ENTRY A0585 20030915 0000A058500000001 SUBENT A0585001 20030915 0000A058500100001 BIB 10 40 A058500100002 TITLE Backscattering of 6-Li and 7-Li ions from oxygen below A058500100003 6 MeV A058500100004 AUTHOR (M.Mayer, B.Diaz-Herrera, M.Schneider) A058500100005 INSTITUTE (2GERGAR) A058500100006 REFERENCE (J,NIM/B,207,263,2003) A058500100007 SAMPLE The sample consisted of a carbon substrate made of A058500100008 pyrolytic graphite, and was covered with layers of A058500100009 Al/2-O/3 (174.6 nanometers) and Au (10.0 nanometers) onA058500100010 top. The Al/2-O/3 layer was deposited by filtered A058500100011 vacuum arc from a pure aluminium cathode in oxygen A058500100012 atmosphere. The gold film was deposited by electron A058500100013 beam evaporation and was used as an internal dose A058500100014 reference. The thicknesses of the layers were A058500100015 determined by 4He ion backscattering at 2023 KeV A058500100016 incident energy. The atomic ratio of oxygen to A058500100017 aluminium was determined to be 3:2 with an accuracy ofA058500100018 2%. A pure carbon sample was used to examine the A058500100019 background due to nuclear reactions of incident Li ionsA058500100020 with the carbon substrate. A058500100021 DETECTOR (SOLST) PIPS Detectors A058500100022 FACILITY (VDGT,2GERGAR) The terminal voltage of the acceleratorA058500100023 was calibrated with the well-known resonances of A058500100024 the 27Al(p,g)28Si reaction at 992 and 1380 KeV. The A058500100025 energy spread of the beam is below 1 KeV for protons atA058500100026 1000 KeV and is assumed to be of the same order for Li A058500100027 ions, which are produced with the same source. A058500100028 METHOD (EXTB) A058500100029 (SITA) A058500100030 HISTORY (20030915C) A058500100031 (20030915U) Last checking has been done. A058500100032 ERR-ANALYS (ERR-T)The error in the determination of the cross A058500100033 section on oxygen is due to the uncertainty in the A058500100034 determination of the ratio of the areal densities of AuA058500100035 and O, and additionally due to count statistics of the A058500100036 oxygen peak and the background due to nuclear reactionsA058500100037 with the carbon substrate. A058500100038 (ERR-1) The uncertainty of the ratio of the arial A058500100039 densities of Au and O. A058500100040 (ERR-2) Maximal value of statistical error of the Au A058500100041 peak. A058500100042 ENDBIB 40 0 A058500100043 COMMON 3 3 A058500100044 ERR-1 ERR-2 ANG A058500100045 PER-CENT PER-CENT ADEG A058500100046 3. 0.5 165. A058500100047 ENDCOMMON 3 0 A058500100048 ENDSUBENT 47 0 A058500199999 SUBENT A0585002 20030915 0000A058500200001 BIB 2 2 A058500200002 REACTION (8-O-16(3-LI-6,EL)8-O-16,,DA,,RTH) A058500200003 MONITOR (79-AU-197(3-LI-6,EL)79-AU-197,,DA) A058500200004 ENDBIB 2 0 A058500200005 NOCOMMON 0 0 A058500200006 DATA 3 26 A058500200007 EN DATA ERR-T A058500200008 KEV NO-DIM PER-CENT A058500200009 1585. 1.02 4.6 A058500200010 1785. 0.97 4.7 A058500200011 1984. 0.99 4.7 A058500200012 2084. 1.05 4.7 A058500200013 2184. 0.97 4.8 A058500200014 2284. 1. 4.9 A058500200015 2384. 1.05 4.8 A058500200016 2485. 1.03 5. A058500200017 2685. 0.98 5.1 A058500200018 2786. 1.07 5.1 A058500200019 2886. 1.03 5.2 A058500200020 2987. 1. 5.2 A058500200021 3087. 0.96 5.3 A058500200022 3188. 1. 5.4 A058500200023 3288. 0.98 5.5 A058500200024 3339. 1.02 5.4 A058500200025 3389. 1.07 5.4 A058500200026 3439. 0.99 5.5 A058500200027 3590. 0.96 5.7 A058500200028 3790. 0.95 5.9 A058500200029 3991. 0.9 6.2 A058500200030 4191. 0.82 6.6 A058500200031 4391. 0.8 7. A058500200032 4592. 0.72 7.7 A058500200033 4692. 0.69 8. A058500200034 4992. 0.51 10.6 A058500200035 ENDDATA 28 0 A058500200036 ENDSUBENT 35 0 A058500299999 SUBENT A0585003 20030915 0000A058500300001 BIB 3 12 A058500300002 REACTION (8-O-16(3-LI-7,EL)8-O-16,,DA,,RTH) A058500300003 MONITOR (79-AU-197(3-LI-7,EL)79-AU-197,,DA) A058500300004 REL-REF (A,O0869001,E.RAUHALA+,J,NIM/B,35,7,1988) A058500300005 For 7Li, there is good agreement with the data of A058500300006 rauhala and raisanen at energies below 5200 KeV. At A058500300007 higher energies, however, there is a disagreement by a A058500300008 factor of almost two, which is much larger than the A058500300009 error bars of the measurements. The reason for this A058500300010 disagreement is not known. The measurements were A058500300011 performed at slightly different scattering angles (165 A058500300012 versus 170), but it seems unlikely that this small A058500300013 difference is able to explain this disagreement. A058500300014 ENDBIB 12 0 A058500300015 NOCOMMON 0 0 A058500300016 DATA 3 19 A058500300017 EN DATA ERR-T A058500300018 KEV NO-DIM PER-CENT A058500300019 2475. 1. 3.3 A058500300020 2575. 1.01 3.7 A058500300021 2776. 1.02 3.7 A058500300022 2977. 1.02 3.5 A058500300023 3177. 1.06 3.9 A058500300024 3379. 1.04 3.6 A058500300025 3580. 1.04 4.2 A058500300026 3781. 1. 4.3 A058500300027 3982. 0.96 4.7 A058500300028 4183. 0.94 4.9 A058500300029 4484. 0.92 5.4 A058500300030 4584. 0.89 5.8 A058500300031 4785. 0.87 6.1 A058500300032 4985. 0.85 5.4 A058500300033 5186. 0.78 5.3 A058500300034 5386. 0.72 5.3 A058500300035 5584. 0.58 5.9 A058500300036 5786. 0.48 6.2 A058500300037 5987. 0.43 5.7 A058500300038 ENDDATA 21 0 A058500300039 ENDSUBENT 38 0 A058500399999 ENDENTRY 3 0 A058599999999