ENTRY M0937 20170605 M089M093700000001 SUBENT M0937001 20170605 M089M093700100001 BIB 7 10 M093700100002 TITLE Reliability of (gamma,1n), (g,2n), and (g,3n) M093700100003 cross-section data on 159Tb. M093700100004 AUTHOR (V.V.Varlamov,B.S.Ishkhanov,V.N.Orlin) M093700100005 REFERENCE (J,PR/C,95,054607,2017) M093700100006 #doi:10.1103/PhysRevC.95.054607 M093700100007 INSTITUTE (4RUSMOS) M093700100008 INC-SOURCE (QMPH,ARAD) M093700100009 STATUS (TABLE,APRVD) Approved by V.Varlamov. M093700100010 HISTORY (20170605C) Data were compiled at the Russia MSU SINP M093700100011 CDFE by V.Varlamov. M093700100012 ENDBIB 10 0 M093700100013 NOCOMMON 0 0 M093700100014 ENDSUBENT 13 0 M093700199999 SUBENT M0937004 20170605 M089M093700400001 BIB 5 49 M093700400002 REACTION (65-TB-159(G,3N)65-TB-156,,SIG,,,EVAL) M093700400003 ANALYSIS The new data for the partial reaction (g,3n) cross M093700400004 section on 159Tb were estimated on the base of the M093700400005 experimental (g,2n) reaction cross section obtained M093700400006 in the energy range above the threshold B3n of the M093700400007 reaction (g,3n) in discrepancy with the objective M093700400008 physical data reliability criteria: M093700400009 F1 = SIG(g,1n)/SIG(g,Sn), M093700400010 F2 = SIG(g,2n)/SIG(g,Sn), M093700400011 F3 = SIG(g,3n)/SIG(g,Sn), M093700400012 where SIG(g,Sn)=SIG(g,1n)+2SIG(g,2n)+3SIG(g,3n). M093700400013 In accordance with definition: M093700400014 F1 must be smaller than 1.00; M093700400015 F2 must be smaller than 0.50; M093700400016 F3 must be smaller than 0.33. M093700400017 At energies above the (g,3n) reaction threshold B3n M093700400018 = 23.66 MeV this cross section was not obtained M093700400019 experimentally at all but the estimated SIGest(g,3n) M093700400020 can be naturally described using the expression for M093700400021 the neutron yield reaction cross section: M093700400022 SIGexp(g,Sn) = 2SIGexp(g,2n) = M093700400023 SIGeval(g,1n)+2SIGeval(g,2n)+3SIGest(g,3n), M093700400024 where SIGeval(g,1n) and SIGeval(g,2n) were evaluated M093700400025 using the experimental-theoretical method and the M093700400026 data reliability criteria F1-3: M093700400027 The new data for (g,3n) cross section undetermined M093700400028 before were estimated using the following equation: M093700400029 SIGest(g,3n) = 2/3[SIGexp(g,2n)-SIGeval(g,2n)- M093700400030 1/3SIGtheor(g,1n). M093700400031 ERR-ANALYS (DATA-ERR) Root-mean-square errors. M093700400032 REL-REF (R,L0005005,R.L.Bramblett+,J,PR,133,B869,1964) M093700400033 Experimental data for the total partial neutron M093700400034 reaction (g,2n) cross section not satisfied the M093700400035 data reliability criteria. M093700400036 (R,M0831003,V.V.Varlamov+,J,EPJ/A,50,114,2014) M093700400037 Cross section for (g,2n) reaction evaluated using M093700400038 the experimental-theoretical method, based on the M093700400039 data reliability criteria and the equations of the M093700400040 combined model of photonuclear reactions. M093700400041 (E,,B.S.Ishkhanov+,J,YF,71,517,2008) M093700400042 The theoretical preequilibrium combined model of M093700400043 photonuclear reactions based on the Fermi gas M093700400044 densities used for SIGtheor(g,1n) calculation. M093700400045 STATUS (DEP,L0005005) M093700400046 The experimental cross section for 159Tb(g,3n) M093700400047 reaction. M093700400048 (DEP,M0831003) Evaluated cross sections for the M093700400049 reaction 159Tb(g,2n). M093700400050 Data presented in Fig. 3. M093700400051 ENDBIB 49 0 M093700400052 NOCOMMON 0 0 M093700400053 DATA 3 10 M093700400054 EN DATA DATA-ERR M093700400055 MEV MB MB M093700400056 24.026 3.404 2.830 M093700400057 24.448 5.319 2.553 M093700400058 24.841 7.766 2.660 M093700400059 25.263 10.960 2.872 M093700400060 25.751 15.319 2.957 M093700400061 26.078 18.298 3.191 M093700400062 26.469 20.638 2.809 M093700400063 26.850 21.489 2.664 M093700400064 27.269 21.064 4.558 M093700400065 27.677 20.213 3.298 M093700400066 ENDDATA 12 0 M093700400067 ENDSUBENT 66 0 M093700499999 ENDENTRY 2 0 M093799999999