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arXiv 1408.4985physics.ins-detnucl-ex
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$\rm^{124}Sn$中中子感生本底及其对0-$νββ$衰变搜索影响的研究

Study of neutron-induced background and its effect on the search of 0$νββ$ decay in $\rm^{124}Sn$

N. Dokania, V. Singh, S. Mathimalar, C. Ghosh, V. Nanal, R. G. Pillay, S. Pal, K. G. Bhushan, A. Shrivastava

摘要:

研究了TIN探测器各部件中的中子诱导本底,该探测器正在研制中,用于在$\rm^{124}Sn$中搜索无中子双β衰变。利用$^{9}Be(p,n)^{9}B$反应产生了覆盖宽能量范围($ \sim0.1$ ~ $ \sim18$ ~MeV)的快中子通量$\sim10^{6}~n~cm^{-2}s^{-1}$。此外,还利用$^{7}Li(p,n)^{7}Be$反应研究了准单能中子反应。在研究的不同低温支撑结构中,发现与Torlon相比,Teflon是优选的,因为没有高能伽马背景($E_γ>$ 1 MeV)。在$\rm ^{nat, 124} $ Sn中的中子诱导反应的贡献,从其他Sn同位素(A = 112 - 122)在感兴趣的能量区域,即周围的$Q_{ββ}$的$\rm^{124}Sn$($E \sim$ 2.293 MeV),也进行了研究。

英文摘要:

Neutron-induced background has been studied in various components of the TIN.TIN detector, which is under development for the search of Neutrinoless Double Beta Decay in $\rm^{124}Sn$. Fast neutron flux $\sim10^{6}~n~cm^{-2}s^{-1}$ covering a broad energy range ($ \sim0.1$ to $ \sim18$~MeV) was generated using $^{9}Be(p,n)^{9}B$ reaction. In addition, reactions with quasi-monoenergetic neutrons were also studied using $^{7}Li(p,n)^{7}Be$ reaction. Among the different cryogenic support structures studied, Teflon is found to be preferable compared to Torlon as there is no high energy gamma background ($E_γ>$ 1 MeV). Contribution of neutron-induced reactions in $\rm ^{nat, 124} $Sn from other Sn isotopes (A = 112 -- 122) in the energy region of interest, namely, around the $Q_{ββ}$ of $\rm^{124}Sn$ ($E \sim$ 2.293 MeV), is also investigated.

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