Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach

T Rauscher; Naomi Nishimura; Raphael Hirschi; Gabriele Cescutti; A. St. J. Murphy; Alexander Heger

doi:10.7566/JPSCP.14.010509

Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach

T Rauscher, Naomi Nishimura, Raphael Hirschi, Gabriele Cescutti, A. St. J. Murphy, Alexander Heger

School of Physics and Astronomy

Research output: Contribution to conference › Poster

Abstract

Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.

Original language	English
Pages	010509-1-010509-4
Number of pages	4
DOIs	https://doi.org/10.7566/JPSCP.14.010509
Publication status	Published - 2017
Event	International Symposium on Nuclei in the Cosmos 2016 - Toki Messe, Niigata, Japan Duration: 19 Jun 2016 → 24 Jun 2016 Conference number: 14th http://nic2016.jp/

Conference

Conference	International Symposium on Nuclei in the Cosmos 2016
Abbreviated title	NIC2016
Country/Territory	Japan
City	Niigata
Period	19/06/16 → 24/06/16
Internet address	http://nic2016.jp/

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10.7566/JPSCP.14.010509

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Cite this

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title = "Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach",

abstract = "Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.",

author = "T Rauscher and Naomi Nishimura and Raphael Hirschi and Gabriele Cescutti and Murphy, {A. St. J.} and Alexander Heger",

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language = "English",

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note = "International Symposium on Nuclei in the Cosmos 2016, NIC2016 ; Conference date: 19-06-2016 Through 24-06-2016",

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Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach. / Rauscher, T; Nishimura, Naomi; Hirschi, Raphael; Cescutti, Gabriele; Murphy, A. St. J.; Heger, Alexander.

2017. 010509-1-010509-4 Poster session presented at International Symposium on Nuclei in the Cosmos 2016, Niigata, Japan.

Research output: Contribution to conference › Poster

TY - CONF

T1 - Production Uncertainties of p-Nuclei in the γ-Process in Massive Stars Using a Monte Carlo Approach

AU - Rauscher, T

AU - Nishimura, Naomi

AU - Hirschi, Raphael

AU - Cescutti, Gabriele

AU - Murphy, A. St. J.

AU - Heger, Alexander

N1 - Conference code: 14th

PY - 2017

Y1 - 2017

N2 - Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.

AB - Proton-rich nuclei, the so-called p-nuclei, are made in photodisintegration processes in outer shells of massive stars in the course of the final supernova explosion. Nuclear uncertainties in the production of these nuclei have been quantified in a Monte Carlo procedure. Bespoke temperature-dependent uncertainties were assigned to different types of reactions involving nuclei from Fe to Bi and all rates were varied randomly within the uncertainties. The resulting total production uncertainties of the p-nuclei are below a factor of two, with few exceptions. Key reactions dominating the final uncertainties have been identified in an automated procedure using correlations between rate and abundance uncertainties. Our results are compared to those of a previous study manually varying reaction rates.

U2 - 10.7566/JPSCP.14.010509

DO - 10.7566/JPSCP.14.010509

M3 - Poster

SP - 010509-1-010509-4

T2 - International Symposium on Nuclei in the Cosmos 2016

Y2 - 19 June 2016 through 24 June 2016

ER -