The Effects of 26Al Isomeric State on Its Ground State Production

E. T. Li; Maria Lugaro; H. E. Brinkman; C. L. Doherty; B. Côté

doi:10.1007/978-3-030-13876-9_73

The Effects of ²⁶Al Isomeric State on Its Ground State Production

E. T. Li, Maria Lugaro, H. E. Brinkman, C. L. Doherty, B. Côté

School of Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

Abstract

The ground state of unstable ²⁶Al nucleus (²⁶Al^g) with T1/2 = 0.717 Myr was the first radioactive isotope detected in the galaxy, via the characteristic 1.809 MeV Υ-emission of ²⁶Mg (Mahoney et al., Astrophys J 286:578, [1]). The observation is direct proof of ongoing stellar nucleosynthesis in our Galaxy and indicates that there are approximately 2â€“3 M of ²⁶Al^g (Diehl et al., Nature 439:45, [2]).²⁶Al has an isomeric state (²⁶Al^m) which is prohibited to decay into(²⁶Al^g) due to the large spin difference. However, an equilibration between (²⁶Al^g) and (²⁶Al^g) could proceed via intermediate states and influence the abundance of (²⁶Al^g). Hence, the isomer could have an important influence on the production of (²⁶Al^g). A one consistent program is used to investigate the effects of (²⁶Al^m) on (²⁶Al^g) production by using a 20 M stellar model in its hydrogen core burning and C/Ne shell burning.

Original language	English
Title of host publication	Nuclei in the Cosmos XV
Editors	Alba Formicola, Matthias Junker, Lucio Gialanella, Gianluca Imbriani
Place of Publication	Switzerland
Publisher	Springer
Chapter	73
Pages	393-396
Number of pages	4
Volume	219
ISBN (Print)	9783030138752
DOIs	https://doi.org/10.1007/978-3-030-13876-9_73
Publication status	Published - 2019
Event	International Symposium on Nuclei in the Cosmos 2018 - Laboratori Nazionali del Gran Sasso, L'Aquila, Italy Duration: 24 Jun 2018 → 29 Jun 2018 Conference number: 15th https://nic2018.sites.lngs.infn.it/ http://nic2018.lngs.infn.it/

Publication series

Name	Springer Proceedings in Physics
Volume	219
ISSN (Print)	0930-8989
ISSN (Electronic)	1867-4941

Conference

Conference	International Symposium on Nuclei in the Cosmos 2018
Abbreviated title	NIC 2018
Country/Territory	Italy
City	L'Aquila
Period	24/06/18 → 29/06/18
Internet address	https://nic2018.sites.lngs.infn.it/ http://nic2018.lngs.infn.it/

Keywords

Al isomeric state
massive star
stellar nucleosynthesis

Access to Document

10.1007/978-3-030-13876-9_73

Cite this

@inproceedings{4551e976ccf14b88937e3595a32cdae8,

title = "The Effects of 26Al Isomeric State on Its Ground State Production",

abstract = "The ground state of unstable 26Al nucleus (26Alg) with T1/2 = 0.717 Myr was the first radioactive isotope detected in the galaxy, via the characteristic 1.809 MeV Υ-emission of 26Mg (Mahoney et al., Astrophys J 286:578, [1]). The observation is direct proof of ongoing stellar nucleosynthesis in our Galaxy and indicates that there are approximately 2{\^a}€“3 M of 26Alg (Diehl et al., Nature 439:45, [2]).26Al has an isomeric state (26Alm) which is prohibited to decay into(26Alg) due to the large spin difference. However, an equilibration between (26Alg) and (26Alg) could proceed via intermediate states and influence the abundance of (26Alg). Hence, the isomer could have an important influence on the production of (26Alg). A one consistent program is used to investigate the effects of (26Alm) on (26Alg) production by using a 20 M stellar model in its hydrogen core burning and C/Ne shell burning.",

keywords = "Al isomeric state, massive star, stellar nucleosynthesis",

author = "Li, \{E. T.\} and Maria Lugaro and Brinkman, \{H. E.\} and Doherty, \{C. L.\} and B. C{\^o}t{\'e}",

note = "Funding Information: This work is supported by: National Natural Science Foundation of China (11505117), Natural Science Foundation of Guangdong Province (2015A030310012) and the ERC via CoG-2016 RADIOSTAR [8] (Grant Agreement 724560). E. T. Li would like to give gratitude to the financial support of China Scholarship Council (CSC) for one year research in Konkoly Observatory, Hungarian Academy of Sciences. Publisher Copyright: {\textcopyright} 2019, Springer Nature Switzerland AG.; International Symposium on Nuclei in the Cosmos 2018, NIC 2018 ; Conference date: 24-06-2018 Through 29-06-2018",

year = "2019",

doi = "10.1007/978-3-030-13876-9\_73",

language = "English",

isbn = "9783030138752",

volume = "219",

series = "Springer Proceedings in Physics",

publisher = "Springer",

pages = "393--396",

editor = "Alba Formicola and Matthias Junker and Lucio Gialanella and Gianluca Imbriani",

booktitle = "Nuclei in the Cosmos XV",

address = "Switzerland",

url = "https://nic2018.sites.lngs.infn.it/, http://nic2018.lngs.infn.it/",

}

Li, ET, Lugaro, M, Brinkman, HE, Doherty, CL & Côté, B 2019, The Effects of ²⁶Al Isomeric State on Its Ground State Production. in A Formicola, M Junker, L Gialanella & G Imbriani (eds), Nuclei in the Cosmos XV. vol. 219, Springer Proceedings in Physics, vol. 219, Springer, Switzerland, pp. 393-396, International Symposium on Nuclei in the Cosmos 2018, L'Aquila, Italy, 24/06/18. https://doi.org/10.1007/978-3-030-13876-9_73

The Effects of ²⁶Al Isomeric State on Its Ground State Production. / Li, E. T.; Lugaro, Maria; Brinkman, H. E. et al.
Nuclei in the Cosmos XV. ed. / Alba Formicola; Matthias Junker; Lucio Gialanella; Gianluca Imbriani. Vol. 219 Switzerland: Springer, 2019. p. 393-396 (Springer Proceedings in Physics; Vol. 219).

Research output: Chapter in Book/Report/Conference proceeding › Conference Paper › Research

TY - GEN

T1 - The Effects of 26Al Isomeric State on Its Ground State Production

AU - Li, E. T.

AU - Lugaro, Maria

AU - Brinkman, H. E.

AU - Doherty, C. L.

AU - Côté, B.

N1 - Conference code: 15th

PY - 2019

Y1 - 2019

N2 - The ground state of unstable 26Al nucleus (26Alg) with T1/2 = 0.717 Myr was the first radioactive isotope detected in the galaxy, via the characteristic 1.809 MeV Υ-emission of 26Mg (Mahoney et al., Astrophys J 286:578, [1]). The observation is direct proof of ongoing stellar nucleosynthesis in our Galaxy and indicates that there are approximately 2â€“3 M of 26Alg (Diehl et al., Nature 439:45, [2]).26Al has an isomeric state (26Alm) which is prohibited to decay into(26Alg) due to the large spin difference. However, an equilibration between (26Alg) and (26Alg) could proceed via intermediate states and influence the abundance of (26Alg). Hence, the isomer could have an important influence on the production of (26Alg). A one consistent program is used to investigate the effects of (26Alm) on (26Alg) production by using a 20 M stellar model in its hydrogen core burning and C/Ne shell burning.

AB - The ground state of unstable 26Al nucleus (26Alg) with T1/2 = 0.717 Myr was the first radioactive isotope detected in the galaxy, via the characteristic 1.809 MeV Υ-emission of 26Mg (Mahoney et al., Astrophys J 286:578, [1]). The observation is direct proof of ongoing stellar nucleosynthesis in our Galaxy and indicates that there are approximately 2â€“3 M of 26Alg (Diehl et al., Nature 439:45, [2]).26Al has an isomeric state (26Alm) which is prohibited to decay into(26Alg) due to the large spin difference. However, an equilibration between (26Alg) and (26Alg) could proceed via intermediate states and influence the abundance of (26Alg). Hence, the isomer could have an important influence on the production of (26Alg). A one consistent program is used to investigate the effects of (26Alm) on (26Alg) production by using a 20 M stellar model in its hydrogen core burning and C/Ne shell burning.

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BT - Nuclei in the Cosmos XV

A2 - Formicola, Alba

A2 - Junker, Matthias

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T2 - International Symposium on Nuclei in the Cosmos 2018

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