ENTRY D0557 20090208 D066D055700000001 SUBENT D0557001 20090208 D066D055700100001 BIB 10 32 D055700100002 TITLE Elastic scattering cross section of proton from D055700100003 helium at the laboratory angle of 165. degr. D055700100004 AUTHOR (Y.F.Lu,L.Q.Shi,Z.J.He,L.Zhang,B.Zhang,R.Hutton) D055700100005 INSTITUTE (3CPRFUD) D055700100006 REFERENCE (J,NIM/B,267,760,2009) D055700100007 FACILITY (VDGT,3CPRFUD) The NEC 9SDH-22x3MV tandem D055700100008 accelerator at Fudan University. D055700100009 SAMPLE A uniform Ti-He film with 5.3x10**17 atoms/cm2 Ti D055700100010 atoms and 1.87 x10**17 atoms/cm2 He atoms was D055700100011 sputtered onto a 7 mu-m Al foil. Following this an D055700100012 Ag overlayer of 3.3x10**16 atoms/cm2 was deposited D055700100013 on the Ti film in order to prepare an Ag/TiHex/Al D055700100014 target for the cross section measurements. D055700100015 DETECTOR (SIBAR) Au/Si surface barrier detector was placed at D055700100016 the laboratory backward angle of 165. degr. and D055700100017 subtended a solid angle of 1.87/10**3 sr, set by a D055700100018 defining aperture of 3x4 mm. The angular resolution D055700100019 of the detector was thus 1.degr. D055700100020 ERR-ANALYS (ERR-T) The total error associated with the measured D055700100021 cross section are included: D055700100022 * statistical errors and background subtraction D055700100023 uncertainties in the determination of Ag and He peak D055700100024 areas and they are typically +-2-3%. D055700100025 * The error in cross section of Ag,Ruth associated D055700100026 with uncertainties in the scattering angle(+- 1.degr.)D055700100027 * The error from measuring the areal density D055700100028 Ag Nt is less than 4%, and He Nt is less than 5%. D055700100029 (EN-ERR) uncertainty in the proton beam energy(+-6 keV)D055700100030 is less than +-1% in the measured energy region. D055700100031 STATUS (TABLE) Data from Tbl. of the ref. D055700100032 (APRVD) Entry was approved by Dr. L.Q.Shi D055700100033 HISTORY (20090208C) SD D055700100034 ENDBIB 32 0 D055700100035 COMMON 1 3 D055700100036 EN-ERR D055700100037 KEV D055700100038 6.0 D055700100039 ENDCOMMON 3 0 D055700100040 ENDSUBENT 39 0 D055700199999 SUBENT D0557002 20090208 D066D055700200001 BIB 1 1 D055700200002 REACTION (2-HE-4(P,EL)2-HE-4,,DA) D055700200003 ENDBIB 1 0 D055700200004 COMMON 2 3 D055700200005 ANG ERR-T D055700200006 ADEG PER-CENT D055700200007 165. 7.3 D055700200008 ENDCOMMON 3 0 D055700200009 DATA 2 18 D055700200010 EN DATA D055700200011 MEV B/SR D055700200012 1.6 0.193 D055700200013 1.7 0.196 D055700200014 1.8 0.211 D055700200015 1.9 0.237 D055700200016 2.0 0.254 D055700200017 2.1 0.263 D055700200018 2.2 0.271 D055700200019 2.3 0.269 D055700200020 2.4 0.251 D055700200021 2.5 0.229 D055700200022 2.6 0.213 D055700200023 2.7 0.193 D055700200024 2.8 0.174 D055700200025 2.9 0.170 D055700200026 3.0 0.160 D055700200027 3.2 0.136 D055700200028 3.4 0.127 D055700200029 3.6 0.117 D055700200030 ENDDATA 20 0 D055700200031 ENDSUBENT 30 0 D055700299999 ENDENTRY 2 0 D055799999999