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Direct Measurement of the $^{59}$Cu$(p,α)^{56}$Ni Excitation Function to Constrain the Ni--Cu Cycle Strength and Its Impact on Explosive Nucleosynthesis

Fuente: arXiv

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Détails bibliographiques
Auteurs principaux:	Lopez-Saavedra, E., Avila, M. L., Ong, W. -J., Mohr, P., Ahn, S., Arora, H., Balliet, L., Bhatt, K., Cha, S. M., Chipps, K. A., Dopfer, J., Tolstukhin, I. A., Jain, R., Kim, M. J., Kolos, K., Montes, F., Neto, D., Pain, S. D., Pereira, J., Randhawa, J. S., Sun, L. J., Ugalde, C., Wagner, L.
Format:	Preprint
Publié:	2026
Sujets:	Nuclear Experiment
Accès en ligne:	Acceder al recurso
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_version_	1866914292963475456
author	Lopez-Saavedra, E. Avila, M. L. Ong, W. -J. Mohr, P. Ahn, S. Arora, H. Balliet, L. Bhatt, K. Cha, S. M. Chipps, K. A. Dopfer, J. Tolstukhin, I. A. Jain, R. Kim, M. J. Kolos, K. Montes, F. Neto, D. Pain, S. D. Pereira, J. Randhawa, J. S. Sun, L. J. Ugalde, C. Wagner, L.
author_facet	Lopez-Saavedra, E. Avila, M. L. Ong, W. -J. Mohr, P. Ahn, S. Arora, H. Balliet, L. Bhatt, K. Cha, S. M. Chipps, K. A. Dopfer, J. Tolstukhin, I. A. Jain, R. Kim, M. J. Kolos, K. Montes, F. Neto, D. Pain, S. D. Pereira, J. Randhawa, J. S. Sun, L. J. Ugalde, C. Wagner, L.
contents	A new direct measurement of the $^{59}$Cu$(p,α){}^{56}$Ni excitation function from 2.43 to 5.88~MeV in the center-of-mass frame was performed in inverse kinematics using the high-efficiency MUSIC active-target detector at FRIB. This reaction plays a critical role in constraining the strength of the Ni--Cu cycle in explosive astrophysical environments such as Type~I X-ray bursts and the $ν$p-process in neutrino-driven winds following core-collapse supernovae. The newly derived stellar reaction rate is systematically lower than the REACLIB evaluation, resulting in less than 0.1\% recycling through the Ni--Cu cycle in X-ray bursts and an enhanced efficiency of the $ν$p-process up to temperatures of $T_9 \approx 3.7$.
format	Preprint
id	arxiv_https___arxiv_org_abs_2601_22262
institution	arXiv
publishDate	2026
record_format	arxiv
spellingShingle	Direct Measurement of the $^{59}$Cu$(p,α)^{56}$Ni Excitation Function to Constrain the Ni--Cu Cycle Strength and Its Impact on Explosive Nucleosynthesis Lopez-Saavedra, E. Avila, M. L. Ong, W. -J. Mohr, P. Ahn, S. Arora, H. Balliet, L. Bhatt, K. Cha, S. M. Chipps, K. A. Dopfer, J. Tolstukhin, I. A. Jain, R. Kim, M. J. Kolos, K. Montes, F. Neto, D. Pain, S. D. Pereira, J. Randhawa, J. S. Sun, L. J. Ugalde, C. Wagner, L. Nuclear Experiment A new direct measurement of the $^{59}$Cu$(p,α){}^{56}$Ni excitation function from 2.43 to 5.88~MeV in the center-of-mass frame was performed in inverse kinematics using the high-efficiency MUSIC active-target detector at FRIB. This reaction plays a critical role in constraining the strength of the Ni--Cu cycle in explosive astrophysical environments such as Type~I X-ray bursts and the $ν$p-process in neutrino-driven winds following core-collapse supernovae. The newly derived stellar reaction rate is systematically lower than the REACLIB evaluation, resulting in less than 0.1\% recycling through the Ni--Cu cycle in X-ray bursts and an enhanced efficiency of the $ν$p-process up to temperatures of $T_9 \approx 3.7$.
title	Direct Measurement of the $^{59}$Cu$(p,α)^{56}$Ni Excitation Function to Constrain the Ni--Cu Cycle Strength and Its Impact on Explosive Nucleosynthesis
topic	Nuclear Experiment
url	https://arxiv.org/abs/2601.22262