Abstract
Primary goal of the WITCH experiment is to test the Standard Model for a possible admixture of a scalar or tensor type interaction in β-decay. This information will be inferred from the shape of the recoil energy spectrum. The experimental set-up was completed and is under intensive commissioning at ISOLDE (CERN). It combines a Penning trap to store the ions and a retardation spectrometer to probe the recoil ion energy. A brief overview of the WITCH set-up and the results of commissioning tests performed until now are presented. Finally, perspectives of the physics program are reviewed.
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Lee, T.D., Yang, C.N.: Question of parity conservation in weak interactions. Phys. Rev. 104, 254 (1956)
Jackson, J.D., Treiman, S.B., Wyld, H.W.: Possible tests of time reversal invariance in beta decay. Phys. Rev. 106, 517 (1957)
Severijns, N., Beck, M., Naviliat-Cuncic, O.: Tests of the standard electroweak model in nuclear beta decay. Rev. Mod. Phys. 78, 991 (2006), nucl-ex/0605029
Jackson, J.D., Treiman, S.B., Wyld, H.W.: Coulomb corrections in allowed beta transitions. Nucl. Phys. 4, 206 (1957)
Gorelov, A., et al.: Scalar interaction limits from the β-ν (beta-neutrino) correlation of trapped radioactive atoms. Phys. Rev. Lett. 94, 142501 (2005)
Scielzo, N., et al.: Measurement of the β-ν (beta-neutrino) correlation using magneto-optically trapped 21Na. Phys. Rev. Lett. 93, 102501 (2004)
Rodriguez, D., et al.: The LPCTrap for the measurement of the β-ν correlation in 6He. Eur. Phys. J. A, 25(Suppl. 1), 705 (2005)
Adelberger, E.G., et al.: Positron-neutrino correlation in the 0+→0+ decay of 32Ar. Phys. Rev. Lett., 83, 1299 (1999)
Kugler, E.: The ISOLDE facility. Hyp. Int. 129, 23 (2000)
Ames, F., et al.: Cooling of radioactive ions with the Penning trap REXTRAP. Nucl. Instrum. Methods, A 538, 17 (2005)
Coeck, S., et al.: A pulsed drift cavity to capture 30 keV ion bunches at ground potential. Nucl. Instrum. Methods, A 572, 585 (2007)
Beck, M., et al.: WITCH: a recoil spectrometer for weak interaction and nuclear physics studies. Nucl. Instrum. Methods, A 503, 567 (2003)
Kozlov, V., et al.: The WITCH experiment: completion of a set-up to investigate the structure of weak interactions with a Penning trap. Int. J. Mass Spec. 251, 159 (2006)
König, M., et al.: Quadrupole excitation of stored ion motion at the true cyclotron frequency. Int. J. Mass Spec. 142, 95 (1995)
Liénard, E., et al.: Performance of a micro-channel plates position sensitive detector. Nucl. Instrum. Methods, A 551, 375 (2005)
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Kozlov, V.Y., Beck, M., Coeck, S. et al. The WITCH experiment: towards weak interactions studies. Status and prospects. Hyperfine Interact 172, 15–22 (2006). https://doi.org/10.1007/s10751-007-9519-2
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DOI: https://doi.org/10.1007/s10751-007-9519-2