Directed Neutrino Beam with Electron Capture Beta Decay

Details Directed Neutrino Beam with Electron Capture Beta Decay Directed Neutrino Beam with Electron Capture Beta Decay

Mar 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aps..aprb10007t&link_type=abstract

American Physical Society, APS April Meeting 2012, March 31-Apr 3, 2012, abstract #B10.007

Physics

Scientific paper

We suggest generation of directed neutrino beams using electron capture beta decay sources. The basic idea is the following. Consider a Gamov-Teller transition with a decrease of nuclear spin I of one unit: I->I-1. Assume that the nuclear spins are highly polarized by a magnetic field at low temperature. In this case the z-component of the total angular momentum before decay is Fz=I. The electron capture beta decay produces an unpaired electron with spin S=12 and a neutrino with spin V=12. From conservation of the z-component of the angular momentum we obtain after the decay Iz=I-1, Sz=12, Vz=11. From the helicity requirement, the emitted neutrino momentum is opposite to the direction of its spin. Thus, the considered source generates a directed neutrino beam propagating in the negative z-direction. We show an opportunity for experimental detection of the average recoil force produced by the neutrino emission with a conventional technique of atomic force microscopy.

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