ENTRY C2603 20210320 C202C2603 0 1 SUBENT C2603001 20210320 C202C2603 1 1 BIB 11 37 C2603 1 2 TITLE Measurement of the 230Th(p,2n)229Pa and 230Th(p,3n) C2603 1 3 228Pa reaction cross sections from 14.1 to 16.9 MeV C2603 1 4 AUTHOR (K.N.Kmak,D.A.Shaughnessy,J.Vujic) C2603 1 5 INSTITUTE (1USAUCX,1USALRL) C2603 1 6 REFERENCE (J,PR/C,103,034610,2021) C2603 1 7 FACILITY (VDGT,1USALRL) Experiment performed at the Center for C2603 1 8 Accelerator Mass Spectrometry at Lawrence Livermore C2603 1 9 National Laboratory using 10 MV tandem accelerator C2603 1 10 SAMPLE Thorium was separated from uranium ore. The final C2603 1 11 product was 91.32+-0.77 mg of thorium with a purity C2603 1 12 of 99.5+-1.2 wt%. Isotope ratio 230Th/232Th was C2603 1 13 determined by mass spectrometry to be 0.0922+-0.00150. C2603 1 14 In experiment a target stack was used to degrade beam C2603 1 15 energy. Stack consisted of C2603 1 16 - thin tantalum cover foil 5 mu-m thick C2603 1 17 - ThO2 target with thickness ranging from C2603 1 18 921.710+-0.005 to 1913.309+-0.005 mu-g Th/cm2 on C2603 1 19 Ti backing (cover) 2 mu-m thick C2603 1 20 - Y monitor foil C2603 1 21 - spacer foil Ta (10 mu-m) or Pt (25 mu-m) C2603 1 22 - ThO2 target on Ti backing C2603 1 23 - spacer foil Ta (10 mu-m) or Pt (25 mu-m) C2603 1 24 - ThO2 target on Ti backing C2603 1 25 - Beam stop C2603 1 26 Together 8 target foils were irradiated. In first C2603 1 27 experiment stack with two target foils without spacers C2603 1 28 was used. C2603 1 29 (90-TH-230,ENR=0.0844) C2603 1 30 (90-TH-232,ENR=0.9156) C2603 1 31 DETECTOR (HPGE) Gamma ray spectra were measured using GPGe C2603 1 32 detectorsaas well as low energy photon spectcrometer C2603 1 33 (LAPS) detector. C2603 1 34 METHOD (ACTIV,CHSEP) Column chromatography was used to C2603 1 35 separate protactinium. C2603 1 36 MONITOR (39-Y-89(P,N)40-ZR-89,,SIG) C2603 1 37 ERR-ANALYS (DATA-ERR) Source of uncertainties not described C2603 1 38 HISTORY (20210320C) Compiled by S.H. C2603 1 39 ENDBIB 37 0 C2603 1 40 NOCOMMON 0 0 C2603 1 41 ENDSUBENT 40 0 C2603 199999 SUBENT C2603002 20210320 C202C2603 2 1 BIB 3 5 C2603 2 2 REACTION (90-TH-230(P,2N)91-PA-229,,SIG) C2603 2 3 DECAY-DATA (91-PA-229,1.50D,DG,119.0,0.00129, C2603 2 4 XR,89.957,0.182, C2603 2 5 XR,93.35,0.293) C2603 2 6 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C2603 2 7 ENDBIB 5 0 C2603 2 8 NOCOMMON 0 0 C2603 2 9 DATA 4 6 C2603 2 10 EN EN-RSL DATA DATA-ERR C2603 2 11 MEV MEV MB MB C2603 2 12 16.9 0.1 107. 15. C2603 2 13 16.0 0.1 148. 9. C2603 2 14 15.7 0.14 156. 16. C2603 2 15 14.9 0.1 163. 32. C2603 2 16 14.4 0.1 182. 12. C2603 2 17 14.1 0.1 166. 32. C2603 2 18 ENDDATA 8 0 C2603 2 19 ENDSUBENT 18 0 C2603 299999 SUBENT C2603003 20210320 C202C2603 3 1 BIB 3 10 C2603 3 2 REACTION (90-TH-230(P,3N)91-PA-228,,SIG) C2603 3 3 DECAY-DATA (91-PA-228,19.5HR,DG,129.065,0.426, C2603 3 4 DG,338.320,0.076, C2603 3 5 DG,409.462,0.093, C2603 3 6 DG,911.204,0.23, C2603 3 7 XR,89.957,0.257, C2603 3 8 XR,93.350,0.419) C2603 3 9 Half-life was measured by authors as 19.5+-0.4 hr, C2603 3 10 which is different from the value used in literature. C2603 3 11 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C2603 3 12 ENDBIB 10 0 C2603 3 13 NOCOMMON 0 0 C2603 3 14 DATA 4 3 C2603 3 15 EN EN-RSL DATA DATA-ERR C2603 3 16 MEV MEV MB MB C2603 3 17 16.9 0.1 23. 1.3 C2603 3 18 16.0 0.1 1.6 0.15 C2603 3 19 15.7 0.14 2.7 1.6 C2603 3 20 ENDDATA 5 0 C2603 3 21 ENDSUBENT 20 0 C2603 399999 SUBENT C2603004 20210320 C202C2603 4 1 BIB 3 10 C2603 4 2 REACTION (90-TH-232(P,N)91-PA-232,,SIG) C2603 4 3 DECAY-DATA (91-PA-232,1.31D,DG,150.059,0.104, C2603 4 4 DG,387.884,0.0655, C2603 4 5 DG,581.398,0.0618, C2603 4 6 DG,819.187,0.0734, C2603 4 7 DG,866.760,0.0734, C2603 4 8 DG,969.315,0.423, C2603 4 9 XR,94.654,0.0101, C2603 4 10 XR,98.434,0.0162) C2603 4 11 STATUS (TABLE) Data taken from tab.1 of the reference PR/C C2603 4 12 ENDBIB 10 0 C2603 4 13 NOCOMMON 0 0 C2603 4 14 DATA 4 6 C2603 4 15 EN EN-RSL DATA DATA-ERR C2603 4 16 MEV MEV MB MB C2603 4 17 16.9 0.1 17.3 1.0 C2603 4 18 16.0 0.1 14.7 0.8 C2603 4 19 15.7 0.14 15.2 0.7 C2603 4 20 14.9 0.1 12.0 0.7 C2603 4 21 14.4 0.1 12.1 0.7 C2603 4 22 14.1 0.1 11.7 0.7 C2603 4 23 ENDDATA 8 0 C2603 4 24 ENDSUBENT 23 0 C2603 499999 ENDENTRY 4 0 C260399999999