ENTRY C0199 20220530 C213C019900000001 SUBENT C0199001 20220530 C213C019900100001 BIB 9 36 C019900100002 INSTITUTE (1USAHRV,1USAPEN) C019900100003 (1USAUSA) American Science and Engineering Inc., C019900100004 Cambridge, MA. C019900100005 REFERENCE (J,NIM/B,29,271,1987) C019900100006 #doi:10.1016/0168-583X(87)90248-5 C019900100007 AUTHOR (R.J.Schneider,J.M.Sisterson,A.M.Koehler,J.Klein, C019900100008 R.Middleton) C019900100009 TITLE Measurement of cross sections for Aluminium-26 and C019900100010 Sodium-24 induced by protons in Aluminium. C019900100011 FACILITY (SYNCY,1USAHRV) 160-MeV synchrocyclotron. C019900100012 INC-SOURCE External diameter 160-MeV proton beam 11.1 mm. C019900100013 Proton fluences measured using a transmission ion C019900100014 chamber and Faraday cup calibrations were made at C019900100015 several energies. C019900100016 SAMPLE High purity (99.999%) aluminium disks, machined to C019900100017 12.7 mm in diameter. C019900100018 In order to keep the energy loss in the target less C019900100019 than 2 MeV, two different thicknesses used. C019900100020 Target parameters and proton numbers for each energy C019900100021 are the following: C019900100022 Incident Energy Target Target Total number C019900100023 proton energy loss thickness weight of protons C019900100024 (MeV) (MeV) (mm) (g) (x10**12) C019900100025 40.0 1.5 0.5 0.173 2.45 C019900100026 50.0 1.3 0.5 0.174 4.84 C019900100027 60.0 1.1 0.5 0.172 4.74 C019900100028 70.0 1.0 0.5 0.173 4.84 C019900100029 90.0 1.8 1.0 0.355 4.81 C019900100030 120.0 1.4 1.0 0.354 4.82 C019900100031 140.0 1.2 1.0 0.354 4.84 C019900100032 159.0 1.2 1.0 0.356 4.84 C019900100033 STATUS (APRVD) Approved by J. Sisterson, March 8, 1999. C019900100034 HISTORY (19990128C) C019900100035 (20210725A) OS. REACTION corrected insubs.2,3, updated C019900100036 INSTITUTE, STATUS, ERR-ANALYS C019900100037 (20220502A) OS. Corrections in sub.3 C019900100038 ENDBIB 36 0 C019900100039 NOCOMMON 0 0 C019900100040 ENDSUBENT 39 0 C019900199999 SUBENT C0199002 20210828 C203C019900200001 BIB 7 15 C019900200002 REACTION (13-AL-27(P,X)11-NA-24,,SIG) C019900200003 METHOD (ACTIV) 3 counts made in 15 hrs. following irradiation.C019900200004 Total detection efficiency determined using calibrated C019900200005 88Y, 60Co and 133Ba sources. Efficiency 3.42x10**(-3) C019900200006 for 1.369 MeV gamma ray. C019900200007 DECAY-DATA (11-NA-24,15.03HR,DG,1369.,,DG,2754.) C019900200008 DETECTOR (GELI) C019900200009 ERR-ANALYS (DATA-ERR) Errors quoted are upper limits; the C019900200010 detector efficiency, which depends on calibrated C019900200011 sources with 5% uncertainties is one of the major C019900200012 factors. C019900200013 (ERR-S,,1.)Statistical errors in the mean are generallyC019900200014 less than 1 %. C019900200015 STATUS (TABLE) Table 2, Nucl.Instr.Meth.B29,271,1987 C019900200016 HISTORY (20210725A) REACTION SF3 changed to X C019900200017 ENDBIB 15 0 C019900200018 NOCOMMON 0 0 C019900200019 DATA 4 8 C019900200020 EN EN-RSL-FW DATA DATA-ERR C019900200021 MEV MEV MB PER-CENT C019900200022 40. 10. 1.82 8. C019900200023 50. 8. 6.20 7. C019900200024 60. 6. 10.0 7. C019900200025 70. 6. 11.0 6. C019900200026 90. 4. 11.2 6. C019900200027 120. 4. 10.3 6. C019900200028 140. 2. 10.9 7. C019900200029 159. 2. 10.4 8. C019900200030 ENDDATA 10 0 C019900200031 ENDSUBENT 30 0 C019900299999 SUBENT C0199003 20220530 C213C019900300001 BIB 7 34 C019900300002 REACTION (13-AL-27(P,X)13-AL-26-G,,SIG) C019900300003 METHOD (AMS) After the aluminium targets were counted for C019900300004 24Na, they were analyzed for 26Al at the University C019900300005 of Pennsylvania's Tandem Accelerator Laboratory mass C019900300006 analysis facility. C019900300007 Measurements were made by producing Al-negative C019900300008 ions, accelerating them through 36 keV and mass C019900300009 analyzing them through 90-deg before injection into C019900300010 the tandem accelerator operated at 7.5 MeV. Al27+ C019900300011 ions at 60 MeV were analyzed in a velocity selector, C019900300012 then a 90-deg bending magnet followed by another C019900300013 45-deg magnet before detection. C019900300014 (CHSEP) Targets were completely dissolved with HCl, C019900300015 precipitated with NH4OH, and converted to Al2O3 by C019900300016 baking in an 800-deg C oven for several hours. C019900300017 About 2 mg of the Al2O3 from each target was pressed C019900300018 into a copper cathode and loaded into a cesium- C019900300019 sputter ion source. C019900300020 (ACTIV) C019900300021 DETECTOR (SOLST) Combination gas (DE) - Si surface-barrier C019900300022 (E) detector. C019900300023 MONITOR Isotopic ratios normalized by comparison to standard C019900300024 sample having a ratio of 9.86x10**(-12), made from C019900300025 NBS-standard 4229-24, and based on 26Al half-life of C019900300026 7.03 x 10**5 yr. Normalization factor 1.1 . C019900300027 ERR-ANALYS (ERR-S) Random errors given. C019900300028 (ERR-SYS) Additional systematic uncertainty (5.7%) due C019900300029 to C019900300030 (ERR-1) uncertainty in normalization (3%) and C019900300031 (ERR-2) uncertainbty in 26Al half-life (5%). C019900300032 STATUS (TABLE) Table 3, Nucl.Instr.Meth.B29,271,1987 C019900300033 HISTORY (20210725A) REACTION SF3 changed to X C019900300034 (20220502A) Added -G to REACTION SF4, METHOD and C019900300035 ERR-ANALYS updated C019900300036 ENDBIB 34 0 C019900300037 COMMON 3 3 C019900300038 ERR-SYS ERR-1 ERR-2 C019900300039 PER-CENT PER-CENT PER-CENT C019900300040 5.7 3. 5. C019900300041 ENDCOMMON 3 0 C019900300042 DATA 4 5 C019900300043 EN EN-RSL-FW DATA ERR-S C019900300044 MEV MEV MB PER-CENT C019900300045 50. 8. 74.0 8. C019900300046 60. 6. 66.4 10. C019900300047 90. 4. 59.3 11. C019900300048 120. 4. 50.0 9. C019900300049 159. 2. 43.9 9. C019900300050 ENDDATA 7 0 C019900300051 ENDSUBENT 50 0 C019900399999 ENDENTRY 3 0 C019999999999