ENTRY A0521 20030619 0000A052100000001 SUBENT A0521001 20030619 0000A052100100001 BIB 10 33 A052100100002 TITLE Backscattering of 6-Li and 7-Li ions from oxygen below A052100100003 6 MeV A052100100004 AUTHOR (M.Mayer, B.Diaz-Herrera, M.Schneider) A052100100005 INSTITUTE (2GERGAR) A052100100006 REFERENCE (J,NIM/B,207,263,2003) A052100100007 (W,MAYER,20030618) A052100100008 SAMPLE The sample consisted of a carbon substrate made of A052100100009 pyrolytic graphite, and was covered with layers of A052100100010 Al/2-O/3 (174.6 nm) and Au (10.0 nm) on top. The goldA052100100011 film was deposited by electron beam evaporation and wasA052100100012 used as an internal dose reference. The thicknesses ofA052100100013 the layers were determined by 4-He ion backscattering A052100100014 at 2023 KeV incident energy. The atomic ratio of A052100100015 oxygen to aluminium was determined to be 3:2 with an A052100100016 accuracy of 2%. A052100100017 DETECTOR (SOLST) PIPS detector A052100100018 FACILITY (VDGT,2GERGAR) 3 MV tandem A052100100019 METHOD (EXTB) Measurements were made with Li+ below 5 MeV andA052100100020 with Li++ above 5 MeV. The energy spread of the beam A052100100021 is below 1 KeV for protons at 1000 KeV and is assumed A052100100022 to be of the same order for Li ions, which are producedA052100100023 with the same source. About 10-20 microcoulomb total A052100100024 charge were collected for each data point at energies A052100100025 below 5 MeV, and between 60 and 240 microcoulomb in theA052100100026 5-6 MeV range to improve the statistics of the A052100100027 measurements. A052100100028 (SITA,MOMIX) See SAMPLE A052100100029 HISTORY (20030616C) A052100100030 (20030618R) Data tables for scattering of lithium by A052100100031 aluminium are received from M.Mayer A052100100032 (20030619U) Last checking has been done. A052100100033 STATUS (TABLE) In the paper and additional data tables from A052100100034 M.Mayer A052100100035 ENDBIB 33 0 A052100100036 COMMON 1 3 A052100100037 ANG A052100100038 ADEG A052100100039 165. A052100100040 ENDCOMMON 3 0 A052100100041 ENDSUBENT 40 0 A052100199999 SUBENT A0521002 20030619 0000A052100200001 BIB 4 13 A052100200002 REACTION (8-O-16(3-LI-6,EL)8-O-16,,DA,,RTH) A052100200003 MONITOR (79-AU-197(3-LI-6,EL)79-AU-197,,DA) The cross section A052100200004 is assumed as Rutherford cross section. A052100200005 CORRECTION For backscattering cross-section from gold the A052100200006 screening of the nuclear charge by the surrounding A052100200007 electrons has to be taken into account. A052100200008 ERR-ANALYS (ERR-T) The error in the determination of the cross A052100200009 section on oxygen is due to the uncertainty in the A052100200010 determination of the ratio of the areal densities gold A052100200011 and oxygen of about 3%, and additionally due to count A052100200012 statistics of the oxygen peak and the background due toA052100200013 nuclear reactions with the carbon substrate. The A052100200014 statistical error of the Au peak was always <0.5%. A052100200015 ENDBIB 13 0 A052100200016 NOCOMMON 0 0 A052100200017 DATA 3 26 A052100200018 EN DATA ERR-T A052100200019 KEV NO-DIM PER-CENT A052100200020 1585. 1.02 4.6 A052100200021 1785. 0.97 4.7 A052100200022 1984. 0.99 4.7 A052100200023 2084. 1.05 4.7 A052100200024 2184. 0.97 4.8 A052100200025 2284. 1. 4.9 A052100200026 2384. 1.05 4.8 A052100200027 2485. 1.03 5. A052100200028 2685. 0.98 5.1 A052100200029 2786. 1.07 5.1 A052100200030 2886. 1.03 5.2 A052100200031 2987. 1. 5.2 A052100200032 3087. 0.96 5.3 A052100200033 3188. 1. 5.4 A052100200034 3288. 0.98 5.5 A052100200035 3339. 1.02 5.4 A052100200036 3389. 1.07 5.4 A052100200037 3439. 0.99 5.5 A052100200038 3590. 0.96 5.7 A052100200039 3790. 0.95 5.9 A052100200040 3991. 0.9 6.2 A052100200041 4191. 0.82 6.6 A052100200042 4391. 0.8 7. A052100200043 4592. 0.72 7.7 A052100200044 4692. 0.69 8. A052100200045 4992. 0.51 10.6 A052100200046 ENDDATA 28 0 A052100200047 ENDSUBENT 46 0 A052100299999 SUBENT A0521003 20030619 0000A052100300001 BIB 5 24 A052100300002 REACTION (8-O-16(3-LI-7,EL)8-O-16,,DA,,RTH) A052100300003 MONITOR (79-AU-197(3-LI-7,EL)79-AU-197,,DA) The cross section A052100300004 is assumed as Rutherford cross section. A052100300005 CORRECTION For backscattering cross-section from gold the A052100300006 screening of the nuclear charge by the surrounding A052100300007 electrons has to be taken into account. A052100300008 REL-REF (A,O0869001,E.RAUHALA+,J,NIM/B,35,7,1988) A052100300009 For 7-Li, there is good agreement with the data of A052100300010 rauhala and raisanen (see REL-REF ) at energies below A052100300011 5200 KeV. At higher energies, however, there is a A052100300012 disagreement by a factor of almost two, which is much A052100300013 larger than the error bars of the measurements. The A052100300014 reason for this disagreement is not known. The A052100300015 measurements were performed at slightly different A052100300016 scattering angles (165 versus 170), but it seems A052100300017 unlikely that this small difference is able to explain A052100300018 this disagreement. (Comment by authors) A052100300019 ERR-ANALYS (ERR-T) The error in the determination of the cross A052100300020 section on oxygen is due to the uncertainty in the A052100300021 determination of the ratio of the areal densities gold A052100300022 and oxygen of about 3%, and additionally due to count A052100300023 statistics of the oxygen peak and the background due toA052100300024 nuclear reactions with the carbon substrate. The A052100300025 statistical error of the Au peak was always <0.5%. A052100300026 ENDBIB 24 0 A052100300027 NOCOMMON 0 0 A052100300028 DATA 3 19 A052100300029 EN DATA ERR-T A052100300030 KEV NO-DIM PER-CENT A052100300031 2475. 1. 3.3 A052100300032 2575. 1.01 3.7 A052100300033 2776. 1.02 3.7 A052100300034 2977. 1.02 3.5 A052100300035 3177. 1.06 3.9 A052100300036 3379. 1.04 3.6 A052100300037 3580. 1.04 4.2 A052100300038 3781. 1. 4.3 A052100300039 3982. 0.96 4.7 A052100300040 4183. 0.94 4.9 A052100300041 4484. 0.92 5.4 A052100300042 4584. 0.89 5.8 A052100300043 4785. 0.87 6.1 A052100300044 4985. 0.85 5.4 A052100300045 5186. 0.78 5.3 A052100300046 5386. 0.72 5.3 A052100300047 5584. 0.58 5.9 A052100300048 5786. 0.48 6.2 A052100300049 5987. 0.43 5.7 A052100300050 ENDDATA 21 0 A052100300051 ENDSUBENT 50 0 A052100399999 SUBENT A0521004 20030619 0000A052100400001 BIB 4 13 A052100400002 REACTION (13-AL-27(3-LI-6,EL)13-AL-27,,DA,,RTH) A052100400003 MONITOR (79-AU-197(3-LI-6,EL)79-AU-197,,DA) The cross section A052100400004 is assumed as Rutherford cross section. A052100400005 CORRECTION For backscattering cross-section from gold the A052100400006 screening of the nuclear charge by the surrounding A052100400007 electrons has to be taken into account. A052100400008 ERR-ANALYS (ERR-T) The error in the determination of the cross A052100400009 section on aluminum is due to the uncertainty in the A052100400010 determination of the ratio of the areal densities gold A052100400011 and aluminum of about 3%, and additionally due to countA052100400012 statistics of the aluminum peak and the background due A052100400013 to nuclear reactions with the carbon substrate. The A052100400014 statistical error of the Au peak was always <0.5%. A052100400015 ENDBIB 13 0 A052100400016 NOCOMMON 0 0 A052100400017 DATA 3 28 A052100400018 EN DATA ERR-T A052100400019 KEV NO-DIM NO-DIM A052100400020 1585. 1.025 0.045 A052100400021 1785. 1.009 0.045 A052100400022 1984. 0.963 0.043 A052100400023 2084. 1.028 0.046 A052100400024 2184. 0.977 0.044 A052100400025 2284. 0.994 0.045 A052100400026 2384. 1.032 0.047 A052100400027 2485. 1.024 0.047 A052100400028 2685. 0.98 0.046 A052100400029 2786. 1.009 0.047 A052100400030 2886. 0.971 0.046 A052100400031 2987. 1. 0.047 A052100400032 3087. 1.013 0.048 A052100400033 3188. 0.951 0.045 A052100400034 3288. 0.994 0.048 A052100400035 3339. 0.993 0.048 A052100400036 3389. 1.021 0.05 A052100400037 3439. 1.018 0.05 A052100400038 3590. 0.989 0.049 A052100400039 3790. 1.018 0.051 A052100400040 3991. 0.99 0.051 A052100400041 4191. 0.968 0.05 A052100400042 4391. 0.956 0.05 A052100400043 4592. 1.002 0.054 A052100400044 4692. 1.022 0.056 A052100400045 4992. 0.979 0.055 A052100400046 5494. 0.991 0.061 A052100400047 5794. 1.02 0.082 A052100400048 ENDDATA 30 0 A052100400049 ENDSUBENT 48 0 A052100499999 SUBENT A0521005 20030619 0000A052100500001 BIB 4 13 A052100500002 REACTION (13-AL-27(3-LI-7,EL)13-AL-27,,DA,,RTH) A052100500003 MONITOR (79-AU-197(3-LI-7,EL)79-AU-197,,DA) The cross section A052100500004 is assumed as Rutherford cross section. A052100500005 CORRECTION For backscattering cross-section from gold the A052100500006 screening of the nuclear charge by the surrounding A052100500007 electrons has to be taken into account. A052100500008 ERR-ANALYS (ERR-T) The error in the determination of the cross A052100500009 section on aluminum is due to the uncertainty in the A052100500010 determination of the ratio of the areal densities gold A052100500011 and aluminum of about 3%, and additionally due to countA052100500012 statistics of the aluminum peak and the background due A052100500013 to nuclear reactions with the carbon substrate. The A052100500014 statistical error of the Au peak was always <0.5%. A052100500015 ENDBIB 13 0 A052100500016 NOCOMMON 0 0 A052100500017 DATA 3 19 A052100500018 EN DATA ERR-T A052100500019 KEV NO-DIM NO-DIM A052100500020 2475. 1.002 0.031 A052100500021 2575. 1.013 0.033 A052100500022 2776. 1.015 0.033 A052100500023 2977. 1.016 0.032 A052100500024 3177. 1.018 0.034 A052100500025 3379. 1.006 0.033 A052100500026 3580. 1.016 0.036 A052100500027 3781. 1.024 0.036 A052100500028 3982. 1.012 0.036 A052100500029 4183. 1.004 0.038 A052100500030 4484. 1.021 0.038 A052100500031 4584. 1.013 0.04 A052100500032 4785. 1.014 0.041 A052100500033 4985. 0.992 0.036 A052100500034 5186. 1.012 0.035 A052100500035 5386. 1.014 0.035 A052100500036 5584. 0.996 0.035 A052100500037 5786. 0.991 0.034 A052100500038 5987. 0.983 0.033 A052100500039 ENDDATA 21 0 A052100500040 ENDSUBENT 39 0 A052100599999 ENDENTRY 5 0 A052199999999