ENTRY D0520 20091001 D069D052000000001 SUBENT D0520001 20091001 D069D052000100001 BIB 11 29 D052000100002 TITLE The studies of non-Rutherford backscattering cross D052000100003 sections of 4He from 16O D052000100004 AUTHOR (Cheng Huan-Sheng,Shen Hao,Tang Jia-Yong,Yang Fu-Jia) D052000100005 INSTITUTE (3CPRFUD)Department of Physics II D052000100006 REFERENCE (J,ASI/OE,2,641,1993) D052000100007 FACILITY (VDGT,3CPRFUD) NEC 9SDH-2 Pelletron tandem D052000100008 SAMPLE Thin targets were used in order to reduce the D052000100009 scattering ions from the substrates. Aluminium D052000100010 containing natrual oxygen was deposited on a self- D052000100011 supporting carbon film (40 nm), and then coated with D052000100012 a layer of 10 nm Ag. Targets of different thickness D052000100013 were used for the scans over narrow resonances and D052000100014 over slowly varying portions, with an energy loss of D052000100015 4 keV and 8 keV,respectively, in an Al2O3 layer for D052000100016 3MeV alpha particles. D052000100017 MONITOR (47-AG-107(A,EL)47-AG-107,,DA,,RTH)Because the elastic D052000100018 scattering cross section for Ag is expected to be D052000100019 essentially Rutherford even at 9 MeV, the Ag film D052000100020 can be used as a standard. D052000100021 DETECTOR (SIBAR) Annular surface barrier detector with an D052000100022 energy resolution of 25 keV. D052000100023 (SI)Another Au-Si surface barrier detector with a D052000100024 sensitive area of 28mm2 was used. D052000100025 METHOD (BCINT) Beam current monitor, which is a Faraday cup D052000100026 of 100 cm long and 4 cm in diameter. D052000100027 ERR-ANALYS (ERR-S) Statistical uncertainty D052000100028 (ERR-T) total uncertainty is less that 3% D052000100029 HISTORY (20081015C)LV, SD. D052000100030 (20090713A) SD. Year of publication was changed. D052000100031 ENDBIB 29 0 D052000100032 COMMON 1 3 D052000100033 ERR-S D052000100034 PER-CENT D052000100035 1.5 D052000100036 ENDCOMMON 3 0 D052000100037 ENDSUBENT 36 0 D052000199999 NOSUBENT D0520002 20090518 D067D052000200001 NOSUBENT D0520003 20090518 D067D052000300001 ENDENTRY 3 0 D052099999999