ENTRY L0286 20250219 L055L028600000001 SUBENT L0286001 20250219 L055L028600100001 BIB 13 52 L028600100002 TITLE Photon Activation Analysis in Gallium, Nickel, and L028600100003 Vanadium L028600100004 AUTHOR (R.Bentley,G.Santistevan,D.Wells,A.Hutton,A.Stavola, L028600100005 S.Benson,K.Jordan,J.Gubeli,P.Degtiarenko,L.Dabill) L028600100006 REFERENCE (J,NSE,198,158,2024) L028600100007 #doi:10.1080/00295639.2023.2180265 L028600100008 INSTITUTE (1USACBF) L028600100009 (1USAUSA) New Mexico Institute of Mining and L028600100010 Technology, 801 Leroy Place, Socorro, New Mexico 87801 L028600100011 (1USAUSA) Coe College, 1220 First Avenue NE, L028600100012 Cedar Rapids, Iowa 52402 L028600100013 FACILITY (LINAC,1USACBF) The Low Energy Recirculator Facility L028600100014 at the Thomas Jefferson National Accelerator Facility L028600100015 (JLab). L028600100016 INC-SOURCE (BRST) Bremsstrahlung flux was induced by an electron L028600100017 linac and a 1-mm tungsten radiator. L028600100018 DETECTOR (HPGE) A high-purity germanium gamma-ray spectrometer. L028600100019 SAMPLE The target crucible had a depression drilled on the L028600100020 face to house approximately 50.9 mg of gallium oxide L028600100021 powder, or 60 mg for the compressed pellet. Kapton L028600100022 tape held the powder in place. Then, the remaining L028600100023 two foils were stacked atop this so as to receive a L028600100024 nearly identical bremsstrahlung flux. The vanadium L028600100025 foil was 100 microm thick while the nickel foil was L028600100026 10 microm thick. The stack was placed 1 cm beyond the L028600100027 radiator on the beam axis. L028600100028 METHOD (ACTIV) Post-irradiation and cooling, the target was L028600100029 transported to a gamma-ray spectrometer to analyze L028600100030 the samples individually. The JLab Radiation Control L028600100031 Department performed a series of HPGe gamma L028600100032 spectroscopy measurements on the foils in order to L028600100033 estimate activation. The HPGe detector has a 23% L028600100034 relative efficiency for 60Co, a beryllium window with L028600100035 a thickness of 57 mm, and a 49-mm active diameter. L028600100036 Calibrations for the various foils were determined L028600100037 via Canberra In-situ Object Counting System Software L028600100038 (ISOCS). L028600100039 MONITOR (28-NI-58(G,N)28-NI-57,,SIG) L028600100040 MONIT-REF (,S.C.Fultz+,J,PR/C,10,608,1974) L028600100041 ERR-ANALYS (ERR-S) The uncertainties in this paper regarding the L028600100042 bremsstrahlung weighted cross section of the L028600100043 58Ni(g,n)57Ni cross section were not propagated. The L028600100044 reason for this lies in the normalization via the L028600100045 photon flux. The systematic errors from this flux are L028600100046 calculated the same. Then, as we normalize to that L028600100047 flux [i.e., take the ratios], errors stemming from L028600100048 this largely cancel and do not contribute L028600100049 substantially to the errors reported. Furthermore, L028600100050 note that the random statistical uncertainties of the L028600100051 simulations are very small in comparison to the L028600100052 experimental statistical uncertainties. L028600100053 HISTORY (20250219C) BP L028600100054 ENDBIB 52 0 L028600100055 NOCOMMON 0 0 L028600100056 ENDSUBENT 55 0 L028600199999 SUBENT L0286002 20250219 L055L028600200001 BIB 5 22 L028600200002 REACTION (23-V-51(G,A)21-SC-47,,SIG,,BRA) L028600200003 SAMPLE V target mass 0.050 g. L028600200004 METHOD (ACTIV) First Irradiation, 3600 sec. Measurements for L028600200005 the first irradiation were carried out in two L028600200006 different configurations: a full stack of foils and L028600200007 the gallium oxide powder individually. The stack L028600200008 measurement was initially made at 30 cm for 1 h. The L028600200009 stack was then measured at 30 cm for 12 h. A final L028600200010 1-h measurement was made at 10.5 cm. The gallium L028600200011 oxide powder was measured once for 3.35 h at 1.3 cm. L028600200012 DECAY-DATA (21-SC-47,3.3D,DG,91.265,0.0311, L028600200013 DG,93.310,0.3881, L028600200014 DG,184.576,0.2141, L028600200015 DG,208.95,0.0246, L028600200016 DG,300.217,0.1664, L028600200017 DG,393.527,0.0456, L028600200018 DG,494.166,0.000684, L028600200019 DG,703.106,0.000105, L028600200020 DG,794.381,0.000540, L028600200021 DG,887.688,0.0148) L028600200022 STATUS (TABLE,,R.Bentley+,J,NSE,198,158,2024) Table VI L028600200023 (COREL,L0286003) Data from 2nd irradiation. L028600200024 ENDBIB 22 0 L028600200025 NOCOMMON 0 0 L028600200026 DATA 3 1 L028600200027 EN-MAX DATA ERR-S L028600200028 MEV MB MB L028600200029 30.9 0.235 0.016 L028600200030 ENDDATA 3 0 L028600200031 ENDSUBENT 30 0 L028600299999 SUBENT L0286003 20250219 L055L028600300001 BIB 5 21 L028600300002 REACTION (23-V-51(G,A)21-SC-47,,SIG,,BRA) L028600300003 SAMPLE V target mass 0.0493 g. L028600300004 METHOD (ACTIV) Second Irradiation, 3990 sec. The second L028600300005 irradiation measurements began with individual L028600300006 measurements of the gallium pellet. Three counts were L028600300007 taken sequentially at 18, 12, and 48 h. These were L028600300008 all taken at 10.5 cm. Activities taken from every L028600300009 measurement were scaled back to immediately L028600300010 postirradiation. L028600300011 DECAY-DATA (21-SC-47,3.3D,DG,91.265,0.0311, L028600300012 DG,93.310,0.3881, L028600300013 DG,184.576,0.2141, L028600300014 DG,208.95,0.0246, L028600300015 DG,300.217,0.1664, L028600300016 DG,393.527,0.0456, L028600300017 DG,494.166,0.000684, L028600300018 DG,703.106,0.000105, L028600300019 DG,794.381,0.000540, L028600300020 DG,887.688,0.0148) L028600300021 STATUS (TABLE,,R.Bentley+,J,NSE,198,158,2024) Table VI L028600300022 (COREL,L0286002) Data from 1st irradiation. L028600300023 ENDBIB 21 0 L028600300024 NOCOMMON 0 0 L028600300025 DATA 3 1 L028600300026 EN-MAX DATA ERR-S L028600300027 MEV MB MB L028600300028 31.5 0.202 0.012 L028600300029 ENDDATA 3 0 L028600300030 ENDSUBENT 29 0 L028600399999 SUBENT L0286004 20250219 L055L028600400001 BIB 5 19 L028600400002 REACTION (31-GA-71(G,A)29-CU-67,,SIG,,BRA) L028600400003 SAMPLE (31-GA-71,ENR=0.9878) L028600400004 (31-GA-69,ENR=0.0122) Ga target mass 0.100 g. L028600400005 METHOD (ACTIV) First Irradiation, 3600 sec. Measurements for L028600400006 the first irradiation were carried out in two L028600400007 different configurations: a full stack of foils and L028600400008 the gallium oxide powder individually. The stack L028600400009 measurement was initially made at 30 cm for 1 h. The L028600400010 stack was then measured at 30 cm for 12 h. A final L028600400011 1-h measurement was made at 10.5 cm. The gallium L028600400012 oxide powder was measured once for 3.35 h at 1.3 cm. L028600400013 DECAY-DATA (29-CU-67,2.6D,DG,91.266,0.070, L028600400014 DG,93.311,0.161, L028600400015 DG,184.577,0.487, L028600400016 DG,208.951,0.00115, L028600400017 DG,300.219,0.00797, L028600400018 DG,393.529,0.00220) L028600400019 STATUS (TABLE,,R.Bentley+,J,NSE,198,158,2024) Table VI L028600400020 (COREL,L0286005) Data from 2nd irradiation. L028600400021 ENDBIB 19 0 L028600400022 NOCOMMON 0 0 L028600400023 DATA 3 1 L028600400024 EN-MAX DATA ERR-S L028600400025 MEV MB MB L028600400026 30.9 0.074 0.003 L028600400027 ENDDATA 3 0 L028600400028 ENDSUBENT 27 0 L028600499999 SUBENT L0286005 20250219 L055L028600500001 BIB 5 18 L028600500002 REACTION (31-GA-71(G,A)29-CU-67,,SIG,,BRA) L028600500003 SAMPLE (31-GA-71,ENR=0.9960) L028600500004 (31-GA-69,ENR=0.0040) Ga target mass 0.250 g. L028600500005 METHOD (ACTIV) Second Irradiation, 3990 sec. The second L028600500006 irradiation measurements began with individual L028600500007 measurements of the gallium pellet. Three counts were L028600500008 taken sequentially at 18, 12, and 48 h. These were L028600500009 all taken at 10.5 cm. Activities taken from every L028600500010 measurement were scaled back to immediately L028600500011 postirradiation. L028600500012 DECAY-DATA (29-CU-67,2.6D,DG,91.266,0.070, L028600500013 DG,93.311,0.161, L028600500014 DG,184.577,0.487, L028600500015 DG,208.951,0.00115, L028600500016 DG,300.219,0.00797, L028600500017 DG,393.529,0.00220) L028600500018 STATUS (TABLE,,R.Bentley+,J,NSE,198,158,2024) Table VI L028600500019 (COREL,L0286004) Data from 1st irradiation. L028600500020 ENDBIB 18 0 L028600500021 NOCOMMON 0 0 L028600500022 DATA 3 1 L028600500023 EN-MAX DATA ERR-S L028600500024 MEV MB MB L028600500025 31.5 0.070 0.002 L028600500026 ENDDATA 3 0 L028600500027 ENDSUBENT 26 0 L028600599999 ENDENTRY 5 0 L028699999999