Neutrino capture cross-sections for Ar-40 and Beta decay of Ti-40 - INSPIRE

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Neutrino capture cross-sections for Ar-40 and Beta decay of Ti-40

W.E. Ormand
(
- Caltech, Kellogg Lab
)
,
P.M. Pizzochero
(
- Milan U. and
- INFN, Milan
)
,
P.F. Bortignon
(
- Milan U. and
- INFN, Milan
)
,
R.A. Broglia
(
- Milan U. and
- INFN, Milan and
- Bohr Inst.
)

May 10, 1994

13 pages

Published in:

Phys.Lett.B 345 (1995) 343-350

e-Print:

nucl-th/9405007 [nucl-th]

DOI:

10.1016/0370-2693(94)01605-C

Report number:

NTGMI-94-4

View in:

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Abstract:

Shell-model calculations of solar neutrino absorption cross sections for

~{40}

Ar, the proposed component of the ICARUS detector, are presented. It is found that low-lying Gamow-Teller transitions lead to a significant enhancement of the absorption rate over that expected from the Fermi transition between the isobaric analog states, leading to an overall absorption rate of 6.7 SNU. We also note that the pertinent Gamow-Teller transitions in ~{\sss 40}Ar are experimentally accessible from the

\beta

-decay of the mirror nucleus ~{\sss 40}Ti. Predictions for the branching ratios to states in ~{\sss 40}Sc are presented, and the theoretical halflife of 53ms is found to be in good agreement with the experimental value of

56~{+18}_{-12}

ms.

Nuclear structure
Solar neutrino spectroscopy
neutrino: solar
neutrino: absorption
absorption: neutrino
neutrino nucleus: nuclear reaction
argon
cross section: capture
capture: cross section
shell model

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