Precision measurement of the Bi-210 beta spectrum

Alekseev I. E.; Bakhlanov S. V; Derbin A. V; Drachnev I. S.; Kotina I. M.; Lomskaya I. S.; Muratova V. N.; Niyazova N. V; Semenov D. A.; Trushin M. V; Unzhakov E. V

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Precision measurement of the Bi-210 beta spectrum

机译：Bi-210β光谱的精确测量

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The precision measurement of beta-spectrum shape for Bi-210 (historically RaE) has been performed with a spectrometer based on semiconductor Si(Li) detector. This first forbidden nonunique transition has the transition form factor strongly deviated from unity, and knowledge of its spectrum would play an important role in low-background physics in the presence of Pb-210 background. The measured transition formfactor could be approximated as C(W ) = 1 + (-0.4470 +/- 0.0013)W + (0.0552 +/- 0.0004)W-2, that is in good agreement with previous studies and has significantly increased parameter precision.

机译：利用基于半导体Si（Li）探测器的光谱仪对Bi-210（RaE）的β谱形状进行了精确测量。第一个被禁止的非均匀跃迁的跃迁形状因子严重偏离了统一性，在Pb-210背景存在的情况下，对其光谱的了解将在低背景物理中发挥重要作用。测得的过渡系数可近似为C（W）=1+（-0.4470+/-0.0013）W+（0.0552+/-0.0004）W-2，这与之前的研究非常一致，并显著提高了参数精度。

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《Physical review, C》 |2020年第6期|共8页
作者
Alekseev I. E.; Bakhlanov S. V; Derbin A. V; Drachnev I. S.; Kotina I. M.; Lomskaya I. S.; Muratova V. N.; Niyazova N. V; Semenov D. A.; Trushin M. V; Unzhakov E. V;
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VG Khlopin Radium Inst St Petersburg 194021 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

Natl Res Ctr Petersburg Nucl Phys Inst Kurchatov Inst Gatchina 188350 Russia;

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正文语种 eng
中图分类原子核物理学、高能物理学;
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Precision measurement of the Bi-210 beta spectrum

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