Abstract:The 1992 evaluation of A=57 (92Bh05) has been revised using the experimental decay and reaction data received by the cutoff date noted below. C u t o f f D a t e :S e p t e m b e r 2 4 , 1 9 9 8 . A l l r e f e r e n c e s i n c l u d e d i n t h e N u c l e a r S c i e n c e R e f e r e n c e s ( N S R ) f i l e b y t h i s date have been considered. For neutron reaction data, see the Computer Index of Neutron Data (CINDA) file. General Policies and Organization of Material:See the January issue of Nuclear Data Sheets. Acknowledgments:The author would like to thank the staff of the National Nuclear Data Center for their aid in the preparation of this evaluation.* Work sponsored by the U.S. Department of Energy, under contract no. DE-AC02-98CH10886. 85, 415 (1998) Nuclear Data Sheets Adopted LevelsQ(β -)=13200 SY; S(n)=4000 SY; S(p)=15400 SY; Q(α)=-12000 SY 95Au04. ∆Q(β -)=1200 keV from systematics. ∆S(n)=1000 keV from systematics. ∆S(p)=1100 keV from systematics.∆Q(α)=1000 keV from systematics. 97Be70: 57 Sc activity produced by fragmentation of a 750 MeV/u beam of 238 U on a 9 Be target and subsequent mass separation in the FRS spectrometer. Determined production cross section for 57 Sc. 57 Sc Levels E(level) Comments 0 . 0 %β -=100; %β -n=?Production cross section determined to be 10 nbarns, with a systematic error estimated to be 30%. Adopted Levels∆S(n)=970 keV from systematics. ∆S(p)=1160 keV from systematics.∆Q(α)=1060 keV from systematics.98Am04,95AmZX: 57 Ti activity produced by fragmentation of a 500 MeV/u beam of 86 Kr on a thick 9 Be target and subsequent mass separation in the FRS spectrometer. Measured T 1/2 . 96Do23,95SoZX: activity produced by fragmentation of a 64.5 MeV/u beam of 65 Cu on a 9 Be target and subsequent mass separation in the LISE3 spectrometer. Measured T 1/2 using β and βγ coincidences.90Tu01: activity produced by 800 MeV proton induced fission and fragmentation using natural Th target and subsequent particle analysis with a TOF isochronous spectrometer.85Gu14: activity produced by fragmentation of 33 MeV/u projectiles on thick Ti and Ta targets and subsequent particle analysis with a spectrometer with a charge resolution ∆Z/Z<1.5% and mass resolution ∆A/A<1%. Obtained mass histograms. 98So03,96SoZY,95SoZX: 57 V activity produced by the fragmentation of of 64.5 MeV/u 65 Cu beam impinging on a 9 Be target and subsequent mass separation using the LISE3 spectrometer. Measured T 1/2 from β -singles and β-γ coincidence decay curves. 98Am04,95AmZX,95AmZY: activity produced by the fragmentation of 500MeV/u 86 Kr on a 9 Be target and subsequent mass separation using the FRS spectrometer. Measured T 1/2 . 90Tu01: 57 V activity produced by 800 MeV proton induced fission and fragmentation using natural Th target and subsequent particle analysis with a TOF isochronous spectrometer. V Levels

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The Evaluated Nuclear Structure Data File (ENSDF), is maintained by the National Nuclear Data Center (NNDC) on behalf of the international Nuclear Structure and Decay Data (NSDD) network organized under the auspices of the International Atomic Energy Agency. ENSDF provides evaluated experimental nuclear structure and decay data for basic and applied research. The activities of the NSDD network, the publication of the evaluations, and their use in different applications are described. Since 1986, the ENSDF and related numeric and bibliographic data bases have been made available for on-line access. The current status of these data bases, and future plans to improve the on-line access to their contents are discussed.(evaluated nuclear structure data, nuclear structure references, evaluated nuclear reaction data, on-line access)

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