IAEA Coordinated Research Project for
Development of a Database for Prompt Gamma-Ray Neutron Activation Analysis

Data for Hf Isotopes (Z=72)
IsotopeAbundanceSigma(old) Sigma(new)Data Intensity Balances Energy Fit
174Hf0.16 1 %549 7 b * 411 7 b ENSDFBudapest ENSDF ENSDF
ReferencesComments:Normalized to 126 (Budapest), corrected for 178Hf, 569 24 mb (De Corte). * Updated (2003)
Final adopted data , Intensity balance , Energy/Intensity Fit
176Hf5.26 7 %24 3 b 24.8 15 b ENSDFBudapest ENSDFBudapest ENSDFBudapest
ReferencesComments:
Final adopted data , Intensity balance , Energy/Intensity Fit
177Hf18.60 9 %373 10 b 450 30 b ENSDFBudapest ENSDFBudapest ENSDFBudapest
ReferencesComments: 810 180 mb (to 1147), 960 50 mb(to 1147, Mughabghab); 0.2 1 mb(to 2446, Mughabghab)
Final adopted data , Intensity balance , Energy/Intensity Fit
178Hf27.28 7 %84 4 b 105 5 b ENSDFBudapest ENSDFBudapest ENSDFBudapest
ReferencesComments: 53 6 (to 375, Mughabghab), 69 4 b (to 375)
IT Decay (18.7 s) Problem with intensity balance.
Final adopted data , Intensity balance , Energy/Intensity Fit
179Hf13.629 6 %41 3 b 39.2 21 b ENSDFBudapest ENSDFBudapest ENSDFBudapest
ReferencesComments: 445 3 mb(to 1142, Mughabghab), 450 6 mb(to 1142, De Corte)
Final adopted data , Intensity balance , Energy/Intensity Fit
180Hf35.08 16 %13.04 7 b 12.2 13 b ENSDFBudapest ENSDFBudapest ENSDFBudapest
ReferencesComments: 13.6 2 b (De Corte), 12.3 4 b 1997Ka47
Final adopted data , Intensity balance , Energy/Intensity Fit

Comparison of ENSDF and Budapest Gamma-Ray Data

Final Comparison of Adopted Data, Budapest, and Lone.

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For more information contact

Richard B. Firestone, e-mail: rbf@lbl.gov
 Ernest O. Lawrence Berkeley National Laboratory
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