ENTRY C2831 20221004 C283100000001 SUBENT C2831001 20221004 20231011 C283100100001 BIB 11 35 C283100100002 TITLE P-P Differential Elastic Scattering Cross Sections at C283100100003 144, 271, and 429 Mev C283100100004 AUTHOR (V.A.Nedzel,J.Marshall, L.Marshall) C283100100005 REFERENCE (J,PR,93,927(M1),1954) C283100100006 #doi:10.1103/PhysRev.93.909 C283100100007 INSTITUTE (1USACHI) C283100100008 FACILITY (SYNCY,1USACHI) The Chicago synchrocyclotron. C283100100009 DETECTOR (TELES,SCIN) Five scintillation counters. C283100100010 SAMPLE The scatterer was a 4-in. vertical cylinder of liquid C283100100011 hydrogen contained in styrofoam walls. C283100100012 METHOD (COINC) The p-p differential elastic scattering cross C283100100013 section at 90 degree baricentral angle has been C283100100014 measured for three proton energies and has been found C283100100015 to be independent of energy in this range. Sizable C283100100016 intensities of proton beams of a wide range in energy C283100100017 were obtained by the proper azimuthal positioning of C283100100018 a beryllium scattering target at 76 in. radius in the C283100100019 Chicago synchrocyclotron. The protons collimated by a C283100100020 channel in the heavy shield were of definite energy C283100100021 for a given target position. They were further C283100100022 analyzed by an additional magnet. The analyzed C283100100023 collimated beam was defined and measured before the C283100100024 scatterer by a telescope of 2 scintillation counters C283100100025 (1-2). Two scintillation counters (3 and 4) were C283100100026 placed on opposite sides of the beam, connected in C283100100027 coincidence with counters 1 and 2 in such a way that C283100100028 they counted the two elastically scattered protons in C283100100029 coincidence with the incident proton. C283100100030 ERR-ANALYS (DATA-ERR) No details on sources of uncertainties. C283100100031 CORRECTION In order to avoid counting loss corrections, a fifth C283100100032 counter which counted protons scattered out of the C283100100033 main beam was used to normalize the incident flux at C283100100034 low-beam intensities and to normalize the quadruple C283100100035 coincidence rate at high beam intensity. C283100100036 HISTORY (20221004C) BP C283100100037 ENDBIB 35 0 C283100100038 COMMON 1 3 C283100100039 ANG C283100100040 ADEG C283100100041 90.0 C283100100042 ENDCOMMON 3 0 C283100100043 ENDSUBENT 42 0 C283100199999 SUBENT C2831002 20221004 20231011 C283100200001 BIB 2 2 C283100200002 REACTION (1-H-1(P,EL)1-H-1,,DA) C283100200003 STATUS (TABLE) page 927 of J,PR,93,927(M1),1954. C283100200004 ENDBIB 2 0 C283100200005 NOCOMMON 0 0 C283100200006 DATA 3 3 C283100200007 EN DATA DATA-ERR C283100200008 MEV MB/SR MB/SR C283100200009 144.0 3.21 0.11 C283100200010 271.0 3.67 0.34 C283100200011 429.0 3.42 0.13 C283100200012 ENDDATA 5 0 C283100200013 ENDSUBENT 12 0 C283100299999 ENDENTRY 2 0 C283199999999