ENTRY B0138 20011220 0000B013800000001 SUBENT B0138001 20011220 0000B013800100001 BIB 14 42 B013800100002 TITLE The Gt Matrix Elements in the Decay of the Mirror B013800100003 Nuclei Cr-47, Fe-51 and Ni-55. B013800100004 AUTHOR (P.HORNSHOJ, L.HOJSHOLT-POULSEN, N.RUD) B013800100005 INSTITUTE (2DENAAU) B013800100006 REFERENCE (J,NP/A,288,429,1977) B013800100007 FACILITY (VDGT,2DENAAU) B013800100008 METHOD (EXTB,SITA,BCINT) B013800100009 (ACTIV) A Slow Beam-Pulsing System was Used to Provide B013800100010 Activation Periods of 0.5 Sec Followed by 4 Sec B013800100011 Measuring Intervals. Slowly Decaying Activities were B013800100012 Investigated with Correspondingly Longer Measuring B013800100013 Periods. B013800100014 DETECTOR (SCIN). Plastic Scintillator. B013800100015 ERR-ANALYS (DATA-ERR) No Specified Information About Errors is B013800100016 Given. Errors Quoted in the Data Section are Within B013800100017 10-35%. The Significance of these Errors is Uncertain.B013800100018 COMMENT Due to the Large Range of the High-Energy Positrons B013800100019 The Determination of the Effective Solid Angle was B013800100020 Difficult. Thus, the Absolute Cross Sections are B013800100021 Assumed by the Authors to be Less Precise Than the B013800100022 Relative Ones. B013800100023 ANALYSIS To Avoid Activities Created by Activation of Very B013800100024 Small Contaminations (ABOUT 1%% EACH) Of Al, Si and CaB013800100025 Present in the Target, Only Those Sections of the B+ B013800100026 Spectrum were Analysed, Where the Product Nuclei were B013800100027 Strongly Dominating. B013800100028 ADD-RES (DECAY) B013800100029 Three New Mirror Nuclei, Cr-47, Fe-51, Ni-55 have Been B013800100030 Identified in (HE-3,2N) Reactions. Half-Lives, Log-Ft B013800100031 Values and Gamow-Teller Matrix Elements For the Mirror B013800100032 Beta-Decays were Deduced. B013800100033 For Cr-47, However, No Cross Sections were Published. B013800100034 MISC-COL (MISC) C.M.-Energies As Given by the Authors. The B013800100035 Lab-Energies were Calculated by the Compiler of B013800100036 Kachapag. B013800100037 STATUS (CURVE) By Kachapag. B013800100038 HISTORY (19800430C)Nekw B013800100039 (19940719A) Some Corrections have Been Included by B013800100040 CAJAD B013800100041 (19981224A) Method is Corrected. Reaction Lines are B013800100042 Corrected. Converted to Lower Case. B013800100043 (20011010U) Last checking has been done. B013800100044 ENDBIB 42 0 B013800100045 NOCOMMON 0 0 B013800100046 ENDSUBENT 45 0 B013800199999 SUBENT B0138002 20011220 0000B013800200001 BIB 4 12 B013800200002 REACTION (26-FE-54(HE3,2N)28-NI-55,,SIG,,,EXP) B01B013800200003 In the Energy-Range 12.0 to 15.34 MeV this is the Only B013800200004 Reaction to Produce a Short-Lived Activity with High B013800200005 Energy Positrons. B013800200006 RAD-DET (28-NI-55,B+) B013800200007 DECAY-DATA (28-NI-55,0.189SEC,B+) B013800200008 From Decay Curve Analysis a Till Now Unknown Half-Life B013800200009 Of 189 +- 5 Msec was Found. B013800200010 SAMPLE Self-Supporting Metallic Foils, Thickness About B013800200011 2 Mg/Cm**2. The Target Foils Consisted of Fe-54 B013800200012 (97.4%), Fe-56 (2.21%), Fe-57 (0.09%), Fe-58 (0.32%), B013800200013 Si (<0.3%), Ca (<0.3%), Al (<0.1%) And Ti (<0.02%). B013800200014 ENDBIB 12 0 B013800200015 NOCOMMON 0 0 B013800200016 DATA 4 7 B013800200017 EN DATA DATA-ERR MISC B013800200018 MEV MB MB MEV B013800200019 12.2 0.03 0.011 11.5 B013800200020 12.7 0.05 0.013 12. B013800200021 13. 0.066 0.015 12.3 B013800200022 13.4 0.14 0.013 12.7 B013800200023 14. 0.33 0.019 13.2 B013800200024 14.5 0.7 0.011 13.7 B013800200025 15. 1.13 0.025 14.2 B013800200026 ENDDATA 9 0 B013800200027 ENDSUBENT 26 0 B013800299999 SUBENT B0138003 20011220 0000B013800300001 BIB 4 10 B013800300002 REACTION (24-CR-50(HE3,2N)26-FE-51,,SIG,,,EXP) B013800300003 RAD-DET (26-FE-51,B+) B013800300004 DECAY-DATA (26-FE-51,0.245SEC,B+) B013800300005 From Decay Curve Analysis a Till Now Unknown Half-Life B013800300006 Of 245 +- 7 Msec was Found. B013800300007 SAMPLE Self-Supporting Metallic Foils, Thickness About B013800300008 2 Mg/Cm**2. The Target Foils Consisted of Cr-50 B013800300009 (95.9%), Cr-52 (3.76%), Cr-53 (0.26%), Cr-54 (0.05%), B013800300010 Molecular Oxygen (2+- 0.4%), Si (<0.3%), Ca (<0.1%) B013800300011 And Fe (<0.05%). B013800300012 ENDBIB 10 0 B013800300013 NOCOMMON 0 0 B013800300014 DATA 4 7 B013800300015 EN DATA DATA-ERR MISC B013800300016 MEV MB MB MEV B013800300017 11.7 0.031 0.011 11. B013800300018 12.1 0.054 0.013 11.4 B013800300019 12.6 0.1 0.013 11.8 B013800300020 12.9 0.13 0.02 12.1 B013800300021 13.4 0.34 0.018 12.6 B013800300022 13.9 0.56 0.034 13. B013800300023 14.4 1.13 0.014 13.6 B013800300024 ENDDATA 9 0 B013800300025 ENDSUBENT 24 0 B013800399999 ENDENTRY 3 0 B013899999999