ENTRY 21822 20190129 22742182200000001 SUBENT 21822001 20190129 22742182200100001 BIB 14 53 2182200100002 TITLE Ternary fission of U-233,U-235,Np-237 and 2182200100003 Pu-239 induced by thermal neutrons 2182200100004 AUTHOR (P.D'Hondt) 2182200100005 FACILITY (REAC,2FR ILL) 87 m curved neutron guide of the 2182200100006 high flux reactor. Flux 10.**8 n/cm**2/sec, 2182200100007 cadmium ratio 10.**6, gamma background reduced 2182200100008 by a factor of 10.**6. 2182200100009 INSTITUTE (2FR ILL) Experimental site. 2182200100010 (2BLGGHT) P.D. 2182200100011 REFERENCE (T,D'HONDT,1981) Description of experiment. (In Dutch) 2182200100012 (C,82ANTWER,,147,1982) - Data were presented. 2182200100013 In this Entry only data of reaction (n,f) on U-233, 2182200100014 Np-237, Pu-239 presented. Other data presented in: 2182200100015 REL-REF (O,21705001,P.D'Hondt+,J,NP/A,346,(3),461,1980) - data 2182200100016 for U-235(n,f) presented 2182200100017 (O,21820001,P.D'Hondt+,C,82ANTWER,,147,1982) data of 2182200100018 V-50(n,p); (n,alpha) reaction on Zn-65; Mo-95,97; 2182200100019 Ru-101; Pd-105; Cd-113; Sn-115 presented. 2182200100020 (O,21724001,C.Wagemans+,J,NP/A,362,(1),1,1981) - data 2182200100021 for U-233(n,f); reaction (n,alpha) on U-233,235,238; 2182200100022 Th-232; Pu-239 presented. 2182200100023 INC-SOURCE (REAC) 2182200100024 INC-SPECT Thermal Maxwellian spectrum from HFR. 2182200100025 METHOD (EDE) Measurement of binary and ternary 2182200100026 events by a telescope detector without 2182200100027 using a coincidence. 2182200100028 DETECTOR (TELES,SIBAR,SIBAR) Telescope consisting of an E- and 2182200100029 a dE- detector. The dE-detector was a Si(Au) surface 2182200100030 barrier with a depleted zone of 26.7 microns 2182200100031 thickness, a surface of 300. mm**2 and a resolution 2182200100032 FWHM for the 5.486 MeV alpha-line of Am-241 of 35 keV.2182200100033 The E-detector had a depleted zone of 500 microns, 2182200100034 a surface of 450 mm**2, and a resolution of 40. keV. 2182200100035 It was also a Si(Au) surface barrier detector. 2182200100036 COMMENT .With this thickness of the dE-detector the signal for 2182200100037 the Z=1 ternary particles is completely different 2182200100038 from the one for the alpha particles which allows 2182200100039 thus still particle identification. 2182200100040 .Differences with formerly reported values are 2182200100041 explained by the extrapolation to the lower energies 2182200100042 of the alpha particle spectra which deviate 2182200100043 from a Gaussian. 2182200100044 CORRECTION .In some cases the telescope was shielded with an 2182200100045 Al-absorber of 20 microns thickness in order to reduce2182200100046 the damage by the fission fragment bombardment. 2182200100047 ERR-ANALYS (DATA-ERR) Total error, no further details given. 2182200100048 HISTORY (19830120C) G.C. 2182200100049 (20180311A) SD:Updated to new date formats,lower case. 2182200100050 Small update. Comma in ref. 82ANTWER was added. 2182200100051 Data were update according to presentation in the Table2182200100052 ERR-T -> DATA-ERR in all Subents. 2182200100053 (20190129A) SD: Derived data were changed on measured 2182200100054 data from the same table in Subents 002-004. 2182200100055 ENDBIB 53 0 2182200100056 COMMON 1 3 2182200100057 EN-DUMMY 2182200100058 EV 2182200100059 2.5300E-02 2182200100060 ENDCOMMON 3 0 2182200100061 ENDSUBENT 60 0 2182200199999 SUBENT 21822002 20190129 22742182200200001 BIB 4 11 2182200200002 REACTION (92-U-233(N,F)2-HE-4,BIN/TER,FY/RAT,,MXW) 2182200200003 SAMPLE U-F(4) evaporated onto an Al-backing. It contained 2182200200004 99.76% U-233, and had a thickness of 4.6 micrograms/cm22182200200005 it was not shielded with an Al-absorber. 2182200200006 STATUS (TABLE) table 1 of 82ANTWER,147,1982 2182200200007 HISTORY (20180311A) SD: SF4=He-4 added, SF7=A deleted from 2182200200008 REACTION code. ERR-T -> DATA-ERR. 2182200200009 (20190129A) SD: Derived data were changed on measured 2182200200010 data => units B -> NO-DIM and in REACTION code 2182200200011 SF5=TER->BIN/TER added; SF6=SIG -> FY/RAT. COMMENT, 2182200200012 MONITOR deleted. 2182200200013 ENDBIB 11 0 2182200200014 NOCOMMON 0 0 2182200200015 DATA 2 1 2182200200016 DATA DATA-ERR 2182200200017 NO-DIM NO-DIM 2182200200018 461. 15. 2182200200019 ENDDATA 3 0 2182200200020 ENDSUBENT 19 0 2182200299999 SUBENT 21822003 20190129 22742182200300001 BIB 4 13 2182200300002 REACTION (93-NP-237(N,F)2-HE-4,BIN/TER,FY/RAT,,MXW) 2182200300003 SAMPLE Np-F(4) layer evaporated onto a Mylar backing. It 2182200300004 contained 99.99% Np-237 and less than 1ppm U-235 and 2182200300005 Pu-239. its thickness was 382.0 micrograms/cm**2. It 2182200300006 was shielded with an aluminium absorber of 20 microns 2182200300007 thickness. 2182200300008 STATUS (TABLE) table 1 of 82ANTWER,147,1982 2182200300009 HISTORY (20180311A) SD: SF4=He-4 added, SF7=A deleted from 2182200300010 REACTION code. ERR-T -> DATA-ERR. 2182200300011 (20190129A) SD: Derived data were changed on measured 2182200300012 data => units B -> NO-DIM and in REACTION code 2182200300013 SF5=TER->BIN/TER added; SF6=SIG -> FY/RAT. COMMENT, 2182200300014 MONITOR deleted. 2182200300015 ENDBIB 13 0 2182200300016 NOCOMMON 0 0 2182200300017 DATA 2 1 2182200300018 DATA DATA-ERR 2182200300019 NO-DIM NO-DIM 2182200300020 493. 20. 2182200300021 ENDDATA 3 0 2182200300022 ENDSUBENT 21 0 2182200399999 SUBENT 21822004 20190129 22742182200400001 BIB 4 13 2182200400002 REACTION (94-PU-239(N,F)2-HE-4,BIN/TER,FY/RAT,,MXW) 2182200400003 SAMPLE Produced by electrospraying of Pu-acetate onto a 2182200400004 Mylar backing. It contained 99.956% Pu-239. Its 2182200400005 thickness was 5.0 micrograms/cm**2. Two experiments 2182200400006 were done, one with the detector shielded with a 2182200400007 20 microns thick Al-foil, and one without such a foil. 2182200400008 STATUS (TABLE) table 1 of 82ANTWER,147,1982 2182200400009 HISTORY (20180311A) SD: SF4=He-4 added, SF7=A deleted from 2182200400010 REACTION code. ERR-T -> DATA-ERR. 2182200400011 (20190129A) SD: Derived data were changed on measured 2182200400012 data => units B -> NO-DIM and in REACTION code 2182200400013 SF5=TER->BIN/TER added; SF6=SIG -> FY/RAT. COMMENT, 2182200400014 MONITOR deleted. 2182200400015 ENDBIB 13 0 2182200400016 NOCOMMON 0 0 2182200400017 DATA 2 1 2182200400018 DATA DATA-ERR 2182200400019 NO-DIM NO-DIM 2182200400020 450. 15. 2182200400021 ENDDATA 3 0 2182200400022 ENDSUBENT 21 0 2182200499999 ENDENTRY 4 0 2182299999999