ENTRY 30272 20100303 31443027200000001 SUBENT 30272001 20100303 31443027200100001 BIB 11 18 3027200100002 INSTITUTE (3POLIPJ) 3027200100003 REFERENCE (J,APP,35,187,1969) Alpha spectrum,graph only 3027200100004 (J,APP,34,173,1968) Superseded by Acta Phys.Pol. 35 3027200100005 AUTHOR (J.Chwaszczewska,M.Dakowski,T.Krogulski,E.Piasecki, 3027200100006 M.Sowinski,A.Stegner,J.Tys) 3027200100007 TITLE Low energy part of the alpha particle spectrum from 3027200100008 tripartition of U-235 3027200100009 EXP-YEAR (1968) 3027200100010 INC-SOURCE (REAC) Reactor 3027200100011 INC-SPECT Thermal spectrum 3027200100012 DETECTOR (TELES,PROPC,SI) Counter telescope with a proportional 3027200100013 counter and a Si-Au detector 3027200100014 PART-DET (A) Alphas 3027200100015 STATUS (TABLE) Data taken from Acta Phys.Pol. 35,187 3027200100016 HISTORY (19740822T) YR. Converted from Exfor 70033 3027200100017 (20080423A) BIB section updated 3027200100018 (20100303A) SD: REACTION codes in Subent 003, 004 were 3027200100019 changed according to EXFOR rules. 3027200100020 ENDBIB 18 0 3027200100021 COMMON 1 3 3027200100022 EN-DUMMY 3027200100023 EV 3027200100024 2.5300E-02 3027200100025 ENDCOMMON 3 0 3027200100026 ENDSUBENT 25 0 3027200199999 SUBENT 30272002 20081203 31323027200200001 BIB 3 14 3027200200002 REACTION (92-U-235(N,A)90-TH-232,PAR,SIG,,MXW) 3027200200003 Partial (n,alpha) cross-section 3027200200004 METHOD The estimation of the upper limit of (n,alpha) sigma 3027200200005 was done by superimposing the expected alpha peaks at 3027200200006 appropriate places in the measured alpha spectrum. 3027200200007 Their widths were chosen taking into account the self- 3027200200008 absorption in the target layer and the straggling in 3027200200009 the aluminium foil. Sigma was deduced from the ratio of3027200200010 areas under the indicated profiles and the measured 3027200200011 spectrum. 3027200200012 FLAG (1.) for transition to the ground state the alpha 3027200200013 energy is 10.7 MeV. 3027200200014 (2.) for transition to the excited states up to 5 MeV 3027200200015 the alpha energy is less than 10.7 MeV 3027200200016 ENDBIB 14 0 3027200200017 NOCOMMON 0 0 3027200200018 DATA 4 2 3027200200019 E-LVL E-LVL-MAX DATA-MAX FLAG 3027200200020 MEV MEV MB NO-DIM 3027200200021 0.0000E+00 3.0000E+00 1. 3027200200022 5.0000E+00 2.0000E+00 2. 3027200200023 ENDDATA 4 0 3027200200024 ENDSUBENT 23 0 3027200299999 SUBENT 30272003 20100303 31443027200300001 BIB 4 9 3027200300002 REACTION (92-U-235(N,F)2-HE-4,TER,FY/DE,,MXW/REL) 3027200300003 Fission alpha spectrum 3027200300004 STATUS (CURVE) Figure 1 3027200300005 ERR-ANALYS (E-ERR-DIG) Digitizing error of alpha energy 3027200300006 (ERR-DIG) Digitizing error of data 3027200300007 (DATA-ERR) nothing said about uncertainties 3027200300008 HISTORY (20081216A) NODATA replaced by digitized data 3027200300009 (20100303A) SD: REACTION codes were changed 3027200300010 according to EXFOR rules. 3027200300011 ENDBIB 9 0 3027200300012 COMMON 2 3 3027200300013 E-ERR-DIG ERR-DIG 3027200300014 MEV ARB-UNITS 3027200300015 0.93324E-01 24.680 3027200300016 ENDCOMMON 3 0 3027200300017 DATA 3 24 3027200300018 E DATA DATA-ERR 3027200300019 MEV ARB-UNITS ARB-UNITS 3027200300020 5.5635 798.74 3027200300021 6.0005 995.31 3027200300022 6.5158 1205.6 3027200300023 7.0255 1510.0 3027200300024 7.6148 1808.0 3027200300025 8.0449 2118.8 3027200300026 8.6342 2416.7 3027200300027 9.1244 2606.8 3027200300028 9.5757 3005.0 3027200300029 10.080 3403.4 80.616 3027200300030 10.563 3714.4 3027200300031 11.040 4112.7 3027200300032 11.559 4699.4 3027200300033 11.984 5104.2 3027200300034 12.561 5597.0 3027200300035 13.024 5807.1 3027200300036 13.574 6313.2 3027200300037 14.116 6516.9 3027200300038 14.621 6908.6 3027200300039 15.072 7300.1 3027200300040 15.542 7389.3 3027200300041 16.070 7398.1 87.334 3027200300042 16.556 7218.6 3027200300043 17.044 7012.2 3027200300044 ENDDATA 26 0 3027200300045 ENDSUBENT 44 0 3027200399999 SUBENT 30272004 20100303 31443027200400001 BIB 4 12 3027200400002 REACTION 1(92-U-235(N,F)2-HE-4,TER,KEP,,MXW) fit betw. 6 to 17.5 3027200400003 2(92-U-235(N,F)2-HE-4,TER,KE,,MXW) fit betw. 10 to 17.5 3027200400004 Fission alpha spectrum 3027200400005 ANALYSIS The alpha spectrum was fitted by a Gaussian 3027200400006 distribution yielding the following parameters = 3027200400007 Fit interval Most probable FWHM 3027200400008 (MeV) energy (MeV) (MeV) 3027200400009 6 to 17.5 16.2+-0.5 12+-1 3027200400010 10 to 17.5 15.7+-0.5 11+-1 3027200400011 STATUS (DEP,30272003) 3027200400012 HISTORY (20100303A) SD: REACTION codes were changed 3027200400013 according to EXFOR rules. 3027200400014 ENDBIB 12 0 3027200400015 COMMON 1 3 3027200400016 DATA-ERR 3027200400017 MEV 3027200400018 0.5 3027200400019 ENDCOMMON 3 0 3027200400020 DATA 2 1 3027200400021 DATA 1DATA 2 3027200400022 MEV MEV 3027200400023 16.2 15.7 3027200400024 ENDDATA 3 0 3027200400025 ENDSUBENT 24 0 3027200499999 ENDENTRY 4 0 3027299999999