ENTRY 21699 20200803 229021699 0 1 SUBENT 21699001 20200803 229021699 1 1 BIB 11 46 21699 1 2 TITLE A multiparameter investigation of the H-3 and He-4 21699 1 3 emission in the fission of Cf-252 21699 1 4 AUTHOR (D.E.Cumpstey,D.G.Vass) 21699 1 5 REFERENCE (C,79JUELICH,2,223,1979) Main reference 21699 1 6 (J,NP/A,359,377,1981) Data for He-6. 21699 1 7 INSTITUTE (2UK EDG). Department of physics. 21699 1 8 SAMPLE .Cf-252 source, 1mm diameter, emitting 850 21699 1 9 pulses per second. It was a thin and uniform 21699 1 10 deposit mounted flush with the surface of the 21699 1 11 cathode in the scintillation cell. It was deposited 21699 1 12 onto a Ni-foil. 21699 1 13 METHOD (EDE) Use of a E-dE detector to identify the 21699 1 14 light particles emitted in the fission. 21699 1 15 (COINC) A coincidence is required between these 21699 1 16 light particles and the output of the fission 21699 1 17 detector to select ternary fission events. 21699 1 18 DETECTOR (COIN,PROPC,TELES) The fission fragments are detected 21699 1 19 in a xenon filled proportional scintillator. It 21699 1 20 was filled with xenon at a pressure of 760 torr. 21699 1 21 The distance between cathode and anode mesh was 15 21699 1 22 mm. The amplitude of the photomultiplier pulse 21699 1 23 gave the energy of the fragment. The fall time 21699 1 24 of the photomultiplier pulse between 90. And 10% 21699 1 25 pulse height yielded the angle of the fission 21699 1 26 fragment. The corresponding charged light particles 21699 1 27 are identified in coincidence in a telescope 21699 1 28 arrangement of two solid state detectors. 21699 1 29 The emission angles of the other particles involved 21699 1 30 are calculated using conservation of momentum. 21699 1 31 The detectors are calibrated with alpha lines from 21699 1 32 Pu-239,Am-241,Cm-244. 21699 1 33 ANALYSIS .A Gaussian shape was fitted to the light particle 21699 1 34 energy distribution. This is due to 13.5 MeV 21699 1 35 discrimination level for the alpha particles. 21699 1 36 The deviation from the Gaussian shape at lower 21699 1 37 energies is therefore not seen. 21699 1 38 CORRECTION .Energy losses of the fission fragments in the 21699 1 39 xenon gas of the detector and in the nickel foil 21699 1 40 backing they go through. 21699 1 41 ERR-ANALYS (DATA-ERR) No details given. 21699 1 42 HISTORY (19801104C) G.C. 21699 1 43 (19810610A) G.C., He-6 data added. 21699 1 44 (20090401A) Date is corrected. BIB information added. 21699 1 45 Upper case to low converted 21699 1 46 (20200803A) SD: Correction in REACTION code in 21699 1 47 Subents 002, 003. 21699 1 48 ENDBIB 46 0 21699 1 49 NOCOMMON 0 0 21699 1 50 ENDSUBENT 49 0 21699 199999 SUBENT 21699002 20200803 229021699 2 1 BIB 3 4 21699 2 2 REACTION (98-CF-252(0,F)2-HE-4,TER,KE) 21699 2 3 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 21699 2 4 HISTORY (20200803A) SD: SF4=He-4; SF6=AKE -> KE; SF7=A deleted 21699 2 5 from REACTION code. STATUS updated. 21699 2 6 ENDBIB 4 0 21699 2 7 NOCOMMON 0 0 21699 2 8 DATA 2 1 21699 2 9 DATA DATA-ERR 21699 2 10 MEV MEV 21699 2 11 16.1 0.8 21699 2 12 ENDDATA 3 0 21699 2 13 ENDSUBENT 12 0 21699 299999 SUBENT 21699003 20200803 229021699 3 1 BIB 3 4 21699 3 2 REACTION (98-CF-252(0,F)1-H-3,TER,KE) 21699 3 3 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 21699 3 4 HISTORY (20200803A) SD: SF4=H-3; SF6=AKE -> KE; SF7=T deleted 21699 3 5 from REACTION code. STATUS updated. 21699 3 6 ENDBIB 4 0 21699 3 7 NOCOMMON 0 0 21699 3 8 DATA 2 1 21699 3 9 DATA DATA-ERR 21699 3 10 MEV MEV 21699 3 11 9.0 0.5 21699 3 12 ENDDATA 3 0 21699 3 13 ENDSUBENT 12 0 21699 399999 SUBENT 21699004 20200803 229021699 4 1 BIB 3 4 21699 4 2 REACTION ((98-CF-252(0,F)1-H-3,TER,FY)/ 21699 4 3 (98-CF-252(0,F)2-HE-4,TER,FY)) 21699 4 4 STATUS (TABLE) Data taken from table II of 79JUELICH,2,223 21699 4 5 HISTORY (20200803U) SD: STATUS updated. 21699 4 6 ENDBIB 4 0 21699 4 7 NOCOMMON 0 0 21699 4 8 DATA 2 1 21699 4 9 DATA DATA-ERR 21699 4 10 NO-DIM NO-DIM 21699 4 11 7.4E-02 3.E-03 21699 4 12 ENDDATA 3 0 21699 4 13 ENDSUBENT 12 0 21699 499999 SUBENT 21699005 20200803 229021699 5 1 BIB 4 6 21699 5 2 REACTION ((98-CF-252(0,F)2-HE-6,TER,FY)/ 21699 5 3 (98-CF-252(0,F)2-HE-4,TER,FY)) 21699 5 4 FLAG (1.) Data obtained in vacuo ( xenon-proportional 21699 5 5 scintillator evacuated, no coincidence) 21699 5 6 STATUS (TABLE) Table 1 from Nucl.Phys.,A359(1981)377. 21699 5 7 HISTORY (20200803U) SD: STATUS updated. 21699 5 8 ENDBIB 6 0 21699 5 9 NOCOMMON 0 0 21699 5 10 DATA 3 2 21699 5 11 DATA DATA-ERR FLAG 21699 5 12 NO-DIM NO-DIM NO-DIM 21699 5 13 2.0E-02 7.E-03 21699 5 14 1.9E-02 2.E-03 1. 21699 5 15 ENDDATA 4 0 21699 5 16 ENDSUBENT 15 0 21699 599999 ENDENTRY 5 0 2169999999999