ENTRY 41686 20200610 41884168600000001 SUBENT 41686001 20200610 41884168600100001 BIB 12 34 4168600100002 TITLE Angular distributions and anisotropy of fragments from 4168600100003 the neutron-induced fission of 237Np in the energy 4168600100004 range of 1-200 MeV: Measurement data and model 4168600100005 calculations 4168600100006 AUTHOR (A.S.Vorobyev,A.M.Gagarski,O.A.Shcherbakov, 4168600100007 L.A.Vaishnene,A.L.Barabanov) 4168600100008 INSTITUTE (4RUSLIN) A.S.Vorobyev,A.M.Gagarski,O.A.Shcherbakov, 4168600100009 L.A.Vaishnene 4168600100010 (4RUSKUR) A.L.Barabanov 4168600100011 (4RUSMFT) A.L.Barabanov 4168600100012 REFERENCE (J,JEL,110,242,2019) 4168600100013 #doi:10.1134/S0021364019160124 4168600100014 Engl.translation of : 4168600100015 (J,ZEP,110,222,2019) Issue 4. 4168600100016 SAMPLE (93-NP-237,ENR=0.9999) NpO(2) layer of ~300microg/cm2 4168600100017 thickness, 80 mm diameter on a 100-micron-thick Al 4168600100018 backing of 100 mm diameter; fabricated by painting 4168600100019 technique. 4168600100020 FACILITY (SYNCY,4RUSLIN) Neutron spectrometer GNEIS (Gatchina) 4168600100021 based on 1 GeV proton synchrocyclotron. 4168600100022 METHOD (TOF) 36 m flight path. 4168600100023 DETECTOR (PROPC) Two position-sensitive multiwire proportional 4168600100024 counters . 4168600100025 The acquisition system was based on a 500 MHz FLASH 4168600100026 analog-to-digital converter. 4168600100027 CORRECTION For the real geometry, 4168600100028 For the design and features of detectors operation. 4168600100029 COMMENT Of authors. 4168600100030 This work was partially supported by RFBR project 4168600100031 #18-02-00571 4168600100032 STATUS (APRVD) Approved by the author A.Vorobyev 4168600100033 HISTORY (20200610C) M.M. 4168600100034 Request of the data was sent 10-06-2020 to author. 4168600100035 (20200611R) Data were received from A.Vorobyev 4168600100036 ENDBIB 34 0 4168600100037 NOCOMMON 0 0 4168600100038 ENDSUBENT 37 0 4168600199999 SUBENT 41686002 20200610 41884168600200001 BIB 5 21 4168600200002 REACTION (93-NP-237(N,F),,DA,FF,RSD) 4168600200003 W(0deg)/W(90deg) - angular anisotropy dependence from4168600200004 incident neutron energy. 4168600200005 ANALYSIS Angular distribution was measured in the range 4168600200006 0.24 < COS(THETA) < 1.0 , step COS(theta)=0.01; 4168600200007 was approximated (formula (1) in JETP Letters,v.110, 4168600200008 p.242,2019) by Legendre polynomials of 2nd and 4th 4168600200009 order. 4168600200010 Anisotropy was calculated by coefficients A2, A4 as 4168600200011 W(0deg)/W(90deg)=(1+A2+A4)/(1-A2/2+3*A4/8) 4168600200012 REL-REF (A,13707001,J.E.Brolley Jr+,J,PR,94,640,1954) 4168600200013 (A,13706001,J.E.Simmons+,J,PR,120,198,1960) 4168600200014 (D,13708001,R.B.Leachman+,J,PR,137,B814,1965) 4168600200015 (A,30235001,R.H.Iyer+,C,70MADURAI,2,57,1970) 4168600200016 (D,40277001,D.L.Shpak+,J,SNP,12,19,1971) 4168600200017 (A,40825001,Kh.D.Androsenko+,J,YK,,(46/2),9,1982) 4168600200018 (A,30819001,S.Ouichaoui+,J,AHP,64,209,1988) 4168600200019 ERR-ANALYS (ERR-S) Statistical errors 4168600200020 Average error 1-2 %. 4168600200021 STATUS (TABLE) Data from author. 4168600200022 Data are on Fig.1 of JETP Letters,v.110,p.242,2019 4168600200023 ENDBIB 21 0 4168600200024 COMMON 1 3 4168600200025 ANG 4168600200026 ADEG 4168600200027 0. 4168600200028 ENDCOMMON 3 0 4168600200029 DATA 3 39 4168600200030 EN DATA ERR-S 4168600200031 MEV NO-DIM NO-DIM 4168600200032 300. 0.9578 0.01466 4168600200033 162.2 1.015 0.01068 4168600200034 95.79 1.072 0.01135 4168600200035 63.87 1.075 0.01298 4168600200036 45.75 1.157 0.01333 4168600200037 34.52 1.153 0.01618 4168600200038 26.98 1.203 0.01948 4168600200039 21.7 1.211 0.01878 4168600200040 17.83 1.177 0.02442 4168600200041 14.94 1.215 0.02393 4168600200042 12.67 1.14 0.01997 4168600200043 10.9 1.225 0.01839 4168600200044 9.484 1.235 0.02129 4168600200045 8.329 1.238 0.02173 4168600200046 7.372 1.307 0.02164 4168600200047 6.583 1.211 0.02048 4168600200048 5.905 1.124 0.0237 4168600200049 5.315 1.147 0.02597 4168600200050 4.818 1.113 0.01783 4168600200051 4.39 1.121 0.02027 4168600200052 3.683 1.164 0.01092 4168600200053 3.137 1.132 0.01219 4168600200054 2.707 1.146 0.01165 4168600200055 2.358 1.128 0.01464 4168600200056 2.073 1.118 0.01372 4168600200057 1.838 1.14 0.00962 4168600200058 1.638 1.125 0.01956 4168600200059 1.471 1.154 0.00997 4168600200060 1.327 1.149 0.0182 4168600200061 1.204 1.125 0.01232 4168600200062 1.05 1.084 0.0149 4168600200063 0.9233 1.079 0.01285 4168600200064 0.8174 1.01 0.01594 4168600200065 0.7288 1.023 0.01718 4168600200066 0.6551 0.9677 0.02128 4168600200067 0.5934 0.9476 0.02095 4168600200068 0.5198 0.9778 0.02593 4168600200069 0.4631 0.9861 0.02861 4168600200070 0.3542 0.9878 0.0538 4168600200071 ENDDATA 41 0 4168600200072 ENDSUBENT 71 0 4168600299999 ENDENTRY 2 0 4168699999999