Explanipedia

GRB 250702B: discovery of a gamma-ray burst from a black hole falling into a star Open

Eliza Neights, Eric Burns, Chris L. Fryer, D. Svinkin, Suman Bala , et al. · 2025

Gamma-ray bursts are the most luminous electromagnetic events in the Universe. Their prompt gamma-ray emission has typical durations between a fraction of a second and several minutes. A rare subset of these events have durations in excess…

GRB 250702B: Discovery of a Gamma-Ray Burst from a Black Hole Falling into a Star Open

Eliza Neights, Eric Burns, Chris L. Fryer, D. Svinkin, Suman Bala , et al. · 2025

Gamma-ray bursts are the most luminous electromagnetic events in the universe. Their prompt gamma-ray emission has typical durations between a fraction of a second and several minutes. A rare subset of these events have durations in excess…

First Measurement of a Weak -Process Reaction on a Radioactive Nucleus Open

M. Williams, C. Angus, A. M. Laird, B. Davids, C. Aa. Diget , et al. · 2025

Physics Chemistry

This Letter reports on the first cross-section measurements for the ^{94}Sr(α,n)^{97}Zr and ^{86}Kr(α,n)^{89}Sr reactions. In particular, our measurement of ^{94}Sr(α,n)^{97}Zr is the first weak r-process reaction cross section obtained us…

energy levels approaching the -particle threshold Open

C. Angus, J. Frost-Schenk, A. M. Laird, P. Adsley, R. Longland , et al. · 2024

Physics Biology

Nuclei around Ne20 exhibit an interplay of different excitations caused by different aspects of nuclear structure, including single-particle and multiparticle configurations and collective rotations. One-nucleon transfer reactions selectiv…

Measurement of the 86Kr(α,n)89Sr cross section at energies relevant for the weak r-process Open

C. Angus, M. Williams, A. N. Andreyev, S. S. Bhattacharjee, Samantha Buck , et al. · 2023

Physics

The r-process has been shown to be robust in reproducing the abundance distributions of heavy elements, such as europium, seen in ultra-metal poor stars. In contrast, observations of elements 26 < Z < 47 display overabundances relative to …

Evolution of Accreting Neutron Star Common Envelopes and Their Nucleosynthesis Possible P-nuclide Production Open

Sophie E. D. Abrahams, Chris L. Fryer, Alexander D. Hall-Smith, A. M. Laird, C. Aa. Diget · 2023

Physics Computer science

In a binary system, a short lived phase called a common envelope can occur in which both stars share the envelope of the primary. During this phase, there is the opportunity for nucleosynthesis to occur at high temperatures and densities i…

The impact of 17O + α reaction rate uncertainties on the s-process in rotating massive stars Open

J. Frost-Schenk, P. Adsley, A. M. Laird, R. Longland, C. Angus , et al. · 2022

Physics Chemistry

Massive stars are crucial to galactic chemical evolution for elements heavier than iron. Their contribution at early times in the evolution of the Universe, however, is unclear due to poorly constrained nuclear reaction rates. The competin…

New Experimental 23Na(α, p)26Mg Reaction Rate for Massive Star and Type Ia Supernova Models Open

N. Hubbard, C. Aa. Diget, S. P. Fox, H. O. U. Fynbo, A. Howard , et al. · 2021

Physics

The 23 Na( α , p ) 26 Mg reaction has been identified as having a significant impact on the nucleosynthesis of several nuclei between Ne and Ti in Type Ia supernovae, and of 23 Na and 26 Al in massive stars. The reaction has been subjected…

The MUGAST-AGATA-VAMOS campaign : set-up and performance Open

M. Assié, E. Clément, A. Lemasson, D. Ramos, A. Raggio , et al. · 2021

Physics Biology Medicine

The MUGAST-AGATA-VAMOS set-up at GANIL combines the MUGAST highly-segmented silicon array with the state-of-the-art AGATA array and the large acceptance VAMOS spectrometer. The mechanical and electronics integration copes with the constrai…

From nuclei to neutron stars: simple binding energy computer modelling in the classroom (part 1) Open

Alessandro Pastore, A. M. Romero, C. Aa. Diget, Arnau Rios, K Leech , et al. · 2021

Physics Psychology Philosophy

We present a simple activity based on the liquid-drop model which allows secondary school students to explore the uses of mathematical models and gain an intuitive understanding of the concept of binding energy, and in particular the signi…

An implantation Diamond detector as a beam monitor for an intense radioactive ion beam Open

J S Rojo, C. Aa. Diget, N. de Séréville, M. Assié, A. Lemasson , et al. · 2020

Physics Materials science

We present the characterization of a Diamond detector and its response as a beam rate monitor with full stopping of radioactive ion beams of high intensity. The detector has been implemented in the VAMOS focal plane at GANIL and utilised i…

Single-particle structure in neutron-rich Sr isotopes approaching the N = 60 shape transition Open

S. Cruz, K. Wimmer, S. S. Bhattacharjee, P. C. Bender, G. Hackman , et al. · 2020

Physics

Background: Neutron-rich nuclei around neutron number N = 60 show a dramatic shape transition from spherical ground states to prolate deformation in 98Sr and heavier nuclei. Purpose: The purpose of this study is to investigate the single-p…

Single-Particle Structure of Neutron-Rich Sr Isotopes Via d( 94,95,96 Sr, p) Reactions Open

S. Cruz, K. Wimmer, P. C. Bender, R. Krücken, G. Hackman , et al. · 2019

Physics

The region around neutron number N = 60 in the neutron-rich Sr and Zr nuclei is one of the most dramatic examples of a ground state shape transition from (near) spherical below N = 60 to strongly deformed shapes in the heavier isotopes. Th…

Nucleosynthetic yields from neutron stars accreting in binary common envelopes Open

J Keegans, Chris L. Fryer, Samuel Jones, Benoît Côté, Krzysztof Belczyński , et al. · 2019

Physics Sociology Biology

Massive-star binaries can undergo a phase where one of the two stars expands during its advanced evolutionary stage as a giant and envelops its companion, ejecting the hydrogen envelope and tightening its orbit. Such a common envelope phas…

Isospin-symmetry breaking corrections for the description of triplet energy differences Open

S. M. Lenzi, M. A. Bentley, R. Lau, C. Aa. Diget · 2018

Physics

The charge-independence breaking of the nuclear interaction is analyzed by means of energy differences \namong analog states in T=1 isobaric multiplets. Data on triplet energy differences in the sd, pf, and pf5/2g shells, i.e., 18<A<66, ar…

Rotational excitation of the Hoyle state in 12C Open

R. Garg, C. J. Barton, C. Aa. Diget, S. Courtin, G. Fruet , et al. · 2018

Physics Computer science Biology

International audience

A new statistical method for the structure of the inner crust of neutron stars Open

Alessandro Pastore, Matthew Shelley, Simone Baroni, C. Aa. Diget · 2017

Physics Mathematics

We investigated the structure of the low density regions of the inner crust\nof neutron stars using the Hartree-Fock-Bogoliubov (HFB) model to predict the\nproton content $Z$ of the nuclear clusters and, together with the lattice\nspacing,…

Search for highly excited states in 28Si Open

D. Montanari, S. Courtin, D. G. Jenkins, C. Aa. Diget, Nuray Yavuzkanat , et al. · 2017

Physics Computer science Psychology

CITATION: Montanari, D., et al. 2017. Search for highly excited states in ²⁸Si. Journal of Physics: Conference Series, 863(1):012051, doi:10.1088/1742-6596/863/1/012051.

CAKE: the coincidence array for K600 experiments Open

P. Adsley, R. Neveling, P. Papka, Z. Dyers, J. W. Brümmer , et al. · 2017

Physics Materials science Medicine

The combination of a magnetic spectrometer and ancillary detectors such as silicon detectors is a powerful tool for the study of nuclear reactions and nuclear structure. This paper discusses the recently commissioned silicon array called t…

Isospin Symmetry at High Spin Studied via Nucleon Knockout from Isomeric States Open

S. A. Milne, M. A. Bentley, E. C. Simpson, T. Baugher, D. Bazin , et al. · 2016

Physics Computer science Sociology

One-neutron knockout reactions have been performed on a beam of radioactive ^{53}Co in a high-spin isomeric state. The analysis is shown to yield a highly selective population of high-spin states in an exotic nucleus with a significant cro…

Shell evolution approaching the N= 20 island of inversion: Structure of 26Na Open

G. L. Wilson, W. N. Catford, N. A. Orr, C. Aa. Diget, A. Matta , et al. · 2016

Physics Biology

The levels in 26Na with single particle character have been observed for the first time using the d(25Na, pγ ) reaction at 5 MeV/nucleon. The measured excitation energies and the deduced spectroscopic factors are in good overall agreement …

A Study Of 23Na And 12C Open

A. Howard, M. Münch, H. O. U. Fynbo, O. S. Kirsebom, Karsten Laursen , et al. · 2016

Physics Chemistry Materials science

Progress report for first part of Ph.D. studies. Describes my work on the DAQ for Aarhus 5MV accelerator. A newly developed analysis and simulation library for small scale DSSD experiments. Futhermore, an experimental study of 23Na(a,p) an…

Study of the26Al(n,p)26Mg and26Al(n,α)23Na reactions using the27Al(p,p')27Al inelastic scattering reaction Open

S. Benamara, N. de Séréville, P. Adsley, A. M. Laird, F. Hammache , et al. · 2016

Physics Chemistry

26Al was the first cosmic radioactivity ever detected in the galaxy as well as one \nof the first extinct radioactivity observed in refractory phases of meteorites. Its nucleosynthesis \nin massive stars is still uncertain mainly due to th…

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