ENTRY 40011 20141114 41674001100000001
SUBENT 40011001 20141114 41674001100100001
BIB 15 56 4001100100002
TITLE On variation of the kinetic energy of the fragments 4001100100003
from 92-U-235 fission by 0.15-1.68 MeV neutrons 4001100100004
AUTHOR (E.Dermendzhiev, N.Kashukeev, Ts.Panteleev, 4001100100005
Tyan San Khak) 4001100100006
INSTITUTE (4ZZZDUB) 4001100100007
REFERENCE (R,JINR-P3-4873,196912) 4001100100008
REL-REF (I,,S.Bochvarov+,R,JINR-P3-4110,1968) 4001100100009
(I,,V.Z.Mikhaylova+,J,NIM,66,25,1968) 4001100100010
MONITOR No information. 4001100100011
Absolute counting of fission events. 4001100100012
COMMENT Of compiler M.M. 4001100100013
Initially, this MONITOR was compiled in 1970 by reactio4001100100014
(U-235(N,F),,DE,FF,REL)=1. . 4001100100015
In 2014 reaction is 4001100100016
"(U-235(N,F),,AKE,FF) =1. at thermal fission" , 4001100100017
what is wrong, because AKE,FF at thermal fission is 4001100100018
about 170 MeV (TKE) . 4001100100019
FACILITY (VDG,4ZZZDUB) Van de Graaff EG-5 4001100100020
Proton current ~20-30 microA. 4001100100021
INC-SOURCE (P-LI7) Thickness of Li target is 0.38 mg/cm2, 4001100100022
diameter is equal to 1cm . 4001100100023
Energy resolution at all points is about 0.08 MeV. 4001100100024
For fast neutrons in 0.15 MeV - 1.68 MeV energy range.4001100100025
- Thermal neutrons were obtained by slowing-down in 4001100100026
paraffin block. 4001100100027
SAMPLE Two samples in ionization chamber. Diameter 9.2 cm . 4001100100028
Thickness ~ 1.8 mg/cm2 . 4001100100029
METHOD (FISCT) 4001100100030
Cyclic measurements at fast and thermal neutron beams 4001100100031
about 30 min at each beam. 4001100100032
2PI geometry in combination with samples rotation at 4001100100033
45 deg to avoid influence from angular anisotropy of 4001100100034
fission fragments. 4001100100035
PART-DET (FF) Fission-fragments 4001100100036
DETECTOR (FISCH) Double ionization fission chamber. 4001100100037
Registration discrimination thresholds 55-60 MeV and 4001100100038
20 MeV. 4001100100039
ERR-ANALYS (DATA-ERR) Standard deviation. 4001100100040
HISTORY (19700619R) 4001100100041
(19700619C) 4001100100042
(19830303A) corrected in BNL 4001100100043
(19971214A) corrected in CJD 4001100100044
(20141114A) SD: Updated to new date formats,lower case.4001100100045
Code in METHOD deleted. SF6=KE -> AKE in MONITOR and 4001100100046
REACTION code according to EXFOR rules in Subents 1-3.4001100100047
(20141223A) M.M. The article was checked, 4001100100048
BIB information was updated in FACILITY,INC-SOURCE, 4001100100049
METHOD,SAMPLE,DETECTOR,ERR-ANALYS,ANALYSIS,STATUS, 4001100100050
REL-REF,EN-SEC,COMMENTs. 4001100100051
MONITOR was deleted as wrong - see COMMENT of compiler.4001100100052
Reaction was corrected (see ANALYSIS in Subent 002) : 4001100100053
(92-U-235(N,F),,AKE,FF,REL) -> 4001100100054
((92-U-235(N,F),PAR/PRE,FY,,REL/MSC)// 4001100100055
(92-U-235(N,F),PAR/PRE,FY,,REL/MSC)) . 4001100100056
EN -> EN-NM; E1-MIN,E2-MIN, EN-DN, EN-SEC were added. 4001100100057
ARB-UNITS -> NO-DIM . 4001100100058
ENDBIB 56 0 4001100100059
COMMON 1 3 4001100100060
EN-RSL-FW 4001100100061
MEV 4001100100062
0.08 4001100100063
ENDCOMMON 3 0 4001100100064
ENDSUBENT 63 0 4001100199999
SUBENT 40011002 20141114 41674001100200001
BIB 6 45 4001100200002
REACTION ((92-U-235(N,F),PAR/PRE,FY,,MSC)// 4001100200003
(92-U-235(N,F),PAR/PRE,FY,,MSC)) 4001100200004
See ANALYSIS for explanation of measured quantity. 4001100200005
ANALYSIS Relative yield W of fission fragments was defined as: 4001100200006
W=(N1fast/N2fast)/(N1thermal/N2thermal), 4001100200007
N1 - number of counts in 1st sample with high 4001100200008
discrimination threshold E1=55-60 MeV, 4001100200009
N2 - number of counts in 2nd sample with low 4001100200010
discrimination threshold E2=20 MeV; corrected for 4001100200011
backgrounds due to alpha-particles 4001100200012
( average background ~ 2count/min). 4001100200013
fast - for fast neutrons, 4001100200014
thermal - for thermal neutrons. 4001100200015
Maximal counts rate in measurement at thermal neutrons 4001100200016
about 200 count/sec. 4001100200017
EN-SEC (E1-MIN,FF) High discrimination threshold E1=55-60 MeV.4001100200018
(E2-MIN,FF) Low discrimination threshold E2=20 MeV. 4001100200019
COMMENT Of compiler M.M. 4001100200020
On Fig.1 these data are given in two Y scales: 4001100200021
left - W ( see ANALYSIS), right - deltaEk, where 4001100200022
deltaEk - average deviation of fission fragments 4001100200023
kinetic energy at fission by fast neutrons EKfast 4001100200024
from one at fission by thermal neutrons EKthermal, 4001100200025
EKfast-EKthermal. 4001100200026
Scale values correspondence: 4001100200027
W,no-dim deltaEk,MeV 4001100200028
0.96 -0.8 4001100200029
0.98 -0.4 4001100200030
1.00 0. 4001100200031
1.02 0.4 4001100200032
1.04 0.8 4001100200033
So, to define deltaEk (MeV) from W values (no-dim), 4001100200034
a formula could be applied: 4001100200035
deltaEk= (W-1.)*20 . 4001100200036
STATUS (PRELM) Preliminary measurement. 4001100200037
(TABLE) Table 1 of R,JINR-P3-4873,1969 . 4001100200038
HISTORY (19971214A) Reaction quantity corrected 4001100200039
(20141114A) SD: SF6=KE -> AKE in REACTION code 4001100200040
according to EXFOR rules. 4001100200041
(20141223A) M.M. Reaction was corrected 4001100200042
(92-U-235(N,F),,AKE,FF,REL) -> 4001100200043
((92-U-235(N,F),PAR/PRE,FY,,REL/MSC)// 4001100200044
(92-U-235(N,F),PAR/PRE,FY,,REL/MSC)) . 4001100200045
EN -> EN-NM; E1-MIN,E2-MIN, EN-DN, EN-SEC were added. 4001100200046
ARB-UNITS -> NO-DIM . 4001100200047
ENDBIB 45 0 4001100200048
COMMON 3 3 4001100200049
EN-DN E1-MIN E2-MIN 4001100200050
EV MEV MEV 4001100200051
0.0253 55. 20. 4001100200052
ENDCOMMON 3 0 4001100200053
DATA 3 4 4001100200054
EN-NM DATA DATA-ERR 4001100200055
MEV NO-DIM NO-DIM 4001100200056
1.5 0.995 0.026 4001100200057
4.3 1.005 0.020 4001100200058
7.7 1.020 0.019 4001100200059
9.9 1.005 0.023 4001100200060
ENDDATA 6 0 4001100200061
ENDSUBENT 60 0 4001100299999
SUBENT 40011003 20141114 41674001100300001
BIB 5 12 4001100300002
REACTION ((92-U-235(N,F),PAR/PRE,FY,,MSC)// 4001100300003
(92-U-235(N,F),PAR/PRE,FY,,MSC)) 4001100300004
See ANALYSIS for explanation of measured quantity, 4001100300005
in this Subent and in Subent 002. 4001100300006
ANALYSIS Data are averaged on several measurements 4001100300007
See also ANALYSIS in Subent 002 for data definition. 4001100300008
EN-SEC (E1-MIN,FF) High discrimination threshold E1=55-60 MeV.4001100300009
(E2-MIN,FF) Low discrimination threshold E2=20 MeV. 4001100300010
STATUS (TABLE) Table 1 of R,JINR-P3-4873,1969 . 4001100300011
HISTORY (19971214A) Reaction quantity corrected 4001100300012
(20141114A) SD: SF6=KE -> AKE in REACTION code 4001100300013
according to EXFOR rules. 4001100300014
ENDBIB 12 0 4001100300015
COMMON 3 3 4001100300016
EN-DN E1-MIN E2-MIN 4001100300017
EV MEV MEV 4001100300018
0.0253 55. 20. 4001100300019
ENDCOMMON 3 0 4001100300020
DATA 3 14 4001100300021
EN-NM DATA DATA-ERR 4001100300022
MEV NO-DIM NO-DIM 4001100300023
0.26 1.000 0.006 4001100300024
0.37 0.991 0.005 4001100300025
0.49 1.002 0.004 4001100300026
0.59 0.999 0.004 4001100300027
0.71 1.009 0.006 4001100300028
0.77 1.018 0.009 4001100300029
0.81 1.016 0.006 4001100300030
0.88 0.998 0.008 4001100300031
0.99 0.996 0.008 4001100300032
1.09 1.006 0.008 4001100300033
1.21 1.014 0.008 4001100300034
1.38 1.011 0.010 4001100300035
1.58 1.013 0.008 4001100300036
1.68 1.018 0.010 4001100300037
ENDDATA 16 0 4001100300038
ENDSUBENT 37 0 4001100399999
ENDENTRY 3 0 4001199999999