Nuclear Data Recycling Using NuDat Programs

Explore the use of NuDat classes in plotting beta-minus decay half-lives, electron capture processes, reliable ECp values, and antineutrino spectra calculations. Delve into topics like cross-section spectra, thermal fission yields, and the decay of various nuclides. The research also discusses assumptions made for proton energies and scatter on plots due to Z values.

• Nuclear Data
• NuDat Programs
• Beta Decay
• Electron Capture
• Antineutrino Spectra

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1. Recycling NuDat Programs A.A. Sonzogni, T.D. Johnson, E.A. McCutchan, National Nuclear Data Center Brookhaven National Laboratory Building 817 Upton, NY 11973-5000 www.nndc.bnl.gov

2. Using NuDat classes to plot beta-minus T1/2 Kratz-Hermann systematics NSDD 2015 #2 - Alejandro Sonzogni

3. Using NuDat classes to plot EC T1/2 Same J decays, ex. 25Al 25Mg 0+ to 0+ OO decays, ex. 34Cl 34S Problem in ENSDF? NSDD 2015 #3 - Alejandro Sonzogni

4. We will query ENSDF to obtain reliable ECp values to plot Pp/T1/2 Z=14, 20 Z=4 7 63 cases, with Z=14-80 Scatter on the plot is mainly due to Z, which the proton is sensitive to NSDD 2015 #4 - Alejandro Sonzogni

5. A better assumption would be to assume that Pp= T(Ep) dEp, where T(Ep)=(1+exp( (Vb-Ep) )-1, and Vb=1.44 Z/Ro A1/3 NSDD 2015 #5 - Alejandro Sonzogni

6. Recent Antineutrino Spectra Calculations No adjustable parameters Phys. Rev. C 91, 011301(R) (2015) For energies > 5 MeV, the electron and antineutrino spectra are mainly due to about 20 nuclides The decay of these nuclides is of great interest NSDD 2015 #6 - Alejandro Sonzogni

7. + p n + e+ cross section integrated spectra Target Delayed neutron multiplicity/fission 4.4E-2 1.59E-2 1.62E-2 6.45E-3 238U 235U 241Pu 239Pu The integral of antineutrino multiplicity has a similar behavior as the delayed neutron multiplicity. NSDD 2015 #7 - Alejandro Sonzogni

8. 235U thermal fission yields 235U thermal Yi/< I> Yi=CFYi (e)I i(e) < I>= Yi NSDD 2015 #8 - Alejandro Sonzogni

9. 239Pu thermal Yi/< I> 238U fast Yi/< I> NSDD 2015 #9 - Alejandro Sonzogni

10. Systematics of < I> with (3Z-A) LFF: Light fission fragments ( Z<47) HFF: Heavy Fission Fragments (Z >= 47) EE: Even-Z, Even-N EO: Even-Z, Odd-N OE: Odd-Z, Even-N OO: Odd-Z, Odd-N NSDD 2015 #10 - Alejandro Sonzogni

11. Next workshop on Modeling of Antineutrino Flux from Nuclear Reactors June 2016 Port Jefferson or BNL Tentatively Tuesday 6/14 Thursday 6/16, 2016 1st workshop took place at the INT, Seattle, 11/2013 2nd workshop SUBATECH, Nantes, 01/2015 NSDD 2015 #11 - Alejandro Sonzogni

12. Relation to decay heat 235U Thermal NSDD 2015 #12 - Alejandro Sonzogni

13. 92Rb, 100Nb, 96Y, 101Nb,102Nb 235U Thermal NSDD 2015 #13 - Alejandro Sonzogni

14. Conclusions The data in ENSDF is the foundation for nuclear reactor antineutrino spectra and decay heat calculations. Many of the JAVA classes developed for NuDat have been used to calculate and plot these quantities as well as beta delayed neutron emitter properties. Some of these classes are also part of EVP and Sigma. NSDD 2015 #14 - Alejandro Sonzogni