ENTRY 20751 20120715 22322075100000001 SUBENT 20751001 20120715 22322075100100001 BIB 16 75 2075100100002 INSTITUTE (2ITYPAD) Instituto di Fisica. 2075100100003 REFERENCE (J,NC/A,31,(1),1,1976) 2075100100004 (W,DRIGO,19780124) Informations about the experience 2075100100005 were given in the special condensed form. 2075100100006 REL-REF (I,20969001,L.Drigo+,J,NP/A,181,177,1972) Experimental 2075100100007 details given. 2075100100008 AUTHOR (L.Drigo,G.Tornielli,G.Zannoni) 2075100100009 TITLE Polarization in the 16-O(n,n) reaction 2075100100010 FACILITY (VDG,2ITYPAD) 5.5MeV Van de Graaff,at the Laboratori 2075100100011 Nazionali di Lignaro, in pulsed operation 2075100100012 using pulsed proton and deuteron beams by (1/2) 2075100100013 micro-A in mean current and by less than 2ns in 2075100100014 pulse duration. 2075100100015 INC-SOURCE (POLNS,P-LI7) Lithium-7 was a solid target, 1 mg/cm2 2075100100016 thick, obtained from evaporation of Li-F. 2075100100017 (POLNS,D-C12) Carbon-12 was a solid target, 1 mg/cm2 2075100100018 thick, obtained from deposition of colloidal graphite 2075100100019 suspension. 2075100100020 (POLNS,D-D) Deuterium was a gaseous target,.4 mg/cm2 2075100100021 thick. The neutrons of all three reactions were 2075100100022 polarized. 2075100100023 SAMPLE .Liquid oxigen cylinder(16 cm high,6 cm in diam), 2075100100024 contained in a polyethylene bag(.15 mm thick),placed 2075100100025 inside a cylindrical hole(6 cm diam) in a polystirol 2075100100026 cylinder(48 cm high,41 cm diam,0.01 g/cm3 in density),2075100100027 whose vertical axis was 108 cm from the neutron source2075100100028 .Oxygen was considered to be practically 8-O-16. 2075100100029 METHOD (TOF ) For details see NP/A 181. 2075100100030 (COINC) pulse height and time information. 2075100100031 DETECTOR (SCIN ) Fourteen NE213 liquid scintillators placed at 2075100100032 100 cm from the O-target,in a water filed 2075100100033 cylindrical container (16 cm high,4.8 cm diam.), 2075100100034 Seven on the left and seven on the right of the 2075100100035 neutron collimated beam. 2075100100036 .The left-right counter system,together with the 2075100100037 O-target,could be rotated about a vertical axis 2075100100038 going through the neutron source. 2075100100039 ANALYSIS .In order to obtain the polarization p(e,teta) from the2075100100040 initial exp-data,i.e.left-right ratios,authors used 2075100100041 previous works and data on the polarization of 2075100100042 neutrons issued from the 3 n-source reactions used. 2075100100043 COMMENT .A phase shift analysis on the polarization data with 2075100100044 the cross section data at the same energies,has been 2075100100045 carried out,with the aim of improving the agreement 2075100100046 between the phase shift calculations and the 2075100100047 experimental results. 2075100100048 .A phase shift table resulting from least square fits 2075100100049 of polarization and cross section data has been given.2075100100050 STATUS (TABLE) .Tbl. III, IV from NC/A 31. 2075100100051 CORRECTION .The effect of dead time and of the detector efficiency2075100100052 were neglected in evaluating the experimental left- 2075100100053 right ratios,but not the relative cross section 2075100100054 measurements for which they were taken into account 2075100100055 as well as the pulse bias changes and the second 2075100100056 neutron group in the 7-Li(p,n) source and they gave 2075100100057 rise to a sum of error ranging from 3 to 6%. 2075100100058 .Experimental values of left-right ratios and of cross-2075100100059 sections were corrected for multiple scattering in the2075100100060 sample and for finite angular resolution by means of 2075100100061 monte-carlo calculations. 2075100100062 .Previous data were used in correcting the present 2075100100063 experimental data. 2075100100064 .Background subtracted. 2075100100065 ERR-ANALYS .The statistical uncertainty on left-right ratios are 2075100100066 in the range of 0.01 to 0.04%,except for the 3 MeV 2075100100067 neutrons produced by 12-C(d,n)reaction at 60 degrees. 2075100100068 .Uncertainty on energy was 50 keV for Li-7(p,n) 2075100100069 source,and 100 keV for the other sources. 2075100100070 HISTORY (19771209C) 2075100100071 (19780705E) 2075100100072 (19801112A) G.C., Reaction strings corrected. 2075100100073 (19801121E) 2075100100074 (20120715A) SD: Updated to new date formats,lower case.2075100100075 Corrections according last EXFOR rules and Dict. 2075100100076 MONITOR moved to Subent 2. Ref. corrected. 2075100100077 ENDBIB 75 0 2075100100078 NOCOMMON 0 0 2075100100079 ENDSUBENT 78 0 2075100199999 SUBENT 20751002 20120715 22322075100200001 BIB 5 10 2075100200002 REACTION (8-O-16(N,EL)8-O-16,,DA) 2075100200003 MONITOR (8-O-16(N,EL)8-O-16,,SIG) 2075100200004 .The relative elastic differential cross section 2075100200005 obtained were normalized using the elastic cross 2075100200006 section values of Fowler et al,PR/C,8,545,1973,such 2075100200007 as to give the present absolute values. 2075100200008 ERR-ANALYS (DATA-ERR) No information. 2075100200009 MONIT-REF (10137001,J.L.Fowler+,J,PR/C,8,545,1973) 2075100200010 HISTORY (19801112A) G.C., Reaction string corrected. 2075100200011 (19801121E) 2075100200012 ENDBIB 10 0 2075100200013 NOCOMMON 0 0 2075100200014 DATA 4 14 2075100200015 EN ANG DATA DATA-ERR 2075100200016 MEV ADEG MB/SR MB/SR 2075100200017 2.5600E+00 2.5000E+01 8.0000E+01 5.0000E+00 2075100200018 2.5600E+00 4.5000E+01 9.4000E+01 5.0000E+00 2075100200019 2.5600E+00 6.5000E+01 1.0400E+02 5.0000E+00 2075100200020 2.5600E+00 9.0000E+01 9.9000E+01 1.4000E+01 2075100200021 2.5600E+00 1.1500E+02 8.0000E+01 5.0000E+00 2075100200022 2.5600E+00 1.3500E+02 6.3000E+01 4.0000E+00 2075100200023 2.5600E+00 1.5500E+02 7.1000E+01 4.0000E+00 2075100200024 2.7600E+00 2.5000E+01 8.3000E+01 4.0000E+00 2075100200025 2.7600E+00 4.5000E+01 9.8000E+01 4.0000E+00 2075100200026 2.7600E+00 6.5000E+01 1.0800E+02 7.0000E+00 2075100200027 2.7600E+00 9.0000E+01 8.6000E+01 5.0000E+00 2075100200028 2.7600E+00 1.1500E+02 7.4000E+01 4.0000E+00 2075100200029 2.7600E+00 1.3500E+02 7.3000E+01 4.0000E+00 2075100200030 2.7600E+00 1.5500E+02 7.3000E+01 5.0000E+00 2075100200031 ENDDATA 16 0 2075100200032 ENDSUBENT 31 0 2075100299999 SUBENT 20751003 20120715 22322075100300001 BIB 3 5 2075100300002 REACTION (8-O-16(N,EL)8-O-16,,POL/DA,,ANA) 2075100300003 ERR-ANALYS (DATA-ERR) .The errors on polarization values are a 2075100300004 quadratic mean of statistical errors of both the 2075100300005 experimental data and the Monte-Carlo calculations. 2075100300006 HISTORY (20120715A) SD: SF8=ANA was added to REACTION code. 2075100300007 ENDBIB 5 0 2075100300008 NOCOMMON 0 0 2075100300009 DATA 4 49 2075100300010 EN ANG DATA DATA-ERR 2075100300011 MEV ADEG NO-DIM NO-DIM 2075100300012 2.2500E+00 2.5000E+01 1.6000E-01 3.0000E-02 2075100300013 2.2500E+00 4.5000E+01 3.9000E-01 3.0000E-02 2075100300014 2.2500E+00 6.5000E+01 5.7000E-01 4.0000E-02 2075100300015 2.2500E+00 9.0000E+01 5.1000E-01 5.0000E-02 2075100300016 2.2500E+00 1.1500E+02 2.3000E-01 5.0000E-02 2075100300017 2.2500E+00 1.3500E+02 1.0000E-01 5.0000E-02 2075100300018 2.2500E+00 1.5500E+02 3.0000E-02 6.0000E-02 2075100300019 2.5600E+00 2.5000E+01 2.9000E-01 4.0000E-02 2075100300020 2.5600E+00 4.5000E+01 4.2000E-01 2.0000E-02 2075100300021 2.5600E+00 6.5000E+01 4.7000E-01 2.0000E-02 2075100300022 2.5600E+00 9.0000E+01 4.1000E-01 2.0000E-02 2075100300023 2.5600E+00 1.1500E+02 3.2000E-01 4.0000E-02 2075100300024 2.5600E+00 1.3500E+02 2.6000E-01 6.0000E-02 2075100300025 2.5600E+00 1.5500E+02 1.5000E-01 1.4000E-01 2075100300026 2.7600E+00 2.5000E+01 9.0000E-02 7.0000E-02 2075100300027 2.7600E+00 4.5000E+01 1.8000E-01 5.0000E-02 2075100300028 2.7600E+00 6.5000E+01 2.9000E-01 5.0000E-02 2075100300029 2.7600E+00 9.0000E+01 4.0000E-01 7.0000E-02 2075100300030 2.7600E+00 1.1500E+02 4.6000E-01 1.0000E-01 2075100300031 2.7600E+00 1.3500E+02 4.2000E-01 1.5000E-01 2075100300032 2.7600E+00 1.5500E+02 2.6000E-01 2.4000E-01 2075100300033 3.0000E+00 2.5000E+01-2.1000E-01 6.0000E-02 2075100300034 3.0000E+00 4.5000E+01-3.0000E-01 6.0000E-02 2075100300035 3.0000E+00 6.5000E+01-1.0000E-01 8.0000E-02 2075100300036 3.0000E+00 9.0000E+01 6.0000E-01 9.0000E-02 2075100300037 3.0000E+00 1.1500E+02 9.3000E-01 1.2000E-01 2075100300038 3.0000E+00 1.3500E+02 9.5000E-01 1.3000E-01 2075100300039 3.0000E+00 1.5500E+02 7.9000E-01 2.8000E-01 2075100300040 3.3500E+00 2.5000E+01 3.7000E-01 3.0000E-02 2075100300041 3.3500E+00 4.5000E+01 7.0000E-01 4.0000E-02 2075100300042 3.3500E+00 6.5000E+01 9.8000E-01 7.0000E-02 2075100300043 3.3500E+00 9.0000E+01-7.9000E-01 1.2000E-01 2075100300044 3.3500E+00 1.1500E+02 1.0000E-01 7.0000E-02 2075100300045 3.3500E+00 1.3500E+02 5.5000E-01 6.0000E-02 2075100300046 3.3500E+00 1.5500E+02 5.6000E-01 7.0000E-02 2075100300047 3.5600E+00 2.5000E+01 4.9000E-01 3.0000E-02 2075100300048 3.5600E+00 4.5000E+01 7.9000E-01 4.0000E-02 2075100300049 3.5600E+00 6.5000E+01 5.0000E-01 8.0000E-02 2075100300050 3.5600E+00 9.0000E+01-9.6000E-01 6.0000E-02 2075100300051 3.5600E+00 1.1500E+02-2.5000E-01 8.0000E-02 2075100300052 3.5600E+00 1.3500E+02 8.0000E-01 6.0000E-02 2075100300053 3.5600E+00 1.5500E+02 9.3000E-01 8.0000E-02 2075100300054 3.9000E+00 2.5000E+01-1.5000E-01 3.0000E-02 2075100300055 3.9000E+00 4.5000E+01-2.6000E-01 6.0000E-02 2075100300056 3.9000E+00 6.5000E+01-5.3000E-01 8.0000E-02 2075100300057 3.9000E+00 9.0000E+01-8.8000E-01 8.0000E-02 2075100300058 3.9000E+00 1.1500E+02-6.3000E-01 8.0000E-02 2075100300059 3.9000E+00 1.3500E+02-1.2000E-01 1.0000E-01 2075100300060 3.9000E+00 1.5500E+02 3.3000E-01 2.6000E-01 2075100300061 ENDDATA 51 0 2075100300062 ENDSUBENT 61 0 2075100399999 ENDENTRY 3 0 2075199999999