/ Theory-Nucl arXiv:1212.1332


Lifetime measurements of 214Po and 212Po with the CTF liquid scintillator detector at LNGS


Bellini, G. (INFN, Milan) ; Benziger, J. (Princeton U., Chem. Eng. Dept.) ; Bick, D. (Hamburg U., Inst. Exp. Phys. II) ; Bonfini, G. (Gran Sasso) ; Bravo, D. (Virginia Tech.) ; Avanzini, M.Buizza (INFN, Milan) ; Caccianiga, B. (INFN, Milan) ; Cadonati, L. (Massachusetts U., Amherst) ; Calaprice, F. (Princeton U.) ; Carraro, C. (INFN, Genoa) ; Cavalcante, P. (Gran Sasso) ; Chavarria, A. (Princeton U.) ; Chepurnov, A. (Moscow State U.) ; Chubakov, V. (INFN, Ferrara) ; \textquoteright, D.D. (INFN, Milan) ; Davini, S. (INFN, Genoa) ; Derbin, A. (St. Petersburg, INP) ; Etenko, A. (Kurchatov Inst., Moscow) ; Fomenko, K. (Dubna, JINR) ; Franco, D. (DAPNIA, Saclay) ; Galbiati, C. (Princeton U.) ; Gazzana, S. (Gran Sasso) ; Ghiano, C. (Gran Sasso) ; Giammarchi, M. (INFN, Milan) ; Goger-Neff, M. (Munich, Tech. U.) ; Goretti, A. (Princeton U.) ; Grandi, L. (Princeton U.) ; Guardincerri, E. (INFN, Genoa) ; Hardy, S. (Virginia Tech.) ; Ianni, Aldo (Gran Sasso) ; Ianni, Andrea (Princeton U.) ; Kobychev, V. (Kiev, INR) ; Korablev, D. (Dubna, JINR) ; Korga, G. (Gran Sasso) ; Koshio, Y. (Gran Sasso) ; Kryn, D. (DAPNIA, Saclay) ; Laubenstein, M. (Gran Sasso) ; Lewke, T. (Munich, Tech. U.) ; Lissia, Marcello (INFN, Cagliari) ; Litvinovich, E. (Kurchatov Inst., Moscow) ; Loer, B. (Princeton U.) ; Lombardi, F. (Gran Sasso) ; Lombardi, P. (INFN, Milan) ; Ludhova, L. (INFN, Milan) ; Machulin, I. (Kurchatov Inst., Moscow) ; Manecki, S. (Virginia Tech.) ; Maneschg, W. (Heidelberg, Max Planck Inst.) ; Manuzio, G. (INFN, Genoa) ; Meindl, Q. (Munich, Tech. U.) ; Meroni, E. (INFN, Milan) ; Miramonti, L. (INFN, Milan) ; Misiaszek, M. (Jagiellonian U.) ; Montanari, D. (Fermilab) ; Mosteiro, P. (Princeton U.) ; Mantovani, F. (INFN, Ferrara) ; Muratova, V. (St. Petersburg, INP) ; Nisi, S. (Gran Sasso) ; Oberauer, L. (Munich, Tech. U.) ; Obolensky, M. (DAPNIA, Saclay) ; Ortica, F. (INFN, Perugia) ; Otis, K. (Massachusetts U., Amherst) ; Pallavicini, M. (INFN, Genoa) ; Papp, L. (Virginia Tech.) ; Perasso, L. (INFN, Milan) ; Perasso, S. (INFN, Genoa) ; Pocar, A. (Massachusetts U., Amherst) ; Ranucci, G. (INFN, Milan) ; Razeto, A. (Gran Sasso) ; Re, A. (INFN, Milan) ; Romani, A. (INFN, Perugia) ; Rossi, N. (Gran Sasso) ; Sabelnikov, A. (Kurchatov Inst., Moscow) ; Saldanha, R. (Princeton U.) ; Salvo, C. (INFN, Genoa) ; Schonert, S. (Heidelberg, Max Planck Inst.) ; Simgen, H. (Heidelberg, Max Planck Inst.) ; Skorokhvatov, M. (Kurchatov Inst., Moscow) ; Smirnov, O. (Dubna, JINR) ; Sotnikov, A. (Dubna, JINR) ; Sukhotin, S. (Kurchatov Inst., Moscow) ; Suvorov, Y. (Kurchatov Inst., Moscow) ; Tartaglia, R. (Gran Sasso) ; Testera, G. (INFN, Genoa) ; Vogelaar, R.B. (Virginia Tech.) ; Von Feilitzsch, F. (Munich, Tech. U.) ; Winter, J. (Munich, Tech. U.) ; Wojcik, M. (Jagiellonian U.) ; Wright, A. (Princeton U.) ; Wurm, M. (Munich, Tech. U.) ; Xhixha, G. (INFN, Ferrara) ; Xu, J. (Princeton U.) ; Zaimidoroga, O. (Dubna, JINR) ; Zavatarelli, S. (INFN, Genoa) ; Zuzel, G. (Jagiellonian U.)

Pages: 11

Abstract: We have studied the alpha decays of 214Po into 210Pb and of 212Po into 208Pb tagged by the coincidence with the preceding beta decays from 214Bi and 212Bi, respectively. The employed 222Rn, 232Th, and 220Rn sources were sealed inside quartz vials and inserted in the Counting Test Facility at the underground Gran Sasso National Laboratory in Italy. We find that the mean lifetime of 214Po is (236.00 +- 0.42(stat) +- 0.15(syst)) \mu s and that of 212Po is (425.1 +- 0.9(stat) +- 1.2(syst)) ns. Our results, obtained from data with signal-to-background ratio larger than 1000, reduce the overall uncertainties and are compatible with previous measurements.

Keyword(s): Po-214 ; Po-212 ; alpha-decay lifetime ; natural radioactivity

Web-Page: http://inspirehep.net/record/1205901/files/arXiv:1212.1332.pdf; http://inspirehep.net/record/1205901/files/Bi212a.png; http://inspirehep.net/record/1205901/files/Bi212b.png; http://inspirehep.net/record/1205901/files/Bi214.png; http://inspirehep.net/record/1205901/files/Po212.png; http://inspirehep.net/record/1205901/files/Po214.png


Note: RevTex, 11 pages, 5 figures, 3 tables

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