ENTRY 30970 20090915 31413097000000001 SUBENT 30970001 20090915 31413097000100001 BIB 14 41 3097000100002 TITLE Analyzing-power in neutron-proton scattering 3097000100003 at 21.6 MeV 3097000100004 AUTHOR (B.R.S.Simpson,F.D.Brooks) 3097000100005 INSTITUTE (3SAFSCT) 3097000100006 REFERENCE (J,NP/A,505,361,1989) 3097000100007 SAMPLE Anthracene scintillation crystal as neutron scatterer 3097000100008 FACILITY (VDG) 3097000100009 INC-SOURCE (D-T) Neutrons were produced by bombarding a tritium 3097000100010 target with 5.5 MeV pulsed deuterons. For the analyzing3097000100011 power measurements the neutron reaction angle selected 3097000100012 was 20 deg, providing an incident beam of polarized 3097000100013 neutrons 3097000100014 DETECTOR (SCIN) Anthracene scintillation crystal(same as sample)3097000100015 PART-DET (P) Recoil protons 3097000100016 METHOD (REC,PSD,PHD) The sensitivity of the pulse height and 3097000100017 pulse shape outputs to the direction of the recoil 3097000100018 proton relative to the axes of the anthracene crystal 3097000100019 was utilized to measure left-right asymmetries of the 3097000100020 recoil protons. 3097000100021 ANALYSIS The asymmetry and the associated neutron C.M. 3097000100022 scattering angle were determined from the pulse height 3097000100023 and pulse shape outputs of the detected recoil protons.3097000100024 An additional scintillator detector was placed at 3097000100025 different laboratory angles with respect to the beam 3097000100026 axis to detect scattered neutrons coincident with the 3097000100027 anthracene crystal signals. Coincident events, which 3097000100028 formed a small part of the scatters recorded by the an-3097000100029 thracene were tagged out throughout the experiment and 3097000100030 formed the basis for the calibration of the measurement3097000100031 of the neutron scattering angle from the pulse height 3097000100032 and pulse shape data. 3097000100033 The final asymmetry values are weighted averages of 3097000100034 results from four independent experimental runs. 3097000100035 CORRECTION Corrections have been made for the effects of recoil 3097000100036 proton escape from the crystal on the measurements, 3097000100037 and for instrumental asymmetries which were determined 3097000100038 from null polarization data collected using the 3097000100039 unpolarized 22 MeV neutron beam emitted at 0 deg. 3097000100040 STATUS (TABLE) Data are taken from J,NP/A,505,361,98, Table 1 3097000100041 HISTORY (19911218C) HW 3097000100042 (20090912A) SD:Updated to new date formats,lower case. 3097000100043 ENDBIB 41 0 3097000100044 NOCOMMON 0 0 3097000100045 ENDSUBENT 44 0 3097000199999 SUBENT 30970002 20090915 31413097000200001 BIB 2 9 3097000200002 REACTION (1-H-1(N,EL)1-H-1,,POL/DA,,ANA) 3097000200003 ERR-ANALYS (ANG-ERR) Angle errors corresponding to the angle-bin 3097000200004 widths used in the data analysis. 3097000200005 (DATA-ERR1) Partial statistical uncertainties 3097000200006 calculated for uncorrected measurements alone. 3097000200007 (ERR-S) Total statistical uncertainties including 3097000200008 the error determined from the null polarization 3097000200009 measurements used for the corrections for instrumental 3097000200010 asymmetries 3097000200011 ENDBIB 9 0 3097000200012 COMMON 3 3 3097000200013 EN POL-BM POL-BM-ERR 3097000200014 MEV NO-DIM NO-DIM 3097000200015 21.6 0.25 0.01 3097000200016 ENDCOMMON 3 0 3097000200017 DATA 5 5 3097000200018 ANG-CM ANG-ERR DATA DATA-ERR1 ERR-S 3097000200019 ADEG ADEG NO-DIM NO-DIM NO-DIM 3097000200020 77.5 2.5 0.0575 0.0065 0.0073 3097000200021 90. 10.0 0.0469 0.0031 0.0046 3097000200022 110. 10.0 0.0372 0.0036 0.0050 3097000200023 130. 10.0 0.0278 0.0042 0.0054 3097000200024 150. 10.0 0.0089 0.0066 0.0074 3097000200025 ENDDATA 7 0 3097000200026 ENDSUBENT 25 0 3097000299999 ENDENTRY 2 0 3097099999999