论文标题
搜索Muon催化$ D^3He $ Fusion
Search for muon catalyzed $d^3He$ fusion
论文作者
论文摘要
该报告介绍了旨在观察Muon催化$^3 \！He \; D $融合反应$^3 \！He+μ\; d \ to^3 \ to^3 \！He \;μ\; d \; d \; d \; $ d_2+^3 \！he $煤气混合物。实验设置的基本元素是时间投影室（TPC），它可以检测到传入的muons和融合反应的产物。 TPC以$ d_2 + ^3He（5％）$ GAS混合物的$ 31K $温度运行。大约$ 10^8 $ $^3 \！he \;μ\; d $分子仅生产了2个注册的候选者，用于催化$^3 \！he \; d $ fusion，其预期背景$ n_ {bg} = 2.2 \ 2.2 \ pm 0.3 $ 0.3 $ 0.3 $ events。这给出了$^3 \！he \;μ\; d $分子$ p_ {f}（^3 \！he \;μ\;μ\; d）\ leq 1.1 \ cdot 10^{ - 7} $在90％c.l. c.l.的概率上限。还提出的是$^3 \！He \;μ\; d $分子$λ_{d3he} = 192（3）\ cdot 10^6 s^{ - 1} $的概率以及从激动的$μ\; d $ q $ q_ $ q ot $ q ot $ q ot的概率的可能性。
This report presents the results of an experiment aimed at observation of the muon catalyzed $^3\!He\;d$ fusion reaction $^3\!He + μ\;d\to^3\!He\;μ\;d\to^4\!He(3.66MeV)+p(14.64MeV)+μ$ which might occur after a negative muon stop in the $D_2+^3\!He$ gas mixture. The basic element of the experimental setup is a Time Projection Chamber (TPC) which can detect the incoming muons and the products of the fusion reaction. The TPC operated with the $D_2 + ^3He (5%)$ gas mixture at $31K$ temperature. About $10^8$ $^3\!He\;μ\;d$ molecules were produced with only 2 registered candidates for the muon catalyzed $^3\!He\;d$ fusion with the expected background $N_{bg}=2.2\pm 0.3$ events. This gives an upper limit for the probability of the fusion decay of the $^3\!He\;μ\;d$ molecule $P_{F}(^3\!He\;μ\;d)\leq 1.1\cdot 10^{-7}$ at 90% C.L. Also presented are the measured formation rate of the $^3\!He\;μ\;d$ molecule $λ_{d3He}=192(3)\cdot 10^6 s^{-1}$ and the probability of the fast muon transfer from the excited to the ground state of the $μ\;d$ atom $q_{1S}=0.80(3)$.
