ENTRY 10187 20010214 00001018700000001 SUBENT 10187001 20010214 00001018700100001 BIB 15 46 1018700100002 INSTITUTE (1USAMHG,1USAPTN,1USASTF) 1018700100003 REFERENCE (J,NP/B,30,77,197107) 1018700100004 AUTHOR (B.G.GIBBARD,M.J.LONGO,L.W.JONES,J.R.FALLON, 1018700100005 M.N.KREISLER,M.L.PERL) 1018700100006 TITLE Neutron-proton elastic scattering from 5 to 30 GeV/c 1018700100007 FACILITY (SYNCH,1USABNL) Brookhaven AGS. 1018700100008 INC-SOURCE (P-BE) 29.4 GeV/c protons incident on beryllium target.1018700100009 SAMPLE Liquid hydrogen target flask was made of .025 cm mylar,1018700100010 length = 30.5 cm, dia.= 6.35 cm. 1018700100011 METHOD Angles of the proton and neutron and proton momentum 1018700100012 were measured and used as inputs for a fitting 1018700100013 program, which included error estimates on the 1018700100014 measured quantities. 1018700100015 DETECTOR (TRD) Scattered neutrons were detected in a thick 1018700100016 plate spark-chamber array while the recoil protons 1018700100017 were detected and momentum analyzed in a magnetic 1018700100018 spectrometer with thin foil spark chambers. 1018700100019 Neutron beam was 15 mrad with respect to primary proton1018700100020 beam. The distance from the internal Be target to 1018700100021 liquid hydrogen sample was 49.2 m. The defining 1018700100022 collimator was 2.54 cm in diameter and was located 1018700100023 34.7 m from internal Be target. 1018700100024 PART-DET (N,P) Both scattered neutrons and recoil protons were 1018700100025 detected 1018700100026 MONITOR (1-H-1(N,TOT),,SIG) 1018700100027 Normalized by fitting 1018700100028 to the zero degree point determined from the optical 1018700100029 theorem and existing data on the real part of the 1018700100030 forward scattering amplitude. The value of the total 1018700100031 neutron-proton cross section used was 38 mb. A linear 1018700100032 variation was assumed in the ratio of the real to the 1018700100033 imaginary part of the scattering amplitude, with 1018700100034 a value -0.33 near 20 GeV/c and -.45 near 5 GeV/c. 1018700100035 CORRECTION Corrections were made for proton energy loss as it 1018700100036 passed through sample, for inelastics, and for target-1018700100037 empty events. 1018700100038 ERR-ANALYS (DATA-ERR) A Monte Carlo study indicated that the 1018700100039 uncertainty in the momentum transfer was essentially 1018700100040 independent of the momentum transfer and of the 1018700100041 incident momentum, remaining constant at +/- 0.017 1018700100042 (GeV/c)**2. 1018700100043 STATUS (APRVD) Approved by author 1018700100044 Data received from M. Perl, 14 August 1973. 1018700100045 HISTORY (19730502C) 1018700100046 (19820916A) Converted to REACTION formalism 1018700100047 (20010214A) Converted to new date formats, lower case. 1018700100048 ENDBIB 46 0 1018700100049 NOCOMMON 0 0 1018700100050 ENDSUBENT 49 0 1018700199999 SUBENT 10187002 20010214 00001018700200001 BIB 2 2 1018700200002 REACTION (1-H-1(N,EL)1-H-1,,DA) 1018700200003 HISTORY (19820901A) SUBENTRIES 2-7 COMBINED. 1018700200004 ENDBIB 2 0 1018700200005 NOCOMMON 0 0 1018700200006 DATA 5 12 1018700200007 EN EN-ERR ANG-CM DATA-CM DATA-ERR 1018700200008 GEV GEV ADEG MB/SR MB/SR 1018700200009 6.5 2.0 13.7 26.09 0.78 1018700200010 6.5 2.0 15.5 18.30 0.58 1018700200011 6.5 2.0 17.2 12.17 0.49 1018700200012 6.5 2.0 18.7 9.73 0.45 1018700200013 6.5 2.0 20.1 6.76 0.39 1018700200014 6.5 2.0 21.4 4.38 0.32 1018700200015 6.5 2.0 22.7 3.05 0.33 1018700200016 6.5 2.0 24.2 3.09 0.27 1018700200017 6.5 2.0 26.6 1.37 0.20 1018700200018 6.5 2.0 28.5 0.91 0.17 1018700200019 6.5 2.0 30.6 0.50 0.13 1018700200020 6.5 2.0 32.1 0.25 0.08 1018700200021 ENDDATA 14 0 1018700200022 ENDSUBENT 21 0 1018700299999 NOSUBENT 10187003 19820916 00001018700300001 NOSUBENT 10187004 19820916 00001018700400001 NOSUBENT 10187005 19820916 00001018700500001 NOSUBENT 10187006 19820916 00001018700600001 NOSUBENT 10187007 19820916 00001018700700001 ENDENTRY 7 0 1018799999999