ENTRY 21007 20131222 22382100700000001 SUBENT 21007001 20131222 22382100700100001 BIB 14 53 2100700100002 INSTITUTE (2GERKLN) Institut fuer Kernchemie. 2100700100003 REFERENCE (P,NEANDC(E)-192/U,(5),67,197804) Data redetermination.2100700100004 (J,RCA,18,207,1972) The same data; full report. 2100700100005 AUTHOR (R.Woelfle,W.Herr,U.Herpers) 2100700100006 TITLE Activation cross section sigma-therm and half-life 2100700100007 of 53-Mn 2100700100008 FACILITY (REAC,2GERKLN) 2100700100009 INC-SOURCE (REAC) Average flux for 587 days irradiation 2100700100010 ('Long term'): 1.093 x 10**14 +- 3% n/cm2/s. 2100700100011 Average flux for 19.6 days irradiation 2100700100012 ('Short term'): 1.805 x 10**14 +- 5% n/cm2/s. 2100700100013 INC-SPECT Thermal Maxwellian flux. 2100700100014 SAMPLE 2 mg of meteoritic manganese extracted from about 2100700100015 20 grams of the iron meteorite "Duchesne" and 2100700100016 containing 6.5 dpm 53Mn were purified by paper chroma-2100700100017 tography, ashed and dissolved in dilute HN03 + H202. 2100700100018 The Mn solution was then homogenized with 2.3 mg of 2100700100019 high purity ZnO (65Zn as internal standard) and 2100700100020 285 mg MgO. 2100700100021 The composition of the meteoritic Mn-samples: 2100700100022 'Long term' irradiation: 2100700100023 53Mn - 0.00019 mu-g; 55Mn - 230.5 mu-g; 2100700100024 Zn - 216.0 mu-g; Mg - 19.70 mg 2100700100025 'Short term' irradiation: 2100700100026 53Mn - 0.000208 mu-g; 55Mn - 253.3 mu-g; 2100700100027 Zn - 237.4 mu-g; Mg - 21.65 mg. 2100700100028 Amounts of each 35 mg oxide-mixture were enclosed in 2100700100029 quartz ampoules (diam. = 6 mm; 25 mm long). Two of 2100700100030 these ampoules were used for the 'Long' term reactor 2100700100031 irradiation, a third one for the short (20 d) 2100700100032 irradiation. 2100700100033 METHOD (ACTIV) 2100700100034 DETECTOR (NAICR) The 54.Mn was counted in a NaI(TI) detector 2100700100035 2 x 2 inch. by its 0.835 MeV-gamma-line. The yield of 2100700100036 55Mn was determined by neutron activation via 56Mn by 2100700100037 its 0.847 keV-line. 2100700100038 The 65Zn activity was determined by its 2100700100039 1.12 MeV-gamma-line in a large distance of 33 cm by a 2100700100040 2 x 2 inch NaI(TI) detector. 2100700100041 (GELI) In order to increase the security, aliquots were2100700100042 counted with a 30 cc Ge(Li)detector independently. 2100700100043 The Mn and Fe standards were treated in the same way. 2100700100044 MONITOR (30-ZN-64(N,G)30-ZN-65,,SIG,,MXW) - flux monitor 2100700100045 DECAY-MON (30-ZN-65,245.D) 2100700100046 STATUS (TABLE) .Data taken from NEANDC(E)-192. 2100700100047 HISTORY (19790718C) WWO. 2100700100048 (19790827E) 2100700100049 (20131222A) SD: Updated to new date formats,lower case.2100700100050 Corrections according last EXFOR rules and Dict. 2100700100051 REACTION code was corrected in Subent 002. 2100700100052 Ref. corrected: RCA,18,,207 -> RCA,18,207; 2100700100053 NEANDC(E)-192/U,5,67, -> NEANDC(E)-192/U,(5),67, 2100700100054 BIB updated (DETECTOR was added). 2100700100055 ENDBIB 53 0 2100700100056 NOCOMMON 0 0 2100700100057 ENDSUBENT 56 0 2100700199999 SUBENT 21007002 20131222 22382100700200001 BIB 3 6 2100700200002 REACTION (25-MN-53(N,G)25-MN-54,,SIG,,MXW) 2100700200003 DECAY-DATA (25-MN-53,3.9E+06YR) 2100700200004 (25-MN-54,308.D) 2100700200005 .Measured Mn-53 half-life. Error =0.6 x 10**5 yr. 2100700200006 HISTORY (20131222A) SD: SF1=Mn-52 -> Mn-53; SF4=Mn-53 -> Mn-54 2100700200007 in REACTION code 2100700200008 ENDBIB 6 0 2100700200009 NOCOMMON 0 0 2100700200010 DATA 3 1 2100700200011 EN-DUMMY DATA DATA-ERR 2100700200012 EV B B 2100700200013 2.5000E-02 6.6000E+01 7.0000E+00 2100700200014 ENDDATA 3 0 2100700200015 ENDSUBENT 14 0 2100700299999 ENDENTRY 2 0 2100799999999