测量137 xe的β-纪念日的光谱形状与exo-200中的137C的基态，并与理论进行比较

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测量137 xe的β-纪念日的光谱形状与exo-200中的137C的基态，并与理论进行比较

Measurement of the Spectral Shape of the beta-decay of 137Xe to the Ground State of 137Cs in EXO-200 and Comparison with Theory

论文作者

Kharusi, S. Al, Anton, G., Badhrees, I., Barbeau, P. S., Beck, D., Belov, V., Bhatta, T., Breidenbach, M., Brunner, T., Cao, G. F., Cen, W. R., Chambers, C., Cleveland, B., Coon, M., Craycraft, A., Daniels, T., Darroch, L., Daugherty, S. J., Davis, J., Delaquis, S., Der Mesrobian-Kabakian, A., DeVoe, R., Dilling, J., Dolgolenko, A., Dolinski, M. J., Echevers, J., Fairbank Jr., W., Fairbank, D., Farine, J., Feyzbakhsh, S., Fierlinger, P., Fudenberg, D., Gautam, P., Gornea, R., Gratta, G., Hall, C., Hansen, E. V., Hoessl, J., Hufschmidt, P., Hughes, M., Iverson, A., Jamil, A., Jessiman, C., Jewell, M. J., Johnson, A., Karelin, A., Kaufman, L. J., Koffas, T., Kostensalo, J., Krücken, R., Kuchenkov, A., Kumar, K. S., Lan, Y., Larson, A., Lenardo, B. G., Leonard, D. S., Li, G. S., Li, S., Li, Z., Licciardi, C., Lin, Y. H., MacLellan, R., McElroy, T., Michel, T., Mong, B., Moore, D. C., Murray, K., Nakarmi, P., Njoya, O., Nusair, O., Odian, A., Ostrovskiy, I., Piepke, A., Pocar, A., Retière, F., Robinson, A. L., Rowson, P. C., Ruddell, D., Runge, J., Schmidt, S., Sinclair, D., Skarpaas, K., Soma, A. K., Stekhanov, V., Suhonen, J., Tarka, M., Thibado, S., Todd, J., Tolba, T., Totev, T. I., Tsang, R., Veenstra, B., Veeraraghavan, V., Vogel, P., Vuilleumier, J. -L., Wagenpfeil, M., Watkins, J., Weber, M., Wen, L. J., Wichoski, U., Wrede, G., Wu, S. X., Xia, Q., Yahne, D. R., Yang, L., Yen, Y. -R., Zeldovich, O. Ya., Ziegler, T.

论文摘要

我们报告了理论上预测的和实验测量的第一个非唯一$β$ -decay trantition $^{137} \ textrm {xe}（7/2^ - ）\ to \ to \，^137} {137} \ textrm {cs}（cs cs}（7/7/2^+）。实验数据是通过AMBE中子源部署期间的Exo-200实验获得的。 exo-200的超低背景环境以及专用的源部署和分析程序允许收集纯粹的衰减样本，估计的信号背景比在1075至4175 keV的能量范围内的信噪比超过99到1。除了提供对第一个非唯一的$β$ - 特定形状的罕见，准确的测量外，这项工作还构成了反应堆抗神经抗体异常和光谱bump的背景下计算出的电子光谱形状的新测试。

We report on a comparison between the theoretically predicted and experimentally measured spectra of the first-forbidden non-unique $β$-decay transition $^{137}\textrm{Xe}(7/2^-)\to\,^{137}\textrm{Cs}(7/2^+)$. The experimental data were acquired by the EXO-200 experiment during a deployment of an AmBe neutron source. The ultra-low background environment of EXO-200, together with dedicated source deployment and analysis procedures, allowed for collection of a pure sample of the decays, with an estimated signal-to-background ratio of more than 99-to-1 in the energy range from 1075 to 4175 keV. In addition to providing a rare and accurate measurement of the first-forbidden non-unique $β$-decay shape, this work constitutes a novel test of the calculated electron spectral shapes in the context of the reactor antineutrino anomaly and spectral bump.

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