ENTRY O0853 20120520 O048O085300000001 SUBENT O0853001 20120520 O048O085300100001 BIB 16 53 O085300100002 TITLE New data on the proton elastic scattering cross-sectionO085300100003 for silicon O085300100004 REFERENCE (J,NIM/B,161-163,136,2000) O085300100005 AUTHOR (M.J.F.Healy, A.F.Gurbich) O085300100006 INSTITUTE (2UK CRN) Department of materials and medical sciences O085300100007 (4RUSFEI) O085300100008 FACILITY (VDG,2UK CRN) O085300100009 DETECTOR (SIBAR) Surface barrier detector with an energy O085300100010 resolution of 15 keV, area of 50 mm2 and a solid O085300100011 angle of 5 msr at 110. degr. and 170. degr. O085300100012 METHOD (SITA) O085300100013 (EXTB) O085300100014 SAMPLE A thin layer of natural silicon was deposited on a O085300100015 vitreous carbon substrate by argon sputtering. The O085300100016 silicon layer was mounted alongside a Harwell series1 O085300100017 bismuth standard in the analysis chamber and promptly O085300100018 evacuated to minimise exposure to oxygen. The layer O085300100019 was found to contain 6.7 x 10**17 atoms/cm**2 of O085300100020 silicon, 1.5 at.% Oxygen, 0.05 at.% Argon and 0.01% O085300100021 krypton. O085300100022 COMMENT - By authors - abstract. O085300100023 A discrepancy between theoretical and experimental dataO085300100024 for the proton elastic scattering cross-section from O085300100025 silicon was investigated. The proton elastic O085300100026 scattering cross-section for silicon was measured O085300100027 between 600 and 2500 KeV for 110 and 170 degrees O085300100028 backscattering by normalising yields from a thin O085300100029 natural silicon layer against corroborated O085300100030 cross-section data. The results obtained are in good O085300100031 agreement with the theoretical calculations. Thus the O085300100032 discrepancy is resolved and the power of the O085300100033 theoretical approach to cross-section data handling is O085300100034 confirmed by these measurements. O085300100035 MONITOR (14-SI-0(P,EL)14-SI-0,,DA) O085300100036 MONIT-REF (D0107004,R.Amirikas+,J,NIM/B,77,110,1993) O085300100037 The data were used for normalization at beam energies O085300100038 2.40, 2.42, 2.44, 2.46 and 2.48 MeV for 170 degrees O085300100039 scattering cross section and 1.81, 1.82 MeV for 110 O085300100040 degrees scattering. O085300100041 REL-REF (A,O0881004,E.Rauhala,J,NIM/B,12,447,1985) O085300100042 (A,F0571002,R.Salomonovic,J,NIM/B,82,1,1993) O085300100043 The data are used by authors for comparing O085300100044 ERR-ANALYS The combined counting statistics contributed less than O085300100045 2% to the 110 degrees scattering and 3% to the 170 O085300100046 degrees scattering error. O085300100047 STATUS (TABLE) Data from Dr. A.F.Gurbich O085300100048 ADD-RES (COMP) Another experimental data O085300100049 (P-SPC) O085300100050 HISTORY (20010503C) O085300100051 (20010530R) O085300100052 (20030501U) Last checking has been done. O085300100053 (20120520A) SD: Vol. of ref. on NIM/B,161 corrected. O085300100054 MONITOR was added. BIB update. O085300100055 ENDBIB 53 0 O085300100056 COMMON 1 3 O085300100057 ANG-ERR O085300100058 ADEG O085300100059 1. O085300100060 ENDCOMMON 3 0 O085300100061 ENDSUBENT 60 0 O085300199999 SUBENT O0853002 20120520 O048O085300200001 BIB 4 6 O085300200002 REACTION (14-SI-0(P,EL)14-SI-0,,DA) O085300200003 PART-DET (P) O085300200004 COMMENT - By authors. The cross section data may be O085300200005 overestimated by up to 1.5% because of a contribution O085300200006 from oxygen at low energies. O085300200007 HISTORY (20120520U) SD: Col.ANG and EN were swapped. O085300200008 ENDBIB 6 0 O085300200009 NOCOMMON 0 0 O085300200010 DATA 3 26 O085300200011 ANG EN DATA O085300200012 ADEG KEV MB/SR O085300200013 110. 900. 656. O085300200014 110. 1000. 574. O085300200015 110. 1050. 557. O085300200016 110. 1100. 466. O085300200017 110. 1150. 432. O085300200018 110. 1200. 384. O085300200019 110. 1300. 328. O085300200020 110. 1400. 289. O085300200021 110. 1500. 252. O085300200022 110. 1820. 163. O085300200023 170. 800. 419. O085300200024 170. 900. 335. O085300200025 170. 1000. 283. O085300200026 170. 1050. 231. O085300200027 170. 1100. 217. O085300200028 170. 1150. 213. O085300200029 170. 1200. 181. O085300200030 170. 1250. 160. O085300200031 170. 1300. 146. O085300200032 170. 1350. 132. O085300200033 170. 1400. 124. O085300200034 170. 1450. 106. O085300200035 170. 1500. 96. O085300200036 170. 1550. 76. O085300200037 170. 1600. 53. O085300200038 170. 1615. 41. O085300200039 ENDDATA 28 0 O085300200040 ENDSUBENT 39 0 O085300299999 ENDENTRY 2 0 O085399999999