ENTRY 30812 20211005 32023081200000001 SUBENT 30812001 20211005 32023081200100001 BIB 16 74 3081200100002 TITLE Neutron activation cross-sections for Cr isotopes 3081200100003 at 14.6 MeV neutron energy 3081200100004 AUTHOR (I.Ribansky,Ts.Panteleev,L.Stoeva) 3081200100005 INSTITUTE (3SLKSLO) First author 3081200100006 (3BULBLA) Second and third authors 3081200100007 REFERENCE (J,ANE,12,577,1985) 3081200100008 (R,INDC(CSR)-8,1986) Same results for Cr as 3081200100009 Ann.Nuc.En.12,577 3081200100010 (R,INDC(CSR)-6,1985) Superseded by Ann.Nucl.En.12.577 3081200100011 SAMPLE Sample of different isotopic composition were used (see3081200100012 'METHOD'). The samples were prepared by pressing Cr2-O33081200100013 powder into plexiglass container of diameter 16 mm. 3081200100014 Sample thickness varied from 200 to 400 mg/cm2. 3081200100015 The isotopic abundances are given in % 3081200100016 in the following Table. 3081200100017 ------------------------------------ 3081200100018 Sample Isotope 3081200100019 50 52 53 54 3081200100020 ------------------------------------ 3081200100021 natural 4.35 83.79 9.50 2.36 3081200100022 Cr-50 90.5 8.5 0.8 0.2 3081200100023 Cr-52 0.01 99.8 0.19 0.01 3081200100024 Cr-53 0.03 2.19 97.7 0.08 3081200100025 Cr-54 0.13 4.06 2.01 93.8 3081200100026 ------------------------------------ 3081200100027 METHOD (ACTIV) In order to resolve (n,p) and (n,np) cross 3081200100028 sections leading to the same activation product, 3081200100029 samples with different isotopic abundances were used 3081200100030 and the contributing cross section were deduced 3081200100031 using a linear least squares method. 3081200100032 DETECTOR (GELI) Resolution 2.5 keV at 1332 keV 3081200100033 MONITOR (26-FE-56(N,P)25-MN-56,,SIG) 3081200100034 MONIT-REF (20772003,T.B.Ryves,J,MET,14,127,1978) 3081200100035 FACILITY (CCW,3SLKSLO) 3081200100036 INC-SOURCE (D-T) 3081200100037 COVARIANCE Errors of (n,p) and (n,np) cross sections leading to 3081200100038 the same product (deduced from the same activity) are 3081200100039 correlated, their correlation coefficients are given 3081200100040 in the following Table in %. 3081200100041 --------------------------------------------- 3081200100042 (N,p) reaction (n,np) reaction coeff. 3081200100043 --------------------------------------------- 3081200100044 Cr-52(n,p)V-52 Cr-53(n,np)V-52 -14. 3081200100045 Cr-53(n,p)V-53 Cr-54(n,np)V-53 -25. 3081200100046 --------------------------------------------- 3081200100047 CORRECTION Data corrected for 3081200100048 -time variation of neutron flux 3081200100049 -coincidence summing of gamma rays 3081200100050 -self-absorption of gamma rays in the sample 3081200100051 ERR-ANALYS (ERR-T) Total one-sigma error, includes the 3081200100052 following sources of uncertainties (in %): 3081200100053 (ERR-S,0.5,6.) Counting statistics 0.5 - 6.% 3081200100054 (ERR-1) Sample mass 0.1% 3081200100055 (ERR-2) Isotopic abundances 0.2% 3081200100056 (ERR-3,0.,7.8) Gamma-ray intensities 0.0 - 7.8%3081200100057 (ERR-4) Detector efficiency 1.5% 3081200100058 (ERR-5,0.3,3.0) Reaction product half-life 0.3 - 3.0%3081200100059 (ERR-6) Irradiation and counting geometry 0.2% 3081200100060 (ERR-7) Coincidence summing corrections 0.7% 3081200100061 (ERR-8) Gamma-ray self-absorption 0.5% 3081200100062 (ERR-9) Monitor calibration (including 3081200100063 Fe-56(n,p) reference reaction) 2.8% 3081200100064 STATUS (TABLE) Data taken from 3081200100065 Ann.Nucl.Energy,vol.12(1985)577.Tab.3. 3081200100066 Work performed under IAEA Research Agreement 3436/CF 3081200100067 and Interregional Project INT/1/018. 3081200100068 HISTORY (19850605C) DG.- 3081200100069 (19851205A) DG.-Data from R,INDC(CSR)-6 is superseded 3081200100070 by Ann.Nucl.Energy,vol.12(1985).- 3081200100071 (19880516U) DG.-Reference INDC(CSR)-8,8603 added.- 3081200100072 (20090725A) SD:Updated to new date formats,lower case. 3081200100073 Cosmetic changes, codes for partial uncertainties and 3081200100074 data to COMMON section are added. 3081200100075 (20210930A) VS. SF3=X in 005 and 007. 3081200100076 ENDBIB 74 0 3081200100077 COMMON 10 6 3081200100078 EN MONIT MONIT-ERR ERR-1 ERR-2 ERR-4 3081200100079 ERR-6 ERR-7 ERR-8 ERR-9 3081200100080 MEV MB MB PER-CENT PER-CENT PER-CENT 3081200100081 PER-CENT PER-CENT PER-CENT PER-CENT 3081200100082 14.6 109.5 1.1 0.1 0.2 1.5 3081200100083 0.2 0.7 0.5 2.8 3081200100084 ENDCOMMON 6 0 3081200100085 ENDSUBENT 84 0 3081200199999 SUBENT 30812002 20090910 31413081200200001 BIB 2 2 3081200200002 REACTION (24-CR-50(N,2N)24-CR-49,,SIG) 3081200200003 DECAY-DATA (24-CR-49,42.09MIN,DG,90.6,0.542,DG,152.9,0.309) 3081200200004 ENDBIB 2 0 3081200200005 NOCOMMON 0 0 3081200200006 DATA 2 1 3081200200007 DATA ERR-T 3081200200008 MB MB 3081200200009 2.1200E+01 1.2000E+00 3081200200010 ENDDATA 3 0 3081200200011 ENDSUBENT 10 0 3081200299999 SUBENT 30812003 20090910 31413081200300001 BIB 2 2 3081200300002 REACTION (24-CR-52(N,2N)24-CR-51,,SIG) 3081200300003 DECAY-DATA (24-CR-51,27.703D,DG,320.1,0.0985) 3081200300004 ENDBIB 2 0 3081200300005 NOCOMMON 0 0 3081200300006 DATA 2 1 3081200300007 DATA ERR-T 3081200300008 MB MB 3081200300009 3.7500E+02 2.3000E+01 3081200300010 ENDDATA 3 0 3081200300011 ENDSUBENT 10 0 3081200399999 SUBENT 30812004 20090910 31413081200400001 BIB 3 5 3081200400002 REACTION (24-CR-52(N,P)23-V-52,,SIG) 3081200400003 DECAY-DATA (23-V-52,3.760MIN,DG,1434.1,1.0) 3081200400004 STATUS (COREL,30812005) Data measured simultaneously with 3081200400005 (n,np) reaction leading to same product. See 'METHOD' 3081200400006 and 'COVARIANCE'. 3081200400007 ENDBIB 5 0 3081200400008 NOCOMMON 0 0 3081200400009 DATA 2 1 3081200400010 DATA ERR-T 3081200400011 MB MB 3081200400012 7.3400E+01 3.2000E+00 3081200400013 ENDDATA 3 0 3081200400014 ENDSUBENT 13 0 3081200499999 SUBENT 30812005 20211005 32023081200500001 BIB 4 6 3081200500002 REACTION (24-CR-53(N,X)23-V-52,,SIG) 3081200500003 DECAY-DATA (23-V-52,3.760MIN,DG,1434.1,1.0) 3081200500004 STATUS (COREL,30812004) Data measured simultaneously with 3081200500005 (n,p) reaction leading to same product. See 'METHOD' 3081200500006 and 'COVARIANCE'. 3081200500007 HISTORY (20210930A) VS. SF3=X c.f. Memo CP-D/0999. 3081200500008 ENDBIB 6 0 3081200500009 NOCOMMON 0 0 3081200500010 DATA 2 1 3081200500011 DATA ERR-T 3081200500012 MB MB 3081200500013 76. 0.6 3081200500014 ENDDATA 3 0 3081200500015 ENDSUBENT 14 0 3081200599999 SUBENT 30812006 20090910 31413081200600001 BIB 3 5 3081200600002 REACTION (24-CR-53(N,P)23-V-53,,SIG) 3081200600003 DECAY-DATA (23-V-53,1.61MIN,DG,1006.0,0.90) 3081200600004 STATUS (COREL,30812007) Data measured simultaneously with 3081200600005 (n,np) reaction leading to same product. See 'METHOD' 3081200600006 and 'COVARIANCE'. 3081200600007 ENDBIB 5 0 3081200600008 NOCOMMON 0 0 3081200600009 DATA 2 1 3081200600010 DATA ERR-T 3081200600011 MB MB 3081200600012 3.7000E+01 1.6000E+00 3081200600013 ENDDATA 3 0 3081200600014 ENDSUBENT 13 0 3081200699999 SUBENT 30812007 20211005 32023081200700001 BIB 4 6 3081200700002 REACTION (24-CR-54(N,X)23-V-53,,SIG) 3081200700003 DECAY-DATA (23-V-53,1.61MIN,DG,1006.0,0.90) 3081200700004 STATUS (COREL,30812006) Data measured simultaneously with 3081200700005 (n,p) reaction leading to same product. See 'METHOD' 3081200700006 and 'COVARIANCE'. 3081200700007 HISTORY (20210930A) VS. SF3=X c.f. Memo CP-D/0999. 3081200700008 ENDBIB 6 0 3081200700009 NOCOMMON 0 0 3081200700010 DATA 2 1 3081200700011 DATA ERR-T 3081200700012 MB MB 3081200700013 16. 0.2 3081200700014 ENDDATA 3 0 3081200700015 ENDSUBENT 14 0 3081200799999 SUBENT 30812008 20090910 31413081200800001 BIB 2 2 3081200800002 REACTION (24-CR-54(N,P)23-V-54,,SIG) 3081200800003 DECAY-DATA (23-V-54,49.8SEC,DG,834.8,1.0,DG,986.0,0.818) 3081200800004 ENDBIB 2 0 3081200800005 NOCOMMON 0 0 3081200800006 DATA 2 1 3081200800007 DATA ERR-T 3081200800008 MB MB 3081200800009 1.5300E+01 7.0000E-01 3081200800010 ENDDATA 3 0 3081200800011 ENDSUBENT 10 0 3081200899999 SUBENT 30812009 20090910 31413081200900001 BIB 2 2 3081200900002 REACTION (24-CR-54(N,A)22-TI-51,,SIG) 3081200900003 DECAY-DATA (22-TI-51,5.76MIN,DG,319.7,0.934) 3081200900004 ENDBIB 2 0 3081200900005 NOCOMMON 0 0 3081200900006 DATA 2 1 3081200900007 DATA ERR-T 3081200900008 MB MB 3081200900009 1.1000E+01 5.0000E-01 3081200900010 ENDDATA 3 0 3081200900011 ENDSUBENT 10 0 3081200999999 ENDENTRY 9 0 3081299999999