ENTRY 21699 20200803 22902169900000001 SUBENT 21699001 20200803 22902169900100001 BIB 11 46 2169900100002 TITLE A multiparameter investigation of the H-3 and He-4 2169900100003 emission in the fission of Cf-252 2169900100004 AUTHOR (D.E.Cumpstey,D.G.Vass) 2169900100005 REFERENCE (C,79JUELICH,2,223,1979) Main reference 2169900100006 (J,NP/A,359,377,1981) Data for He-6. 2169900100007 INSTITUTE (2UK EDG). Department of physics. 2169900100008 SAMPLE .Cf-252 source, 1mm diameter, emitting 850 2169900100009 pulses per second. It was a thin and uniform 2169900100010 deposit mounted flush with the surface of the 2169900100011 cathode in the scintillation cell. It was deposited 2169900100012 onto a Ni-foil. 2169900100013 METHOD (EDE) Use of a E-dE detector to identify the 2169900100014 light particles emitted in the fission. 2169900100015 (COINC) A coincidence is required between these 2169900100016 light particles and the output of the fission 2169900100017 detector to select ternary fission events. 2169900100018 DETECTOR (COIN,PROPC,TELES) The fission fragments are detected 2169900100019 in a xenon filled proportional scintillator. It 2169900100020 was filled with xenon at a pressure of 760 torr. 2169900100021 The distance between cathode and anode mesh was 15 2169900100022 mm. The amplitude of the photomultiplier pulse 2169900100023 gave the energy of the fragment. The fall time 2169900100024 of the photomultiplier pulse between 90. And 10% 2169900100025 pulse height yielded the angle of the fission 2169900100026 fragment. The corresponding charged light particles 2169900100027 are identified in coincidence in a telescope 2169900100028 arrangement of two solid state detectors. 2169900100029 The emission angles of the other particles involved 2169900100030 are calculated using conservation of momentum. 2169900100031 The detectors are calibrated with alpha lines from 2169900100032 Pu-239,Am-241,Cm-244. 2169900100033 ANALYSIS .A Gaussian shape was fitted to the light particle 2169900100034 energy distribution. This is due to 13.5 MeV 2169900100035 discrimination level for the alpha particles. 2169900100036 The deviation from the Gaussian shape at lower 2169900100037 energies is therefore not seen. 2169900100038 CORRECTION .Energy losses of the fission fragments in the 2169900100039 xenon gas of the detector and in the nickel foil 2169900100040 backing they go through. 2169900100041 ERR-ANALYS (DATA-ERR) No details given. 2169900100042 HISTORY (19801104C) G.C. 2169900100043 (19810610A) G.C., He-6 data added. 2169900100044 (20090401A) Date is corrected. BIB information added. 2169900100045 Upper case to low converted 2169900100046 (20200803A) SD: Correction in REACTION code in 2169900100047 Subents 002, 003. 2169900100048 ENDBIB 46 0 2169900100049 NOCOMMON 0 0 2169900100050 ENDSUBENT 49 0 2169900199999 SUBENT 21699002 20200803 22902169900200001 BIB 3 4 2169900200002 REACTION (98-CF-252(0,F)2-HE-4,TER,KE) 2169900200003 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 2169900200004 HISTORY (20200803A) SD: SF4=He-4; SF6=AKE -> KE; SF7=A deleted 2169900200005 from REACTION code. STATUS updated. 2169900200006 ENDBIB 4 0 2169900200007 NOCOMMON 0 0 2169900200008 DATA 2 1 2169900200009 DATA DATA-ERR 2169900200010 MEV MEV 2169900200011 16.1 0.8 2169900200012 ENDDATA 3 0 2169900200013 ENDSUBENT 12 0 2169900299999 SUBENT 21699003 20200803 22902169900300001 BIB 3 4 2169900300002 REACTION (98-CF-252(0,F)1-H-3,TER,KE) 2169900300003 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 2169900300004 HISTORY (20200803A) SD: SF4=H-3; SF6=AKE -> KE; SF7=T deleted 2169900300005 from REACTION code. STATUS updated. 2169900300006 ENDBIB 4 0 2169900300007 NOCOMMON 0 0 2169900300008 DATA 2 1 2169900300009 DATA DATA-ERR 2169900300010 MEV MEV 2169900300011 9.0 0.5 2169900300012 ENDDATA 3 0 2169900300013 ENDSUBENT 12 0 2169900399999 SUBENT 21699004 20200803 22902169900400001 BIB 3 4 2169900400002 REACTION ((98-CF-252(0,F)1-H-3,TER,FY)/ 2169900400003 (98-CF-252(0,F)2-HE-4,TER,FY)) 2169900400004 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 2169900400005 HISTORY (20200803U) SD: STATUS updated. 2169900400006 ENDBIB 4 0 2169900400007 NOCOMMON 0 0 2169900400008 DATA 2 1 2169900400009 DATA DATA-ERR 2169900400010 NO-DIM NO-DIM 2169900400011 7.4E-02 3.E-03 2169900400012 ENDDATA 3 0 2169900400013 ENDSUBENT 12 0 2169900499999 SUBENT 21699005 20200803 22902169900500001 BIB 4 6 2169900500002 REACTION ((98-CF-252(0,F)2-HE-6,TER,FY)/ 2169900500003 (98-CF-252(0,F)2-HE-4,TER,FY)) 2169900500004 FLAG (1.) Data obtained in vacuo ( xenon-proportional 2169900500005 scintillator evacuated, no coincidence) 2169900500006 STATUS (TABLE) Table 1 from Nucl.Phys.,A359(1981)377. 2169900500007 HISTORY (20200803U) SD: STATUS updated. 2169900500008 ENDBIB 6 0 2169900500009 NOCOMMON 0 0 2169900500010 DATA 3 2 2169900500011 DATA DATA-ERR FLAG 2169900500012 NO-DIM NO-DIM NO-DIM 2169900500013 2.0E-02 7.E-03 2169900500014 1.9E-02 2.E-03 1. 2169900500015 ENDDATA 4 0 2169900500016 ENDSUBENT 15 0 2169900599999 ENDENTRY 5 0 2169999999999