ENTRY 40701 20210312 41954070100000001
SUBENT 40701001 20210312 41954070100100001
BIB 17 76 4070100100002
TITLE Measurement of the cross sections of the reaction 4070100100003
237Np(n,2n)236Np (22.5 h) for neutron energies in the 4070100100004
range 7-10 MeV 4070100100005
AUTHOR (N.V.Kornilov,V.Ya.Baryba,A.V.Balitskii,A.P.Rudenko, 4070100100006
B.D.Kuz'minov,O.A.Sal'nikov, 4070100100007
E.A.Gromova,S.S.Kovalenko,L.D.Preobrazhenskaya, 4070100100008
A.V.Stepanov,Yu.A.Nemilov,Yu.A.Selitskii,B.I.Tarler, 4070100100009
V.B.Funshtein,V.A.Yakovlev, 4070100100010
Sh.Darotsi,P.Raich,I.Chikai) 4070100100011
Sh.Darotsi = S.Daroczy; P.Raich = P.Raics, 4070100100012
I.Chikai = J.Csikai 4070100100013
INSTITUTE (4RUSFEI) First six authors 4070100100014
(4RUSRI) Nine following authors 4070100100015
(3HUNKOS) Three last authors 4070100100016
REFERENCE (J,AE,58,117,1985) Issue 2. 4070100100017
(J,SJA,58,131,1985) 4070100100018
#doi:10.1007/BF01122203 4070100100019
Engl.transl.of At.Energy,v.58,is.2,p.117,1985 4070100100020
(S,IAEA-TECDOC-336,305,1985) in English 4070100100021
REL-REF (M,30561001,N.V.Kornilov+,J,AE,49,283,1980) Issue 5. 4070100100022
Kornilov et.al, experimental details. U8(n,2n). 4070100100023
(M,30561001,N.V.Kornilov+,J,SJA,49,722,1980) 4070100100024
Engl.translation of At.Energy,v.49,is.5,p.283,1980. 4070100100025
FACILITY (VDGT,4RUSFEI) Charge exchange accelerator EGM-10M. 4070100100026
INC-SOURCE (D-D) 4070100100027
MONITOR Three monitors for neutron flux. 4070100100028
1(13-AL-27(N,A)11-NA-24,,SIG) 4070100100029
2(92-U-238(N,F),,SIG) 4070100100030
3(92-U-238(N,2N)92-U-237,,SIG) 4070100100031
MONIT-REF 1(,B.Magurno,R,IAEA-208,375,1978) 4070100100032
ENDF/B-V dosim.file 4070100100033
2(,N.V.Kornilov,J,YK,,(1/45),33,1982) 4070100100034
3(,B.Magurno,R,IAEA-208,375,1978) 4070100100035
ENDF/B-V dosim.file 4070100100036
DETECTOR (GELI) For gamma detection 4070100100037
(SCIN) Scintillation layer counter for beta detection 4070100100038
PART-DET (DG) Decay gamma of 237U and 24Na 4070100100039
(B-) Beta-minus of 24Na 4070100100040
SAMPLE Np-oxide placed in thin-walled containers of 10 mm 4070100100041
diameter, 2-3 mm height. Samples weight 140-400 mg. 4070100100042
Np was prepurified from Pu isotopes by a factor of 4070100100043
about 10**5. Background of Pu-236 was within 0.1% of 4070100100044
the induced one. 4070100100045
METHOD (ACTIV,CHSEP) Each sample was irradiated for 80-100 hr.4070100100046
Np-236 decays to Pu-236 by beta(-) emission. 4070100100047
Cross section for Np-237(n,2n)Np-236 reaction was 4070100100048
measured by detection of alpha particle emission 4070100100049
from Pu-236. 4070100100050
After irradiation,Pu-236 was radiochemically separated.4070100100051
For this purpose, Pu-239 was used as tracer and 4070100100052
the cross section was calculated by formula 4070100100053
sigma(n,2n)=A*(n(Pu-236)/n(Pu-239))*(1/(N*f*l*W)) 4070100100054
where 4070100100055
A- Pu-239 activity 4070100100056
n(Pu-236)/n(Pu-239) - ratio of alpha intensities from 4070100100057
Pu-236 and Pu-239 4070100100058
N- number of Np-237 nuclei in the sample 4070100100059
f- neutron flux 4070100100060
l- decay constant for Pu-236 4070100100061
W- beta(-) decay probability for Np-236 = 0.48+-0.01 4070100100062
CORRECTION Correction on neutron flux fluctuations < 10% . 4070100100063
ERR-ANALYS (ERR-T) uncertainty includes: 4070100100064
(ERR-1,,4.) Flux determination 4070100100065
(ERR-2) Uncertainty in the number of Np-237 nuclei 4070100100066
(ERR-3) Uncertainty of Pu-239 activity 4070100100067
(ERR-4,,3.) Uncertainty in the ratio of alpha-particles4070100100068
from Pu-236 and Pu-239 4070100100069
(ERR-5) Error of beta(-) branching ratio 4070100100070
STATUS (APRVD) N.Kornilov, 1984-07-12 4070100100071
Entry 40701 supersedes 30817 . 4070100100072
HISTORY (19840713C) Compiled at CJD . 4070100100073
(20140725S) Entry was restored. 4070100100074
Upper -> lower case correction. 4070100100075
Dates were corrected for 4-digits year. 4070100100076
BIB information was updated. 4070100100077
(20210312U) Subent 002 was corrected. 4070100100078
ENDBIB 76 0 4070100100079
COMMON 3 3 4070100100080
ERR-2 ERR-3 ERR-5 4070100100081
PER-CENT PER-CENT PER-CENT 4070100100082
0.8 1.0 2.0 4070100100083
ENDCOMMON 3 0 4070100100084
ENDSUBENT 83 0 4070100199999
SUBENT 40701002 20210312 41954070100200001
BIB 5 5 4070100200002
REACTION (93-NP-237(N,2N)93-NP-236-M,,SIG) 4070100200003
DECAY-DATA (93-NP-236-M,22.5HR,B-,,0.48) 4070100200004
RAD-DET (94-PU-236,A) 4070100200005
STATUS (TABLE) At.Energy,v.58,is.2,p.117,1985 4070100200006
HISTORY (20210212U) Comma was added in DECAY-DATA 4070100200007
ENDBIB 5 0 4070100200008
COMMON 1 3 4070100200009
ERR-HL 4070100200010
HR 4070100200011
0.4 4070100200012
ENDCOMMON 3 0 4070100200013
DATA 5 7 4070100200014
EN EN-ERR EN-RSL-FW DATA ERR-T 4070100200015
MEV MEV MEV MB MB 4070100200016
7.09 .10 .46 49. 3. 4070100200017
7.47 .10 .50 86. 4. 4070100200018
7.90 .09 .47 123. 7. 4070100200019
8.32 .11 .55 191. 9. 4070100200020
8.90 .11 .56 256. 13. 4070100200021
9.37 .12 .56 338. 13. 4070100200022
9.90 .10 .62 335. 13. 4070100200023
ENDDATA 9 0 4070100200024
ENDSUBENT 23 0 4070100299999
ENDENTRY 2 0 4070199999999