A Limit of Neutrinoless Double Beta Decay of <SUP>48</SUP>Ca

YOU Ke; ZHU Yu-Can; LV Jun-Guang; SUN Han-Sheng; TIAN Wei-Hua; ZHAO Wen-Heng; ZHENG Zhi-Peng; YE Ming-Han; QING Cheng-Rui; HE Zuo-Xiu; CUI Feng-Zhu; YU Chang-Jiang

Chinese Physics C> 1991, Vol. 15> Issue(11) : 966-972

A Limit of Neutrinoless Double Beta Decay of ⁴⁸Ca

Institute of High Energy Physics,Academia Sinica,Beijing 1000392 China Center of advanced Science and Technology,World Laboratory,Beijing 1000803 Institute of Theoretical Physics,Academia Sinica,Beijing 1000804 Institute of optics and fine Mechanics,Academia Sinica,Changchun 130022

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Abstract：
A search for the neutrinoless double beta decay of ⁴⁸Ca is carried out in a coal mine which is located 512m underground near Beijing.Large scintillation crystals of natural CaF₂ were used as both the detector and the double beta decay source.Result obtained after a total of 7588.5 hours of data taking gives 1.1×10²² years (68%C.L.) as the lower limit of the half-life of the neutrinoless double beta decay of ⁶⁸Ca.

References

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J. D. Vergados, Phys. Report, 133(1986), 1.[2] Y. C. Zhu et al., lrfodcrn Phys. Lett., A1(1986), 231.[3] E. der Mateosian and M. Goldhaber, Phys. Rev., 146(1966), 810.[4] J.Menefee et al., IEEE Trans. NS-13(1966) 720.[5] W. H. Tian et al., Modcrn Phys. Lett., A4(1959), 213.[6] E. Fiorini, Proc. of International Symposium on Nuclear Beta Decay and Neutrino, Osaka, June (1986),11.[7] C. R. Ching, T. H. Ho and X. R. Wu, Phys, Rev.,. C40(1989), 304.[8] H. F. Wu et al., Phys. Lett., B162(1985), 227[9] R. K. Bardim, C.S.Wu et al., Nuclear, Phys., A158(1970), 337.

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YOU Ke, ZHU Yu-Can, LV Jun-Guang, SUN Han-Sheng, TIAN Wei-Hua, ZHAO Wen-Heng, ZHENG Zhi-Peng, YE Ming-Han, QING Cheng-Rui, HE Zuo-Xiu, CUI Feng-Zhu, YU Chang-Jiang and A Limit of Neutrinoless Double Beta Decay of ⁴⁸Ca[J]. Chinese Physics C, 1991, 15(11): 966-972.

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Received: 1900-01-01
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

A Limit of Neutrinoless Double Beta Decay of ⁴⁸Ca

Corresponding author: YOU Ke,

Institute of High Energy Physics,Academia Sinica,Beijing 1000392 China Center of advanced Science and Technology,World Laboratory,Beijing 1000803 Institute of Theoretical Physics,Academia Sinica,Beijing 1000804 Institute of optics and fine Mechanics,Academia Sinica,Changchun 130022

Received Date: 1900-01-01
Accepted Date: 1900-01-01
Available Online: 1991-11-05

Abstract: A search for the neutrinoless double beta decay of ⁴⁸Ca is carried out in a coal mine which is located 512m underground near Beijing.Large scintillation crystals of natural CaF₂ were used as both the detector and the double beta decay source.Result obtained after a total of 7588.5 hours of data taking gives 1.1×10²² years (68%C.L.) as the lower limit of the half-life of the neutrinoless double beta decay of ⁶⁸Ca.