ENTRY O0748 20050217 O023O074800000001 SUBENT O0748001 20050217 O023O074800100001 BIB 14 54 O074800100002 TITLE Activation cross sections for proton-induced reactions O074800100003 on calcium isotopes up to 5.6-MeV. O074800100004 AUTHOR (Tielman J.De Waal, Max Peisach, Rene Pretorius) O074800100005 INSTITUTE (3SAFSUN) O074800100006 REFERENCE (J,JIN,33,2783,1971) O074800100007 HISTORY (20050203C) O074800100008 (20050217U) Last checking has been done. O074800100009 SAMPLE Enriched isotopes of calcium were obtained. O074800100010 The targets of calcium fluoride in which the calcium O074800100011 was either of natural isotopic composition or enriched O074800100012 in a particular isotope were prepared by distilling theO074800100013 heated material in vacuum onto tantalum discs, 0.25-mm O074800100014 thick. The thickness of each target was determined by O074800100015 weighing. The uniformity of the target was determined O074800100016 by autoradiography. O074800100017 DETECTOR (GELI) A 20-cm**3 Ge(Li)-detector. O074800100018 (NAICR) The detectors were shielded from beta-particlesO074800100019 and bremsstrahlung radiation. O074800100020 FACILITY (VDG,3SAFSUN) O074800100021 METHOD (SITA) Up to 12 sample discs could be mounted on a O074800100022 rotating sample holder, which rotated at about 100 O074800100023 rev/minute. O074800100024 (EDEG) Aluminium foils of different thicknesses were O074800100025 placed in front of each target thereby enabling data O074800100026 to be obtained simultaneously at 12 different proton O074800100027 energies. The results were useful to obtain cross O074800100028 section values. O074800100029 (EXTB) Proton beams of between 1 and 10 microampreres. O074800100030 (ACTIV) Irradiation and cooling times are not given. O074800100031 (BCINT) Accurate flux measyrements were obtained when O074800100032 single targets were irradiated in a Faraday cup at O074800100033 different bombarding energies. O074800100034 COMMENT -By authors. Sets of relative cross sections obtainedO074800100035 from the multiple irradiations were normalized to all O074800100036 the absolute values obtained from the single O074800100037 irradiations. O074800100038 ANALYSIS (AREA,DECAY) O074800100039 ERR-ANALYS (ERR-T) Each error value listed in the table is the O074800100040 root mean square error calculated from all the relevantO074800100041 experimental conditions pertaining to the measurement. O074800100042 The errors includes: O074800100043 (ERR-1) The relative accuracy of the absolute O074800100044 calibration of the spectrometer. O074800100045 (ERR-2) The error in determining of average thickness. O074800100046 (ERR-3) The thickness variations. O074800100047 Statistical uncertainties of the number of events O074800100048 counted and the relative importance of the subtracted O074800100049 background. O074800100050 (EN-ERR). The uncertainty in the energy of the proton O074800100051 beam. For targets of 200-mug/cm**2 the energy spread O074800100052 within the target would be +-11-KeV at 2-MeV and O074800100053 +-5-KeV at 5.5-MeV, which is negligible. O074800100054 STATUS (TABLE) O074800100055 ADD-RES (COMP) Theory for compound nucleus formation. O074800100056 ENDBIB 54 0 O074800100057 COMMON 4 3 O074800100058 EN-ERR ERR-1 ERR-2 ERR-3 O074800100059 KEV PER-CENT PER-CENT PER-CENT O074800100060 2. 3. 1. 3. O074800100061 ENDCOMMON 3 0 O074800100062 ENDSUBENT 61 0 O074800199999 SUBENT O0748002 20050217 O023O074800200001 BIB 4 6 O074800200002 REACTION (20-CA-43(P,N)21-SC-43,,SIG) O074800200003 RAD-DET (21-SC-43,AR) O074800200004 DECAY-DATA (21-SC-43,3.92HR,AR) O074800200005 SAMPLE Ca-43 fluoride. O074800200006 Isotopic composition: Ca-43-81.12%, Ca-44-0.05%, O074800200007 Ca-48-0.07% was used as target. O074800200008 ENDBIB 6 0 O074800200009 NOCOMMON 0 0 O074800200010 DATA 3 10 O074800200011 EN DATA ERR-T O074800200012 MEV MB MB O074800200013 5.574 243.6 24. O074800200014 5.474 198.8 19.9 O074800200015 5.183 227.3 22.9 O074800200016 5. 130.2 13.1 O074800200017 4.792 131.3 13.4 O074800200018 4.57 73.9 10.1 O074800200019 4.34 52.6 6. O074800200020 3.87 30.3 4. O074800200021 3.61 26. 3.8 O074800200022 3.35 14.3 2.9 O074800200023 ENDDATA 12 0 O074800200024 ENDSUBENT 23 0 O074800299999 SUBENT O0748003 20050217 O023O074800300001 BIB 4 6 O074800300002 REACTION (20-CA-44(P,N)21-SC-44-G,,SIG) O074800300003 RAD-DET (21-SC-44-G,DG) O074800300004 DECAY-DATA (21-SC-44-G,3.92HR,DG,1156.,1.,DG,1506.,0.008) O074800300005 SAMPLE Ca-44 fluoride. O074800300006 Isotopic composition: Ca-44-98.56%, Ca-43-5.40%, O074800300007 Ca-48-2.02%, was used as target. O074800300008 ENDBIB 6 0 O074800300009 NOCOMMON 0 0 O074800300010 DATA 3 8 O074800300011 EN DATA ERR-T O074800300012 MEV MB MB O074800300013 5.574 81.9 7.1 O074800300014 5.474 75.6 6.9 O074800300015 5.394 67.8 6. O074800300016 5.183 45.7 3.6 O074800300017 5. 28.3 2.1 O074800300018 4.993 34.7 2.9 O074800300019 4.792 26. 2.1 O074800300020 4.57 6.1 0.7 O074800300021 ENDDATA 10 0 O074800300022 ENDSUBENT 21 0 O074800399999 SUBENT O0748004 20050217 O023O074800400001 BIB 4 7 O074800400002 REACTION (20-CA-48(P,N)21-SC-48,,SIG) O074800400003 RAD-DET (21-SC-48,DG) O074800400004 DECAY-DATA (21-SC-48,1.83D,DG,178.,0.06,DG,983.,1.,DG,1040.,1., O074800400005 DG,1312.,1.) O074800400006 SAMPLE Ca-48 fluoride. O074800400007 Isotopic composition: Ca-48-81.90%, Ca-43-0.05%, O074800400008 Ca-44-0.01%, was used as target. O074800400009 ENDBIB 7 0 O074800400010 NOCOMMON 0 0 O074800400011 DATA 3 20 O074800400012 EN DATA ERR-T O074800400013 MEV MB MB O074800400014 5.474 254.1 18.2 O074800400015 5.284 255.1 18.1 O074800400016 5.083 214.5 14.8 O074800400017 4.973 173.3 20.1 O074800400018 4.883 196.1 15.1 O074800400019 4.672 178.8 12.6 O074800400020 4.47 159.9 11.9 O074800400021 4.239 158.2 11.8 O074800400022 4.209 143.5 10.5 O074800400023 4.008 123.5 9.8 O074800400024 3.755 91.9 7.6 O074800400025 3.504 78.7 6. O074800400026 3.464 71.1 4.9 O074800400027 3.222 48.4 3.5 O074800400028 2.888 30.8 2.2 O074800400029 2.615 18.6 1.7 O074800400030 2.575 15.7 1.2 O074800400031 2.23 6.8 0.5 O074800400032 1.895 5.1 0.6 O074800400033 1.864 3.4 0.4 O074800400034 ENDDATA 22 0 O074800400035 ENDSUBENT 34 0 O074800499999 ENDENTRY 4 0 O074899999999