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