ENTRY O1284 20170419 O061O128400000001 SUBENT O1284001 20170419 O061O128400100001 BIB 15 79 O128400100002 TITLE Isobaric production cross sections from 0.6 GeV proton O128400100003 irradiation of neptunium and thorium using mass O128400100004 spectrometry O128400100005 AUTHOR (H.U.Wenger, A.Al Mazouzi, F.Atchison, M.Burghartz, O128400100006 R.Chawla, I.Gunther-Leopold, P.Heimgartner, Ch.Hellwig,O128400100007 F.Ingold, Z.Kopajtic, H.P.Linder) O128400100008 REFERENCE (J,NP/A,764,1,2006) O128400100009 REL-REF (N,,G.Ledergerber+,J,NT,114,194,1996). The wet O128400100010 fabrication route developed at PSI to form spherical O128400100011 fuel particles. O128400100012 (N,O0907001,H.U.Wenger+,J,ANE,26,141,1999) Previous O128400100013 results for natural uranium target. O128400100014 (R,,P.Marmy+,J,NIM/B,47,37,1990) Ring accelerator. O128400100015 INSTITUTE (2SWTPSI) O128400100016 (2SWTSWT) Ecole Polytechnique Federale de Lausanne. O128400100017 (2BLGMOL) O128400100018 SAMPLE The dense spherical ceramic particles of about 300 mum O128400100019 diameter. O128400100020 In the case of UO2 and ThO2, spherical particles of O128400100021 about 300 mum diameter were filled into the stainless O128400100022 steel target tubes, whereas for NpO2 large spheres wereO128400100023 first crushed to irregularly sized particles of O128400100024 90-300 mum. The 2.5 X 8 mm target tubes could thus O128400100025 contain about 150 mg of NpO2 particles, 240 mg of ThO2 O128400100026 and 250 mg of UO2 spheres, respectively. The targets O128400100027 were filled with helium and sealed. O128400100028 FACILITY (ACCEL,2SWTPSI) The PSI ring accelerator. O128400100029 (SPECM,2SWTPSI) Inductively coupled plasma mass O128400100030 spectrometer. O128400100031 MONITOR ((MONIT)13-AL-27(P,X)11-NA-22,CUM,SIG) O128400100032 The reference cross section is a weighted mean value ofO128400100033 the available experimental results in the energy rangeO128400100034 540-600 MeV. O128400100035 MONIT-REF (B0085001,J.E.Cline+,J,NP/A,169,437,1971) O128400100036 (,A.Grutter,J,ARI,33,725,1982) O128400100037 (,J.Tobailem,R,CEA-N-1466(5),103,1981) O128400100038 METHOD (EXTB,ACTIV) An irradiation head with three targets in O128400100039 series was used, which allowed the simultaneous O128400100040 irradiation of two actinide samples and an 27Al monitorO128400100041 rodlet, the targets themselves not affecting the protonO128400100042 beam significantly. O128400100043 COMMENT -By authors. High-fluence irradiations make it O128400100044 possible to produce enough fission and spallation O128400100045 products to use inductively coupled plasma mass O128400100046 spectrometry as the analytical technique. This method O128400100047 is the best for the measurement of isobaric production O128400100048 cross sections, since the cumulative isobaric mass O128400100049 yields in the beta-decay range, mass numbers <204, do O128400100050 not depend on time. O128400100051 CORRECTION For the correction of matrix effects, a known amount ofO128400100052 a thulium standard was added as an internal standard toO128400100053 all sample solutions. 169-Tm was selected as indicatorO128400100054 isotope since there was no detectable signal on mass O128400100055 169 in the concentrated solutions of both actinide O128400100056 targets. Thus, the possibility of interfering effectsO128400100057 with any fission product in this mass range could be O128400100058 excluded. O128400100059 Certain volatile and/or insoluble irradiation productsO128400100060 could not contribute to the measured mass yields and O128400100061 thus rendered the corresponding isobaric production O128400100062 cross sections too low. This was particularly the caseO128400100063 for several isotopes of the noble gases krypton and O128400100064 xenon, as well as for the insoluble oxides of palladiumO128400100065 and tin. The corresponding mass yields were upscaled O128400100066 by using calculated extrapolation factors, deduced by O128400100067 following a procedure similar to that used for resultsO128400100068 from gamma-spectrometry. The correction factor values O128400100069 were mostly in the range 1 to 3. For mass numbers 106,O128400100070 108, and 110, the insoluble oxides of palladium have O128400100071 dominant contributions, and the corresponding O128400100072 correction factors were between 3 and 6. O128400100073 ADD-RES (COMP) Codes FUSSPOT and HETC/RAL. The experimental O128400100074 Results are better predicted by the code FUSSPOT than O128400100075 by HETC/RAL. O128400100076 STATUS (TABLE) Data tables were received from H.U.Wenger O128400100077 HISTORY (20051216C) F.Ch O128400100078 (20060222R) Data tables were received from H.U.Wenger O128400100079 (20060302U) Last checking has been done. O128400100080 (20170419U) SD:Illegal blank deleted from author's listO128400100081 ENDBIB 79 0 O128400100082 COMMON 3 3 O128400100083 EN MONIT MONIT-ERR O128400100084 MEV MB MB O128400100085 590. 14.5 0.8 O128400100086 ENDCOMMON 3 0 O128400100087 ENDSUBENT 86 0 O128400199999 SUBENT O1284002 20060302 O026O128400200001 BIB 4 15 O128400200002 REACTION (93-NP-237(P,F),,SIG) O128400200003 ANALYSIS The total fission cross sections for the target O128400200004 nuclides have been made by first least-squares fitting O128400200005 Gaussian bell-shaped curves to each set of mass O128400200006 spectrometric results over the fission hump and then O128400200007 numerically integrating the corresponding curves. O128400200008 STATUS (DEP,O1284004) O128400200009 ERR-ANALYS (ERR-T) The error in the experimental fission cross O128400200010 sections. The uncertainty includes: O128400200011 (ERR-1) The uncertainty of mass spectrometric O128400200012 measurements. O128400200013 (ERR-2) The uncertainty of 27Al(P,X)22Na cross sectionO128400200014 for fluence determination. O128400200015 (ERR-3) The uncertainty of least squares fitting O128400200016 procedure. O128400200017 ENDBIB 15 0 O128400200018 COMMON 3 3 O128400200019 ERR-1 ERR-2 ERR-3 O128400200020 PER-CENT PER-CENT PER-CENT O128400200021 10. 5. 3. O128400200022 ENDCOMMON 3 0 O128400200023 DATA 2 1 O128400200024 DATA ERR-T O128400200025 B B O128400200026 1.82 0.33 O128400200027 ENDDATA 3 0 O128400200028 ENDSUBENT 27 0 O128400299999 SUBENT O1284003 20060302 O026O128400300001 BIB 4 15 O128400300002 REACTION (90-TH-232(P,F),,SIG) O128400300003 ANALYSIS The total fission cross sections for the target O128400300004 nuclides have been made by first least-squares fitting O128400300005 Gaussian bell-shaped curves to each set of mass O128400300006 spectrometric results over the fission hump and then O128400300007 numerically integrating the corresponding curves. O128400300008 STATUS (DEP,O1284005) O128400300009 ERR-ANALYS (ERR-T) The error in the experimental fission cross O128400300010 sections. The uncertainty includes: O128400300011 (ERR-1) The uncertainty of mass spectrometric O128400300012 measurements. O128400300013 (ERR-2) The uncertainty of 27Al(P,X)22Na cross sectionO128400300014 for fluence determination. O128400300015 (ERR-3) The uncertainty of least squares fitting O128400300016 procedure. O128400300017 ENDBIB 15 0 O128400300018 COMMON 3 3 O128400300019 ERR-1 ERR-2 ERR-3 O128400300020 PER-CENT PER-CENT PER-CENT O128400300021 10. 5. 3. O128400300022 ENDCOMMON 3 0 O128400300023 DATA 2 1 O128400300024 DATA ERR-T O128400300025 B B O128400300026 0.889 0.16 O128400300027 ENDDATA 3 0 O128400300028 ENDSUBENT 27 0 O128400399999 SUBENT O1284004 20060302 O026O128400400001 BIB 2 2 O128400400002 REACTION (93-NP-237(P,X)MASS,,SIG) O128400400003 ERR-ANALYS (ERR-T) The overall error is estimated to be about 10%O128400400004 ENDBIB 2 0 O128400400005 COMMON 1 3 O128400400006 ERR-T O128400400007 PER-CENT O128400400008 10. O128400400009 ENDCOMMON 3 0 O128400400010 DATA 2 71 O128400400011 MASS DATA O128400400012 NO-DIM MB O128400400013 69. 7.4 O128400400014 70. 2.2 O128400400015 71. 3.3 O128400400016 72. 5.6 O128400400017 73. 5.2 O128400400018 74. 5.4 O128400400019 77. 8.2 O128400400020 82. 9.9 O128400400021 85. 44.5 O128400400022 86. 55.4 O128400400023 87. 61.8 O128400400024 88. 65.3 O128400400025 91. 53.4 O128400400026 93. 87.3 O128400400027 99. 88.9 O128400400028 101. 83.7 O128400400029 102. 80.2 O128400400030 103. 83.3 O128400400031 104. 64.2 O128400400032 106. 79.4 O128400400033 108. 26.8 O128400400034 109. 76. O128400400035 110. 48.8 O128400400036 111. 66.1 O128400400037 112. 65.9 O128400400038 113. 63.3 O128400400039 114. 67.6 O128400400040 115. 68.2 O128400400041 116. 53.9 O128400400042 117. 50.5 O128400400043 120. 42. O128400400044 121. 26. O128400400045 122. 24.1 O128400400046 123. 17.4 O128400400047 124. 19.7 O128400400048 125. 31.7 O128400400049 128. 23.1 O128400400050 130. 69.2 O128400400051 133. 52. O128400400052 134. 44.7 O128400400053 135. 44.1 O128400400054 136. 42.9 O128400400055 137. 40.4 O128400400056 138. 45.8 O128400400057 139. 36. O128400400058 140. 31.7 O128400400059 141. 27.6 O128400400060 142. 23.8 O128400400061 143. 22. O128400400062 144. 18.9 O128400400063 145. 16.2 O128400400064 146. 13.1 O128400400065 147. 10.6 O128400400066 148. 8.3 O128400400067 149. 7.2 O128400400068 150. 5.3 O128400400069 151. 4.5 O128400400070 152. 3.2 O128400400071 153. 2.5 O128400400072 154. 2. O128400400073 155. 1.4 O128400400074 156. 0.93 O128400400075 157. 0.44 O128400400076 194. 0.19 O128400400077 195. 0.7 O128400400078 204. 5. O128400400079 206. 67.5 O128400400080 207. 69.3 O128400400081 208. 149.2 O128400400082 209. 115.2 O128400400083 232. 93.8 O128400400084 ENDDATA 73 0 O128400400085 ENDSUBENT 84 0 O128400499999 SUBENT O1284005 20060302 O026O128400500001 BIB 2 2 O128400500002 REACTION (90-TH-232(P,X)MASS,,SIG) O128400500003 ERR-ANALYS (ERR-T) The overall error is estimated to be about 10%O128400500004 ENDBIB 2 0 O128400500005 COMMON 1 3 O128400500006 ERR-T O128400500007 PER-CENT O128400500008 10. O128400500009 ENDCOMMON 3 0 O128400500010 DATA 2 57 O128400500011 MASS DATA O128400500012 NO-DIM MB O128400500013 77. 4.1 O128400500014 85. 15.4 O128400500015 86. 21.4 O128400500016 87. 24.7 O128400500017 88. 24.3 O128400500018 89. 30.3 O128400500019 91. 30.9 O128400500020 93. 30.7 O128400500021 99. 41.5 O128400500022 101. 37.5 O128400500023 102. 35.7 O128400500024 103. 35.9 O128400500025 104. 33.4 O128400500026 106. 46.7 O128400500027 108. 15.6 O128400500028 109. 43.8 O128400500029 110. 28.4 O128400500030 111. 45.1 O128400500031 112. 42.8 O128400500032 113. 40.7 O128400500033 114. 43.8 O128400500034 115. 57.9 O128400500035 117. 28.2 O128400500036 118. 23.1 O128400500037 120. 14.6 O128400500038 121. 20.8 O128400500039 122. 17. O128400500040 123. 12.6 O128400500041 126. 25.7 O128400500042 128. 9.6 O128400500043 130. 26. O128400500044 133. 14.9 O128400500045 134. 15.2 O128400500046 135. 14.1 O128400500047 136. 11.3 O128400500048 137. 11.5 O128400500049 138. 12. O128400500050 139. 11.7 O128400500051 140. 8.6 O128400500052 141. 8.3 O128400500053 142. 8.1 O128400500054 143. 6. O128400500055 144. 5. O128400500056 145. 3.3 O128400500057 146. 2.4 O128400500058 147. 1.5 O128400500059 148. 0.84 O128400500060 149. 0.33 O128400500061 195. 1.7 O128400500062 197. 6.2 O128400500063 203. 7.3 O128400500064 204. 23.5 O128400500065 205. 12. O128400500066 206. 55.7 O128400500067 207. 95.6 O128400500068 208. 72.9 O128400500069 209. 94.1 O128400500070 ENDDATA 59 0 O128400500071 ENDSUBENT 70 0 O128400599999 SUBENT O1284006 20060302 O026O128400600001 BIB 2 2 O128400600002 REACTION (92-U-0(P,X)MASS,,SIG) O128400600003 ERR-ANALYS (ERR-T) The overall error is estimated to be about 10%O128400600004 ENDBIB 2 0 O128400600005 COMMON 1 3 O128400600006 ERR-T O128400600007 PER-CENT O128400600008 10. O128400600009 ENDCOMMON 3 0 O128400600010 DATA 2 55 O128400600011 MASS DATA O128400600012 NO-DIM MB O128400600013 69. 13.3 O128400600014 85. 15. O128400600015 86. 20. O128400600016 87. 56.8 O128400600017 88. 74.1 O128400600018 89. 81. O128400600019 91. 105.1 O128400600020 92. 134.2 O128400600021 93. 74.6 O128400600022 94. 123.2 O128400600023 95. 83.4 O128400600024 96. 92.6 O128400600025 97. 83.5 O128400600026 98. 78. O128400600027 99. 79.6 O128400600028 100. 80.4 O128400600029 101. 67.1 O128400600030 102. 64.6 O128400600031 103. 64.7 O128400600032 104. 57.6 O128400600033 108. 39.3 O128400600034 109. 68.8 O128400600035 110. 41.5 O128400600036 111. 63.9 O128400600037 112. 61.8 O128400600038 113. 60.3 O128400600039 114. 62.7 O128400600040 115. 76.3 O128400600041 120. 58.1 O128400600042 121. 72.7 O128400600043 122. 43.7 O128400600044 123. 41.7 O128400600045 124. 33.2 O128400600046 125. 53.2 O128400600047 130. 40.9 O128400600048 133. 34.1 O128400600049 134. 31.7 O128400600050 135. 38.1 O128400600051 136. 32.7 O128400600052 137. 35.5 O128400600053 138. 56.3 O128400600054 139. 30.1 O128400600055 140. 26.3 O128400600056 141. 14.8 O128400600057 142. 19.2 O128400600058 143. 14.5 O128400600059 144. 11.4 O128400600060 145. 9.6 O128400600061 146. 6.3 O128400600062 147. 5.2 O128400600063 204. 9.1 O128400600064 206. 64.4 O128400600065 207. 68.1 O128400600066 208. 123.4 O128400600067 209. 10.2 O128400600068 ENDDATA 57 0 O128400600069 ENDSUBENT 68 0 O128400699999 ENDENTRY 6 0 O128499999999