ENTRY O1564 20070914 O034O156400000001 SUBENT O1564001 20070914 O034O156400100001 BIB 12 44 O156400100002 TITLE Elastic proton scattering on He-4 at 156 MeV. O156400100003 AUTHOR (V.Comparat, R.Frascaria, N.Fujiwara, N.Marty, O156400100004 M.Morlet, P.G.Roos, A.Willis) O156400100005 INSTITUTE (2FR PAR) O156400100006 REFERENCE (J,PR/C,12,251,1975) O156400100007 FACILITY (SYNCY,2FR PAR) the Orsay synchrocyclotron. O156400100008 ADD-RES (COMP).Optical potential analysis. O156400100009 SAMPLE Two different targets were used. O156400100010 For laboratory scattering angles less than 30 degrees, O156400100011 a rectangular target 2 cm thick was set normal to the O156400100012 direction of the scattered particles in order to O156400100013 minimize the energy loss by the He-4 particles. For O156400100014 the other angles, the cylindrical target was used. O156400100015 For all angles smaller than 25 degree and at other O156400100016 angles for every second measurement, the background dueO156400100017 to scattering on the Havar windows of the target was O156400100018 measured on an empty target with identical geometry. O156400100019 METHOD (EDE) O156400100020 DETECTOR (TELES,SCIN) O156400100021 Three different arrangements were used. O156400100022 -for Ang(lab) from 8.7 to 60-degree the protons were O156400100023 detected in the image plane of a magnetic analyzer by O156400100024 three telescopes, consisting of three plastic O156400100025 scintillators in coincidence with a large plastic O156400100026 scintillator. O156400100027 -for region from 60 to 120-degree was measured with O156400100028 the delta-E-E telescope was used. O156400100029 For scattering angles less than 90-degree(lab) a thin O156400100030 copper absorber was placed in front of the thick E- O156400100031 plastic scintillator in order to limit the energy the O156400100032 protons incident on the E-detector to less than 100 MeVO156400100033 -from 127.7 to 168 c.m. angles the p-He-4 cross O156400100034 section was measured by detecting the recoil He-4 O156400100035 particles in the image plane of the magnetic analyzer. O156400100036 In order to minimize the detection of protons or O156400100037 deuterons with the same magnetic rigidity an absorber O156400100038 and veto counter were placed behind the three O156400100039 telescopes. O156400100040 ERR-ANALYS (ERR-T).The errors are statistical and normalization. O156400100041 An uncertainty of 5% on the absolute cross sections dueO156400100042 to the uncertainty in the proton-proton reference crossO156400100043 section has not been included. O156400100044 STATUS (TABLE) in text table 1 O156400100045 HISTORY (20070914C) SB O156400100046 ENDBIB 44 0 O156400100047 COMMON 1 3 O156400100048 EN O156400100049 MEV O156400100050 156. O156400100051 ENDCOMMON 3 0 O156400100052 ENDSUBENT 51 0 O156400199999 SUBENT O1564002 20070914 O034O156400200001 BIB 1 1 O156400200002 REACTION (2-HE-4(P,EL)2-HE-4,,DA) O156400200003 ENDBIB 1 0 O156400200004 NOCOMMON 0 0 O156400200005 DATA 3 41 O156400200006 ANG-CM DATA-CM ERR-T O156400200007 ADEG MB/SR MB/SR O156400200008 11.2 75.6 2.19 O156400200009 12.83 73.0 2.14 O156400200010 16.0 52.2 1.5 O156400200011 19.2 39.2 1.1 O156400200012 22.4 26.8 0.8 O156400200013 25.6 15.9 0.44 O156400200014 28.7 10.4 0.31 O156400200015 31.9 7.17 0.21 O156400200016 38.1 4.9 0.17 O156400200017 44.3 2.97 0.10 O156400200018 50.4 1.895 0.064 O156400200019 56.5 1.16 0.042 O156400200020 58.9 1.050 0.035 O156400200021 62.5 0.796 0.026 O156400200022 68.3 0.43 0.014 O156400200023 70.6 0.287 0.010 O156400200024 74.0 0.222 0.0074 O156400200025 79.6 0.134 0.0081 O156400200026 85.2 0.084 0.0050 O156400200027 90.6 0.061 0.004 O156400200028 95.8 0.051 0.0034 O156400200029 101. 0.0436 0.0035 O156400200030 106. 0.038 0.0031 O156400200031 111. 0.0345 0.0025 O156400200032 115.7 0.0287 0.0027 O156400200033 120.4 0.0263 0.0019 O156400200034 124.9 0.0180 0.0018 O156400200035 129.3 0.0130 0.0012 O156400200036 131.7 0.0117 0.0011 O156400200037 133.7 0.00874 0.0010 O156400200038 135.8 0.00786 0.0009 O156400200039 139.5 0.0070 0.009 O156400200040 143.7 0.00707 0.0009 O156400200041 147.7 0.0085 0.0011 O156400200042 151.8 0.0114 0.0016 O156400200043 155.8 0.0125 0.0020 O156400200044 160.0 0.017 0.0025 O156400200045 162.5 0.0157 0.0025 O156400200046 164. 0.017 0.0024 O156400200047 166. 0.020 0.0029 O156400200048 168. 0.0158 0.0042 O156400200049 ENDDATA 43 0 O156400200050 ENDSUBENT 49 0 O156400299999 ENDENTRY 2 0 O156499999999