First result from the Jinping Underground Nuclear Astrophysics experiment JUNA: precise measurement of the 92 keV 25Mg(p, <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si59.svg"><mml:mrow><mml:mi>γ</mml:mi></mml:mrow></mml:math>)26Al resonance

Su, J.; Zhang, Hao; Li, Zhihong; Ventura, P.; Li, Yunju; Li, Ertao; Chen, Chen; Shen, Y. P.; Liu, Gang; Li, Xinyue; Zhang, Liyong; He, Jiajia; Sheng, Y. D.; Chen, Yinji; Wang, Luohuan; Zhang, Long; Cao, F. Q.; Nan, Wei; Nan, Weike; Li, Gexing; Song, N.; Cui, Baoqun; Chen, Lihua; Ma, Ruigang; Zhang, Zhicheng; Jiao, T. Y.; Gao, B. S.; Tang, Xiaodong; Wu, Qi; Li, Jiaqing; Sun, Limin; Wang, Shuo; Yan, Shengquan; Liao, J.; Wang, Youbao; Zeng, Sheng; Ding, Nan; Fan, Q. W.; Qi, Ningchun; Sun, Wenliang; Guo, Xuyuan; Zhang, Peng; Chen, Yunhua; Zhou, Yong; Zhou, Jifang; He, Jinrong; Shang, Changsong; Li, Mingchuan; Liu, Weiping

doi:10.1016/j.scib.2021.10.018

Cited by 23 publications

(22 citation statements)

References 33 publications

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“…Another milestone was the first direct observation of the 92 keV resonance in 25 Mg(p,γ) 26 Al on a solid target, with a reported resonance strength as low as ωγ = (2.9 ± 0.6) × 10 −10 eV [17]. The latter resonance has recently been studied at JUNA [18]. More recently at LUNA, the BGO detector in combination with neutron shielding was used for the first direct study of the tentative E c.m.…”

Section: Total Absorption Spectroscopy With a Bgo Detector At Lunamentioning

confidence: 99%

“…This allowed for very little passive material between the target and the detector, at the expense of increased time and effort needed to mount or exchange the target. The same target setup has been successfully used for the study of 23 Na(p,γ) 24 Mg [27], and 18 O(p,γ) 19 F [28].…”

Section: Target Chambers and Efficiencymentioning

confidence: 99%

“…res. = 65 keV resonance in the 17 O(p,γ) 18 F reaction [7]. An innovative application of the BGO detector to measure β + decays is reported in section 4.…”

Section: Introductionmentioning

confidence: 99%

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Advances in radiative capture studies at LUNA with a segmented BGO detector

Skowronski

Gesuè

Boeltzig

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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Studies of charged-particle reactions for low-energy nuclear astrophysics require high sensitivity, which can be achieved by means of detection setups with high efficiency and low backgrounds, to obtain precise measurements in the energy region of interest for stellar scenarios. High-efficiency total absorption spectroscopy is an established and powerful tool for studying radiative capture reactions, particularly if combined with the cosmic background reduction by several orders of magnitude obtained at the Laboratory for Underground Nuclear Astrophysics (LUNA). We present recent improvements in the detection setup with the Bismuth Germanium Oxide (BGO) detector at LUNA, aiming to reduce high-energy backgrounds and to increase the summing detection efficiency. The new design results in enhanced sensitivity of the BGO setup, as we demonstrate and discuss in the context of the first direct measurement of the 65 keV resonance (Ex = 5672 keV) of the 17O(p,gamma)18F reaction. Moreover, we show two applications of the BGO detector, which exploit its segmentation. In case of complex gamma-ray cascades, e.g. the de-excitation of Ex = 5672 keV in 18F, the BGO segmentation allows to identify and suppress the beam-induced background signals that mimic the sum peak of interest. We demonstrate another new application for such a detector in form of in-site activation measurements of a reaction with beta+ unstable product nuclei, e.g., the 14N(p,gamma)15O reaction.

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Section: Total Absorption Spectroscopy With a Bgo Detector At Lunamentioning

confidence: 99%

Section: Target Chambers and Efficiencymentioning

confidence: 99%

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Advances in radiative capture studies at LUNA with a segmented BGO detector

Skowronski

Gesuè

Boeltzig

et al. 2023

J. Phys. G: Nucl. Part. Phys.

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“…In addition, we were able to establish the most precise reaction rate for all temperatures owing to our indirect deduction of 58 keV, ground-based experimental results for 304 keV, our underground data for 92 keV (with a more precise ground-state feeding factor), and 189 keV resonances. We published the results, [6] also see Fig. 3.…”

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confidence: 91%

First Results from the Underground Nuclear Reaction Experiments in JUNA

Liu

2023

Chinese Phys. Lett.

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“…Durable implanted 19 F targets (31) were used in both 19 F(p, αγ) 16 O (32) and 19 F(p, γ) 20 Ne experiments. The γ rays were detected using a nearly 4π BGO detector array that was also employed in the preceding JUNA experiments (32,33). The typical γ-ray spectra are shown in Extended Data Fig.…”

mentioning

confidence: 99%

Measurement of $^{19}$F($p$,$γ$)$^{20}$Ne reaction suggests CNO break-out in first stars

Zhang,

He,

deBoer

et al. 2023

Preprint

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First result from the Jinping Underground Nuclear Astrophysics experiment JUNA: precise measurement of the 92 keV 25Mg(p, γ)26Al resonance

Cited by 23 publications

References 33 publications

Advances in radiative capture studies at LUNA with a segmented BGO detector

Advances in radiative capture studies at LUNA with a segmented BGO detector

First Results from the Underground Nuclear Reaction Experiments in JUNA

Measurement of $^{19}$F($p$,$γ$)$^{20}$Ne reaction suggests CNO break-out in first stars

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