV MEV MB MB C260300200012 16.9 0.1 107. 15. C260300200013 16.0 0.1 148. 9. C260300200014 15.7 0.14 156. 16. C260300200015 14.9 0.1 163. 32. C260300200016 14.4 0.1 182. 12. C260300200017 14.1 0.1 166. 32. C260300200018 ENDDATA 8 0 C260300200019 ENDSUBENT 18 0 C260300299999 SUBENT C2603003 20210320 C202C260300300001 BIB 3 10 C260300300002 REACTION (90-TH-230(P,3N)91-PA-228,,SIG) C260300300003 DECAY-DATA (91-PA-228,19.5HR,DG,129.065,0.426, C260300300004 DG,338.320,0.076, C260300300005 DG,409.462,0.093, C260300300006 DG,911.204,0.23, C260300300007 XR,89.957,0.257, C260300300008 XR,93.350,0.419) C260300300009 Half-life was measured by authors as 19.5+-0.4 hr, C260300300010 which is different from the value used in literature. C260300300011 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C260300300012 ENDBIB 10 0 C260300300013 NOCOMMON 0 0 C260300300014 DATA 4 3 C260300300015 EN EN-RSL DATA DATA-ERR C260300300016 MEV MEV MB MB C260300300017 16.9 0.1 23. 1.3 C260300300018 16.0 0.1 1.6 0.15 C260300300019 15.7 0.14 2.7 1.6 C260300300020 ENDDATA 5 0 C260300300021 ENDSUBENT 20 0 C260300399999 SUBENT C2603004 20210320 C202C260300400001 BIB 3 10 C260300400002 REACTION (90-TH-232(P,N)91-PA-232,,SIG) C260300400003 DECAY-DATA (91-PA-232,1.31D,DG,150.059,0.104, C260300400004 DG,387.884,0.0655, C260300400005 DG,581.398,0.0618, C260300400006 DG,819.187,0.0734, C260300400007 DG,866.760,0.0734, C260300400008 DG,969.315,0.423, C260300400009 XR,94.654,0.0101, C260300400010 XR,98.434,0.0162) C260300400011 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C260300400012 ENDBIB 10 0 C260300400013 NOCOMMON 0 0 C260300400014 DATA 4 6 C260300400015 EN EN-RSL DATA DATA-ERR C260300400016 MEV MEV MB MB C260300400017 16.9 0.1 17.3 1.0 C260300400018 16.0 0.1 14.7 0.8 C260300400019 15.7 0.14 15.2 0.7 C260300400020 14.9 0.1 12.0 0.7 C260300400021 14.4 0.1 12.1 0.7 C260300400022 14.1 0.1 11.7 0.7 C260300400023 ENDDATA 8 0 C260300400024 ENDSUBENT 23 0 C260300499999 ENDENTRY 4 0 C260399999999