TY  - JOUR
AU  - Fougeres, C. et al
AU  - Domingo-Pardo, C.
PY  - 2023
DA  - 2023//
TI  - Search for Na-22 in novae supported by a novel method for measuring femtosecond nuclear lifetimes
T2  - Nat. Commun.
JO  - Nature Communications
SP  - 4536
EP  - 7pp
VL  - 14
IS  - 1
PB  - Nature Portfolio
AB  - Classical novae are thermonuclear explosions in stellar binary systems, and important sources of Al-26 and Na-22. While ? rays from the decay of the former radioisotope have been observed throughout the Galaxy, Na-22 remains untraceable. Its half-life (2.6 yr) would allow the observation of its 1.275 MeV ?-ray line from a cosmic source. However, the prediction of such an observation requires good knowledge of its nucleosynthesis. The Na-22(p, ?)Mg-23 reaction remains the only source of large uncertainty about the amount of Na-22 ejected. Its rate is dominated by a single resonance on the short-lived state at 7785.0(7) keV in Mg-23. Here, we propose a combined analysis of particle-particle correlations and velocity-difference profiles to measure femtosecond nuclear lifetimes. The application of this method to the study of the Mg-23 states, places strong limits on the amount of Na-22 produced in novae and constrains its detectability with future space-borne observatories. The authors report a particle-particle correlation and velocity-difference profile method to measure nuclear lifetime. The results obtained for excited states of 23Mg are used to constrain the production of 22Na in the astrophysical novae explosions.
UR  - https://arxiv.org/abs/2212.06302
UR  - https://doi.org/10.1038/s41467-023-40121-3
DO  - 10.1038/s41467-023-40121-3
LA  - English
N1  - WOS:001063751200012
ID  - Fougeres+Domingo-Pardo2023
ER  -