ENTRY 22207 20150819 22432220700000001 SUBENT 22207001 20150819 22432220700100001 BIB 18 60 2220700100002 INSTITUTE (2GERKFK) 2220700100003 REFERENCE (J,NP/A,518,561,1990) 2220700100004 AUTHOR (G.Fink,P.Doll,T.D.Ford,R.Garrett,W.Heeringa,K.Hofmann,2220700100005 H.O.Klages,H.Krupp) 2220700100006 TITLE Backward angle np differential cross sections from 2220700100007 22 to 50 MeV. 2220700100008 FACILITY (CYCLO,2GERKFK) The Karlsruhe cyclotron and the 2220700100009 polarized neutron facility POLKA. The beam was pulsed 2220700100010 at a rate of 11 MHz. 2220700100011 REL-REF (I,,H.O.Klages+,J,NIM,219,269,1984) Facility POLKA 2220700100012 description. 2220700100013 (M,,M.Lacombe+,J,PR/C,21,861,1980) the Paris potential 2220700100014 (C,,M.Drosg,J,NSE,180,341,2015) 2220700100015 INC-SOURCE (POLNS) Polarized neutron facility POLKA. 2220700100016 INC-SPECT .Continuous neutron spectrum, distributed from 20 to 2220700100017 50 MeV. The neutron flux was monitored by a set of 2220700100018 proton recoil telescopes. 2220700100019 SAMPLE .The sample was a 30 mg/cm2 polyethylene foil. The 2220700100020 background was measured using a carbon target. 2220700100021 METHOD (TOF) The neutron energy bins were determined by TOF 2220700100022 techniques. 2220700100023 (COINC) The recoil protons were detected with delta-E-E2220700100024 detectors. 2220700100025 DETECTOR (TELES,SI,NAICR) The np scattering took place at the 2220700100026 center of an evacuated 80 cm diameter scattering cham-2220700100027 ber, placed at about 6 m from the neutron source. The 2220700100028 collimated 20 mm diameter neutron beam entered and 2220700100029 left the chamber through 25 micrometer thick stainless2220700100030 steel windows. The recoil protons were detected with 52220700100031 delta-E-E telescopes at various angles. The 12 mm by 2220700100032 42 mm delta-E detectors, 500 micrometers thick, were 2220700100033 of the passivated ion implanted silicon type. The E 2220700100034 detectors were 2.5 cm thick NaI crystals. The protons 2220700100035 were measured in the lab angle range 7.5 to 52.5 deg. 2220700100036 PART-DET (P) 2220700100037 ANALYSIS .The measured relative np scattering cross sections 2220700100038 were normalized by an iterative procedure, involving 2220700100039 phase-shift analyses and predictions from the Paris 2220700100040 potential. 2220700100041 CORRECTION .The data were corrected for cyclotron phase instabili-2220700100042 ties, gain changes in the electronics and various 2220700100043 background effects. 2220700100044 ERR-ANALYS (DATA-ERR) Total errors given include uncertainties 2220700100045 from the corrections, systematic differences of the 2220700100046 detectors and statistical uncertainties, which are 2220700100047 dominating. 2220700100048 (ERR-1) In addition, there is a 1% normalization 2220700100049 uncertainty for the absolute cross section scale. 2220700100050 CRITIQUE Manfred Drosg (2014-12-03): The measurements of all 2220700100051 energies were done at the same angle (white spectrum) 2220700100052 and the center-of-mass angles are the same for all 2220700100053 energies. This is not possible at these energies, in 2220700100054 particular for this light target nucleus. 2220700100055 STATUS (TABLE) .Data taken from NP/A,518,561. 2220700100056 HISTORY (19921213C) N.O. 2220700100057 (19961014U) + + Entry corrected by S. Maev 2220700100058 ERR-1 transferred to Subent 001 2220700100059 (20150819U) SD:Updated to new date formats,lower case. 2220700100060 Corrections according last EXFOR rules and Dict. 2220700100061 CRITIQUE was added. ERR-T -> DATA-ERR in Subent 2. 2220700100062 ENDBIB 60 0 2220700100063 COMMON 1 3 2220700100064 ERR-1 2220700100065 PER-CENT 2220700100066 1.0000E+00 2220700100067 ENDCOMMON 3 0 2220700100068 ENDSUBENT 67 0 2220700199999 SUBENT 22207002 20150819 22432220700200001 BIB 2 3 2220700200002 REACTION (1-H-1(N,EL)1-H-1,,DA) 2220700200003 HISTORY (19961014U) En-mean deleted. DATA-ERR replaced by ERR-T2220700200004 (20150819U) SD: ERR-T replaced by DATA-ERR 2220700200005 ENDBIB 3 0 2220700200006 NOCOMMON 0 0 2220700200007 DATA 5 44 2220700200008 EN-MIN EN-MAX ANG-CM DATA-CM DATA-ERR 2220700200009 MEV MEV ADEG MB/SR MB/SR 2220700200010 20.5 23.5 104.6 34.00 0.19 2220700200011 20.5 23.5 119.6 34.93 0.17 2220700200012 20.5 23.5 134.7 35.97 0.18 2220700200013 20.5 23.5 149.8 36.92 0.19 2220700200014 20.5 23.5 164.9 38.27 0.17 2220700200015 23.5 26.5 104.6 29.39 0.16 2220700200016 23.5 26.5 119.6 30.22 0.14 2220700200017 23.5 26.5 134.7 31.17 0.15 2220700200018 23.5 26.5 149.8 32.78 0.16 2220700200019 23.5 26.5 164.9 34.02 0.15 2220700200020 26.0 29.0 104.6 26.26 0.18 2220700200021 26.0 29.0 119.6 27.17 0.15 2220700200022 26.0 29.0 134.7 28.50 0.17 2220700200023 26.0 29.0 149.8 29.96 0.18 2220700200024 26.0 29.0 164.9 31.22 0.16 2220700200025 28.5 31.5 104.6 23.80 0.16 2220700200026 28.5 31.5 119.6 24.76 0.14 2220700200027 28.5 31.5 134.7 25.77 0.15 2220700200028 28.5 31.5 149.8 27.52 0.16 2220700200029 28.5 31.5 164.9 28.80 0.15 2220700200030 31.5 34.5 89.4 20.39 0.19 2220700200031 31.5 34.5 104.4 20.90 0.18 2220700200032 31.5 34.5 119.5 21.95 0.15 2220700200033 31.5 34.5 134.6 23.14 0.16 2220700200034 31.5 34.5 149.7 25.03 0.18 2220700200035 31.5 34.5 164.8 26.58 0.16 2220700200036 34.5 37.5 89.4 18.49 0.21 2220700200037 34.5 37.5 104.4 19.17 0.20 2220700200038 34.5 37.5 119.5 20.05 0.18 2220700200039 34.5 37.5 134.6 21.16 0.19 2220700200040 34.5 37.5 149.7 23.48 0.21 2220700200041 34.5 37.5 164.8 25.16 0.19 2220700200042 38.0 42.0 89.4 15.89 0.23 2220700200043 38.0 42.0 104.4 16.85 0.22 2220700200044 38.0 42.0 119.5 17.44 0.19 2220700200045 38.0 42.0 134.6 18.89 0.20 2220700200046 38.0 42.0 149.7 21.09 0.23 2220700200047 38.0 42.0 164.8 23.21 0.20 2220700200048 48.0 52.0 89.4 11.02 0.21 2220700200049 48.0 52.0 104.4 11.47 0.21 2220700200050 48.0 52.0 119.5 12.58 0.19 2220700200051 48.0 52.0 134.6 13.88 0.20 2220700200052 48.0 52.0 149.7 16.10 0.23 2220700200053 48.0 52.0 164.8 18.36 0.22 2220700200054 ENDDATA 46 0 2220700200055 ENDSUBENT 54 0 2220700299999 ENDENTRY 2 0 2220799999999