ENTRY T0129 20170403 C166T012900000001 SUBENT T0129001 20170403 C166T012900100001 BIB 12 35 T012900100002 TITLE Excitation functions for spallation products and T012900100003 fission isomers in 237Np(4He,xn)241(-x)Am reactions T012900100004 AUTHOR (A.Fleury,F.H.Ruddy,M.N.Namboodiri,J.M.Alexander) T012900100005 REFERENCE (J,PR/C,7,1231,1973) T012900100006 #doi:10.1103/PhysRevC.7.1231 T012900100007 INSTITUTE (1USASTB) T012900100008 FACILITY (ISOCY,1USABNL) T012900100009 (VDGT,1USASTB) beam energies of the cyclotron were T012900100010 calibrated against the Van de Graaff accelerator by T012900100011 measuring the pulse heights of alpha particles T012900100012 scattered from a gold target. T012900100013 MONITOR (29-CU-0(A,X)30-ZN-65,CUM,SIG) integrated beam T012900100014 current determined using natural copper foils T012900100015 (7 mg/cm**2 thick). T012900100016 MONIT-REF (,,T,RUDDY,1968) T012900100017 DECAY-MON (30-ZN-65,245.D,DG,1115.) Data were taken from M.N. T012900100018 Namboodiri et al., Phys.Rev., C7, 1222 (1973). T012900100019 ERR-ANALYS (DATA-ERR) Error bars are given only in the graphical T012900100020 display of the excitation functions. From these a T012900100021 rough estimate of about 20% can be made. No T012900100022 information is given on contributions to these T012900100023 uncertainties. T012900100024 REL-REF (O,C1797001,M.N.Namboodiri+,J,PR/C,7,1222,1973) T012900100025 (R,B0088001,S.Y.Lin+,J,PR/C,16,688,1977). Monitor T012900100026 values from the thesis of Ruddy are tabulated. No T012900100027 errors or experimental details are quoted. T012900100028 ADD-RES (TRCS) Total reaction cross sections for 237Np with T012900100029 alpha particles are tabulated for energies between T012900100030 19.5 and 22.9 MeV. T012900100031 HISTORY (20001121C) Converted from data set B0089; T012900100032 updated at NNDC. Originally compiled by KaChaPaG and T012900100033 updated by CaJaD. T012900100034 (20170403A) BP: Added related reference, changed T012900100035 subentry 5 to Relative data from FCT in mb and updated T012900100036 reaction string SF8. T012900100037 ENDBIB 35 0 T012900100038 NOCOMMON 0 0 T012900100039 ENDSUBENT 38 0 T012900199999 SUBENT T0129002 20170403 C166T012900200001 BIB 6 12 T012900200002 REACTION (93-NP-237(A,N)95-AM-240,,SIG) T012900200003 SAMPLE Np electroplated onto nickel backing. Target stacks T012900200004 interspersed between nickel catcher and degrader T012900200005 foils. Thicknesses of Np layers were determined by T012900200006 counting 237Np alpha particles. T012900200007 METHOD (ACTIV,CHSEP,EDEG) Energy degradation in the stack T012900200008 was calculated according to L.C. Northcliffe et al., T012900200009 Nucl.Data, A7, 233 (1970) chemical yield was T012900200010 determined by use of 241Am spike. T012900200011 DETECTOR (GELI) T012900200012 DECAY-DATA (95-AM-240,51.HR,DG,1000.,0.77) T012900200013 STATUS (TABLE) Table II, page 1233. T012900200014 ENDBIB 12 0 T012900200015 NOCOMMON 0 0 T012900200016 DATA 2 23 T012900200017 EN DATA T012900200018 MEV MB T012900200019 19.5 0.372 T012900200020 20.0 0.517 T012900200021 20.1 0.514 T012900200022 20.8 0.823 T012900200023 21.6 1.28 T012900200024 22.3 1.48 T012900200025 22.9 1.96 T012900200026 25.0 2.32 T012900200027 26.3 2.43 T012900200028 27.6 2.73 T012900200029 28.7 2.53 T012900200030 29.2 2.34 T012900200031 30.3 2.72 T012900200032 31.3 2.91 T012900200033 32.1 2.50 T012900200034 33.7 2.45 T012900200035 34.6 1.95 T012900200036 36.5 1.64 T012900200037 37.6 1.27 T012900200038 40.0 1.33 T012900200039 41.1 1.79 T012900200040 43.5 1.17 T012900200041 45.9 1.06 T012900200042 ENDDATA 25 0 T012900200043 ENDSUBENT 42 0 T012900299999 SUBENT T0129003 20170403 C166T012900300001 BIB 6 13 T012900300002 REACTION (93-NP-237(A,2N)95-AM-239,,SIG) T012900300003 SAMPLE Np electroplated onto nickel backing. Target stacks T012900300004 interspersed between nickel catcher and degrader T012900300005 foils. Thicknesses of Np layers were determined by T012900300006 counting 237Np alpha particles. T012900300007 METHOD (ACTIV,CHSEP,EDEG) Energy degradation in the stack T012900300008 was calculated according to L.C. Northcliffe et al., T012900300009 Nucl.Data, A7, 233 (1970) chemical yield was T012900300010 determined by use of 241Am spike. T012900300011 DETECTOR (GELI) T012900300012 DECAY-DATA (95-AM-239,12.1HR,DG,226.4/228.2,0.146, T012900300013 DG,277.6,0.150) T012900300014 STATUS (TABLE) Table II, page 1233. T012900300015 ENDBIB 13 0 T012900300016 NOCOMMON 0 0 T012900300017 DATA 2 25 T012900300018 EN DATA T012900300019 MEV MB T012900300020 19.5 0.097 T012900300021 20.0 0.278 T012900300022 20.8 0.837 T012900300023 21.6 1.43 T012900300024 22.3 3.26 T012900300025 22.9 6.43 T012900300026 25.0 17.2 T012900300027 26.3 18.1 T012900300028 27.2 24.0 T012900300029 27.6 27.5 T012900300030 27.9 26.6 T012900300031 28.5 19.8 T012900300032 28.7 26.5 T012900300033 29.2 14.7 T012900300034 30.3 14.0 T012900300035 31.3 11.3 T012900300036 32.1 12.2 T012900300037 33.7 8.2 T012900300038 34.6 6.3 T012900300039 36.5 6.16 T012900300040 37.6 5.97 T012900300041 40.0 6.59 T012900300042 41.1 6.24 T012900300043 43.5 4.82 T012900300044 45.9 5.04 T012900300045 ENDDATA 27 0 T012900300046 ENDSUBENT 45 0 T012900399999 SUBENT T0129004 20170403 C166T012900400001 BIB 6 12 T012900400002 REACTION (93-NP-237(A,3N)95-AM-238,,SIG) T012900400003 SAMPLE Np electroplated onto nickel backing. Target stacks T012900400004 interspersed between nickel catcher and degrader T012900400005 foils. Thicknesses of Np layers were determined by T012900400006 counting 237Np alpha particles. T012900400007 METHOD (ACTIV,CHSEP,EDEG) Energy degradation in the stack T012900400008 was calculated according to L.C. Northcliffe et al., T012900400009 Nucl.Data, A7, 233 (1970) chemical yield was T012900400010 determined by use of 241Am spike. T012900400011 DETECTOR (GELI) T012900400012 DECAY-DATA (95-AM-238,1.63HR,DG,928.,0.34,DG,980.,0.42) T012900400013 STATUS (TABLE) Table II, page 1233. T012900400014 ENDBIB 12 0 T012900400015 NOCOMMON 0 0 T012900400016 DATA 2 17 T012900400017 EN DATA T012900400018 MEV MB T012900400019 29.2 0.245 T012900400020 30.3 1.25 T012900400021 31.0 0.895 T012900400022 31.3 2.08 T012900400023 32.1 1.23 T012900400024 32.1 1.62 T012900400025 33.1 2.26 T012900400026 33.7 4.25 T012900400027 34.6 3.98 T012900400028 36.5 4.41 T012900400029 37.6 4.88 T012900400030 39.2 5.37 T012900400031 40.0 2.74 T012900400032 40.4 3.31 T012900400033 41.1 3.07 T012900400034 43.5 2.13 T012900400035 45.9 1.83 T012900400036 ENDDATA 19 0 T012900400037 ENDSUBENT 36 0 T012900499999 SUBENT T0129005 20170403 C166T012900500001 BIB 7 18 T012900500002 REACTION (93-NP-237(A,4N)95-AM-237,,SIG,,REL) Arbitrary value T012900500003 of 1 was chosen as abundance of the 280.3 keV gamma T012900500004 radiation. T012900500005 SAMPLE Np electroplated onto nickel backing. Target stacks T012900500006 interspersed between nickel catcher and degrader T012900500007 foils. Thicknesses of Np layers were determined by T012900500008 counting 237Np alpha particles. T012900500009 METHOD (ACTIV,CHSEP,EDEG) Energy degradation in the stack T012900500010 was calculated according to L.C. Northcliffe et al., T012900500011 Nucl.Data, A7, 233 (1970) chemical yield was T012900500012 determined by use of 241Am spike. T012900500013 DETECTOR (GELI) T012900500014 DECAY-DATA (95-AM-237,1.3HR,DG,280.3,1.) T012900500015 ** Comment by CaJaD compiler ** according ENSDF, T012900500016 280 keV abundance is 0.47. T012900500017 STATUS (TABLE) Table II, page 1233. T012900500018 HISTORY (20170403A) BP: Changed to Relative data from FCT in mbT012900500019 and updated reaction string SF8. T012900500020 ENDBIB 18 0 T012900500021 NOCOMMON 0 0 T012900500022 DATA 2 5 T012900500023 EN DATA T012900500024 MEV ARB-UNITS T012900500025 39.2 0.072 T012900500026 40.4 0.148 T012900500027 41.1 0.269 T012900500028 43.5 0.481 T012900500029 45.9 0.496 T012900500030 ENDDATA 7 0 T012900500031 ENDSUBENT 30 0 T012900599999 SUBENT T0129006 20170403 C166T012900600001 BIB 6 9 T012900600002 REACTION (93-NP-237(A,F),,SIG) T012900600003 SAMPLE Neptunium oxide targets (about 100 microg/cm2) T012900600004 prepared by vacuum deposition onto Al backing foils. T012900600005 Effective Np thickness about 0.056 mg/cm2. T012900600006 METHOD (REC) T012900600007 DETECTOR (TRD) Mica placed at 175 degrees to the beam. T012900600008 CORRECTION Correction of 25% applied at all energies for T012900600009 anisotropy in angular distribution of fission products.T012900600010 STATUS (TABLE) Table II, page 1233. T012900600011 ENDBIB 9 0 T012900600012 NOCOMMON 0 0 T012900600013 DATA 2 7 T012900600014 EN DATA T012900600015 MEV MB T012900600016 19.5 0.466 T012900600017 19.8 2.02 T012900600018 20.8 24.0 T012900600019 22.0 66.4 T012900600020 22.3 101. T012900600021 22.7 133. T012900600022 22.9 200. T012900600023 ENDDATA 9 0 T012900600024 ENDSUBENT 23 0 T012900699999 SUBENT T0129007 20170403 C166T012900700001 BIB 9 41 T012900700002 REACTION 1(93-NP-237(A,2N)95-AM-239-L,,SIG) Fission isomer cross T012900700003 section. T012900700004 R((93-NP-237(A,3N)95-AM-238-L,,SIG)/ T012900700005 (93-NP-237(A,2N)95-AM-239-L,,SIG)) Fission isomers T012900700006 cross sections ratio. T012900700007 SAMPLE Neptunium oxide targets (about 100 microg/cm2) T012900700008 prepared by vacuum deposition onto Al backing foils. T012900700009 Effective Np thickness about 0.056 mg/cm2. T012900700010 DECAY-DATA (95-AM-239-L,200.NSEC,SF) Fission isomer. T012900700011 R(95-AM-238-L,35.MICROSEC,SF) Fission isomer. T012900700012 METHOD (REC) T012900700013 RStacked detector technique. Ratios were T012900700014 measured using a detector stack of two different T012900700015 thickness due to the fact that detection efficiency T012900700016 varies with the minimum dip angle of the impinging T012900700017 fission fragments. This minimum dip angle which T012900700018 increases with detector thickness depends on the T012900700019 time-of-flight and thus on the half-life of the T012900700020 recoiling fission isomers. This difference in T012900700021 detection efficiency of the two foils allows the T012900700022 determination of the cross section ratio. T012900700023 DETECTOR (TRD) T012900700024 1Plastic sheet (makrofol, 0.72 mg/cm2) mounted T012900700025 perpendicular to the beam very nearly in the same T012900700026 plane as the target layer. T012900700027 RStack of two makrofol detectors of different T012900700028 thicknesses. T012900700029 ADD-RES (DECAY) 239(m)Am half-life of 200+-80 nsec was T012900700030 determined from the radial distributions of tracks in T012900700031 the track detector sheet. T012900700032 FLAG (1.) Probably contributions from other fission T012900700033 isomers such as 237(m1/m2)Pu. T012900700034 (2.) Probably contributions from other fission T012900700035 isomers such as 237(m1/m2)Pu. A limit of <0.03 microb T012900700036 was calculated for the formation cross section of 5 T012900700037 nsec 237Am, which corresponds to about the maximum of T012900700038 the excitation function. T012900700039 STATUS (TABLE) Table III, page 1234. T012900700040 HISTORY (20170403A) BP: Changed reaction coding by removing an T012900700041 M symbol that is reserved for regular, not fission T012900700042 isomers. T012900700043 ENDBIB 41 0 T012900700044 NOCOMMON 0 0 T012900700045 DATA 5 25 T012900700046 EN DATA 1DATA-MAX 1DATA RFLAG T012900700047 MEV NB NB NO-DIM NO-DIM T012900700048 21.24 16. T012900700049 21.44 73. T012900700050 22.18 379. T012900700051 22.74 482. T012900700052 23.30 823. T012900700053 24.38 870. T012900700054 24.48 802. T012900700055 26.31 974. T012900700056 28.12 502. T012900700057 29.81 598. 0.18 T012900700058 31.83 299. 1.06 T012900700059 33.61 183. 2.92 T012900700060 33.71 238. 1.36 T012900700061 34.44 171. 4.56 T012900700062 35.25 181. 3.77 T012900700063 35.44 121. T012900700064 36.34 93. T012900700065 37.17 177. 4.22 1. T012900700066 37.24 359. 1. T012900700067 38.01 391. 2.23 1. T012900700068 40.96 246. 0.080 1. T012900700069 42.75 385. 0.086 1. T012900700070 42.75 334. 1. T012900700071 44.43 354. 1. T012900700072 44.89 304. 0.24 2. T012900700073 ENDDATA 27 0 T012900700074 ENDSUBENT 73 0 T012900799999 ENDENTRY 7 0 T012999999999