TeO_2测辐射热计对α粒子的响应
Response of a TeO_2 bolometer to alpha particles
摘要：
$TeO_2$晶体在寻找没有中微子发射的双β衰变的实验中被用作测辐射热计。在这种极其微妙的实验中，最重要的问题之一是背景的表征。因此，必须了解在预期信号的能量范围内对$α$粒子的响应。本文报道了$TeO_2$测辐射热计对生长阶段溶解在晶体中的$^{147}$ Sm发射的$α$的响应函数的结果。发现猝灭因子（$1.0076\pm 0.0005$）与研究范围内的温度无关。$α$峰的能量分辨率显示出标准量热计能量依赖性：$σ\; [\rm{keV}] = (0.56 \pm 0.02) \oplus (0.010 \pm 0.002)\sqrt{E[\rm{keV}]} $。信号脉冲显示$α$和$βγ$颗粒之间无差异
英文摘要：
$TeO_2$ crystals are used as bolometers in experiments searching for Double Beta Decay without emission of neutrinos. One of the most important issues in this extremely delicate kind of experiments is the characterization of the background. The knowledge of the response to $α$ particles in the energy range where the signal is expected is therefore a must. In this paper we report the results on the response function of a $TeO_2$ bolometer to $α$'s emitted by $^{147}$Sm dissolved in the crystal at the growth phase. A Quenching Factor of ($1.0076\pm 0.0005$) is found, independent of the temperature in the investigated range. The energy resolution on $α$ peaks shows a standard calorimeter energy dependence: $σ\; [\rm{keV}] = (0.56 \pm 0.02) \oplus (0.010 \pm 0.002)\sqrt{E[\rm{keV}]} $. Signal pulses show no difference between $α$ and $βγ$ particles
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