ENTRY C3085 20250825 C308500000001 SUBENT C3085001 20250825 20260228 C308500100001 BIB 10 62 C308500100002 TITLE Actinium isotope cross sections for 226Ra(p,xn) C308500100003 reactions measured at low energies C308500100004 AUTHOR (D.Horn,E.T.Rand,R.Perron,A.Abushusheh,M.Facina, C308500100005 D.Gendron,K.McCaugherty,J.Sheardown) C308500100006 REFERENCE (J,ARI,212,111427,2024) C308500100007 #doi:10.1016/j.apradiso.2024.111427 C308500100008 INSTITUTE (1CANCRC) C308500100009 FACILITY (CYCLO,1USADAV) A variable-energy 76-inch isochronous C308500100010 cyclotron, the Crocker Nuclear Laboratory of the C308500100011 University of California at Davis. C308500100012 DETECTOR (HPGE) A Canberra high-purity germanium detector C308500100013 (model GC2518). C308500100014 SAMPLE The 226Ra as radium sulfate precipitates were then C308500100015 deposited by vacuum filtration onto 10 microm thick C308500100016 track-etched polycarbonate (PCTE) membrane filters C308500100017 of 0.2 microm porosity (Sterlitech PCT0225100). The C308500100018 targets contained 810+-85 kBq (21.9+-2.3 microg) of C308500100019 226Ra deposited on the filtration membrane. The C308500100020 implied thickness of the 226Ra on the filtration C308500100021 membrane was 120 microg/cm2, though the thickness was C308500100022 not measured. C308500100023 Proton Energy Target Initial 226Ra ActivityC308500100024 (MeV) Identifier (Bq) C308500100025 15.1 Target 10 6.51E+05 C308500100026 16.0 Target 11 7.38E+05 C308500100027 16.8 Target 9 7.85E+05 C308500100028 METHOD (ACTIV) The principle of the measurement technique is C308500100029 to quantify decay product activities after C308500100030 irradiation, relative to the number of beam-target C308500100031 interactions, as monitored by elastic scattering of C308500100032 the protons from the radium target. C308500100033 ERR-ANALYS (ERR-T) The errors considered in analysis of the C308500100034 226Ra(p,xn) cross sections include systematic C308500100035 uncertainties for the technique as well as counting C308500100036 statistics and fitting uncertainties for each C308500100037 measurement. Uncertainties assigned to the C308500100038 226Ra(p,xn) cross section results are obtained by C308500100039 propagation of the above sources of error. Some, such C308500100040 as the offline counting statistics for a single C308500100041 acquisition session, are independent, affecting only C308500100042 a single result. Others, like the proton peak C308500100043 integration, affect the values for all isotopes C308500100044 studied at one energy. Finally, systematic errors in C308500100045 determining, for example, the proton scattering C308500100046 detector acceptance aperture, affect the scale of the C308500100047 entire data set, but do not disturb the internal C308500100048 consistency of relative cross section comparisons. In C308500100049 the following summary, absolute uncertainties for C308500100050 each cross section are estimated, but the relative C308500100051 errors, for example in the ratio between 224Ac and C308500100052 225Ac cross sections, may be less and are not C308500100053 addressed. Combined in quadrature, the above C308500100054 measurement uncertainties result in overall 1-sigma C308500100055 uncertainties ranging from 8.2% to 14.9% on the C308500100056 reaction cross sections. C308500100057 (ERR-1) Model dependence. C308500100058 (ERR-2) Defining Apertures. C308500100059 (ERR-3) Systematic uncertainties in gamma-ray analysis.C308500100060 (ERR-4) Scattering angle. C308500100061 (ERR-5) Beam energy, The elastic scattering cross C308500100062 section variation. C308500100063 HISTORY (20250825C) BP C308500100064 ENDBIB 62 0 C308500100065 COMMON 6 3 C308500100066 EN-RSL ERR-1 ERR-2 ERR-3 ERR-4 ERR-5 C308500100067 MEV PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT C308500100068 0.1 4.4 3.0 3.8 5.0 1.5C308500100069 ENDCOMMON 3 0 C308500100070 ENDSUBENT 69 0 C308500199999 SUBENT C3085002 20250825 20260228 C308500200001 BIB 5 7 C308500200002 REACTION (88-RA-226(P,2N)89-AC-225,,SIG) C308500200003 RAD-DET (84-PO-213,A) C308500200004 DETECTOR (SI) CANBERRA's Passivated Implanted Planar Silicon C308500200005 (PIPS) Detector (Canberra model PD-450-15-500 a.m.). C308500200006 DECAY-DATA (84-PO-213,,A,8376.) C308500200007 (89-AC-225,9.920D) C308500200008 STATUS (TABLE,,D.Horn+,J,ARI,212,111427,2024) Table - 4 C308500200009 ENDBIB 7 0 C308500200010 NOCOMMON 0 0 C308500200011 DATA 3 3 C308500200012 EN DATA ERR-T C308500200013 MEV MB MB C308500200014 15.1 478.0 70.0 C308500200015 16.0 698.0 65.0 C308500200016 16.8 628.0 55.0 C308500200017 ENDDATA 5 0 C308500200018 ENDSUBENT 17 0 C308500299999 SUBENT C3085003 20250825 20260228 C308500300001 BIB 3 3 C308500300002 REACTION (88-RA-226(P,3N)89-AC-224,,SIG) C308500300003 DECAY-DATA (89-AC-224,2.8HR,DG,215.75,0.5230) C308500300004 STATUS (TABLE,,D.Horn+,J,ARI,212,111427,2024) Table - 4 C308500300005 ENDBIB 3 0 C308500300006 NOCOMMON 0 0 C308500300007 DATA 3 3 C308500300008 EN DATA ERR-T C308500300009 MEV MB MB C308500300010 15.1 163.0 25.0 C308500300011 16.0 302.0 27.0 C308500300012 16.8 629.0 55.0 C308500300013 ENDDATA 5 0 C308500300014 ENDSUBENT 13 0 C308500399999 SUBENT C3085004 20250825 20260228 C308500400001 BIB 3 3 C308500400002 REACTION (88-RA-226(P,N)89-AC-226,,SIG) C308500400003 DECAY-DATA (89-AC-226,29.4HR,DG,230.0,0.269) C308500400004 STATUS (TABLE,,D.Horn+,J,ARI,212,111427,2024) Table - 6 C308500400005 ENDBIB 3 0 C308500400006 NOCOMMON 0 0 C308500400007 DATA 2 3 C308500400008 EN DATA-MAX C308500400009 MEV MB C308500400010 15.1 35.3 C308500400011 16.0 36.0 C308500400012 16.8 36.9 C308500400013 ENDDATA 5 0 C308500400014 ENDSUBENT 13 0 C308500499999 ENDENTRY 4 0 C308599999999