Geoneutrino Spectrum and Luminosity

[ Other Geoneutrino Works / Sanshiro Home / RCNS ]

Spectrum

238U	Data File	EPS - PNG
232Th	Data File	EPS - PNG
235U	Data File	EPS - PNG
40K	Data File	EPS - PNG
87Rb	Data File	EPS - PNG
113Cd	Data File	EPS - PNG
115In	Data File	EPS - PNG
138La	Data File	EPS - PNG
176Lu	Data File	EPS - PNG
187Re	Data File	EPS - PNG

Download all spectrum: AntineutrinoSpectrum_all.tar.gz

Notes

Isotope data is taken from "R.B.Firestone et al., Table of Isotopes, Eighth Edition, Jhon Wiley & Sons, New York (1996)".
All decay branches whose branching ratios is greater than 0.01% are traced.
Data lines in "Spactrum Data" consist of neutrino energy E [keV] and neutrino intensity [1/keV], calculated at 1 keV energy step.
Spectra are normalized to one decay of the head element of each chain. Since the U238 chain contains 6 beta decays and the Th232 chain has 4 beta decays, the sums of the spectra are approximately 6 and 4, respectively. Differences from the number of decays (6 and 4) mainly come from omitted branchs and/or uncertainties of branching ratios.
Fermi Function F(Z, E) for nucleus electric field effect is included.
Corrections for forbidden transitions are *not* included, except for 40K and 210Bi.
For 40K, the 3rd unique forbidden transition formula is used.
For 210Bi, the spectrum tabulated in the following handbook is used; "V.G. Aleksankin et al., in: P.M. Rubzov (Ed.), Beta and Antineutrino Radiation of Radioactive Nuclei, Energoatomizdat, Moscow, 1989, pp719"
Current calculation does *not* include effect of finite size nuclei and orbit electron screeing.
Recoil of nuclei is *not* considered.

Luminosity

With total amounts of isotopes in the Earth (W.F.McDonough 1999), the total luminosity of geoneutrinos (i.e., the total number of geoneutrinos emitted from the whole Earth per unit time) is calculated.

Data File: geoneutirno-lumonosity.knt
Linear Scale Image: EPS - PNG
Log Scale Image: EPS - PNG

Updates

11 May 2006

Errors on luminosity calcuration are fixed.

19 January 2006

235U, 87Rb, 113Cd, 115In, 138La, 176Lu, and 187Re are included.
210Bi spectrum is changed: new spectrum is taken from V.G. Aleksankin et al. (1989)
40K spectrum is updated to include forbidden transition effects
README File

14 October 2003

A number of small branchs are included.
Calculation of Fermi Function for small energy electron (less than 51eV) is improved.
Spectrum normalization is improved.

Enomoto Sanshiro
(email contact: http://www.awa.tohoku.ac.jp/~sanshiro/kinoko-feedback/sendmail-e.html)