First 0 nu half-life limit from the Gotthard xenon time projection chamber
H T Wong; F Boehm; P Fisher; K Gabathuler; H E Henrikson; D A Imel; M Z Iqbal; V Jorgens; L W Mitchell; B M O'Callaghan-Hay; J Thomas; M Treichel; J -C Vuilleumier; J -L Vuilleumier; H T Wong; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; F Boehm; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; P Fisher; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; K Gabathuler; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; H E Henrikson; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; D A Imel; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; M Z Iqbal; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; V Jorgens; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; L W Mitchell; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; B M O'Callaghan-Hay; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; J Thomas; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; M Treichel; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; J -C Vuilleumier; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA; J -L Vuilleumier; Norman Bridge Lab. of Phys., California Inst. of Technol., Pasadena, CA, USA
Журнал:
Journal of Physics G: Nuclear and Particle Physics
Дата:
1991-12-01
Аннотация:
A xenon time-projection-chamber (TPC) with an active volume of 207 liters has been built to study 0 nu and 2 nu double beta decay in <sup>136</sup>Xe. The TPC has been installed in the Gotthard Tunnel Underground Laboratory, and is currently taking data with 5 atm of xenon enriched in 62.5% <sup>136</sup>Xe. The first 166 hours of data are presented. Based on this data set, the authors deduce a half-life limit of T<sub>1</sub>2/<sup>0 nu </sup>(0<sup>+</sup> to 0<sup>+</sup>)>6.2*10<sup>21</sup> years for the 0 nu mode, at a 90% CL.
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