Measurement of radiative decay width of the Hoyle state of 12C via 12C(p, p′)12C reaction

IF 1.7 4区物理与天体物理 Q2 PHYSICS, NUCLEAR

Nuclear Physics A Pub Date : 2025-04-30 DOI:10.1016/j.nuclphysa.2025.123133

T.K. Rana , Deepak Pandit , S. Manna , Samir Kundu , K. Banerjee , A. Sen , R. Pandey , G. Mukherjee , T.K. Ghosh , S.S. Nayak , R. Shil , P. Karmakar , K. Atreya , K. Rani , D. Paul , R. Santra , A. Sultana , S. Basu , S. Pal , S. Sadhukhan , C. Bhattacharya

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Abstract

The Hoyle state, the second excited state of ¹²C at an excitation energy of 7.65 MeV, plays a vital role in nucleosynthesis. Its radiative decay width serves as a crucial channel for the formation of ¹²C and all heavier elements in the Universe. To investigate this, exclusive experiments were conducted to measure the radiative decay width of the Hoyle state via the ¹²C(p, p′)¹²C reaction. The radiative decay branching ratio

Γ_{r a d}

/Γ was determined to be 4.03(21) × 10⁻⁴. Based on the currently accepted values of

Γ_{π} (E 0) / Γ

and

Γ_{π} (E 0)

, the radiative width of the Hoyle state was calculated as 3.75(40) × 10⁻³ eV.

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12C（p, p′）12C反应测量12C霍伊尔态辐射衰减宽度

Hoyle态是12C的第二激发态，激发能为7.65 MeV，在核合成中起着至关重要的作用。它的辐射衰减宽度是12C和宇宙中所有重元素形成的关键通道。为了研究这一点，我们进行了专门的实验，通过12C(p, p ')12C反应来测量霍伊尔态的辐射衰减宽度。辐射衰变分支比Γrad/Γ为4.03（21）× 10−4。根据目前公认的Γπ(E0)/Γ和Γπ(E0)，计算出霍伊尔态的辐射宽度为3.75（40）× 10−3 eV。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nuclear Physics A 物理-物理：核物理

CiteScore

3.60

自引率

7.10%

发文量

113

审稿时长

61 days

期刊介绍： Nuclear Physics A focuses on the domain of nuclear and hadronic physics and includes the following subsections: Nuclear Structure and Dynamics; Intermediate and High Energy Heavy Ion Physics; Hadronic Physics; Electromagnetic and Weak Interactions; Nuclear Astrophysics. The emphasis is on original research papers. A number of carefully selected and reviewed conference proceedings are published as an integral part of the journal.