Recycling NuDat Programs A.A. Sonzogni, T.D. Johnson, E.A. McCutchan, National Nuclear Data Center Brookhaven National Laboratory Building 817 Upton, NY.

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

NSDD 2015 #2 - Alejandro Sonzogni

Using NuDat classes to plot beta-minus T1/2

Kratz-Hermann systematics

NSDD 2015 #3 - Alejandro Sonzogni

Using NuDat classes to plot EC T1/2

0+ to 0+ OO decays, ex. 34Cl 34S

Problem in ENSDF?

Same Jp decays, ex. 25Al 25Mg

NSDD 2015 #4 - Alejandro Sonzogni

We will query ENSDF to obtain reliable ECp values to plot Pp/T1/2

Z=47

Z=14, 20

63 cases, with Z=14-80Scatter on the plot is mainly due to Z, which the proton is sensitive to

NSDD 2015 #5 - Alejandro Sonzogni

A better assumption would be to assume that Pp = ∫ T(Ep) dEp, where T(Ep)=(1+exp( a(Vb-Ep) )-1, and Vb=1.44 Z/Ro A1/3

NSDD 2015 #6 - Alejandro Sonzogni

No adjustable parametersPhys. Rev. C 91, 011301(R) (2015)

For energies > 5 MeV, the electron and antineutrino spectra are mainly

due to about 20 nuclidesThe decay of these nuclides is of

great interest

Recent Antineutrino Spectra Calculations

NSDD 2015 #7 - Alejandro Sonzogni

The integral of antineutrino multiplicity has a similar behavior as the delayed neutron multiplicity.

Target Delayed neutronmultiplicity/fission

238U 4.4E-2

235U 1.59E-2

241Pu 1.62E-2

239Pu 6.45E-3

n + p n + e+ cross section integrated spectra

NSDD 2015 #8 - Alejandro Sonzogni

235U thermal fission yields

235U thermal Yi/<sI>

Yi=CFYi∫s(e)Ini(e)

<sI>=SYi

NSDD 2015 #9 - Alejandro Sonzogni

238U fast Yi/<sI>

239Pu thermal Yi/<sI>

NSDD 2015 #10 - Alejandro Sonzogni

Systematics of <sI> with (3Z-A)

LFF: Light fission fragments ( Z<47)

HFF: Heavy Fission Fragments (Z >= 47)

EE: Even-Z, Even-NEO: Even-Z, Odd-NOE: Odd-Z, Even-NOO: Odd-Z, Odd-N

NSDD 2015 #11 - Alejandro Sonzogni

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, 11/20132nd workshop SUBATECH, Nantes, 01/2015

NSDD 2015 #12 - Alejandro Sonzogni

235U Thermal

Relation to decay heat

NSDD 2015 #13 - Alejandro Sonzogni

235U Thermal 92Rb, 100Nb, 96Y, 101Nb,102Nb

NSDD 2015 #14 - Alejandro Sonzogni

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.

Conclusions