PARIS - Proton cApture Reactions in type Ia Supernovae

巴黎 - Ia 型超新星中的质子捕获反应

• 批准号: 225863585
• 负责人: Dr. Kerstin Sonnabend
• 金额: --
• 依托单位: Institut für Angewandte Physik
• 依托单位国家: 德国
• 项目类别: Independent Junior Research Groups
• 财政年份: 2012
• 资助国家: 德国
• 起止时间: 2011-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/225863585?language=en
• 关键词: PARIS; Proton; cApture; Reactions; type

The question about the origin of the heavy elements is one of the major unsolved problems concerning the physics of the Universe. While the overall picture seems clear, a closer inspection of this complex topic has opened up many challenging questions. An especially puzzling case is the production of about 35 proton-rich, low-abundant isotopes, which cannot be produced in neutron capture reactions, the so-called p nuclei. The lightest ones might be produced by a series of proton capture reactions occurring in type Ia supernovae. A precise experimentally based knowledge of the relevant reaction cross sections is the key to investigate whether this is a realistic picture. If so, the nucleosynthesis of the p nuclei can be used to observe the interior of type Ia supernovae as it constrains their astrophysical parameters and, therefore, to serve as a tool to better understand the physics of these cosmological standard candles. This Emmy Noether proposal aims at establishing the experimental techniques to investigate these proton capture reactions with high intensity proton beams. The production of the most abundant p nucleus 92Mo in type Ia supernovae will be studied by measuring the reactions 90Zr(p,γ) and 91Nb(p,γ) with a high efficient 4π BaF2 calorimeter at the FRANZ facility at Goethe University Frankfurt. The needed extensions of FRANZ and the development of high-power, in case of 91Nb unstable, samples will be performed. Afterwards, FRANZ will be a worldwide unique facility to measure proton-induced reactions with highest proton intensities.

关于重元素起源的问题是宇宙物理学中尚未解决的主要问题之一。虽然总体情况似乎很清楚，但对这一复杂主题的更仔细检查已经提出了许多具有挑战性的问题。一个特别令人困惑的例子是产生了大约35种富含质子、丰度低的同位素，这些同位素不能在中子俘获反应中产生，即所谓的p核。最轻的可能是由Ia型超新星中发生的一系列质子捕获反应产生的。一个精确的实验为基础的相关反应截面的知识是关键，以调查这是否是一个现实的画面。如果是这样的话，p核的核合成可以用来观察Ia型超新星的内部，因为它限制了它们的天体物理参数，因此，可以作为一种工具来更好地理解这些宇宙学标准烛光的物理学。这个Emmy Noether的建议旨在建立实验技术来研究这些质子捕获反应与高强度质子束。在法兰克福歌德大学的FRANZ装置上，将用高效的4π BaF 2量热计测量90 Zr（p，γ）和91 Nb（p，γ）反应，研究Ia型超新星中最丰富的p核92 Mo的产生。在91Nb不稳定的情况下，将进行所需的FRANZ扩展和高功率样品的开发。之后，FRANZ将成为全球独一无二的测量质子强度最高的质子诱导反应的设施。

项目成果

Determination of the Ce142 (γ,n) cross section using quasi-monoenergetic Compton backscattered γ rays

使用准单能康普顿背散射 γ 射线测定 Ce142 (γ,n) 截面

• DOI: 10.1103/physrevc.89.035803
• 发表时间: 2014
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: A. Sauerwein;K. Sonnabend;M. Fritzsche;J. Glorius;E. Kwan;N. Pietralla;C. Romig;G. Rusev;D. Savran;L. Schnorrenberger;A. P. Tonchev;W. Tornow;H. R. Weller
• 通讯作者: H. R. Weller

Low-lying dipole strength of the open-shell nucleus 94 Mo

开壳核 94 Mo 的低位偶极子强度

• DOI: 10.1103/physrevc.88.044331
• 发表时间: 2013
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: C. Romig;J. Beller;J. Glorius;J. Isaak;J. H. Kelley;E. Kwan;N. Pietralla;V. Y. Ponomarev;A. Sauerwein;D. Savran;M. Scheck;L. Schnorrenberger;K. Sonnabend;A. P. Tonchev;W. Tornow;H. R. Weller;A. Zilges;M. Zweidinger
• 通讯作者: M. Zweidinger

The 106Cd(α, α)106Cd elastic scattering in a wide energy range for γ process studies

用于 γ 过程研究的宽能量范围内的 106Cd(α, α)106Cd 弹性散射

• DOI: 10.1016/j.nuclphysa.2015.04.008
• 发表时间: 2015
• 期刊: Nuclear Physics
• 作者: A. Ornelas;G. G. Kiss;P. Mohr;D. Galaviz;Z. Fülöp;G. Gyürky;Z. Máté;T. Rauscher;E. Somorjai;K. Sonnabend;A. Zilges
• 通讯作者: A. Zilges

Experimental cross sections of Ho 165 ( α , n ) Tm 168 and Er 166 ( α , n ) Yb 169 for optical potential studies relevant for the astrophysical γ process

Ho 165 ( α , n ) Tm 168 和 Er 166 ( α , n ) Yb 169 的实验横截面，用于与天体物理 γ 过程相关的光学势研究

• DOI: 10.1103/physrevc.89.065808
• 发表时间: 2014
• 期刊: Physical Review C
• 影响因子: 3.1
• 作者: J. Glorius;K. Sonnabend;J. Görres;D. Robertson;M. Knörzer;A. Kontos;T. Rauscher;R. Reifarth;A. Sauerwein;E. Stech;W. Tan;T. Thomas;M. Wiescher
• 通讯作者: M. Wiescher

Measurement of the 92,93,94,100Mo(γ,n) reactions by Coulomb Dissociation

通过库仑解离测量 92,93,94,100Mo(γ,n) 反应

• DOI: 10.1088/1742-6596/665/1/012034
• 发表时间: 2016
• 期刊: Journal of Physics: Conference Series
• 作者: K Göbel;P Adrich;S Altstadt;H Alvarez-Pol;F Aksouh;T Aumann;M Babilon;K-H Behr;J Benlliure;T Berg;Böhmer;K Boretzky;A Brünle;R Beyer;E Casarejos;M Chartier;D Cortina-Gil;A Chatillon;U Datta;Pramanik;L Deveaux;M Elvers;T W Elze
• 通讯作者: T W Elze